void
OsdPtexMeshData::rebuildHbrMeshIfNeeded(OpenSubdivPtexShader *shader)
{
MStatus status;
if (!_meshTopoDirty && !shader->getHbrMeshDirty())
return;
MFnMesh meshFn(_meshDagPath, &status);
if (status != MS::kSuccess) return;
int level = shader->getLevel();
if (level < 1) level =1;
SchemeType scheme = shader->getScheme();
if (scheme == kLoop) scheme = kCatmark; // XXX: avoid loop for now
// Get Maya vertex topology and crease data
MIntArray vertexCount;
MIntArray vertexList;
meshFn.getVertices(vertexCount, vertexList);
MUintArray edgeIds;
MDoubleArray edgeCreaseData;
meshFn.getCreaseEdges(edgeIds, edgeCreaseData);
MUintArray vtxIds;
MDoubleArray vtxCreaseData;
meshFn.getCreaseVertices(vtxIds, vtxCreaseData);
if (vertexCount.length() == 0) return;
// Cache attribute values
_level = shader->getLevel();
_scheme = shader->getScheme();
_kernel = shader->getKernel();
_adaptive = shader->isAdaptive();
_interpBoundary = shader->getInterpolateBoundary();
// Copy Maya vectors into std::vectors
std::vector<int> numIndices(&vertexCount[0], &vertexCount[vertexCount.length()]);
std::vector<int> faceIndices(&vertexList[0], &vertexList[vertexList.length()]);
std::vector<int> vtxCreaseIndices(&vtxIds[0], &vtxIds[vtxIds.length()]);
std::vector<double> vtxCreases(&vtxCreaseData[0], &vtxCreaseData[vtxCreaseData.length()]);
std::vector<double> edgeCreases(&edgeCreaseData[0], &edgeCreaseData[edgeCreaseData.length()]);
// Edge crease index is stored as pairs of vertex ids
int nEdgeIds = edgeIds.length();
std::vector<int> edgeCreaseIndices;
edgeCreaseIndices.resize(nEdgeIds*2);
for (int i = 0; i < nEdgeIds; ++i) {
int2 vertices;
status = meshFn.getEdgeVertices(edgeIds[i], vertices);
if (status.error()) {
status.perror("ERROR can't get creased edge vertices");
continue;
}
edgeCreaseIndices[i*2] = vertices[0];
edgeCreaseIndices[i*2+1] = vertices[1];
}
// Convert attribute enums to HBR enums (this is why the enums need to match)
// XXX use some sort of built-in transmorgification avoid assumption?
HbrMeshUtil::SchemeType hbrScheme = (HbrMeshUtil::SchemeType) _scheme;
OsdHbrMesh::InterpolateBoundaryMethod hbrInterpBoundary =
(OsdHbrMesh::InterpolateBoundaryMethod) _interpBoundary;
// Convert Maya mesh to internal HBR representation
_hbrmesh = ConvertToHBR(meshFn.numVertices(), numIndices, faceIndices,
vtxCreaseIndices, vtxCreases,
std::vector<int>(), std::vector<float>(),
edgeCreaseIndices, edgeCreases,
hbrInterpBoundary,
hbrScheme,
true ); // add ptex indices to HBR
// note: GL function can't be used in prepareForDraw API.
_needsInitializeMesh = true;
// Mesh topology data is up to date
_meshTopoDirty = false;
shader->setHbrMeshDirty(false);
}
// #### rebuildHbrMeshIfNeeded
//
// If the topology of the mesh changes, or any attributes that affect
// how the mesh is computed the original HBR needs to be rebuilt
// which will trigger a rebuild of the FAR mesh and subsequent buffers.
//
void
OsdMeshData::rebuildHbrMeshIfNeeded(OpenSubdivShader *shader)
{
MStatus status = MS::kSuccess;
if (!_meshTopoDirty && !shader->getHbrMeshDirty())
return;
MFnMesh meshFn(_meshDagPath);
// Cache attribute values
_level = shader->getLevel();
_kernel = shader->getKernel();
_adaptive = shader->isAdaptive();
_uvSet = shader->getUVSet();
// Get Maya vertex topology and crease data
MIntArray vertexCount;
MIntArray vertexList;
meshFn.getVertices(vertexCount, vertexList);
MUintArray edgeIds;
MDoubleArray edgeCreaseData;
meshFn.getCreaseEdges(edgeIds, edgeCreaseData);
MUintArray vtxIds;
MDoubleArray vtxCreaseData;
meshFn.getCreaseVertices(vtxIds, vtxCreaseData);
if (vertexCount.length() == 0) return;
// Copy Maya vectors into std::vectors
std::vector<int> numIndices(&vertexCount[0], &vertexCount[vertexCount.length()]);
std::vector<int> faceIndices(&vertexList[0], &vertexList[vertexList.length()]);
std::vector<int> vtxCreaseIndices(&vtxIds[0], &vtxIds[vtxIds.length()]);
std::vector<double> vtxCreases(&vtxCreaseData[0], &vtxCreaseData[vtxCreaseData.length()]);
std::vector<double> edgeCreases(&edgeCreaseData[0], &edgeCreaseData[edgeCreaseData.length()]);
// Edge crease index is stored as pairs of vertex ids
int nEdgeIds = edgeIds.length();
std::vector<int> edgeCreaseIndices;
edgeCreaseIndices.resize(nEdgeIds*2);
for (int i = 0; i < nEdgeIds; ++i) {
int2 vertices;
status = meshFn.getEdgeVertices(edgeIds[i], vertices);
if (status.error()) {
MERROR(status, "OpenSubdivShader: Can't get edge vertices");
continue;
}
edgeCreaseIndices[i*2] = vertices[0];
edgeCreaseIndices[i*2+1] = vertices[1];
}
// Convert attribute enums to HBR enums (this is why the enums need to match)
HbrMeshUtil::SchemeType hbrScheme = (HbrMeshUtil::SchemeType) shader->getScheme();
OsdHbrMesh::InterpolateBoundaryMethod hbrInterpBoundary =
(OsdHbrMesh::InterpolateBoundaryMethod) shader->getInterpolateBoundary();
OsdHbrMesh::InterpolateBoundaryMethod hbrInterpUVBoundary =
(OsdHbrMesh::InterpolateBoundaryMethod) shader->getInterpolateUVBoundary();
// clear any existing face-varying descriptor
if (_fvarDesc) {
delete _fvarDesc;
_fvarDesc = NULL;
}
// read UV data from maya and build per-face per-vert list of UVs for HBR face-varying data
std::vector< float > uvList;
status = buildUVList( meshFn, uvList );
if (! status.error()) {
// Create face-varying data descriptor. The memory required for indices
// and widths needs to stay alive as the HBR library only takes in the
// pointers and assumes the client will maintain the memory so keep _fvarDesc
// around as long as _hbrmesh is around.
int fvarIndices[] = { 0, 1 };
int fvarWidths[] = { 1, 1 };
_fvarDesc = new FVarDataDesc( 2, fvarIndices, fvarWidths, 2, hbrInterpUVBoundary );
}
if (_fvarDesc && hbrScheme != HbrMeshUtil::kCatmark) {
MGlobal::displayWarning("Face-varying not yet supported for Loop/Bilinear, using Catmull-Clark");
hbrScheme = HbrMeshUtil::kCatmark;
}
// Convert Maya mesh to internal HBR representation
_hbrmesh = ConvertToHBR(meshFn.numVertices(), numIndices, faceIndices,
vtxCreaseIndices, vtxCreases,
std::vector<int>(), std::vector<float>(),
edgeCreaseIndices, edgeCreases,
hbrInterpBoundary,
hbrScheme,
false, // no ptex
_fvarDesc,
_fvarDesc?&uvList:NULL); // yes fvar (if have UVs)
// note: GL function can't be used in prepareForDraw API.
_needsInitializeMesh = true;
// Mesh topology data is up to date
_meshTopoDirty = false;
shader->setHbrMeshDirty(false);
}