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;
}
/*static*/
SdfPath
UsdImaging_MaterialStrategy::GetBinding(UsdShadeMaterial const& material)
{
TF_DEBUG(USDIMAGING_SHADERS).Msg("\t Look: %s\n",
material.GetPath().GetText());
// ---------------------------------------------------------------------- //
// Hydra-only shader style - displayLook:bxdf
// ---------------------------------------------------------------------- //
if (UsdRelationship matRel = UsdHydraLookAPI(material).GetBxdfRel()) {
TF_DEBUG(USDIMAGING_SHADERS).Msg("\t LookRel: %s\n",
matRel.GetPath().GetText());
UsdShadeShader shader(
UsdImaging_MaterialStrategy::GetTargetedShader(
material.GetPrim(),
matRel));
if (shader) {
TF_DEBUG(USDIMAGING_SHADERS).Msg("\t UsdShade binding found: %s\n",
shader.GetPath().GetText());
return shader.GetPath();
}
}
// ---------------------------------------------------------------------- //
// Deprecated shader style - hydraLook:Surface
// ---------------------------------------------------------------------- //
TfToken hdSurf("hydraLook:surface");
TfToken surfType("HydraPbsSurface");
if (UsdRelationship matRel = material.GetPrim().GetRelationship(hdSurf)) {
TF_DEBUG(USDIMAGING_SHADERS).Msg("\t LookRel: %s\n",
matRel.GetPath().GetText());
if (UsdPrim shader =
UsdImaging_MaterialStrategy::GetTargetedShader(
material.GetPrim(),
matRel)) {
if (TF_VERIFY(shader.GetTypeName() == surfType)) {
TF_DEBUG(USDIMAGING_SHADERS).Msg(
"\t Deprecated binding found: %s\n",
shader.GetPath().GetText());
return shader.GetPath();
}
}
}
return SdfPath::EmptyPath();
}
UsdPrim
PxrUsdMayaShadingModeExportContext::MakeStandardMaterialPrim(
const AssignmentVector& assignmentsToBind,
const std::string& name) const
{
UsdPrim ret;
std::string materialName = name;
if (materialName.empty()) {
MStatus status;
MFnDependencyNode seDepNode(_shadingEngine, &status);
if (!status) {
return ret;
}
MString seName = seDepNode.name();
materialName = MNamespace::stripNamespaceFromName(seName).asChar();
}
materialName = PxrUsdMayaUtil::SanitizeName(materialName);
UsdStageRefPtr stage = GetUsdStage();
if (UsdPrim materialParent = _GetMaterialParent(stage, assignmentsToBind)) {
SdfPath materialPath = materialParent.GetPath().AppendChild(
TfToken(materialName));
UsdShadeMaterial material = UsdShadeMaterial::Define(
GetUsdStage(), materialPath);
UsdPrim materialPrim = material.GetPrim();
// could use this to determine where we want to export.
TF_FOR_ALL(iter, assignmentsToBind) {
const SdfPath &boundPrimPath = iter->first;
const VtIntArray &faceIndices = iter->second;
UsdPrim boundPrim = stage->OverridePrim(boundPrimPath);
if (faceIndices.empty()) {
material.Bind(boundPrim);
} else if (TfGetEnvSetting(PIXMAYA_EXPORT_OLD_STYLE_FACESETS)) {
UsdGeomFaceSetAPI faceSet = material.CreateMaterialFaceSet(
boundPrim);
faceSet.AppendFaceGroup(faceIndices, materialPath);
} else {
// It might be worth adding a utility method for the following
// block of code in core.
UsdGeomSubset faceSubset =
UsdShadeMaterial::CreateMaterialBindFaceSubset(
UsdGeomImageable(boundPrim),
/* subsetName */ TfToken(materialName),
faceIndices);
material.Bind(faceSubset.GetPrim());
UsdShadeMaterial::SetMaterialBindFaceSubsetsFamilyType(
UsdGeomImageable(boundPrim),
UsdGeomSubset::FamilyType::Partition);
}
}
return materialPrim;
}