Beakerboy patch 1 (#116)

* Update buildingpart.test.js

* Update buildingpart.js

Author: Beakerboy

src/buildingpart.js

@@ -148,11 +148,10 @@ class BuildingPart {
     const directionalRoofs = ['gabled', 'round'];
     calculatedOptions.roof.direction = this.options.specified.roof.direction ?? this.options.inherited.roof.direction;
     if (calculatedOptions.roof.direction === undefined && directionalRoofs.includes(calculatedOptions.roof.shape)) {
-      // Radians pi > x >= -pi
       let longestSide = BuildingShapeUtils.longestSideAngle(this.shape);
 
       // Convert to angle.
-      calculatedOptions.roof.direction = BuildingPart.atanRadToCompassDeg(longestSide);
+      calculatedOptions.roof.direction = (BuildingPart.atanRadToCompassDeg(longestSide) + 90) % 360;
     }
     const extents = BuildingShapeUtils.extents(this.shape, calculatedOptions.roof.direction / 360 * 2 * Math.PI);
     const shapeHeight = extents[3] - extents[1];

test/buildingpart.test.js

@@ -70,7 +70,7 @@ test('Constructor', () => {
   expect(value).toStrictEqual([4.332747472106493, 5.88221335051411]);
   expect(BuildingShapeUtils.edgeDirection(part.shape)).toStrictEqual([Math.PI / 2, 0, -Math.PI / 2, Math.PI]);
   expect(BuildingShapeUtils.longestSideAngle(part.shape)).toBe(Math.PI / 2);
-  expect(part.options.roof.direction).toBe(0);
+  expect(part.options.roof.direction).toBe(90);
   expect(errors.length).toBe(0);
 });