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USD: Add tests for mesh export triangulation

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Pull Request: https://projects.blender.org/blender/blender/pulls/126265
This commit is contained in:
Jesse Yurkovich
2024-08-13 08:07:15 +02:00
committed by Jesse Yurkovich
parent 5c2b9218c4
commit 8cc3808330
1 changed files with 51 additions and 0 deletions
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51
tests/python/bl_usd_export_test.py
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@@ -393,6 +393,57 @@ class USDExportTest(AbstractUSDTest):
self.assertEqual(len([sharp for sharp in usd_crease_sharpness if sharp < 1]), 9)
self.assertEqual(len([sharp for sharp in usd_crease_sharpness if sharp == 10]), 1)
def test_export_mesh_triangulate(self):
"""Test exporting with different triangulation options for meshes."""
# Use the current scene to create simple geometry to triangulate
bpy.ops.mesh.primitive_plane_add(size=1)
bpy.ops.mesh.primitive_circle_add(fill_type='NGON', radius=1, vertices=7)
# We assume that triangulation is thoroughly tested elsewhere. Here we are only interested
# in checking that USD passes its operator properties through correctly. We use a minimal
# combination of quad and ngon methods to test.
tri_export_path1 = self.tempdir / "usd_mesh_tri_setup1.usda"
res = bpy.ops.wm.usd_export(
filepath=str(tri_export_path1),
triangulate_meshes=True,
quad_method='FIXED',
ngon_method='BEAUTY',
evaluation_mode="RENDER",
)
self.assertEqual({'FINISHED'}, res, f"Unable to export to {tri_export_path1}")
tri_export_path2 = self.tempdir / "usd_mesh_tri_setup2.usda"
res = bpy.ops.wm.usd_export(
filepath=str(tri_export_path2),
triangulate_meshes=True,
quad_method='FIXED_ALTERNATE',
ngon_method='CLIP',
evaluation_mode="RENDER",
)
self.assertEqual({'FINISHED'}, res, f"Unable to export to {tri_export_path2}")
stage1 = Usd.Stage.Open(str(tri_export_path1))
stage2 = Usd.Stage.Open(str(tri_export_path2))
# The Plane should have different vertex ordering because of the quad methods chosen
plane1 = UsdGeom.Mesh(stage1.GetPrimAtPath("/root/Plane/Plane"))
plane2 = UsdGeom.Mesh(stage2.GetPrimAtPath("/root/Plane/Plane"))
indices1 = plane1.GetFaceVertexIndicesAttr().Get()
indices2 = plane2.GetFaceVertexIndicesAttr().Get()
self.assertEqual(len(indices1), 6)
self.assertEqual(len(indices2), 6)
self.assertNotEqual(indices1, indices2)
# The Circle should have different vertex ordering because of the ngon methods chosen
circle1 = UsdGeom.Mesh(stage1.GetPrimAtPath("/root/Circle/Circle"))
circle2 = UsdGeom.Mesh(stage2.GetPrimAtPath("/root/Circle/Circle"))
indices1 = circle1.GetFaceVertexIndicesAttr().Get()
indices2 = circle2.GetFaceVertexIndicesAttr().Get()
self.assertEqual(len(indices1), 15)
self.assertEqual(len(indices2), 15)
self.assertNotEqual(indices1, indices2)
def test_animation(self):
bpy.ops.wm.open_mainfile(filepath=str(self.testdir / "usd_anim_test.blend"))
export_path = self.tempdir / "usd_anim_test.usda"