//------------------------------------------------------------------------------
// generate display IDs for Vtr verts
static void
createVertNumbers(OpenSubdiv::Far::TopologyRefiner const & refiner,
std::vector<Vertex> const & vertexBuffer) {
int maxlevel = refiner.GetMaxLevel(),
firstvert = 0;
if (refiner.IsUniform()) {
for (int i=0; i<maxlevel; ++i) {
firstvert += refiner.GetNumVertices(i);
}
}
static char buf[16];
if (refiner.IsUniform()) {
for (int i=firstvert; i<(int)vertexBuffer.size(); ++i) {
snprintf(buf, 16, "%d", i);
g_font->Print3D(vertexBuffer[i].GetPos(), buf, 1);
}
} else {
for (int level=0, vert=0; level<=refiner.GetMaxLevel(); ++level) {
for (int i=0; i<refiner.GetNumVertices(level); ++i, ++vert) {
snprintf(buf, 16, "%d", i);
g_font->Print3D(vertexBuffer[vert].GetPos(), buf, 1);
}
}
}
}
//------------------------------------------------------------------------------
// generate display IDs for Far faces
static void
createFaceNumbers(OpenSubdiv::Far::TopologyRefiner const & refiner,
std::vector<Vertex> const & vertexBuffer) {
static char buf[16];
if (refiner.IsUniform()) {
int maxlevel = refiner.GetMaxLevel(),
firstvert = 0;
for (int i=0; i<maxlevel; ++i) {
firstvert += refiner.GetLevel(i).GetNumVertices();
}
OpenSubdiv::Far::TopologyLevel const & refLastLevel = refiner.GetLevel(maxlevel);
for (int face=0; face<refLastLevel.GetNumFaces(); ++face) {
Vertex center(0.0f, 0.0f, 0.0f);
OpenSubdiv::Far::ConstIndexArray const verts = refLastLevel.GetFaceVertices(face);
float weight = 1.0f / (float)verts.size();
for (int vert=0; vert<verts.size(); ++vert) {
center.AddWithWeight(vertexBuffer[firstvert+verts[vert]], weight);
}
snprintf(buf, 16, "%d", face);
g_font->Print3D(center.GetPos(), buf, 2);
}
} else {
int maxlevel = refiner.GetMaxLevel(),
// patch = refiner.GetLevel(0).GetNumFaces(),
firstvert = refiner.GetLevel(0).GetNumVertices();
for (int level=1; level<=maxlevel; ++level) {
OpenSubdiv::Far::TopologyLevel const & refLevel = refiner.GetLevel(level);
int nfaces = refLevel.GetNumFaces();
for (int face=0; face<nfaces; ++face /*, ++patch */) {
Vertex center(0.0f, 0.0f, 0.0f);
OpenSubdiv::Far::ConstIndexArray const verts = refLevel.GetFaceVertices(face);
float weight = 1.0f / (float)verts.size();
for (int vert=0; vert<verts.size(); ++vert) {
center.AddWithWeight(vertexBuffer[firstvert+verts[vert]], weight);
}
snprintf(buf, 16, "%d", face);
g_font->Print3D(center.GetPos(), buf, 2);
}
firstvert+=refLevel.GetNumVertices();
}
}
}
void
InterpolateFVarData(OpenSubdiv::Far::TopologyRefiner & refiner,
Shape const & shape, std::vector<float> & fvarData) {
int channel = 0, // shapes only have 1 UV channel
fvarWidth = 2;
int maxlevel = refiner.GetMaxLevel(),
numValuesM = refiner.GetLevel(maxlevel).GetNumFVarValues(channel),
numValuesTotal = refiner.GetNumFVarValuesTotal(channel);
if (shape.uvs.empty() || numValuesTotal<=0) {
return;
}
OpenSubdiv::Far::PrimvarRefiner primvarRefiner(refiner);
if (refiner.IsUniform()) {
// For uniform we only keep the highest level of refinement:
fvarData.resize(numValuesM * fvarWidth);
std::vector<FVarVertex> buffer(numValuesTotal - numValuesM);
FVarVertex * src = &buffer[0];
memcpy(src, &shape.uvs[0], shape.uvs.size()*sizeof(float));
// Defer the last level to treat separately with its alternate destination:
for (int level = 1; level < maxlevel; ++level) {
FVarVertex * dst = src + refiner.GetLevel(level-1).GetNumFVarValues(channel);
primvarRefiner.InterpolateFaceVarying(level, src, dst, channel);
src = dst;
}
FVarVertex * dst = reinterpret_cast<FVarVertex *>(&fvarData[0]);
primvarRefiner.InterpolateFaceVarying(maxlevel, src, dst, channel);
} else {
// For adaptive we keep all levels:
fvarData.resize(numValuesTotal * fvarWidth);
FVarVertex * src = reinterpret_cast<FVarVertex *>(&fvarData[0]);
memcpy(src, &shape.uvs[0], shape.uvs.size()*sizeof(float));
for (int level = 1; level <= maxlevel; ++level) {
FVarVertex * dst = src + refiner.GetLevel(level-1).GetNumFVarValues(channel);
primvarRefiner.InterpolateFaceVarying(level, src, dst, channel);
src = dst;
}
}
}