bool
UsdShadeParameter::ConnectToSource(UsdShadeInput const &input) const
{
UsdShadeConnectableAPI source(input.GetAttr().GetPrim());
return ConnectToSource(source, input.GetBaseName(),
/* sourceType */ UsdShadeAttributeType::Input);
}
static
void _ExtractPrimvarsFromNode(UsdShadeShader const & shadeNode,
HdMaterialNode const & node,
HdMaterialNetwork *materialNetwork)
{
// Check if it is a node that reads primvars.
// XXX : We could be looking at more stuff here like manifolds..
if (node.identifier == TfToken("Primvar_3")) {
// Extract the primvar name from the usd shade node
// and store it in the list of primvars in the network
UsdShadeInput nameAttrib = shadeNode.GetInput(TfToken("varname"));
if (nameAttrib) {
VtValue value;
nameAttrib.Get(&value);
if (value.IsHolding<std::string>()) {
materialNetwork->primvars.push_back(
TfToken(value.Get<std::string>()));
}
}
}
}
bool
UsdShadeOutput::CanConnect(const UsdShadeInput &sourceInput) const
{
return CanConnect(sourceInput.GetAttr());
}
