PXR_NAMESPACE_OPEN_SCOPE
/* static */
MObject
UsdMayaTranslatorMaterial::Read(
const TfToken& shadingMode,
const UsdShadeMaterial& shadeMaterial,
const UsdGeomGprim& boundPrim,
UsdMayaPrimReaderContext* context)
{
if (shadingMode == UsdMayaShadingModeTokens->none) {
return MObject();
}
UsdMayaShadingModeImportContext c(shadeMaterial, boundPrim, context);
MObject shadingEngine;
if (c.GetCreatedObject(shadeMaterial.GetPrim(), &shadingEngine)) {
return shadingEngine;
}
if (UsdMayaShadingModeImporter importer =
UsdMayaShadingModeRegistry::GetImporter(shadingMode)) {
shadingEngine = importer(&c);
}
if (!shadingEngine.isNull()) {
c.AddCreatedObject(shadeMaterial.GetPrim(), shadingEngine);
}
return shadingEngine;
}
MObject slopeShaderBehavior::findShadingEngine(MObject &node)
//
// Description:
// Given the material MObject this method will
// return the shading group that it is assigned to.
// if there is no shading group associated with
// the material than a null MObject is apssed back.
//
{
MFnDependencyNode nodeFn(node);
MPlug srcPlug = nodeFn.findPlug("outColor");
MPlugArray nodeConnections;
srcPlug.connectedTo(nodeConnections, false, true);
//loop through the connections
//and find the shading engine node that
//it is connected to
//
for(unsigned i = 0; i < nodeConnections.length(); i++)
{
if(nodeConnections[i].node().hasFn(MFn::kShadingEngine))
return nodeConnections[i].node();
}
//no shading engine associated so return a
//null MObject
//
return MObject();
}
MObject
PxrUsdMayaShadingModeExportContext::GetSurfaceShader() const
{
MStatus status;
MFnDependencyNode seDepNode(_shadingEngine, &status);
if (!status) {
return MObject();
}
MPlug ssPlug = seDepNode.findPlug("surfaceShader", true, &status);
if (!status) {
return MObject();
}
MObject ss(ssPlug.asMObject());
if (ss.isNull()) {
return MObject();
}
return PxrUsdMayaUtil::GetConnected(ssPlug).node();
}