Newest VTK breaks some tests

[doutriaux1]

vtk_ui test do not show lines anymore
opacity seems broken according to @durack1
will add more as we encounter them

[danlipsa]

@doutriaux1 @aashish24 All vtk_ui tests pass on my machine. @doutriaux1 Can you add a generated image to compare it with the baseline. Maybe will give us an idea of what is wrong. Can you give us your machine relevant details (OS, OpenGL, ...)

[doutriaux1]

will do. it's with both mac and linux (nox) using a nightly vtk-cdat. 2.8 vtk-cdat passes the tests

[danlipsa]

I see. It is with mesa (nox). How do I install a nox version of cdat? How do I build a nox version of VTK? I assume that overwriting vcs and VTK should be the same. Thanks!

[danlipsa]

My tests pass with the OpenGL hardware driver not with mesa.

[durack1]

@danlipsa this should get you there with my opacity issue (#138), if you drop the infile name into the blank space in line 51 (infile = '') then it should just work.. Let me know..
make_paperplots.py.txt

[doutriaux1]

@danlipsa on the mac i get:

Traceback (most recent call last):
  File "make_paperplots.py", line 102, in <module>
    put_png(canvas, bg_image, template=t) ; # Place png
  File "make_paperplots.py", line 43, in put_png
    canvas.backend.put_img_on_canvas(png_path,zoom=yscale,xOffset=xOffset,yOffset=-dist,units="pixels",fitToHeight=False)
  File "/Users/doutriaux1/anaconda2/envs/nightly/lib/python2.7/site-packages/vcs/VTKPlots.py", line 975, in put_img_on_canvas
    reader.SetFileName(filename)
AttributeError: 'NoneType' object has no attribute 'SetFileName'

using vcs master and vtk with your sha1

[danlipsa]

@durack1 I get the following image. Is it right?

[danlipsa]

@doutriaux1 I think you need to set Blue_marble_download = True so that the image is downloaded.

[durack1]

@danlipsa yep, that's it.. The figure itself needs some work (needs better alignment, clean up axis labels, set overlay to be the same size at the canvas etc etc), but you've reproduced what I have.. In my understanding both panels should show opacity with low/zero values

[doutriaux1]

@danlipsa I thin k what happens here is that the first (top) plot is done right, then when the second plot is executed (bottom) somehow the priorities get messed up during update by VTK and the png gets back on top. Just a wild guess here.

[danlipsa]

@durack1 @doutriaux1 So what is the correct output here? Both images should look like the bottom one?

[danlipsa]

@durack1 @doutriaux1 Or, rather they should like the top, isn't it? @doutriaux1 You may be right, I'll look into that.

[doutriaux1]

@danlipsa thre bottom one looks better.

[danlipsa]

@durack1 @doutriaux1 In the first image I removed the background png and changed the colors
The white areas are masked.

In the second image I added back the background.

So I think in the top plot, the background image completely covers the plot, in the bottom plot, you have z-fighting because both the plot and the background png end up on the same layer. How is this suppose to work?
What should the layers of the two plots and two background images be?