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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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53
tests/python/bl_usd_import_test.py
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@@ -737,6 +737,59 @@ class USDImportTest(AbstractUSDTest):
self.check_attribute_missing(mesh, "fc_quat")
self.check_attribute_missing(mesh, "fc_mat4x4")
# Find the non "bezier" Curves object -- Has 2 curves (12 vertices each)
all_curves = [o for o in bpy.data.objects if o.type == 'CURVES']
curves = [o for o in all_curves if not o.parent.name.startswith("Curve_bezier")]
curves = curves[0].data
self.check_attribute(curves, "p_bool", 'POINT', 'BOOLEAN', 24)
self.check_attribute(curves, "p_int8", 'POINT', 'INT', 24)
self.check_attribute(curves, "p_int32", 'POINT', 'INT', 24)
self.check_attribute(curves, "p_float", 'POINT', 'FLOAT', 24)
self.check_attribute_missing(curves, "p_byte_color")
self.check_attribute_missing(curves, "p_color")
self.check_attribute(curves, "p_vec2", 'POINT', 'FLOAT2', 24)
self.check_attribute(curves, "p_vec3", 'POINT', 'FLOAT_VECTOR', 24)
self.check_attribute(curves, "p_quat", 'POINT', 'QUATERNION', 24)
self.check_attribute_missing(curves, "p_mat4x4")
self.check_attribute(curves, "sp_bool", 'CURVE', 'BOOLEAN', 2)
self.check_attribute(curves, "sp_int8", 'CURVE', 'INT', 2)
self.check_attribute(curves, "sp_int32", 'CURVE', 'INT', 2)
self.check_attribute(curves, "sp_float", 'CURVE', 'FLOAT', 2)
self.check_attribute_missing(curves, "sp_byte_color")
self.check_attribute_missing(curves, "sp_color")
self.check_attribute(curves, "sp_vec2", 'CURVE', 'FLOAT2', 2)
self.check_attribute(curves, "sp_vec3", 'CURVE', 'FLOAT_VECTOR', 2)
self.check_attribute(curves, "sp_quat", 'CURVE', 'QUATERNION', 2)
self.check_attribute_missing(curves, "sp_mat4x4")
# Find the "bezier" Curves object -- Has 3 curves (2, 3, and 5 control points)
curves = [o for o in all_curves if o.parent.name.startswith("Curve_bezier")]
curves = curves[0].data
self.check_attribute(curves, "p_bool", 'POINT', 'BOOLEAN', 10)
self.check_attribute(curves, "p_int8", 'POINT', 'INT', 10)
self.check_attribute(curves, "p_int32", 'POINT', 'INT', 10)
self.check_attribute(curves, "p_float", 'POINT', 'FLOAT', 10)
self.check_attribute_missing(curves, "p_byte_color")
self.check_attribute_missing(curves, "p_color")
self.check_attribute(curves, "p_vec2", 'POINT', 'FLOAT2', 10)
self.check_attribute(curves, "p_vec3", 'POINT', 'FLOAT_VECTOR', 10)
self.check_attribute(curves, "p_quat", 'POINT', 'QUATERNION', 10)
self.check_attribute_missing(curves, "p_mat4x4")
self.check_attribute(curves, "sp_bool", 'CURVE', 'BOOLEAN', 3)
self.check_attribute(curves, "sp_int8", 'CURVE', 'INT', 3)
self.check_attribute(curves, "sp_int32", 'CURVE', 'INT', 3)
self.check_attribute(curves, "sp_float", 'CURVE', 'FLOAT', 3)
self.check_attribute_missing(curves, "sp_byte_color")
self.check_attribute_missing(curves, "sp_color")
self.check_attribute(curves, "sp_vec2", 'CURVE', 'FLOAT2', 3)
self.check_attribute(curves, "sp_vec3", 'CURVE', 'FLOAT_VECTOR', 3)
self.check_attribute(curves, "sp_quat", 'CURVE', 'QUATERNION', 3)
self.check_attribute_missing(curves, "sp_mat4x4")
def main():
global args