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ipynbFile animation__USDでアニメーション.ipynb

USDでTransform/Rotateのアニメーション

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from pxr import Usd,UsdGeom,Gf,Sdf

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stage = Usd.Stage.CreateInMemory()
stage.SetStartTimeCode(1)
stage.SetEndTimeCode(30)

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UsdGeom.Xform.Define(stage,"/sampleXform")
UsdGeom.Cube.Define(stage,"/sampleXform/Cube")

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UsdGeom.Cube(Usd.Prim(</sampleXform/Cube>))

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prim = stage.GetPrimAtPath("/sampleXform")

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api = UsdGeom.XformCommonAPI(prim)

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UsdGeom.XformCommonAPI.RotationOrderXYZ

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UsdGeom.XformCommonAPI.RotationOrderXYZ

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# アニメーションのキーを作る
api.SetTranslate(Gf.Vec3d(0,0,0),1)
api.SetTranslate(Gf.Vec3d(0,10,0),30)
api.SetRotate(Gf.Vec3f(0,0,0),UsdGeom.XformCommonAPI.RotationOrderXYZ,1)
api.SetRotate(Gf.Vec3f(0,0,360),UsdGeom.XformCommonAPI.RotationOrderXYZ,30)

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True

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# 自分で作ったアトリビュート
attr = prim.CreateAttribute("sample",Sdf.ValueTypeNames.Int)
for i in range(1,30):
    attr.Set(i,i)

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print(stage.GetRootLayer().ExportToString())

Success

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#usda 1.0
(
    endTimeCode = 30
    startTimeCode = 1
)

def Xform "sampleXform"
{
    custom int sample
    int sample.timeSamples = {
        1: 1,
        2: 2,
        3: 3,
        4: 4,
        5: 5,
        6: 6,
        7: 7,
        8: 8,
        9: 9,
        10: 10,
        11: 11,
        12: 12,
        13: 13,
        14: 14,
        15: 15,
        16: 16,
        17: 17,
        18: 18,
        19: 19,
        20: 20,
        21: 21,
        22: 22,
        23: 23,
        24: 24,
        25: 25,
        26: 26,
        27: 27,
        28: 28,
        29: 29,
        30: 30,
    }
    float3 xformOp:rotateXYZ.timeSamples = {
        1: (0, 0, 0),
        30: (0, 0, 360),
    }
    double3 xformOp:translate.timeSamples = {
        1: (0, 0, 0),
        30: (0, 10, 0),
    }
    uniform token[] xformOpOrder = ["xformOp:translate", "xformOp:rotateXYZ"]

    def Cube "Cube"
    {
    }
}

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stage.GetRootLayer().Export("D:/animSample.usda")

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True

最終更新日: 2021-09-12 04:10:39