stdlib_defs.mtlx

<?xml version="1.0"?>
<materialx version="1.38">
  <!--
    TM & (c) 2019 Lucasfilm Entertainment Company Ltd. and Lucasfilm Ltd.
    All rights reserved.  See LICENSE.txt for license.

    Declarations of standard data types and nodes included in the MaterialX specification.
  -->

  <!-- ======================================================================== -->
  <!-- Data types                                                               -->
  <!-- ======================================================================== -->

  <typedef name="boolean" />
  <typedef name="integer" />
  <typedef name="float" />
  <typedef name="color3" semantic="color" />
  <typedef name="color4" semantic="color" />
  <typedef name="vector2" />
  <typedef name="vector3" />
  <typedef name="vector4" />
  <typedef name="matrix33" />
  <typedef name="matrix44" />
  <typedef name="string" />
  <typedef name="filename" />
  <typedef name="geomname" />
  <typedef name="surfaceshader" semantic="shader" context="surface" />
  <typedef name="displacementshader" semantic="shader" context="displacement" />
  <typedef name="volumeshader" semantic="shader" context="volume" />
  <typedef name="lightshader" semantic="shader" context="light" />
  <typedef name="material" semantic="material" />
  <typedef name="none" />

  <typedef name="integerarray" />
  <typedef name="floatarray" />
  <typedef name="color3array" semantic="color" />
  <typedef name="color4array" semantic="color" />
  <typedef name="vector2array" />
  <typedef name="vector3array" />
  <typedef name="vector4array" />
  <typedef name="stringarray" />
  <typedef name="geomnamearray" />

  <!-- ======================================================================== -->
  <!-- Units and unit types                                                     -->
  <!-- ======================================================================== -->

  <unittypedef name="distance" />
  <unitdef name="UD_stdlib_distance" unittype="distance">
    <unit name="nanometer" scale="0.000000001" />
    <unit name="micron" scale="0.000001" />
    <unit name="millimeter" scale="0.001" />
    <unit name="centimeter" scale="0.01" />
    <unit name="inch" scale="0.0254" />
    <unit name="foot" scale="0.3048" />
    <unit name="yard" scale="0.9144" />
    <unit name="meter" scale="1.0" />
    <unit name="kilometer" scale="1000.0" />
    <unit name="mile" scale="1609.344" />
  </unitdef>

  <unittypedef name="angle" />
  <unitdef name="UD_stdlib_angle" unittype="angle">
    <unit name="degree" scale="1.0" />
    <unit name="radian" scale="57.295779513" />
  </unitdef>

  <!-- ======================================================================== -->
  <!-- Geometric Properties                                                     -->
  <!-- ======================================================================== -->

  <geompropdef name="Pobject" type="vector3" geomprop="position" space="object" />
  <geompropdef name="Nobject" type="vector3" geomprop="normal" space="object" />
  <geompropdef name="Tobject" type="vector3" geomprop="tangent" space="object" index="0" />
  <geompropdef name="Bobject" type="vector3" geomprop="bitangent" space="object" index="0" />
  <geompropdef name="Pworld" type="vector3" geomprop="position" space="world" />
  <geompropdef name="Nworld" type="vector3" geomprop="normal" space="world" />
  <geompropdef name="Tworld" type="vector3" geomprop="tangent" space="world" index="0" />
  <geompropdef name="Bworld" type="vector3" geomprop="bitangent" space="world" index="0" />
  <geompropdef name="UV0" type="vector2" geomprop="texcoord" index="0" />

  <!-- ======================================================================== -->
  <!-- Materials                                                                -->
  <!-- ======================================================================== -->

  <!-- Surface material -->
  <nodedef name="ND_surfacematerial" node="surfacematerial" nodegroup="material">
    <input name="surfaceshader" type="surfaceshader" value="" />
    <input name="displacementshader" type="displacementshader" value="" />
    <output name="out" type="material" />
  </nodedef>

  <!-- Volume material -->
  <nodedef name="ND_volumematerial" node="volumematerial" nodegroup="material">
    <input name="volumeshader" type="volumeshader" value="" />
    <output name="out" type="material" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Shader nodes                                                             -->
  <!-- ======================================================================== -->

  <!--
    Node: <surface_unlit>
    An unlit surface shader node. Represents a surface that can emit and transmit light, 
    but does not receive illumination from light sources or other surfaces.
  -->
  <nodedef name="ND_surface_unlit" node="surface_unlit" nodegroup="shader" doc="Construct a surface shader from emission and transmission values.">
    <input name="emission" type="float" value="1.0" doc="Surface emission amount." />
    <input name="emission_color" type="color3" value="1,1,1" doc="Surface emission color." />
    <input name="transmission" type="float" value="0.0" doc="Surface transmission amount." />
    <input name="transmission_color" type="color3" value="1,1,1" doc="Surface transmission color." />
    <input name="opacity" type="float" value="1.0" doc="Surface cutout opacity." />
    <output name="out" type="surfaceshader" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Texture nodes                                                            -->
  <!-- ======================================================================== -->

  <!--
    Node: <image>
    Samples data from a single image, or from a layer within a multi-layer image.
  -->
  <nodedef name="ND_image_float" node="image" nodegroup="texture2d">
    <input name="file" type="filename" value="" uiname="Filename" uniform="true" />
    <input name="layer" type="string" value="" uiname="Layer" uniform="true" />
    <input name="default" type="float" value="0.0" uiname="Default Color" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" uiname="Texture Coordinates" />
    <input name="uaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode U" uniform="true" />
    <input name="vaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode V" uniform="true" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uiname="Filter Type" uniform="true" />
    <input name="framerange" type="string" value="" uiname="Frame Range" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uiname="Frame Offset" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uiname="Frame End Action" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_image_color3" node="image" nodegroup="texture2d">
    <input name="file" type="filename" value="" uiname="Filename" uniform="true" />
    <input name="layer" type="string" value="" uiname="Layer" uniform="true" />
    <input name="default" type="color3" value="0.0, 0.0, 0.0" uiname="Default Color" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" uiname="Texture Coordinates" />
    <input name="uaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode U" uniform="true" />
    <input name="vaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode V" uniform="true" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uiname="Filter Type" uniform="true" />
    <input name="framerange" type="string" value="" uiname="Frame Range" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uiname="Frame Offset" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uiname="Frame End Action" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_image_color4" node="image" nodegroup="texture2d">
    <input name="file" type="filename" value="" uiname="Filename" uniform="true" />
    <input name="layer" type="string" value="" uiname="Layer" uniform="true" />
    <input name="default" type="color4" value="0.0, 0.0, 0.0, 0.0" uiname="Default Color" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" uiname="Texture Coordinates" />
    <input name="uaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode U" uniform="true" />
    <input name="vaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode V" uniform="true" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uiname="Filter Type" uniform="true" />
    <input name="framerange" type="string" value="" uiname="Frame Range" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uiname="Frame Offset" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uiname="Frame End Action" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_image_vector2" node="image" nodegroup="texture2d">
    <input name="file" type="filename" value="" uiname="Filename" uniform="true" />
    <input name="layer" type="string" value="" uiname="Layer" uniform="true" />
    <input name="default" type="vector2" value="0.0, 0.0" uiname="Default Color" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" uiname="Texture Coordinates" />
    <input name="uaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode U" uniform="true" />
    <input name="vaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode V" uniform="true" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uiname="Filter Type" uniform="true" />
    <input name="framerange" type="string" value="" uiname="Frame Range" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uiname="Frame Offset" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uiname="Frame End Action" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_image_vector3" node="image" nodegroup="texture2d">
    <input name="file" type="filename" value="" uiname="Filename" uniform="true" />
    <input name="layer" type="string" value="" uiname="Layer" uniform="true" />
    <input name="default" type="vector3" value="0.0, 0.0, 0.0" uiname="Default Color" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" uiname="Texture Coordinates" />
    <input name="uaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode U" uniform="true" />
    <input name="vaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode V" uniform="true" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uiname="Filter Type" uniform="true" />
    <input name="framerange" type="string" value="" uiname="Frame Range" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uiname="Frame Offset" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uiname="Frame End Action" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_image_vector4" node="image" nodegroup="texture2d">
    <input name="file" type="filename" value="" uiname="Filename" uniform="true" />
    <input name="layer" type="string" value="" uiname="Layer" uniform="true" />
    <input name="default" type="vector4" value="0.0, 0.0, 0.0, 0.0" uiname="Default Color" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" uiname="Texture Coordinates" />
    <input name="uaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode U" uniform="true" />
    <input name="vaddressmode" type="string" value="periodic" enum="constant,clamp,periodic,mirror" uiname="Address Mode V" uniform="true" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uiname="Filter Type" uniform="true" />
    <input name="framerange" type="string" value="" uiname="Frame Range" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uiname="Frame Offset" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uiname="Frame End Action" uniform="true" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <tiledimage> Supplemental Node
    Samples data from a single image, with provisions for tiling and offsetting the image
    across uv space.
  -->
  <nodedef name="ND_tiledimage_float" node="tiledimage" nodegroup="texture2d">
    <input name="file" type="filename" value="" uniform="true" />
    <input name="default" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="uvtiling" type="vector2" value="1.0, 1.0" />
    <input name="uvoffset" type="vector2" value="0.0, 0.0" />
    <input name="realworldimagesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="realworldtilesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_tiledimage_color3" node="tiledimage" nodegroup="texture2d">
    <input name="file" type="filename" value="" uniform="true" />
    <input name="default" type="color3" value="0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="uvtiling" type="vector2" value="1.0, 1.0" />
    <input name="uvoffset" type="vector2" value="0.0, 0.0" />
    <input name="realworldimagesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="realworldtilesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_tiledimage_color4" node="tiledimage" nodegroup="texture2d">
    <input name="file" type="filename" value="" uniform="true" />
    <input name="default" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="uvtiling" type="vector2" value="1.0, 1.0" />
    <input name="uvoffset" type="vector2" value="0.0, 0.0" />
    <input name="realworldimagesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="realworldtilesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_tiledimage_vector2" node="tiledimage" nodegroup="texture2d">
    <input name="file" type="filename" value="" uniform="true" />
    <input name="default" type="vector2" value="0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="uvtiling" type="vector2" value="1.0, 1.0" />
    <input name="uvoffset" type="vector2" value="0.0, 0.0" />
    <input name="realworldimagesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="realworldtilesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_tiledimage_vector3" node="tiledimage" nodegroup="texture2d">
    <input name="file" type="filename" value="" uniform="true" />
    <input name="default" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="uvtiling" type="vector2" value="1.0, 1.0" />
    <input name="uvoffset" type="vector2" value="0.0, 0.0" />
    <input name="realworldimagesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="realworldtilesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_tiledimage_vector4" node="tiledimage" nodegroup="texture2d">
    <input name="file" type="filename" value="" uniform="true" />
    <input name="default" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="uvtiling" type="vector2" value="1.0, 1.0" />
    <input name="uvoffset" type="vector2" value="0.0, 0.0" />
    <input name="realworldimagesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="realworldtilesize" type="vector2" value="1.0, 1.0" unittype="distance" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <triplanarprojection> Supplemental Node
    Samples data from three images, or layers within multi-layer images, and projects a tiled
    representation of the images along each of the three respective coordinate axes, computing
    a weighted blend of the three samples using the geometric normal.
  -->
  <nodedef name="ND_triplanarprojection_float" node="triplanarprojection" nodegroup="texture3d">
    <input name="filex" type="filename" value="" uniform="true" />
    <input name="filey" type="filename" value="" uniform="true" />
    <input name="filez" type="filename" value="" uniform="true" />
    <input name="layerx" type="string" value="" uniform="true" />
    <input name="layery" type="string" value="" uniform="true" />
    <input name="layerz" type="string" value="" uniform="true" />
    <input name="default" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="normal" type="vector3" defaultgeomprop="Nobject" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_triplanarprojection_color3" node="triplanarprojection" nodegroup="texture3d">
    <input name="filex" type="filename" value="" uniform="true" />
    <input name="filey" type="filename" value="" uniform="true" />
    <input name="filez" type="filename" value="" uniform="true" />
    <input name="layerx" type="string" value="" uniform="true" />
    <input name="layery" type="string" value="" uniform="true" />
    <input name="layerz" type="string" value="" uniform="true" />
    <input name="default" type="color3" value="0.0, 0.0, 0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="normal" type="vector3" defaultgeomprop="Nobject" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_triplanarprojection_color4" node="triplanarprojection" nodegroup="texture3d">
    <input name="filex" type="filename" value="" uniform="true" />
    <input name="filey" type="filename" value="" uniform="true" />
    <input name="filez" type="filename" value="" uniform="true" />
    <input name="layerx" type="string" value="" uniform="true" />
    <input name="layery" type="string" value="" uniform="true" />
    <input name="layerz" type="string" value="" uniform="true" />
    <input name="default" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="normal" type="vector3" defaultgeomprop="Nobject" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_triplanarprojection_vector2" node="triplanarprojection" nodegroup="texture3d">
    <input name="filex" type="filename" value="" uniform="true" />
    <input name="filey" type="filename" value="" uniform="true" />
    <input name="filez" type="filename" value="" uniform="true" />
    <input name="layerx" type="string" value="" uniform="true" />
    <input name="layery" type="string" value="" uniform="true" />
    <input name="layerz" type="string" value="" uniform="true" />
    <input name="default" type="vector2" value="0.0, 0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="normal" type="vector3" defaultgeomprop="Nobject" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_triplanarprojection_vector3" node="triplanarprojection" nodegroup="texture3d">
    <input name="filex" type="filename" value="" uniform="true" />
    <input name="filey" type="filename" value="" uniform="true" />
    <input name="filez" type="filename" value="" uniform="true" />
    <input name="layerx" type="string" value="" uniform="true" />
    <input name="layery" type="string" value="" uniform="true" />
    <input name="layerz" type="string" value="" uniform="true" />
    <input name="default" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="normal" type="vector3" defaultgeomprop="Nobject" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_triplanarprojection_vector4" node="triplanarprojection" nodegroup="texture3d">
    <input name="filex" type="filename" value="" uniform="true" />
    <input name="filey" type="filename" value="" uniform="true" />
    <input name="filez" type="filename" value="" uniform="true" />
    <input name="layerx" type="string" value="" uniform="true" />
    <input name="layery" type="string" value="" uniform="true" />
    <input name="layerz" type="string" value="" uniform="true" />
    <input name="default" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="normal" type="vector3" defaultgeomprop="Nobject" />
    <input name="filtertype" type="string" value="linear" enum="closest,linear,cubic" uniform="true" />
    <input name="framerange" type="string" value="" uniform="true" />
    <input name="frameoffset" type="integer" value="0" uniform="true" />
    <input name="frameendaction" type="string" value="constant" enum="constant,clamp,periodic,mirror" uniform="true" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Procedural nodes                                                         -->
  <!-- ======================================================================== -->

  <!--
    Node: <constant>
    A constant value. When exposed as a public parameter, this is a way to create a
    value that can be accessed in multiple places in the opgraph.
  -->
  <nodedef name="ND_constant_float" node="constant" nodegroup="procedural">
    <input name="value" type="float" value="0.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_constant_color3" node="constant" nodegroup="procedural">
    <input name="value" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_constant_color4" node="constant" nodegroup="procedural">
    <input name="value" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_constant_vector2" node="constant" nodegroup="procedural">
    <input name="value" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_constant_vector3" node="constant" nodegroup="procedural">
    <input name="value" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_constant_vector4" node="constant" nodegroup="procedural">
    <input name="value" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_constant_boolean" node="constant" nodegroup="procedural">
    <input name="value" type="boolean" value="false" />
    <output name="out" type="boolean" default="false" />
  </nodedef>
  <nodedef name="ND_constant_integer" node="constant" nodegroup="procedural">
    <input name="value" type="integer" value="0" />
    <output name="out" type="integer" default="0" />
  </nodedef>
  <nodedef name="ND_constant_matrix33" node="constant" nodegroup="procedural">
    <input name="value" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <output name="out" type="matrix33" default="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
  </nodedef>
  <nodedef name="ND_constant_matrix44" node="constant" nodegroup="procedural">
    <input name="value" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <output name="out" type="matrix44" default="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
  </nodedef>
  <nodedef name="ND_constant_string" node="constant" nodegroup="procedural">
    <input name="value" type="string" value="" uniform="true" />
    <output name="out" type="string" default="" />
  </nodedef>
  <nodedef name="ND_constant_filename" node="constant" nodegroup="procedural">
    <input name="value" type="filename" value="" uniform="true" />
    <output name="out" type="filename" default="" />
  </nodedef>

  <!--
    Node: <ramplr>
    A left-to-right bilinear value ramp.
  -->
  <nodedef name="ND_ramplr_float" node="ramplr" nodegroup="procedural2d">
    <input name="valuel" type="float" value="0.0" />
    <input name="valuer" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_ramplr_color3" node="ramplr" nodegroup="procedural2d">
    <input name="valuel" type="color3" value="0.0, 0.0, 0.0" />
    <input name="valuer" type="color3" value="0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramplr_color4" node="ramplr" nodegroup="procedural2d">
    <input name="valuel" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valuer" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramplr_vector2" node="ramplr" nodegroup="procedural2d">
    <input name="valuel" type="vector2" value="0.0, 0.0" />
    <input name="valuer" type="vector2" value="0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramplr_vector3" node="ramplr" nodegroup="procedural2d">
    <input name="valuel" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="valuer" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramplr_vector4" node="ramplr" nodegroup="procedural2d">
    <input name="valuel" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valuer" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <ramptb>
    A top-to-bottom bilinear value ramp.
  -->
  <nodedef name="ND_ramptb_float" node="ramptb" nodegroup="procedural2d">
    <input name="valuet" type="float" value="0.0" />
    <input name="valueb" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_ramptb_color3" node="ramptb" nodegroup="procedural2d">
    <input name="valuet" type="color3" value="0.0, 0.0, 0.0" />
    <input name="valueb" type="color3" value="0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramptb_color4" node="ramptb" nodegroup="procedural2d">
    <input name="valuet" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valueb" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramptb_vector2" node="ramptb" nodegroup="procedural2d">
    <input name="valuet" type="vector2" value="0.0, 0.0" />
    <input name="valueb" type="vector2" value="0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramptb_vector3" node="ramptb" nodegroup="procedural2d">
    <input name="valuet" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="valueb" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramptb_vector4" node="ramptb" nodegroup="procedural2d">
    <input name="valuet" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valueb" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <ramp4> Supplemental Node
    A 4-corner bilinear value ramp.
  -->
  <nodedef name="ND_ramp4_float" node="ramp4" nodegroup="procedural2d">
    <input name="valuetl" type="float" value="0.0" />
    <input name="valuetr" type="float" value="0.0" />
    <input name="valuebl" type="float" value="0.0" />
    <input name="valuebr" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_ramp4_color3" node="ramp4" nodegroup="procedural2d">
    <input name="valuetl" type="color3" value="0.0, 0.0, 0.0" />
    <input name="valuetr" type="color3" value="0.0, 0.0, 0.0" />
    <input name="valuebl" type="color3" value="0.0, 0.0, 0.0" />
    <input name="valuebr" type="color3" value="0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramp4_color4" node="ramp4" nodegroup="procedural2d">
    <input name="valuetl" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valuetr" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valuebl" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valuebr" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramp4_vector2" node="ramp4" nodegroup="procedural2d">
    <input name="valuetl" type="vector2" value="0.0, 0.0" />
    <input name="valuetr" type="vector2" value="0.0, 0.0" />
    <input name="valuebl" type="vector2" value="0.0, 0.0" />
    <input name="valuebr" type="vector2" value="0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramp4_vector3" node="ramp4" nodegroup="procedural2d">
    <input name="valuetl" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="valuetr" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="valuebl" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="valuebr" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_ramp4_vector4" node="ramp4" nodegroup="procedural2d">
    <input name="valuetl" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valuetr" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valuebl" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="valuebr" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <splitlr>
    A left-right split matte, split at a specified u value.
  -->
  <nodedef name="ND_splitlr_float" node="splitlr" nodegroup="procedural2d">
    <input name="valuel" type="float" value="0.0" uiname="Left" />
    <input name="valuer" type="float" value="0.0" uiname="Right" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_splitlr_color3" node="splitlr" nodegroup="procedural2d">
    <input name="valuel" type="color3" value="0.0, 0.0, 0.0" uiname="Left" />
    <input name="valuer" type="color3" value="0.0, 0.0, 0.0" uiname="Right" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_splitlr_color4" node="splitlr" nodegroup="procedural2d">
    <input name="valuel" type="color4" value="0.0, 0.0, 0.0, 0.0" uiname="Left" />
    <input name="valuer" type="color4" value="0.0, 0.0, 0.0, 0.0" uiname="Right" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_splitlr_vector2" node="splitlr" nodegroup="procedural2d">
    <input name="valuel" type="vector2" value="0.0, 0.0" uiname="Left" />
    <input name="valuer" type="vector2" value="0.0, 0.0" uiname="Right" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_splitlr_vector3" node="splitlr" nodegroup="procedural2d">
    <input name="valuel" type="vector3" value="0.0, 0.0, 0.0" uiname="Left" />
    <input name="valuer" type="vector3" value="0.0, 0.0, 0.0" uiname="Right" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_splitlr_vector4" node="splitlr" nodegroup="procedural2d">
    <input name="valuel" type="vector4" value="0.0, 0.0, 0.0, 0.0" uiname="Left" />
    <input name="valuer" type="vector4" value="0.0, 0.0, 0.0, 0.0" uiname="Right" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <!--
    Node: <splittb>
    A top-bottom split matte, split at a specified v value.
  -->
  <nodedef name="ND_splittb_float" node="splittb" nodegroup="procedural2d">
    <input name="valuet" type="float" value="0.0" uiname="Top" />
    <input name="valueb" type="float" value="0.0" uiname="Bottom" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_splittb_color3" node="splittb" nodegroup="procedural2d">
    <input name="valuet" type="color3" value="0.0, 0.0, 0.0" uiname="Top" />
    <input name="valueb" type="color3" value="0.0, 0.0, 0.0" uiname="Bottom" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_splittb_color4" node="splittb" nodegroup="procedural2d">
    <input name="valuet" type="color4" value="0.0, 0.0, 0.0, 0.0" uiname="Top" />
    <input name="valueb" type="color4" value="0.0, 0.0, 0.0, 0.0" uiname="Bottom" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_splittb_vector2" node="splittb" nodegroup="procedural2d">
    <input name="valuet" type="vector2" value="0.0, 0.0" uiname="Top" />
    <input name="valueb" type="vector2" value="0.0, 0.0" uiname="Bottom" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_splittb_vector3" node="splittb" nodegroup="procedural2d">
    <input name="valuet" type="vector3" value="0.0, 0.0, 0.0" uiname="Top" />
    <input name="valueb" type="vector3" value="0.0, 0.0, 0.0" uiname="Bottom" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_splittb_vector4" node="splittb" nodegroup="procedural2d">
    <input name="valuet" type="vector4" value="0.0, 0.0, 0.0, 0.0" uiname="Top" />
    <input name="valueb" type="vector4" value="0.0, 0.0, 0.0, 0.0" uiname="Bottom" />
    <input name="center" type="float" value="0.5" uiname="Center" uimin="0.0" uimax="1.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <noise2d>
    2D Perlin noise in 1, 2, 3 or 4 channels.
  -->
  <nodedef name="ND_noise2d_float" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_color3" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_color4" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_vector2" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="vector2" value="1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_vector3" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_vector4" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_color3FA" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_color4FA" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_vector2FA" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_vector3FA" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise2d_vector4FA" node="noise2d" nodegroup="procedural2d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <noise3d>
    3D Perlin noise in 1, 2, 3 or 4 channels.
  -->
  <nodedef name="ND_noise3d_float" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_color3" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_color4" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_vector2" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector2" value="1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_vector3" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_vector4" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_color3FA" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_color4FA" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_vector2FA" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_vector3FA" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_noise3d_vector4FA" node="noise3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.0" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <fractal3d>
    3D Fractal noise in 1, 2, 3 or 4 channels.
  -->
  <nodedef name="ND_fractal3d_float" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_color3" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_color4" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_vector2" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector2" value="1.0, 1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_vector3" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_vector4" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_color3FA" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_color4FA" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_vector2FA" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_vector3FA" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_fractal3d_vector4FA" node="fractal3d" nodegroup="procedural3d">
    <input name="amplitude" type="float" value="1.0" />
    <input name="octaves" type="integer" value="3" />
    <input name="lacunarity" type="float" value="2.0" />
    <input name="diminish" type="float" value="0.5" />
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <cellnoise2d>
    2D cellular noise in 1 channel.
  -->
  <nodedef name="ND_cellnoise2d_float" node="cellnoise2d" nodegroup="procedural2d">
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>

  <!--
    Node: <cellnoise3d>
    3D cellular noise in 1 channel.
  -->
  <nodedef name="ND_cellnoise3d_float" node="cellnoise3d" nodegroup="procedural3d">
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <output name="out" type="float" default="0.0" />
  </nodedef>

  <!--
    Node: <worleynoise2d>
    2D Worley (voronoi) noise in 1, 2 or 3 channels.
  -->
  <nodedef name="ND_worleynoise2d_float" node="worleynoise2d" nodegroup="procedural2d">
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="jitter" type="float" value="1.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_worleynoise2d_vector2" node="worleynoise2d" nodegroup="procedural2d">
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="jitter" type="float" value="1.0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_worleynoise2d_vector3" node="worleynoise2d" nodegroup="procedural2d">
    <input name="texcoord" type="vector2" defaultgeomprop="UV0" />
    <input name="jitter" type="float" value="1.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <worleynoise3d>
    3D Worley (voronoi) noise in 1, 2 or 3 channels.
  -->
  <nodedef name="ND_worleynoise3d_float" node="worleynoise3d" nodegroup="procedural3d">
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="jitter" type="float" value="1.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_worleynoise3d_vector2" node="worleynoise3d" nodegroup="procedural3d">
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="jitter" type="float" value="1.0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_worleynoise3d_vector3" node="worleynoise3d" nodegroup="procedural3d">
    <input name="position" type="vector3" defaultgeomprop="Pobject" />
    <input name="jitter" type="float" value="1.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Geometric nodes                                                          -->
  <!-- ======================================================================== -->

  <!--
    Node: <position>
    The geometric position associated with the currently processed data,
    as defined in a specific coordinate space.
  -->
  <nodedef name="ND_position_vector3" node="position" nodegroup="geometric">
    <input name="space" type="string" value="object" enum="model,object,world" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <normal>
    The geometric normal associated with the currently processed data,
    as defined in a specific coordinate space.
  -->
  <nodedef name="ND_normal_vector3" node="normal" nodegroup="geometric">
    <input name="space" type="string" value="object" enum="model,object,world" uniform="true" />
    <output name="out" type="vector3" default="0.0, 1.0, 0.0" />
  </nodedef>

  <!--
    Node: <tangent>
    The geometric tangent vector associated with the currently processed data,
    as defined in a specific coordinate space.
  -->
  <nodedef name="ND_tangent_vector3" node="tangent" nodegroup="geometric">
    <input name="space" type="string" value="object" enum="model,object,world" uniform="true" />
    <input name="index" type="integer" value="0" uniform="true" />
    <output name="out" type="vector3" default="1.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <bitangent>
    The geometric bitangent vector associated with the currently processed data,
    as defined in a specific coordinate space.
  -->
  <nodedef name="ND_bitangent_vector3" node="bitangent" nodegroup="geometric">
    <input name="space" type="string" value="object" enum="model,object,world" uniform="true" />
    <input name="index" type="integer" value="0" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 1.0" />
  </nodedef>

  <!--
    Node: <texcoord>
    The full 2D or 3D texture coordinates associated with the currently processed data.
  -->
  <nodedef name="ND_texcoord_vector2" node="texcoord" nodegroup="geometric">
    <input name="index" type="integer" value="0" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_texcoord_vector3" node="texcoord" nodegroup="geometric">
    <input name="index" type="integer" value="0" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <geomcolor>
    The color associated with the current geometry at the current position, generally
    bound via per-vertex color values.
  -->
  <nodedef name="ND_geomcolor_float" node="geomcolor" nodegroup="geometric">
    <input name="index" type="integer" value="0" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_geomcolor_color3" node="geomcolor" nodegroup="geometric">
    <input name="index" type="integer" value="0" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_geomcolor_color4" node="geomcolor" nodegroup="geometric">
    <input name="index" type="integer" value="0" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <geompropvalue>
    The value of the specified geometric property for the current geometry.
  -->
  <nodedef name="ND_geompropvalue_integer" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="integer" value="0" />
    <output name="out" type="integer" default="0" />
  </nodedef>
  <nodedef name="ND_geompropvalue_boolean" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="boolean" value="false" />
    <output name="out" type="boolean" default="false" />
  </nodedef>
  <nodedef name="ND_geompropvalue_string" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="string" value="" uniform="true" />
    <output name="out" type="string" default="" />
  </nodedef>
  <nodedef name="ND_geompropvalue_float" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="float" value="0.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_geompropvalue_color3" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_geompropvalue_color4" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_geompropvalue_vector2" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_geompropvalue_vector3" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_geompropvalue_vector4" node="geompropvalue" nodegroup="geometric">
    <input name="geomprop" type="string" value="" uniform="true" />
    <input name="default" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Global nodes                                                             -->
  <!-- ======================================================================== -->

  <!--
    Node: <ambientocclusion>
    Computes the ambient occlusion (0-1 float) at the current surface point.  Larger
    values represent greater accessibility to ambient light, 0 means "fully occluded".
  -->
  <nodedef name="ND_ambientocclusion_float" node="ambientocclusion" nodegroup="global">
    <input name="coneangle" type="float" value="90.0" unittype="angle" unit="degree" />
    <input name="maxdistance" type="float" value="1e38" />
    <output name="out" type="float" default="1.0" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Application nodes                                                        -->
  <!-- ======================================================================== -->

  <!--
    Node: <frame>
    The current frame number as defined by the host environment.
  -->
  <nodedef name="ND_frame_float" node="frame" nodegroup="application">
    <output name="out" type="float" default="1.0" />
  </nodedef>

  <!--
    Node: <time>
    The current time in seconds as defined by the host environment.
    (Default values is 1/24.0)
  -->
  <nodedef name="ND_time_float" node="time" nodegroup="application">
    <input name="fps" type="float" value="24.0" />
    <output name="out" type="float" default="0.041666667" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Math nodes                                                               -->
  <!-- ======================================================================== -->

  <!--
    Node: <add>
    Add "in2" value/stream to the incoming float/color/vector/matrix.
  -->
  <nodedef name="ND_add_float" node="add" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_color3" node="add" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_color4" node="add" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_vector2" node="add" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_vector3" node="add" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_vector4" node="add" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_matrix33" node="add" nodegroup="math">
    <input name="in1" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <input name="in2" type="matrix33" value="0.0,0.0,0.0, 0.0,0.0,0.0, 0.0,0.0,0.0" />
    <output name="out" type="matrix33" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_matrix44" node="add" nodegroup="math">
    <input name="in1" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <input name="in2" type="matrix44" value="0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0" />
    <output name="out" type="matrix44" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_surfaceshader" node="add" nodegroup="math">
    <input name="in1" type="surfaceshader" value="" />
    <input name="in2" type="surfaceshader" value="" />
    <output name="out" type="surfaceshader" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_displacementshader" node="add" nodegroup="math">
    <input name="in1" type="displacementshader" value="" />
    <input name="in2" type="displacementshader" value="" />
    <output name="out" type="displacementshader" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_volumeshader" node="add" nodegroup="math">
    <input name="in1" type="volumeshader" value="" />
    <input name="in2" type="volumeshader" value="" />
    <output name="out" type="volumeshader" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_color3FA" node="add" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_color4FA" node="add" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_vector2FA" node="add" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_vector3FA" node="add" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_vector4FA" node="add" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_matrix33FA" node="add" nodegroup="math">
    <input name="in1" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="matrix33" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_add_matrix44FA" node="add" nodegroup="math">
    <input name="in1" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="matrix44" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <subtract>
    Subtract "in2" value/stream from the incoming float/color/vector/matrix.
  -->
  <nodedef name="ND_subtract_float" node="subtract" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_color3" node="subtract" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_color4" node="subtract" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_vector2" node="subtract" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_vector3" node="subtract" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_vector4" node="subtract" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_matrix33" node="subtract" nodegroup="math">
    <input name="in1" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <input name="in2" type="matrix33" value="0.0,0.0,0.0, 0.0,0.0,0.0, 0.0,0.0,0.0" />
    <output name="out" type="matrix33" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_matrix44" node="subtract" nodegroup="math">
    <input name="in1" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <input name="in2" type="matrix44" value="0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0" />
    <output name="out" type="matrix44" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_color3FA" node="subtract" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_color4FA" node="subtract" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_vector2FA" node="subtract" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_vector3FA" node="subtract" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_vector4FA" node="subtract" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_matrix33FA" node="subtract" nodegroup="math">
    <input name="in1" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="matrix33" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_subtract_matrix44FA" node="subtract" nodegroup="math">
    <input name="in1" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="matrix44" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <multiply>
    Multiply the incoming float/color/vector by the "in2" value/stream, or multiply
    two matrices.
  -->
  <nodedef name="ND_multiply_float" node="multiply" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_color3" node="multiply" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_color4" node="multiply" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_vector2" node="multiply" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_vector3" node="multiply" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_vector4" node="multiply" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_matrix33" node="multiply" nodegroup="math">
    <input name="in1" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <input name="in2" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <output name="out" type="matrix33" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_matrix44" node="multiply" nodegroup="math">
    <input name="in1" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <input name="in2" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <output name="out" type="matrix44" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_color3FA" node="multiply" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_color4FA" node="multiply" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_vector2FA" node="multiply" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_vector3FA" node="multiply" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_vector4FA" node="multiply" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_surfaceshaderF" node="multiply" nodegroup="math">
    <input name="in1" type="surfaceshader" value="" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="surfaceshader" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_displacementshaderF" node="multiply" nodegroup="math">
    <input name="in1" type="displacementshader" value="" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="displacementshader" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_volumeshaderF" node="multiply" nodegroup="math">
    <input name="in1" type="volumeshader" value="" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="volumeshader" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_surfaceshaderC" node="multiply" nodegroup="math">
    <input name="in1" type="surfaceshader" value="" />
    <input name="in2" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="surfaceshader" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_volumeshaderC" node="multiply" nodegroup="math">
    <input name="in1" type="volumeshader" value="" />
    <input name="in2" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="volumeshader" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_multiply_displacementshaderV" node="multiply" nodegroup="math">
    <input name="in1" type="displacementshader" value="" />
    <input name="in2" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="displacementshader" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <divide>
    Divide an incoming float/color/vector by the "in2" value/stream; dividing a channel
    value by 0 results in floating-point "NaN".  Or, multiply one matrix by the
    inverse of a second matrix.
  -->
  <nodedef name="ND_divide_float" node="divide" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_color3" node="divide" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_color4" node="divide" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_vector2" node="divide" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_vector3" node="divide" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_vector4" node="divide" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_matrix33" node="divide" nodegroup="math">
    <input name="in1" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <input name="in2" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <output name="out" type="matrix33" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_matrix44" node="divide" nodegroup="math">
    <input name="in1" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <input name="in2" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <output name="out" type="matrix44" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_color3FA" node="divide" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_color4FA" node="divide" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_vector2FA" node="divide" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_vector3FA" node="divide" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_divide_vector4FA" node="divide" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <modulo>
    The remaining fraction after dividing one float/color/vector by another and
    subtracting the integer portion. The modula "in2" value cannot be 0.
  -->
  <nodedef name="ND_modulo_float" node="modulo" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_color3" node="modulo" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_color4" node="modulo" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_vector2" node="modulo" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_vector3" node="modulo" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_vector4" node="modulo" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_color3FA" node="modulo" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_color4FA" node="modulo" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_vector2FA" node="modulo" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_vector3FA" node="modulo" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_modulo_vector4FA" node="modulo" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <invert>
    Subtract the incoming float/color/vector from "amount" in all channels,
    outputting: amount - in.
  -->
  <nodedef name="ND_invert_float" node="invert" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <input name="amount" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_color3" node="invert" nodegroup="math">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_color4" node="invert" nodegroup="math">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_vector2" node="invert" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="amount" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_vector3" node="invert" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_vector4" node="invert" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_color3FA" node="invert" nodegroup="math">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_color4FA" node="invert" nodegroup="math">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_vector2FA" node="invert" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_vector3FA" node="invert" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invert_vector4FA" node="invert" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <absval>
    The per-channel absolute value of the incoming float/color/vector.
  -->
  <nodedef name="ND_absval_float" node="absval" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_absval_color3" node="absval" nodegroup="math">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_absval_color4" node="absval" nodegroup="math">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_absval_vector2" node="absval" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_absval_vector3" node="absval" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_absval_vector4" node="absval" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <floor>
    Find the nearest integer less than or equal to the parameter.
  -->
  <nodedef name="ND_floor_float" node="floor" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_floor_color3" node="floor" nodegroup="math">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_floor_color4" node="floor" nodegroup="math">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_floor_vector2" node="floor" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_floor_vector3" node="floor" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_floor_vector4" node="floor" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <ceil>
    Find the nearest integer greater than or equal to the parameter.
  -->
  <nodedef name="ND_ceil_float" node="ceil" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ceil_color3" node="ceil" nodegroup="math">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ceil_color4" node="ceil" nodegroup="math">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ceil_vector2" node="ceil" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ceil_vector3" node="ceil" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ceil_vector4" node="ceil" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <power>
    Raise incoming float/color/vector values to the "in2" power.
  -->
  <nodedef name="ND_power_float" node="power" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_color3" node="power" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_color4" node="power" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_vector2" node="power" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_vector3" node="power" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_vector4" node="power" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_color3FA" node="power" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_color4FA" node="power" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_vector2FA" node="power" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_vector3FA" node="power" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_power_vector4FA" node="power" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Nodes: <sin>, <cos>, <tan>, <asin>, <acos>, <atan2>
    Standard trigonometric functions; angles are given in radians.
  -->
  <nodedef name="ND_sin_float" node="sin" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_cos_float" node="cos" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_tan_float" node="tan" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_asin_float" node="asin" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_acos_float" node="acos" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_atan2_float" node="atan2" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_sin_vector2" node="sin" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_cos_vector2" node="cos" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_tan_vector2" node="tan" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_asin_vector2" node="asin" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_acos_vector2" node="acos" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_atan2_vector2" node="atan2" nodegroup="math">
    <input name="in1" type="vector2" value="1.0, 1.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_sin_vector3" node="sin" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_cos_vector3" node="cos" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_tan_vector3" node="tan" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_asin_vector3" node="asin" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_acos_vector3" node="acos" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_atan2_vector3" node="atan2" nodegroup="math">
    <input name="in1" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_sin_vector4" node="sin" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_cos_vector4" node="cos" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_tan_vector4" node="tan" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_asin_vector4" node="asin" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_acos_vector4" node="acos" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_atan2_vector4" node="atan2" nodegroup="math">
    <input name="in1" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Nodes: <sqrt>, <ln>, <exp>
    Standard math functions.
  -->
  <nodedef name="ND_sqrt_float" node="sqrt" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ln_float" node="ln" nodegroup="math">
    <input name="in" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_exp_float" node="exp" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_sqrt_vector2" node="sqrt" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ln_vector2" node="ln" nodegroup="math">
    <input name="in" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_exp_vector2" node="exp" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_sqrt_vector3" node="sqrt" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ln_vector3" node="ln" nodegroup="math">
    <input name="in" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_exp_vector3" node="exp" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_sqrt_vector4" node="sqrt" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_ln_vector4" node="ln" nodegroup="math">
    <input name="in" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_exp_vector4" node="exp" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <sign>
    Sign of eachinput channel: -1, 0 or +1
  -->
  <nodedef name="ND_sign_float" node="sign" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_sign_color3" node="sign" nodegroup="math">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_sign_color4" node="sign" nodegroup="math">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_sign_vector2" node="sign" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_sign_vector3" node="sign" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_sign_vector4" node="sign" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <clamp>
    Clamp incoming value to a specified range of values.
  -->
  <nodedef name="ND_clamp_float" node="clamp" nodegroup="math">
    <input name="in" type="float" value="0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_color3" node="clamp" nodegroup="math">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="low" type="color3" value="0.0, 0.0, 0.0" />
    <input name="high" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_color4" node="clamp" nodegroup="math">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="low" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="high" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_vector2" node="clamp" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="low" type="vector2" value="0.0, 0.0" />
    <input name="high" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_vector3" node="clamp" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="low" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="high" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_vector4" node="clamp" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="low" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="high" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_color3FA" node="clamp" nodegroup="math">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_color4FA" node="clamp" nodegroup="math">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_vector2FA" node="clamp" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_vector3FA" node="clamp" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_clamp_vector4FA" node="clamp" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <min>
    Select the minimum among incoming values.
  -->
  <nodedef name="ND_min_float" node="min" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_color3" node="min" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_color4" node="min" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_vector2" node="min" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_vector3" node="min" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_vector4" node="min" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_color3FA" node="min" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_color4FA" node="min" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_vector2FA" node="min" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_vector3FA" node="min" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_min_vector4FA" node="min" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <max>
    Select the maximum among incoming values.
  -->
  <nodedef name="ND_max_float" node="max" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_color3" node="max" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_color4" node="max" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_vector2" node="max" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_vector3" node="max" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_vector4" node="max" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_color3FA" node="max" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_color4FA" node="max" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_vector2FA" node="max" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_vector3FA" node="max" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_max_vector4FA" node="max" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <normalize>
    Outputs the normalized vector from the incoming vector stream.
  -->
  <nodedef name="ND_normalize_vector2" node="normalize" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_normalize_vector3" node="normalize" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_normalize_vector4" node="normalize" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <magnitude>
    Outputs the float magnitude (vector length) of the incoming vector stream.
  -->
  <nodedef name="ND_magnitude_vector2" node="magnitude" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_magnitude_vector3" node="magnitude" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_magnitude_vector4" node="magnitude" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>

  <!--
    Node: <dotproduct>
    Perform a dot product of two 2-4 channel vectors
  -->
  <nodedef name="ND_dotproduct_vector2" node="dotproduct" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_dotproduct_vector3" node="dotproduct" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_dotproduct_vector4" node="dotproduct" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>

  <!--
    Node: <crossproduct>
    Perform a cross product of two vectors
  -->
  <nodedef name="ND_crossproduct_vector3" node="crossproduct" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <transformpoint>
    Transform a vector3 coordinate from one named space to another.
  -->
  <nodedef name="ND_transformpoint_vector3" node="transformpoint" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="fromspace" type="string" value="" uniform="true" />
    <input name="tospace" type="string" value="" uniform="true" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>

  <!--
    Node: <transformvector>
    Transform a vector from one named space to another.
  -->
  <nodedef name="ND_transformvector_vector3" node="transformvector" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="fromspace" type="string" value="" uniform="true" />
    <input name="tospace" type="string" value="" uniform="true" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <!--
    Node: <transformnormal>
    Transform a normal vector from one named space to another.
  -->
  <nodedef name="ND_transformnormal_vector3" node="transformnormal" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 1.0" />
    <input name="fromspace" type="string" value="" uniform="true" />
    <input name="tospace" type="string" value="" uniform="true" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>

  <!--
    Node: <transformmatrix>
    Transform a vector by a matrix.
  -->
  <nodedef name="ND_transformmatrix_vector2M3" node="transformmatrix" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="mat" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_transformmatrix_vector3" node="transformmatrix" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="mat" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_transformmatrix_vector3M4" node="transformmatrix" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="mat" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_transformmatrix_vector4" node="transformmatrix" nodegroup="math">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mat" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <normalmap>
    Transform a normal vector from object or tangent space into "world" space.
  -->
  <nodedef name="ND_normalmap" node="normalmap" nodegroup="math">
    <input name="in" type="vector3" value="0.5, 0.5, 1.0" />
    <input name="space" type="string" value="tangent" enum="tangent, object" uniform="true" />
    <input name="scale" type="float" value="1.0" />
    <input name="normal" type="vector3" defaultgeomprop="Nworld" />
    <input name="tangent" type="vector3" defaultgeomprop="Tworld" />
    <output name="out" type="vector3" defaultinput="normal" />
  </nodedef>

  <!--
    Node: <transpose>
    Output the transpose of the incoming matrix.
  -->
  <nodedef name="ND_transpose_matrix33" node="transpose" nodegroup="math">
    <input name="in" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <output name="out" type="matrix33" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_transpose_matrix44" node="transpose" nodegroup="math">
    <input name="in" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <output name="out" type="matrix44" defaultinput="in" />
  </nodedef>

  <!--
    Node: <determinant>
    Output the determinant of the incoming matrix.
  -->
  <nodedef name="ND_determinant_matrix33" node="determinant" nodegroup="math">
    <input name="in" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <output name="out" type="float" default="1.0" />
  </nodedef>
  <nodedef name="ND_determinant_matrix44" node="determinant" nodegroup="math">
    <input name="in" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <output name="out" type="float" default="1.0" />
  </nodedef>

  <!--
    Node: <invertmatrix>
    Invert an incoming matrix.
  -->
  <nodedef name="ND_invertmatrix_matrix33" node="invertmatrix" nodegroup="math">
    <input name="in" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <output name="out" type="matrix33" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_invertmatrix_matrix44" node="invertmatrix" nodegroup="math">
    <input name="in" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <output name="out" type="matrix44" defaultinput="in" />
  </nodedef>

  <!--
    Node: <rotate2d>
    Rotate a vector2 value about the origin.
  -->
  <nodedef name="ND_rotate2d_vector2" node="rotate2d" nodegroup="math">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="amount" type="float" value="0.0" unittype="angle" unit="degree" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>

  <!--
    Node: <rotate3d>
    Rotate a vector3 value about a specified unit axis vector
  -->
  <nodedef name="ND_rotate3d_vector3" node="rotate3d" nodegroup="math">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="0.0" unittype="angle" unit="degree" />
    <input name="axis" type="vector3" value="0.0, 1.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>

  <!--
    Node: <place2d> Supplemental Node
    Transform incoming UV texture coordinates for 2D texture placement.
  -->
  <nodedef name="ND_place2d_vector2" node="place2d" nodegroup="math">
    <input name="texcoord" type="vector2" value="0.0, 0.0" />
    <input name="pivot" type="vector2" value="0.0,0.0" />
    <input name="scale" type="vector2" value="1.0,1.0" />
    <input name="rotate" type="float" value="0.0" unittype="angle" unit="degree" />
    <input name="offset" type="vector2" value="0.0,0.0" />
    <output name="out" type="vector2" defaultinput="texcoord" />
  </nodedef>

  <!--
    Node: <arrayappend>
    Creates a two-element array from two base types, or appends a base-type value to an array of
    the same type.
  -->
  <nodedef name="ND_arrayappend_integer_integerarray" node="arrayappend" nodegroup="math">
    <input name="in1" type="integer" value="0" />
    <input name="in2" type="integer" value="0" />
    <output name="out" type="integerarray" default="[]" />
  </nodedef>
  <nodedef name="ND_arrayappend_integerarray_integerarray" node="arrayappend" nodegroup="math">
    <input name="in1" type="integerarray" value="" />
    <input name="in2" type="integer" value="0" />
    <output name="out" type="integerarray" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_arrayappend_float_floatarray" node="arrayappend" nodegroup="math">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="floatarray" default="[]" />
  </nodedef>
  <nodedef name="ND_arrayappend_floatarray_floatarray" node="arrayappend" nodegroup="math">
    <input name="in1" type="floatarray" value="" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="floatarray" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_arrayappend_color3_color3array" node="arrayappend" nodegroup="math">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3array" default="[]" />
  </nodedef>
  <nodedef name="ND_arrayappend_color3array_color3array" node="arrayappend" nodegroup="math">
    <input name="in1" type="color3array" value="" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3array" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_arrayappend_color4_color4array" node="arrayappend" nodegroup="math">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4array" default="[]" />
  </nodedef>
  <nodedef name="ND_arrayappend_color4array_color4array" node="arrayappend" nodegroup="math">
    <input name="in1" type="color4array" value="" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4array" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_arrayappend_vector2_vector2array" node="arrayappend" nodegroup="math">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2array" default="[]" />
  </nodedef>
  <nodedef name="ND_arrayappend_vector2array_vector2array" node="arrayappend" nodegroup="math">
    <input name="in1" type="vector2array" value="" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2array" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_arrayappend_vector3_vector3array" node="arrayappend" nodegroup="math">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3array" default="[]" />
  </nodedef>
  <nodedef name="ND_arrayappend_vector3array_vector3array" node="arrayappend" nodegroup="math">
    <input name="in1" type="vector3array" value="" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3array" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_arrayappend_vector4_vector4array" node="arrayappend" nodegroup="math">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4array" default="[]" />
  </nodedef>
  <nodedef name="ND_arrayappend_vector4array_vector4array" node="arrayappend" nodegroup="math">
    <input name="in1" type="vector4array" value="" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4array" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_arrayappend_string_stringarray" node="arrayappend" nodegroup="math">
    <input name="in1" type="string" value="" />
    <input name="in2" type="string" value="" />
    <output name="out" type="stringarray" default="[]" />
  </nodedef>
  <nodedef name="ND_arrayappend_stringarray_stringarray" node="arrayappend" nodegroup="math">
    <input name="in1" type="stringarray" value="" />
    <input name="in2" type="string" value="" />
    <output name="out" type="stringarray" defaultinput="in1" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Adjustment nodes                                                         -->
  <!-- ======================================================================== -->

  <!--
    Node: <remap>
    Remap a value from one range of float/color/vector values to another.
  -->
  <nodedef name="ND_remap_float" node="remap" nodegroup="adjustment">
    <input name="in" type="float" value="0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_color3" node="remap" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="inlow" type="color3" value="0.0, 0.0, 0.0" />
    <input name="inhigh" type="color3" value="1.0, 1.0, 1.0" />
    <input name="outlow" type="color3" value="0.0, 0.0, 0.0" />
    <input name="outhigh" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_color4" node="remap" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inlow" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inhigh" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="outlow" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="outhigh" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_vector2" node="remap" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="inlow" type="vector2" value="0.0, 0.0" />
    <input name="inhigh" type="vector2" value="1.0, 1.0" />
    <input name="outlow" type="vector2" value="0.0, 0.0" />
    <input name="outhigh" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_vector3" node="remap" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="inlow" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="inhigh" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="outlow" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="outhigh" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_vector4" node="remap" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inlow" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inhigh" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="outlow" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="outhigh" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_color3FA" node="remap" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_color4FA" node="remap" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_vector2FA" node="remap" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_vector3FA" node="remap" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_remap_vector4FA" node="remap" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <smoothstep>
    Outputs a smooth (hermite-interpolated) remapping of input values from low-high
    to output 0-1.
  -->
  <nodedef name="ND_smoothstep_float" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="float" value="0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_color3" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="low" type="color3" value="0.0, 0.0, 0.0" />
    <input name="high" type="color3" value="1.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_color4" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="low" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="high" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_vector2" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="low" type="vector2" value="0.0, 0.0" />
    <input name="high" type="vector2" value="1.0, 1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_vector3" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="low" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="high" type="vector3" value="1.0, 1.0, 1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_vector4" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="low" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="high" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_color3FA" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_color4FA" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_vector2FA" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_vector3FA" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_smoothstep_vector4FA" node="smoothstep" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="low" type="float" value="0.0" />
    <input name="high" type="float" value="1.0" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <curveadjust>
    Outputs a smooth remapping of input values using the centripetal Catmull-Rom
    cubic spline curve defined by specified knot values, using an inverse spline
    lookup on input knot values and a forward spline through output knot values.
    All channels of the input will be remapped using the same curve.
  -->
  <nodedef name="ND_curveadjust_float" node="curveadjust" nodegroup="adjustment">
    <input name="in" type="float" value="0.0" />
    <input name="knots" type="vector2array" value="" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_curveadjust_color3" node="curveadjust" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="knots" type="vector2array" value="" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_curveadjust_color4" node="curveadjust" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="knots" type="vector2array" value="" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_curveadjust_vector2" node="curveadjust" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="knots" type="vector2array" value="" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_curveadjust_vector3" node="curveadjust" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="knots" type="vector2array" value="" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_curveadjust_vector4" node="curveadjust" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="knots" type="vector2array" value="" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <luminance>
    Output a grayscale image containing the luminance of the incoming RGB color in all color channels;
    the alpha channel is left unchanged if present.
  -->
  <nodedef name="ND_luminance_color3" node="luminance" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="lumacoeffs" type="color3" value="0.2722287, 0.6740818, 0.0536895" enum="acescg, rec709, rec2020, rec2100" enumvalues="0.2722287,0.6740818,0.0536895, 0.2126,0.7152,0.0722, 0.2627,0.6780,0.0593, 0.2627,0.6780,0.0593" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_luminance_color4" node="luminance" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="lumacoeffs" type="color3" value="0.2722287, 0.6740818, 0.0536895" enum="acescg, rec709, rec2020, rec2100" enumvalues="0.2722287,0.6740818,0.0536895, 0.2126,0.7152,0.0722, 0.2627,0.6780,0.0593, 0.2627,0.6780,0.0593" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>

  <!--
    Nodes: <rgbtohsv> and <hsvtorgb>
    Convert an incoming color between RGB and HSV space, with H and S ranging from 0-1.
  -->
  <nodedef name="ND_rgbtohsv_color3" node="rgbtohsv" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_rgbtohsv_color4" node="rgbtohsv" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_hsvtorgb_color3" node="hsvtorgb" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_hsvtorgb_color4" node="hsvtorgb" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <contrast> Supplemental Node
    Increase or decrease contrast of a float/color value using a linear slope multiplier.
  -->
  <nodedef name="ND_contrast_float" node="contrast" nodegroup="adjustment">
    <input name="in" type="float" value="0.0" />
    <input name="amount" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.5" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_color3" node="contrast" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="color3" value="1.0, 1.0, 1.0" />
    <input name="pivot" type="color3" value="0.5, 0.5, 0.5" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_color4" node="contrast" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="pivot" type="color4" value="0.5, 0.5, 0.5, 0.5" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_vector2" node="contrast" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="amount" type="vector2" value="1.0, 1.0" />
    <input name="pivot" type="vector2" value="0.5, 0.5" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_vector3" node="contrast" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="pivot" type="vector3" value="0.5, 0.5, 0.5" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_vector4" node="contrast" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="pivot" type="vector4" value="0.5, 0.5, 0.5, 0.5" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_color3FA" node="contrast" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.5" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_color4FA" node="contrast" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.5" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_vector2FA" node="contrast" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.5" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_vector3FA" node="contrast" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.5" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_contrast_vector4FA" node="contrast" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <input name="pivot" type="float" value="0.5" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <range> Supplemental Node
    Remap a value from one range of float/color/vector values to another, optionally
    applying a gamma correction in the middle, and optionally clamping output values.
  -->
  <nodedef name="ND_range_float" node="range" nodegroup="adjustment">
    <input name="in" type="float" value="0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="gamma" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_color3" node="range" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="inlow" type="color3" value="0.0, 0.0, 0.0" />
    <input name="inhigh" type="color3" value="1.0, 1.0, 1.0" />
    <input name="gamma" type="color3" value="1.0, 1.0, 1.0" />
    <input name="outlow" type="color3" value="0.0, 0.0, 0.0" />
    <input name="outhigh" type="color3" value="1.0, 1.0, 1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_color4" node="range" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inlow" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inhigh" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="gamma" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="outlow" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="outhigh" type="color4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_vector2" node="range" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="inlow" type="vector2" value="0.0, 0.0" />
    <input name="inhigh" type="vector2" value="1.0, 1.0" />
    <input name="gamma" type="vector2" value="1.0, 1.0" />
    <input name="outlow" type="vector2" value="0.0, 0.0" />
    <input name="outhigh" type="vector2" value="1.0, 1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_vector3" node="range" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="inlow" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="inhigh" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="gamma" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="outlow" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="outhigh" type="vector3" value="1.0, 1.0, 1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_vector4" node="range" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inlow" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inhigh" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="gamma" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="outlow" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="outhigh" type="vector4" value="1.0, 1.0, 1.0, 1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_color3FA" node="range" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="gamma" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_color4FA" node="range" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="gamma" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_vector2FA" node="range" nodegroup="adjustment">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="gamma" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_vector3FA" node="range" nodegroup="adjustment">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="gamma" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_range_vector4FA" node="range" nodegroup="adjustment">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="inlow" type="float" value="0.0" />
    <input name="inhigh" type="float" value="1.0" />
    <input name="gamma" type="float" value="1.0" />
    <input name="outlow" type="float" value="0.0" />
    <input name="outhigh" type="float" value="1.0" />
    <input name="doclamp" type="boolean" value="false" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <hsvadjust> Supplemental Node
    Adjust the hue, saturation and value of an RGB color by converting the input color
    to HSV, adding amount.x to the hue, multiplying the saturation by amount.y,
    multiplying the value by amount.z, then converting back to RGB.
  -->
  <nodedef name="ND_hsvadjust_color3" node="hsvadjust" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="vector3" value="0.0, 1.0, 1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_hsvadjust_color4" node="hsvadjust" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="vector3" value="0.0, 1.0, 1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <saturate> Supplemental Node
    Adjust the saturation of a color using a linear interpolation between the incoming
    color and the grayscale luminance of the input computed using the provided luma
    coefficients; the alpha channel will be unchanged if present.
  -->
  <nodedef name="ND_saturate_color3" node="saturate" nodegroup="adjustment">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <input name="lumacoeffs" type="color3" value="0.2722287, 0.6740818, 0.0536895" enum="acescg, rec709, rec2020, rec2100" enumvalues="0.2722287,0.6740818,0.0536895, 0.2126,0.7152,0.0722, 0.2627,0.6780,0.0593, 0.2627,0.6780,0.0593" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_saturate_color4" node="saturate" nodegroup="adjustment">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="amount" type="float" value="1.0" />
    <input name="lumacoeffs" type="color3" value="0.2722287, 0.6740818, 0.0536895" enum="acescg, rec709, rec2020, rec2100" enumvalues="0.2722287,0.6740818,0.0536895, 0.2126,0.7152,0.0722, 0.2627,0.6780,0.0593, 0.2627,0.6780,0.0593" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Compositing nodes                                                        -->
  <!-- ======================================================================== -->

  <!--
    Node: <premult>
    Multiply the R or RGB channels of the input by the Alpha channel of the input.
  -->
  <nodedef name="ND_premult_color4" node="premult" nodegroup="compositing">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <unpremult>
    Divide the R or RGB channels of the input by the Alpha channel of the input.
    If the Alpha value is zero, it is passed through unchanged.
  -->
  <nodedef name="ND_unpremult_color4" node="unpremult" nodegroup="compositing">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <plus>
    Add two 1-4 channel inputs, with optional mixing between the bg input and the result.
  -->
  <nodedef name="ND_plus_float" node="plus" nodegroup="compositing">
    <input name="fg" type="float" value="0.0" />
    <input name="bg" type="float" value="0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_plus_color3" node="plus" nodegroup="compositing">
    <input name="fg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_plus_color4" node="plus" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <minus>
    Subtract two 1-4 channel inputs, with optional mixing between the bg input and the result.
  -->
  <nodedef name="ND_minus_float" node="minus" nodegroup="compositing">
    <input name="fg" type="float" value="0.0" />
    <input name="bg" type="float" value="0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_minus_color3" node="minus" nodegroup="compositing">
    <input name="fg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_minus_color4" node="minus" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <difference>
    Absolute-value difference of two 1-4 channel inputs, with optional mixing between
    the bg input and the result.
  -->
  <nodedef name="ND_difference_float" node="difference" nodegroup="compositing">
    <input name="fg" type="float" value="0.0" />
    <input name="bg" type="float" value="0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_difference_color3" node="difference" nodegroup="compositing">
    <input name="fg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_difference_color4" node="difference" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <burn>
    Take two 1-4 channel inputs and apply the same operator to all channels: 1-(1-B)/F
  -->
  <nodedef name="ND_burn_float" node="burn" nodegroup="compositing">
    <input name="fg" type="float" value="0.0" />
    <input name="bg" type="float" value="0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_burn_color3" node="burn" nodegroup="compositing">
    <input name="fg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_burn_color4" node="burn" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <dodge>
    Take two 1-4 channel inputs and apply the same operator to all channels: B/(1-F)
  -->
  <nodedef name="ND_dodge_float" node="dodge" nodegroup="compositing">
    <input name="fg" type="float" value="0.0" />
    <input name="bg" type="float" value="0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_dodge_color3" node="dodge" nodegroup="compositing">
    <input name="fg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_dodge_color4" node="dodge" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <screen>
    Take two 1-4 channel inputs and apply the same operator to all channels: 1-(1-F)*(1-B)
  -->
  <nodedef name="ND_screen_float" node="screen" nodegroup="compositing">
    <input name="fg" type="float" value="0.0" />
    <input name="bg" type="float" value="0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_screen_color3" node="screen" nodegroup="compositing">
    <input name="fg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_screen_color4" node="screen" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <overlay>
    Take two 1-4 channel inputs and apply the same operator to all channels:
      2FB if F<0.5;
      1-(1-F)(1-B) if F>=0.5
  -->
  <nodedef name="ND_overlay_float" node="overlay" nodegroup="compositing">
    <input name="fg" type="float" value="0.0" />
    <input name="bg" type="float" value="0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_overlay_color3" node="overlay" nodegroup="compositing">
    <input name="fg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_overlay_color4" node="overlay" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <disjointover>
    Take two color4 inputs and use the built-in alpha
    channel(s) to control the compositing of the fg and bg inputs:
      F+B         if f+b<=1
      F+B(1-f)/b  if f+b>1
      alpha: min(f+b,1)
  -->
  <nodedef name="ND_disjointover_color4" node="disjointover" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <in>
    Take two color4 inputs and use the built-in alpha
    channel(s) to control the compositing of the fg and bg inputs: Fb  (alpha: fb)
  -->
  <nodedef name="ND_in_color4" node="in" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <mask>
    Take two color4 inputs and use the built-in alpha
    channel(s) to control the compositing of the fg and bg inputs: Bf  (alpha: bf)
  -->
  <nodedef name="ND_mask_color4" node="mask" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <matte>
    Take two color4 inputs and use the built-in alpha
    channel(s) to control the compositing of the fg and bg inputs: Ff+B(1-f)  (alpha: f+b(1-f))
  -->
  <nodedef name="ND_matte_color4" node="matte" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <out>
    Take two color4 inputs and use the built-in alpha
    channel(s) to control the compositing of the fg and bg inputs: F(1-b)  (alpha: f(1-b))
  -->
  <nodedef name="ND_out_color4" node="out" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <over>
    Take two color4 inputs and use the built-in alpha
    channel(s) to control the compositing of the fg and bg inputs: F+B(1-f)  (alpha: f+b(1-f))
  -->
  <nodedef name="ND_over_color4" node="over" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>

  <!--
    Node: <inside>
    Take one 1-4 channel input "in" plus a separate float "mask" input and apply the same
    operator to all channels: in * mask
  -->
  <nodedef name="ND_inside_float" node="inside" nodegroup="compositing">
    <input name="in" type="float" value="0.0" />
    <input name="mask" type="float" value="1.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_inside_color3" node="inside" nodegroup="compositing">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mask" type="float" value="1.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_inside_color4" node="inside" nodegroup="compositing">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mask" type="float" value="1.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <outside>
    Take one 1-4 channel input "in" plus a separate float "mask" input and apply the same
    operator to all channels: in * (1-mask)
  -->
  <nodedef name="ND_outside_float" node="outside" nodegroup="compositing">
    <input name="in" type="float" value="0.0" />
    <input name="mask" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_outside_color3" node="outside" nodegroup="compositing">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mask" type="float" value="0.0" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_outside_color4" node="outside" nodegroup="compositing">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mask" type="float" value="0.0" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <mix>
    Mix two inputs according to an input mix amount.
  -->
  <nodedef name="ND_mix_float" node="mix" nodegroup="compositing">
    <input name="fg" type="float" value="0.0" />
    <input name="bg" type="float" value="0.0" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_mix_color3" node="mix" nodegroup="compositing">
    <input name="fg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="color3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="color3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_mix_color4" node="mix" nodegroup="compositing">
    <input name="fg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="color4" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_mix_vector2" node="mix" nodegroup="compositing">
    <input name="fg" type="vector2" value="0.0, 0.0" />
    <input name="bg" type="vector2" value="0.0, 0.0" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="vector2" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_mix_vector3" node="mix" nodegroup="compositing">
    <input name="fg" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="bg" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="vector3" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_mix_vector4" node="mix" nodegroup="compositing">
    <input name="fg" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="bg" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="vector4" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_mix_surfaceshader" node="mix" nodegroup="compositing">
    <input name="fg" type="surfaceshader" value="" />
    <input name="bg" type="surfaceshader" value="" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="surfaceshader" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_mix_displacementshader" node="mix" nodegroup="compositing">
    <input name="fg" type="displacementshader" value="" />
    <input name="bg" type="displacementshader" value="" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="displacementshader" defaultinput="bg" />
  </nodedef>
  <nodedef name="ND_mix_volumeshader" node="mix" nodegroup="compositing">
    <input name="fg" type="volumeshader" value="" />
    <input name="bg" type="volumeshader" value="" />
    <input name="mix" type="float" value="0.0" />
    <output name="out" type="volumeshader" defaultinput="bg" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Conditional nodes                                                        -->
  <!-- ======================================================================== -->

  <!--
    Node: <ifgreater>
    Output the value of in1 if value1>value2, or the value of in2 if value1<=value2.
  -->
  <nodedef name="ND_ifgreater_float" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_color3" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_color4" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_vector2" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_vector3" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_vector4" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_floatI" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_color3I" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_color4I" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_vector2I" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_vector3I" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreater_vector4I" node="ifgreater" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <ifgreatereq>
    Output the value of in1 if value1>=value2, or the value of in2 if value1<value2.
  -->
  <nodedef name="ND_ifgreatereq_float" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_color3" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_color4" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_vector2" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_vector3" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_vector4" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="float" value="1.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_floatI" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_color3I" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_color4I" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_vector2I" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_vector3I" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifgreatereq_vector4I" node="ifgreatereq" nodegroup="conditional">
    <input name="value1" type="integer" value="1" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <ifequal>
    Output the value of in1 if value1==value2, or the value of in2 if value1!=value2.
  -->
  <nodedef name="ND_ifequal_float" node="ifequal" nodegroup="conditional">
    <input name="value1" type="float" value="0.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_color3" node="ifequal" nodegroup="conditional">
    <input name="value1" type="float" value="0.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_color4" node="ifequal" nodegroup="conditional">
    <input name="value1" type="float" value="0.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector2" node="ifequal" nodegroup="conditional">
    <input name="value1" type="float" value="0.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector3" node="ifequal" nodegroup="conditional">
    <input name="value1" type="float" value="0.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector4" node="ifequal" nodegroup="conditional">
    <input name="value1" type="float" value="0.0" />
    <input name="value2" type="float" value="0.0" />
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_floatI" node="ifequal" nodegroup="conditional">
    <input name="value1" type="integer" value="0" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_color3I" node="ifequal" nodegroup="conditional">
    <input name="value1" type="integer" value="0" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_color4I" node="ifequal" nodegroup="conditional">
    <input name="value1" type="integer" value="0" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector2I" node="ifequal" nodegroup="conditional">
    <input name="value1" type="integer" value="0" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector3I" node="ifequal" nodegroup="conditional">
    <input name="value1" type="integer" value="0" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector4I" node="ifequal" nodegroup="conditional">
    <input name="value1" type="integer" value="0" />
    <input name="value2" type="integer" value="0" />
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_floatB" node="ifequal" nodegroup="conditional">
    <input name="value1" type="boolean" value="false" />
    <input name="value2" type="boolean" value="false" />
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_color3B" node="ifequal" nodegroup="conditional">
    <input name="value1" type="boolean" value="false" />
    <input name="value2" type="boolean" value="false" />
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_color4B" node="ifequal" nodegroup="conditional">
    <input name="value1" type="boolean" value="false" />
    <input name="value2" type="boolean" value="false" />
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector2B" node="ifequal" nodegroup="conditional">
    <input name="value1" type="boolean" value="false" />
    <input name="value2" type="boolean" value="false" />
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector3B" node="ifequal" nodegroup="conditional">
    <input name="value1" type="boolean" value="false" />
    <input name="value2" type="boolean" value="false" />
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_ifequal_vector4B" node="ifequal" nodegroup="conditional">
    <input name="value1" type="boolean" value="false" />
    <input name="value2" type="boolean" value="false" />
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!--
    Node: <switch>
    Pass on the value of one of five input streams, according to the value of a selector parameter.
  -->
  <nodedef name="ND_switch_float" node="switch" nodegroup="conditional">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <input name="in3" type="float" value="0.0" />
    <input name="in4" type="float" value="0.0" />
    <input name="in5" type="float" value="0.0" />
    <input name="which" type="float" value="0.0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_color3" node="switch" nodegroup="conditional">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in3" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in4" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in5" type="color3" value="0.0, 0.0, 0.0" />
    <input name="which" type="float" value="0.0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_color4" node="switch" nodegroup="conditional">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in3" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in4" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in5" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="which" type="float" value="0.0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_vector2" node="switch" nodegroup="conditional">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <input name="in3" type="vector2" value="0.0, 0.0" />
    <input name="in4" type="vector2" value="0.0, 0.0" />
    <input name="in5" type="vector2" value="0.0, 0.0" />
    <input name="which" type="float" value="0.0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_vector3" node="switch" nodegroup="conditional">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in3" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in4" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in5" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="which" type="float" value="0.0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_vector4" node="switch" nodegroup="conditional">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in3" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in4" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in5" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="which" type="float" value="0.0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_floatI" node="switch" nodegroup="conditional">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <input name="in3" type="float" value="0.0" />
    <input name="in4" type="float" value="0.0" />
    <input name="in5" type="float" value="0.0" />
    <input name="which" type="integer" value="0" />
    <output name="out" type="float" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_color3I" node="switch" nodegroup="conditional">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in3" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in4" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in5" type="color3" value="0.0, 0.0, 0.0" />
    <input name="which" type="integer" value="0" />
    <output name="out" type="color3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_color4I" node="switch" nodegroup="conditional">
    <input name="in1" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in3" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in4" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in5" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="which" type="integer" value="0" />
    <output name="out" type="color4" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_vector2I" node="switch" nodegroup="conditional">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <input name="in3" type="vector2" value="0.0, 0.0" />
    <input name="in4" type="vector2" value="0.0, 0.0" />
    <input name="in5" type="vector2" value="0.0, 0.0" />
    <input name="which" type="integer" value="0" />
    <output name="out" type="vector2" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_vector3I" node="switch" nodegroup="conditional">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in3" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in4" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in5" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="which" type="integer" value="0" />
    <output name="out" type="vector3" defaultinput="in1" />
  </nodedef>
  <nodedef name="ND_switch_vector4I" node="switch" nodegroup="conditional">
    <input name="in1" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in2" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in3" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in4" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="in5" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="which" type="integer" value="0" />
    <output name="out" type="vector4" defaultinput="in1" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Channel nodes                                                            -->
  <!-- ======================================================================== -->

  <!--
    Node: <convert>
    Convert a stream from one type to another; only certain unambiguous conversion
    types are supported.
  -->
  <nodedef name="ND_convert_float_color3" node="convert" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_float_color4" node="convert" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_float_vector2" node="convert" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_float_vector3" node="convert" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_float_vector4" node="convert" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_vector2_vector3" node="convert" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_vector3_color3" node="convert" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_vector3_vector2" node="convert" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_vector3_vector4" node="convert" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_vector4_color4" node="convert" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_vector4_vector3" node="convert" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_color3_vector3" node="convert" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_color4_vector4" node="convert" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_color3_color4" node="convert" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_color4_color3" node="convert" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_convert_boolean_float" node="convert" nodegroup="channel">
    <input name="in" type="boolean" value="false" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_convert_integer_float" node="convert" nodegroup="channel">
    <input name="in" type="integer" value="0" />
    <output name="out" type="float" default="0.0" />
  </nodedef>

  <!--
    Node: <swizzle>
    Perform an arbitrary permutation of the channels of the input stream, returning a new
    stream of the specified type. Individual channels may be replicated or omitted, and the output
    stream may have a different number of channels than the input.
  -->
  <!-- from type: float -->
  <nodedef name="ND_swizzle_float_color3" node="swizzle" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <input name="channels" type="string" value="rrr" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_float_color4" node="swizzle" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <input name="channels" type="string" value="rrrr" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_float_vector2" node="swizzle" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <input name="channels" type="string" value="xx" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_float_vector3" node="swizzle" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <input name="channels" type="string" value="xxx" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_float_vector4" node="swizzle" nodegroup="channel">
    <input name="in" type="float" value="0.0" />
    <input name="channels" type="string" value="xxxx" uniform="true" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <!-- from type: color3 -->
  <nodedef name="ND_swizzle_color3_float" node="swizzle" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="r" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_color3_color3" node="swizzle" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rrr" uniform="true" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_swizzle_color3_color4" node="swizzle" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rrrr" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_color3_vector2" node="swizzle" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rr" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_color3_vector3" node="swizzle" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rrr" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_color3_vector4" node="swizzle" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rrrr" uniform="true" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <!-- from type: color4 -->
  <nodedef name="ND_swizzle_color4_float" node="swizzle" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="r" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_color4_color3" node="swizzle" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rrr" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_color4_color4" node="swizzle" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rrrr" uniform="true" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_swizzle_color4_vector2" node="swizzle" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rr" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_color4_vector3" node="swizzle" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rrr" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_color4_vector4" node="swizzle" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="rrrr" uniform="true" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <!-- from type: vector2 -->
  <nodedef name="ND_swizzle_vector2_float" node="swizzle" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="channels" type="string" value="x" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector2_color3" node="swizzle" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="channels" type="string" value="xxx" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector2_color4" node="swizzle" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="channels" type="string" value="xxxx" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector2_vector2" node="swizzle" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="channels" type="string" value="xx" uniform="true" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_swizzle_vector2_vector3" node="swizzle" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="channels" type="string" value="xxx" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector2_vector4" node="swizzle" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="channels" type="string" value="xxxx" uniform="true" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <!-- from type: vector3 -->
  <nodedef name="ND_swizzle_vector3_float" node="swizzle" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="x" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector3_color3" node="swizzle" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xxx" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector3_color4" node="swizzle" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xxxx" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector3_vector2" node="swizzle" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xx" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector3_vector3" node="swizzle" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xxx" uniform="true" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_swizzle_vector3_vector4" node="swizzle" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xxxx" uniform="true" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <!-- from type: vector4 -->
  <nodedef name="ND_swizzle_vector4_float" node="swizzle" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="x" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector4_color3" node="swizzle" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xxx" uniform="true" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector4_color4" node="swizzle" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xxxx" uniform="true" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector4_vector2" node="swizzle" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xx" uniform="true" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector4_vector3" node="swizzle" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xxx" uniform="true" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_swizzle_vector4_vector4" node="swizzle" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="channels" type="string" value="xxxx" uniform="true" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <combine2>
    Combine the channels from two streams into the same number of channels of a
    single output stream of a specified compatible type.
  -->
  <nodedef name="ND_combine2_vector2" node="combine2" nodegroup="channel">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector2" default="0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_combine2_color4CF" node="combine2" nodegroup="channel">
    <input name="in1" type="color3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_combine2_vector4VF" node="combine2" nodegroup="channel">
    <input name="in1" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="in2" type="float" value="0.0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_combine2_vector4VV" node="combine2" nodegroup="channel">
    <input name="in1" type="vector2" value="0.0, 0.0" />
    <input name="in2" type="vector2" value="0.0, 0.0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <combine3>
    Combine the channels from three streams into the same number of channels of a
    single output stream of a specified compatible type.
  -->
  <nodedef name="ND_combine3_color3" node="combine3" nodegroup="channel">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <input name="in3" type="float" value="0.0" />
    <output name="out" type="color3" default="0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_combine3_vector3" node="combine3" nodegroup="channel">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <input name="in3" type="float" value="0.0" />
    <output name="out" type="vector3" default="0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <combine4>
    Combine the channels from four streams into the same number of channels of a
    single output stream of a specified compatible type.
  -->
  <nodedef name="ND_combine4_color4" node="combine4" nodegroup="channel">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <input name="in3" type="float" value="0.0" />
    <input name="in4" type="float" value="0.0" />
    <output name="out" type="color4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>
  <nodedef name="ND_combine4_vector4" node="combine4" nodegroup="channel">
    <input name="in1" type="float" value="0.0" />
    <input name="in2" type="float" value="0.0" />
    <input name="in3" type="float" value="0.0" />
    <input name="in4" type="float" value="0.0" />
    <output name="out" type="vector4" default="0.0, 0.0, 0.0, 0.0" />
  </nodedef>

  <!--
    Node: <extract> Supplemental Node
    Extract a single channel from a colorN or vectorN stream, outputting a float.
  -->
  <nodedef name="ND_extract_color3" node="extract" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="index" type="integer" value="0" uimin="0" uimax="2" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_extract_color4" node="extract" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="index" type="integer" value="0" uimin="0" uimax="3" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_extract_vector2" node="extract" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="index" type="integer" value="0" uimin="0" uimax="1" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_extract_vector3" node="extract" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="index" type="integer" value="0" uimin="0" uimax="2" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_extract_vector4" node="extract" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="index" type="integer" value="0" uimin="0" uimax="3" uniform="true" />
    <output name="out" type="float" default="0.0" />
  </nodedef>

  <!--
    Node: <separate2>, <separate3>, <separate4> Supplemental Nodes
    Output each of the channels of a color/vector stream as a separate float output.
  -->
  <nodedef name="ND_separate2_vector2" node="separate2" nodegroup="channel">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <output name="outx" type="float" default="0.0" />
    <output name="outy" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_separate3_color3" node="separate3" nodegroup="channel">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <output name="outr" type="float" default="0.0" />
    <output name="outg" type="float" default="0.0" />
    <output name="outb" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_separate3_vector3" node="separate3" nodegroup="channel">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <output name="outx" type="float" default="0.0" />
    <output name="outy" type="float" default="0.0" />
    <output name="outz" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_separate4_color4" node="separate4" nodegroup="channel">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="outr" type="float" default="0.0" />
    <output name="outg" type="float" default="0.0" />
    <output name="outb" type="float" default="0.0" />
    <output name="outa" type="float" default="0.0" />
  </nodedef>
  <nodedef name="ND_separate4_vector4" node="separate4" nodegroup="channel">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <output name="outx" type="float" default="0.0" />
    <output name="outy" type="float" default="0.0" />
    <output name="outz" type="float" default="0.0" />
    <output name="outw" type="float" default="0.0" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Convolution nodes                                                        -->
  <!-- ======================================================================== -->

  <!--
    Node: <blur>
    A gaussian-falloff blur.
  -->
  <nodedef name="ND_blur_float" node="blur" nodegroup="convolution2d">
    <input name="in" type="float" value="0.0" />
    <input name="size" type="float" value="0.0" />
    <input name="filtertype" type="string" value="box" enum="box,gaussian" uniform="true" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_blur_color3" node="blur" nodegroup="convolution2d">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="size" type="float" value="0.0" />
    <input name="filtertype" type="string" value="box" enum="box,gaussian" uniform="true" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_blur_color4" node="blur" nodegroup="convolution2d">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="size" type="float" value="0.0" />
    <input name="filtertype" type="string" value="box" enum="box,gaussian" uniform="true" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_blur_vector2" node="blur" nodegroup="convolution2d">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="size" type="float" value="0.0" />
    <input name="filtertype" type="string" value="box" enum="box,gaussian" uniform="true" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_blur_vector3" node="blur" nodegroup="convolution2d">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="size" type="float" value="0.0" />
    <input name="filtertype" type="string" value="box" enum="box,gaussian" uniform="true" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_blur_vector4" node="blur" nodegroup="convolution2d">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="size" type="float" value="0.0" />
    <input name="filtertype" type="string" value="box" enum="box,gaussian" uniform="true" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>

  <!--
    Node: <heighttonormal>
    Convert a scalar height map to a normal map of type vector3.
  -->
  <nodedef name="ND_heighttonormal_vector3" node="heighttonormal" nodegroup="convolution2d">
    <input name="in" type="float" value="0.0" />
    <input name="scale" type="float" value="1.0" />
    <output name="out" type="vector3" default="0.5, 0.5, 1.0" />
  </nodedef>

  <!-- ======================================================================== -->
  <!-- Organization nodes                                                       -->
  <!-- ======================================================================== -->

  <!--
    Node: <dot>
    No-op; passes its input to the output unchanged.
  -->
  <nodedef name="ND_dot_float" node="dot" nodegroup="organization">
    <input name="in" type="float" value="0.0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="float" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_color3" node="dot" nodegroup="organization">
    <input name="in" type="color3" value="0.0, 0.0, 0.0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="color3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_color4" node="dot" nodegroup="organization">
    <input name="in" type="color4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="color4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_vector2" node="dot" nodegroup="organization">
    <input name="in" type="vector2" value="0.0, 0.0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="vector2" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_vector3" node="dot" nodegroup="organization">
    <input name="in" type="vector3" value="0.0, 0.0, 0.0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="vector3" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_vector4" node="dot" nodegroup="organization">
    <input name="in" type="vector4" value="0.0, 0.0, 0.0, 0.0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="vector4" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_boolean" node="dot" nodegroup="organization">
    <input name="in" type="boolean" value="false" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="boolean" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_integer" node="dot" nodegroup="organization">
    <input name="in" type="integer" value="0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="integer" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_matrix33" node="dot" nodegroup="organization">
    <input name="in" type="matrix33" value="1.0,0.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="matrix33" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_matrix44" node="dot" nodegroup="organization">
    <input name="in" type="matrix44" value="1.0,0.0,0.0,0.0, 0.0,1.0,0.0,0.0, 0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="matrix44" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_string" node="dot" nodegroup="organization">
    <input name="in" type="string" value="" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="string" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_filename" node="dot" nodegroup="organization">
    <input name="in" type="filename" value="" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="filename" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_surfaceshader" node="dot" nodegroup="organization">
    <input name="in" type="surfaceshader" value="" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="surfaceshader" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_displacementshader" node="dot" nodegroup="organization">
    <input name="in" type="displacementshader" value="" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="displacementshader" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_volumeshader" node="dot" nodegroup="organization">
    <input name="in" type="volumeshader" value="" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="volumeshader" defaultinput="in" />
  </nodedef>
  <nodedef name="ND_dot_lightshader" node="dot" nodegroup="organization">
    <input name="in" type="lightshader" value="" />
    <input name="note" type="string" value="" uniform="true" />
    <output name="out" type="lightshader" defaultinput="in" />
  </nodedef>

</materialx>