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ipynbFile USDAttribute_connections.ipynb

AttributeのConnectionを試す

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from pxr import Usd,Sdf

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stage = Usd.Stage.CreateInMemory()
stage.Reload()

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prim = stage.DefinePrim("/Sample")
attr = prim.CreateAttribute('hoge',Sdf.ValueTypeNames.Int)
attr.Set(10)

primB = stage.DefinePrim("/srcPrim")
attrB = primB.CreateAttribute("src",Sdf.ValueTypeNames.Int)
attrB.Set(100)

Success

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True

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# アトリビュートのコネクションをする

attr.AddConnection(attrB.GetPath())
print(stage.ExportToString())

Success

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#usda 1.0
(
    doc = """Generated from Composed Stage of root layer 
"""
)

def "Sample"
{
    custom int hoge = 10
    int hoge.connect = </srcPrim.src>
}

def "srcPrim"
{
    custom int src = 100
}

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# 接続先のアトリビュートを取得すると、そのSdfPathがとれるので
# それを利用して接続先の値を取得
print(attr.GetConnections())
# 接続先の値を取得
for i in attr.GetConnections():
    attr = stage.GetAttributeAtPath(i)
    print(attr.Get())

Success

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[]

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# コンポジションする場合

stageB = Usd.Stage.CreateInMemory()
layer = stageB.GetRootLayer()
layer.subLayerPaths = [stage.GetRootLayer().identifier]

primB = stageB.DefinePrim("/srcPathB")
attrB = primB.CreateAttribute("srcB",Sdf.ValueTypeNames.Int)
attrB.Set(1000)
print(attrB.GetPath())
toAttr = stageB.GetAttributeAtPath("/Sample.hoge")
toAttr.AddConnection(attrB.GetPath())

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/srcPathB.srcB

Success

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True

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print(toAttr.GetConnections())
print(toAttr.HasAuthoredConnections())

print(stageB.ExportToString())

Success

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[Sdf.Path('/srcPathB.srcB'), Sdf.Path('/srcPrim.src')]
#usda 1.0
(
    doc = """Generated from Composed Stage of root layer 
"""
)

def "Sample"
{
    custom int hoge = 10
    int hoge.connect = [
        </srcPathB.srcB>,
        </srcPrim.src>,
    ]
}

def "srcPrim"
{
    custom int src = 100
}

def "srcPathB"
{
    custom int srcB = 1000
}


True

最終更新日: 2021-10-14 07:47:50