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USD: Read and write custom attributes for Curves

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Add support for reading and writing custom `Curves` attributes.

This allows us to roundtrip Blender's Hair grooms containing UVs and
other attribute data. Note that animated attribute values are not
supported with this change.

This will also address #120042

Pull Request: https://projects.blender.org/blender/blender/pulls/121928
This commit is contained in:
Jesse Yurkovich
2024-05-25 22:23:40 +02:00
committed by Jesse Yurkovich
parent d3dbd7bdd0
commit 21db0daa4e
6 changed files with 306 additions and 1 deletions
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48
tests/python/bl_usd_export_test.py
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@@ -263,6 +263,54 @@ class USDExportTest(AbstractUSDTest):
self.check_primvar(prim, "fc_quat", "VtArray<GfQuatf>", "faceVarying", 4)
self.check_primvar_missing(prim, "fc_mat4x4")
prim = stage.GetPrimAtPath("/root/Curve_base/Curves/Curves")
self.check_primvar(prim, "p_bool", "VtArray<bool>", "vertex", 24)
self.check_primvar(prim, "p_int8", "VtArray<int>", "vertex", 24)
self.check_primvar(prim, "p_int32", "VtArray<int>", "vertex", 24)
self.check_primvar(prim, "p_float", "VtArray<float>", "vertex", 24)
self.check_primvar_missing(prim, "p_color")
self.check_primvar_missing(prim, "p_byte_color")
self.check_primvar(prim, "p_vec2", "VtArray<GfVec2f>", "vertex", 24)
self.check_primvar(prim, "p_vec3", "VtArray<GfVec3f>", "vertex", 24)
self.check_primvar(prim, "p_quat", "VtArray<GfQuatf>", "vertex", 24)
self.check_primvar_missing(prim, "p_mat4x4")
self.check_primvar(prim, "sp_bool", "VtArray<bool>", "uniform", 2)
self.check_primvar(prim, "sp_int8", "VtArray<int>", "uniform", 2)
self.check_primvar(prim, "sp_int32", "VtArray<int>", "uniform", 2)
self.check_primvar(prim, "sp_float", "VtArray<float>", "uniform", 2)
self.check_primvar_missing(prim, "sp_color")
self.check_primvar_missing(prim, "sp_byte_color")
self.check_primvar(prim, "sp_vec2", "VtArray<GfVec2f>", "uniform", 2)
self.check_primvar(prim, "sp_vec3", "VtArray<GfVec3f>", "uniform", 2)
self.check_primvar(prim, "sp_quat", "VtArray<GfQuatf>", "uniform", 2)
self.check_primvar_missing(prim, "sp_mat4x4")
prim = stage.GetPrimAtPath("/root/Curve_bezier_base/Curves_bezier/Curves")
self.check_primvar(prim, "p_bool", "VtArray<bool>", "varying", 10)
self.check_primvar(prim, "p_int8", "VtArray<int>", "varying", 10)
self.check_primvar(prim, "p_int32", "VtArray<int>", "varying", 10)
self.check_primvar(prim, "p_float", "VtArray<float>", "varying", 10)
self.check_primvar_missing(prim, "p_color")
self.check_primvar_missing(prim, "p_byte_color")
self.check_primvar(prim, "p_vec2", "VtArray<GfVec2f>", "varying", 10)
self.check_primvar(prim, "p_vec3", "VtArray<GfVec3f>", "varying", 10)
self.check_primvar(prim, "p_quat", "VtArray<GfQuatf>", "varying", 10)
self.check_primvar_missing(prim, "p_mat4x4")
self.check_primvar(prim, "sp_bool", "VtArray<bool>", "uniform", 3)
self.check_primvar(prim, "sp_int8", "VtArray<int>", "uniform", 3)
self.check_primvar(prim, "sp_int32", "VtArray<int>", "uniform", 3)
self.check_primvar(prim, "sp_float", "VtArray<float>", "uniform", 3)
self.check_primvar_missing(prim, "sp_color")
self.check_primvar_missing(prim, "sp_byte_color")
self.check_primvar(prim, "sp_vec2", "VtArray<GfVec2f>", "uniform", 3)
self.check_primvar(prim, "sp_vec3", "VtArray<GfVec3f>", "uniform", 3)
self.check_primvar(prim, "sp_quat", "VtArray<GfQuatf>", "uniform", 3)
self.check_primvar_missing(prim, "sp_mat4x4")
def main():
global args