//! Create OSD HBR mesh.
//! Caller is expected to delete the resulting hbrMesh returned
HMesh *
createOsdHbrFromPoly( MFnMesh const & inMeshFn,
MItMeshPolygon & inMeshItPolygon,
std::vector<int> & fvarIndices,
std::vector<int> & fvarWidths)
{
MStatus returnStatus;
// == Mesh Properties
// Gather FVarData
MStringArray uvSetNames;
MStringArray colorSetNames;
std::vector<int> colorSetChannels;
std::vector<MFnMesh::MColorRepresentation> colorSetReps;
int totalColorSetChannels = 0;
returnStatus = getMayaFvarFieldParams(inMeshFn, uvSetNames, colorSetNames, colorSetChannels, colorSetReps, totalColorSetChannels);
MWARNERR(returnStatus, "Failed to retrieve Maya face-varying parameters");
// Create face-varying data with independent float channels of dimension 1
// Note: This FVarData needs to be kept around for the duration of the HBR mesh
int totalFvarWidth = 2*uvSetNames.length() + totalColorSetChannels;
fvarIndices.resize(totalFvarWidth);
fvarWidths.resize(totalFvarWidth);
for (int i=0; i < totalFvarWidth; ++i) {
fvarIndices[i] = i;
fvarWidths[i] = 1;
}
// temp storage for UVs and ColorSets for a face
MIntArray fvArray; // face vertex array
std::vector<MFloatArray> uvSet_uCoords(uvSetNames.length());
std::vector<MFloatArray> uvSet_vCoords(uvSetNames.length());
std::vector<MColorArray> colorSet_colors(colorSetNames.length());
// =====================================
// Init HBR
// =====================================
// Determine HBR Subdiv Method
static HCatmark _catmark;
// Create HBR mesh
assert(fvarIndices.size() == fvarWidths.size());
HMesh * hbrMesh = new HMesh( &_catmark,
(int)fvarIndices.size(),
(fvarIndices.size() > 0) ? &fvarIndices[0] : NULL,
(fvarWidths.size() > 0) ? &fvarWidths[0] : NULL,
totalFvarWidth );
// Create Stub HBR Vertices
int numVerts = inMeshFn.numVertices();
OpenSubdiv::OsdVertex v;
for(int i=0; i<numVerts; i++ ) {
hbrMesh->NewVertex( i, v );
}
// ===================================================
// Create HBR Topology
// ===================================================
assert(totalFvarWidth == hbrMesh->GetTotalFVarWidth());
unsigned int ptxidx = 0;
for( inMeshItPolygon.reset(); !inMeshItPolygon.isDone(); inMeshItPolygon.next() ) {
// Verts for this face
inMeshItPolygon.getVertices(fvArray);
unsigned int nv = fvArray.length();
bool valid = true;
for(unsigned int j=0;j<fvArray.length(); j++) {
HVertex const * origin = hbrMesh->GetVertex( fvArray[j] ),
* destination = hbrMesh->GetVertex( fvArray[(j+1)%nv] );
HHalfedge const * opposite = destination->GetEdge(origin);
if(origin==NULL || destination==NULL) {
fprintf(stderr, "Skipping face: An edge was specified that connected a nonexistent vertex\n");
valid = false;
break;
}
if(origin == destination) {
fprintf(stderr, "Skipping face: An edge was specified that connected a vertex to itself\n");
valid = false;
break;
}
if(opposite && opposite->GetOpposite() ) {
fprintf(stderr, "Skipping face: A non-manifold edge incident to more than 2 faces was found\n");
valid = false;
break;
}
if(origin->GetEdge(destination)) {
fprintf(stderr, "Skipping face: An edge connecting two vertices was specified more than once."
" It's likely that an incident face was flipped\n");
valid = false;
break;
}
}
// Update faces
const int * fvArrayPtr = &(fvArray[0]); // get the raw int* array from std::vector<int>
OpenSubdiv::HbrFace<OpenSubdiv::OsdVertex> * face = hbrMesh->NewFace(nv, fvArrayPtr, 0);
// Increment ptex index
face->SetPtexIndex(ptxidx);
// Add FaceVaryingData (UVSets, ...)
if (totalFvarWidth > 0) {
// Retrieve all UV and ColorSet data
MIntArray faceCounts;
for (unsigned int i=0; i < uvSetNames.length(); ++i) {
returnStatus = inMeshItPolygon.getUVs(uvSet_uCoords[i], uvSet_vCoords[i], &uvSetNames[i] );
MWARNERR(returnStatus, "Cannot get UVs");
}
for (unsigned int i=0; i < colorSetNames.length(); ++i) {
returnStatus = inMeshItPolygon.getColors (colorSet_colors[i], &colorSetNames[i]);
MWARNERR(returnStatus, "Cannot get face vertex colors");
}
std::vector<float> fvarItem(totalFvarWidth); // storage for all the face-varying channels for this face-vertex
// loop over each uvSet and the uvs within
for (unsigned int fvid=0; fvid < fvArray.length(); ++fvid) {
int fvarItemIndex = 0;
// Handle uvSets
for( unsigned int uvSetIt=0; uvSetIt < uvSetNames.length(); ++uvSetIt ) {
fvarItem[fvarItemIndex] = uvSet_uCoords[uvSetIt][fvid];
fvarItem[fvarItemIndex+1] = uvSet_vCoords[uvSetIt][fvid];
fvarItemIndex +=2;
}
// Handle colorSets
for( unsigned int colorSetIt=0; colorSetIt < colorSetNames.length(); ++colorSetIt ) {
if (colorSetChannels[colorSetIt] == 1) {
fvarItem[fvarItemIndex] = colorSet_colors[colorSetIt][fvid].a;
}
else if (colorSetChannels[colorSetIt] == 3) {
fvarItem[fvarItemIndex] = colorSet_colors[colorSetIt][fvid].r;
fvarItem[fvarItemIndex+1] = colorSet_colors[colorSetIt][fvid].g;
fvarItem[fvarItemIndex+2] = colorSet_colors[colorSetIt][fvid].b;
}
else { // colorSetChannels[colorSetIt] == 4
fvarItem[fvarItemIndex] = colorSet_colors[colorSetIt][fvid].r;
fvarItem[fvarItemIndex+1] = colorSet_colors[colorSetIt][fvid].g;
fvarItem[fvarItemIndex+2] = colorSet_colors[colorSetIt][fvid].b;
fvarItem[fvarItemIndex+3] = colorSet_colors[colorSetIt][fvid].a;
}
fvarItemIndex += colorSetChannels[colorSetIt];
}
assert((fvarItemIndex) == totalFvarWidth); // For UVs, sanity check the resulting value
// Insert into the HBR structure for that face
HVertex * hbrVertex = hbrMesh->GetVertex( fvArray[fvid] );
HFvarData & fvarData = hbrVertex->GetFVarData(face);
if (not fvarData.IsInitialized()) {
fvarData.SetAllData(totalFvarWidth, &fvarItem[0]);
} else if (not fvarData.CompareAll(totalFvarWidth, &fvarItem[0])) {
// If data exists for this face vertex, but is different
// (e.g. we're on a UV seam) create another fvar datum
OpenSubdiv::HbrFVarData<OpenSubdiv::OsdVertex> &fvarData_new = hbrVertex->NewFVarData(face);
fvarData_new.SetAllData( totalFvarWidth, &fvarItem[0] );
}
}
}
// Increment ptxidx and store off ptex index values
// The number of ptexIds needed is 1 if a quad. Otherwise it is the number of
// vertices for the face.
int numPtexIdsForFace;
if (valid) {
numPtexIdsForFace = ( nv != 4 ) ? nv : 1 ;
}
else {
numPtexIdsForFace = 0;
}
ptxidx += numPtexIdsForFace;
}
// Apply Creases
applyCreaseEdges( inMeshFn, hbrMesh );
applyCreaseVertices( inMeshFn, hbrMesh );
// Return the resulting HBR Mesh
// Note that boundaryMethods and hbrMesh->Finish() still need to be called
return hbrMesh;
}
//! Caller is expected to delete the returned value
static OpenSubdiv::Far::TopologyRefiner *
gatherTopology( MFnMesh const & inMeshFn,
MItMeshPolygon & inMeshItPolygon,
OpenSubdiv::Sdc::SchemeType type,
OpenSubdiv::Sdc::Options options,
float * maxCreaseSharpness=0 ) {
MStatus returnStatus;
// Gather FVarData
MStringArray uvSetNames;
MStringArray colorSetNames;
std::vector<int> colorSetChannels;
std::vector<MFnMesh::MColorRepresentation> colorSetReps;
int totalColorSetChannels = 0;
returnStatus = getMayaFvarFieldParams(inMeshFn, uvSetNames, colorSetNames, colorSetChannels, colorSetReps, totalColorSetChannels);
MWARNERR(returnStatus, "Failed to retrieve Maya face-varying parameters");
// Create face-varying data with independent float channels of dimension 1
// Note: This FVarData needs to be kept around for the duration of the HBR mesh
int totalFvarWidth = 2*uvSetNames.length() + totalColorSetChannels;
// temp storage for UVs and ColorSets for a face
MIntArray fvArray; // face vertex array
std::vector<MFloatArray> uvSet_uCoords(uvSetNames.length());
std::vector<MFloatArray> uvSet_vCoords(uvSetNames.length());
std::vector<MColorArray> colorSet_colors(colorSetNames.length());
Descriptor desc;
desc.numVertices = inMeshFn.numVertices();
desc.numFaces = inMeshItPolygon.count();
int * vertsPerFace = new int[desc.numFaces],
* vertIndices = new int[inMeshFn.numFaceVertices()];
desc.numVertsPerFace = vertsPerFace;
desc.vertIndicesPerFace = vertIndices;
// Create Topology
for( inMeshItPolygon.reset(); !inMeshItPolygon.isDone(); inMeshItPolygon.next() ) {
inMeshItPolygon.getVertices(fvArray);
int nverts = fvArray.length();
vertsPerFace[inMeshItPolygon.index()] = nverts;
for (int i=0; i<nverts; ++i) {
*vertIndices++ = fvArray[i];
}
// Add FaceVaryingData (UVSets, ...)
if (totalFvarWidth > 0) {
// XXXX
// Retrieve all UV and ColorSet topology
for (unsigned int i=0; i < uvSetNames.length(); ++i) {
inMeshItPolygon.getUVs(uvSet_uCoords[i], uvSet_vCoords[i], &uvSetNames[i] );
}
for (unsigned int i=0; i < colorSetNames.length(); ++i) {
inMeshItPolygon.getColors(colorSet_colors[i], &colorSetNames[i]);
}
// Handle uvSets
for (unsigned int fvid=0; fvid < fvArray.length(); ++fvid) {
}
// Handle colorSets
for( unsigned int colorSetIt=0; colorSetIt < colorSetNames.length(); ++colorSetIt ) {
}
}
}
// Apply Creases
float maxEdgeCrease = getCreaseEdges( inMeshFn, desc );
float maxVertexCrease = getCreaseVertices( inMeshFn, desc );
OpenSubdiv::Far::TopologyRefiner * refiner =
OpenSubdiv::Far::TopologyRefinerFactory<Descriptor>::Create(desc,
OpenSubdiv::Far::TopologyRefinerFactory<Descriptor>::Options(type, options));
delete [] desc.numVertsPerFace;
delete [] desc.vertIndicesPerFace;
delete [] desc.creaseVertexIndexPairs;
delete [] desc.creaseWeights;
delete [] desc.cornerVertexIndices;
delete [] desc.cornerWeights;
if (maxCreaseSharpness) {
*maxCreaseSharpness = std::max(maxEdgeCrease, maxVertexCrease);
}
return refiner;
}
