static string
__repr__(const UsdRelationship &self)
{
if (self) {
return TfStringPrintf("%s.GetRelationship(%s)",
TfPyRepr(self.GetPrim()).c_str(),
TfPyRepr(self.GetName()).c_str());
} else {
return "invalid " + self.GetDescription();
}
}
PXR_NAMESPACE_OPEN_SCOPE
// TODO: We should centralize this logic in a UsdImaging ShaderAdapter.
/*static*/
UsdPrim
UsdImaging_MaterialStrategy::GetTargetedShader(UsdPrim const& materialPrim,
UsdRelationship const& materialRel)
{
SdfPathVector targets;
if (!materialRel.GetForwardedTargets(&targets))
return UsdPrim();
if (targets.size() != 1) {
// XXX: This should really be a validation error once USD gets that
// feature.
TF_WARN("We expect only one target on relationship %s of prim <%s>, "
"but got %zu.",
materialRel.GetName().GetText(),
materialPrim.GetPath().GetText(),
targets.size());
return UsdPrim();
}
if (!targets[0].IsPrimPath()) {
// XXX: This should really be a validation error once USD gets that
// feature.
TF_WARN("We expect the target of the relationship %s of prim <%s> "
"to be a prim, instead it is <%s>.",
materialRel.GetName().GetText(),
materialPrim.GetPath().GetText(),
targets[0].GetText());
return UsdPrim();
}
return materialPrim.GetStage()->GetPrimAtPath(targets[0]);
}