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gltfからUsdMeshを作る

ipynbFile gltf2UsdMesh__gltfからUsdMeshを作る.ipynb

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import trimesh
from pxr import Usd, UsdGeom, Sdf

gltf_file = r"D:\work\data_sample\susanne.glb"
gltf = trimesh.load(gltf_file)
geo_name = list(gltf.geometry.keys())[0]
geo = gltf.geometry[geo_name]

Success

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unable to load textures without pillow!

In [92]:

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# 頂点取得
vtx = []
for v in geo.vertices:
    vtx.append(list(v))

In [93]:

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# Faceを構成するIndexとVertexCountを取得
indexes = []
vtxcount = []

for f in geo.faces:
    indexes += [int(x) for x in f]
    vtxcount.append(len(f))

In [94]:

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# to USDMesh
stage = Usd.Stage.CreateInMemory()
UsdGeom.Xform.Define(stage, f'/{geo_name}')
mesh = UsdGeom.Mesh.Define(stage, f'/{geo_name}/{geo_name}Mesh')

mesh.CreatePointsAttr(vtx)
# 1FaceあたりのVertex数
mesh.CreateFaceVertexCountsAttr(vtxcount)
# 結線情報?
mesh.CreateFaceVertexIndicesAttr(indexes)
# BoundingBoxをセット?
mesh.CreateExtentAttr(UsdGeom.PointBased(mesh).ComputeExtent(mesh.GetPointsAttr().Get()))

Success

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Usd.Prim(</Suzanne/SuzanneMesh>).GetAttribute('extent')

最終更新日: 2021-05-02 06:25:09