// For now, this is only used by the mesh op. If this logic needs to be
// accessed elsewhere, it should move down into usdKatana.
static void
_CreateFaceSetsFromFaceSetAPI(
const UsdPrim& prim,
const PxrUsdKatanaUsdInPrivateData &data,
FnKat::GeolibCookInterface& interface)
{
UsdGeomFaceSetAPI faceSet = UsdShadeMaterial::GetMaterialFaceSet(prim);
bool isPartition = faceSet.GetIsPartition();;
if (!isPartition) {
TF_WARN("Found face set on prim <%s> that is not a partition.",
prim.GetPath().GetText());
// continue here?
}
const double currentTime = data.GetCurrentTime();
VtIntArray faceCounts, faceIndices;
faceSet.GetFaceCounts(&faceCounts, currentTime);
faceSet.GetFaceIndices(&faceIndices, currentTime);
SdfPathVector bindingTargets;
faceSet.GetBindingTargets(&bindingTargets);
size_t faceSetIdxStart = 0;
for(size_t faceSetIdx = 0; faceSetIdx < faceCounts.size(); ++faceSetIdx) {
size_t faceCount = faceCounts[faceSetIdx];
FnKat::GroupBuilder faceSetAttrs;
faceSetAttrs.set("type", FnKat::StringAttribute("faceset"));
faceSetAttrs.set("materialAssign", FnKat::StringAttribute(
PxrUsdKatanaUtils::ConvertUsdMaterialPathToKatLocation(
bindingTargets[faceSetIdx], data)));
FnKat::IntBuilder facesBuilder;
{
std::vector<int> faceIndicesVec(faceCount);
for (size_t faceIndicesIdx = 0; faceIndicesIdx < faceCount; ++faceIndicesIdx)
{
faceIndicesVec[faceIndicesIdx] =
faceIndices[faceSetIdxStart + faceIndicesIdx];
}
faceSetIdxStart += faceCount;
facesBuilder.set(faceIndicesVec);
}
faceSetAttrs.set("geometry.faces", facesBuilder.build());
std::string faceSetName = TfStringPrintf("faceset_%zu", faceSetIdx);
FnKat::GroupBuilder staticSceneCreateAttrs;
staticSceneCreateAttrs.set("a", faceSetAttrs.build());
interface.createChild(
faceSetName,
"StaticSceneCreate",
staticSceneCreateAttrs.build());
}
}
