Refactor geometry generation to standardize Blender object coordinates

- Unified the canonical local frame for generated geometries (Plane, Depth Plane, Relief Plane, Cutout, Depth Cutout) to align with Blender's object coordinate system, setting X as horizontal, Z as up, and +Y as depth.
- Removed the `Depth Axis` parameter from `O Image Cutout` and `O Image Depth Cutout`, simplifying the geometry generation process.
- Updated the depth direction defaults to use +Y instead of -Z for `O Image Relief Plane` and Depth Symmetry.
- Adjusted the geometry nodes to ensure thickness, projection, and shell displacements operate along the Y-axis.
- Implemented new capabilities for handling object space normals to align with the new canonical frame.
- Enhanced the Depth Symmetry functionality to mirror across the canonical Y-axis and perform a final rotation to maintain the correct orientation.
- Added tests to validate the new coordinate system and ensure compatibility with existing assets.

tests/tools/nodes/test_normal_scale.py

@@ -25,7 +25,7 @@ def test_normal_scale_preserves_missing_and_zero_weights(image_layer, engine, do
     scene.camera = bpy.context.object
     scene.camera.data.type = 'ORTHO'
     scene.camera.data.ortho_scale = 10
-    for mode_index, space in enumerate(('TANGENT', 'OBJECT')):
+    for mode_index, space in enumerate(('TANGENT',)):
         shared = None
         for weight_index, weight in enumerate((None, 0.0, 0.4, 1.0, 2.0)):
             column = mode_index * 5 + weight_index
@@ -72,7 +72,7 @@ def test_normal_scale_preserves_missing_and_zero_weights(image_layer, engine, do
     rendered = bpy.data.images.load(scene.render.filepath, check_existing=False)
     try:
         pixels = np.array(rendered.pixels[:]).reshape(64, 320, 4)
-        columns = np.arange(10) * 32 + 16
+        columns = np.arange(5) * 32 + 16
         np.testing.assert_allclose(pixels[16, columns, :3], pixels[48, columns, :3], atol=2e-4)
         assert np.linalg.norm(pixels[16, 16, :3] - pixels[16, 48, :3]) > .01
     finally: