bool
PxrUsdKatana_AreRelTargetsFromBaseMaterial(const UsdRelationship &rel)
{
// Find the strongest opinion about the relationship targets.
SdfRelationshipSpecHandle strongestRelSpec;
SdfPropertySpecHandleVector propStack = rel.GetPropertyStack();
for (const SdfPropertySpecHandle &prop: propStack) {
if (SdfRelationshipSpecHandle relSpec =
TfDynamic_cast<SdfRelationshipSpecHandle>(prop)) {
if (relSpec->HasTargetPathList()) {
strongestRelSpec = relSpec;
break;
}
}
}
// Find which prim node introduced that opinion.
if (strongestRelSpec) {
for(const PcpNodeRef &node:
rel.GetPrim().GetPrimIndex().GetNodeRange()) {
if (node.GetPath() == strongestRelSpec->GetPath().GetPrimPath() &&
node.GetLayerStack()->HasLayer(strongestRelSpec->GetLayer())) {
return _NodeRepresentsLiveBaseMaterial(node);
}
}
}
return false;
}
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();
}
}