//------------------------------------------------------------------------------
static Far::TopologyRefiner const *
createTopologyRefiner(int maxlevel) {
// Populate a topology descriptor with our raw data
typedef Far::TopologyRefinerFactoryBase::TopologyDescriptor Descriptor;
Sdc::Type type = OpenSubdiv::Sdc::TYPE_CATMARK;
Sdc::Options options;
options.SetVVarBoundaryInterpolation(Sdc::Options::VVAR_BOUNDARY_EDGE_ONLY);
Descriptor desc;
desc.numVertices = g_nverts;
desc.numFaces = g_nfaces;
desc.vertsPerFace = g_vertsperface;
desc.vertIndices = g_vertIndices;
// Instantiate a FarTopologyRefiner from the descriptor
Far::TopologyRefiner * refiner =
Far::TopologyRefinerFactory<Descriptor>::Create(type, options, desc);
// Uniformly refine the topolgy up to 'maxlevel'
refiner->RefineUniform( maxlevel );
return refiner;
}
//------------------------------------------------------------------------------
int main(int, char **) {
// Generate some FarTopologyRefiner (see far_tutorial_0 for details).
Far::TopologyRefiner * refiner = createTopologyRefiner();
// Uniformly refine the topolgy up to 'maxlevel'.
int maxlevel = 4;
refiner->RefineUniform(Far::TopologyRefiner::UniformOptions(maxlevel));
// Use the FarStencilTable factory to create cascading stencil table
// note: we want stencils for the each refinement level
// "cascade" mode is achieved by setting "factorizeIntermediateLevels"
// to false
Far::StencilTableFactory::Options options;
options.generateIntermediateLevels=true;
options.factorizeIntermediateLevels=false;
options.generateOffsets=true;
Far::StencilTable const * stencilTable =
Far::StencilTableFactory::Create(*refiner, options);
std::vector<Vertex> vertexBuffer(refiner->GetNumVerticesTotal()-g_nverts);
Vertex * destVerts = &vertexBuffer[0];
int start = 0, end = 0; // stencils batches for each level of subdivision
for (int level=0; level<maxlevel; ++level) {
int nverts = refiner->GetLevel(level+1).GetNumVertices();
Vertex const * srcVerts = reinterpret_cast<Vertex *>(g_verts);
if (level>0) {
srcVerts = &vertexBuffer[start];
}
start = end;
end += nverts;
stencilTable->UpdateValues(srcVerts, destVerts, start, end);
// apply 2 hierarchical edits on level 1 vertices
if (level==1) {
float * pos = destVerts[start+5].GetPosition();
pos[1] += 0.5f;
pos = destVerts[start+20].GetPosition();
pos[0] += 0.25f;
}
}
{ // Output OBJ of the highest level refined -----------
Vertex * verts = &vertexBuffer[0];
// Print vertex positions
for (int level=1, firstvert=0; level<=maxlevel; ++level) {
Far::TopologyLevel const & refLevel = refiner->GetLevel(level);
printf("g level_%d\n", level);
int nverts = refLevel.GetNumVertices();
for (int vert=0; vert<nverts; ++vert) {
float const * pos = verts[vert].GetPosition();
printf("v %f %f %f\n", pos[0], pos[1], pos[2]);
}
verts += nverts;
// Print faces
for (int face=0; face<refLevel.GetNumFaces(); ++face) {
Far::ConstIndexArray fverts = refLevel.GetFaceVertices(face);
// all refined Catmark faces should be quads
assert(fverts.size()==4);
printf("f ");
for (int vert=0; vert<fverts.size(); ++vert) {
printf("%d ", fverts[vert]+firstvert+1); // OBJ uses 1-based arrays...
}
printf("\n");
}
firstvert+=nverts;
}
}
delete refiner;
delete stencilTable;
}
//------------------------------------------------------------------------------
static void
createFarGLMesh(Shape * shape, int maxlevel) {
Stopwatch s;
s.Start();
using namespace OpenSubdiv;
// create Far mesh (topology)
Sdc::SchemeType sdctype = GetSdcType(*shape);
Sdc::Options sdcoptions = GetSdcOptions(*shape);
sdcoptions.SetFVarLinearInterpolation(g_fvarInterpolation);
Far::TopologyRefiner * refiner =
Far::TopologyRefinerFactory<Shape>::Create(*shape,
Far::TopologyRefinerFactory<Shape>::Options(sdctype, sdcoptions));
if (g_Adaptive) {
Far::TopologyRefiner::AdaptiveOptions options(maxlevel);
options.useSingleCreasePatch = false;
refiner->RefineAdaptive(options);
} else {
Far::TopologyRefiner::UniformOptions options(maxlevel);
options.fullTopologyInLastLevel = true;
refiner->RefineUniform(options);
}
int numTotalVerts = refiner->GetNumVerticesTotal();
//
// Patch table
//
std::vector<Vertex> fvarBuffer;
Far::PatchTable * patchTable = 0;
bool createFVarWire = g_FarDrawFVarPatches or g_FarDrawFVarVerts;
if (g_Adaptive) {
Far::PatchTableFactory::Options options;
options.generateFVarTables = createFVarWire;
options.shareEndCapPatchPoints = false;
patchTable =
Far::PatchTableFactory::Create(*refiner, options);
// increase vertex buffer for the additional local points
if (patchTable->GetLocalPointStencilTable()) {
numTotalVerts += patchTable->GetLocalPointStencilTable()->GetNumStencils();
}
g_numPatches = patchTable->GetNumPatchesTotal();
g_maxValence = patchTable->GetMaxValence();
if (createFVarWire) {
// interpolate fvar values
int channel = 0;
// XXXX should use a (u,v) vertex class
fvarBuffer.resize(refiner->GetNumFVarValuesTotal(channel), 0);
Vertex * values = &fvarBuffer[0];
int nCoarseValues = refiner->GetLevel(0).GetNumFVarValues(channel);
for (int i=0; i<nCoarseValues; ++i) {
float const * ptr = &shape->uvs[i*2];
values[i].SetPosition(ptr[0], ptr[1], 0.0f);
}
int lastLevel = refiner->GetMaxLevel();
Vertex * src = values;
for (int level = 1; level <= lastLevel; ++level) {
Vertex * dst = src + refiner->GetLevel(level-1).GetNumFVarValues(channel);
Far::PrimvarRefiner(*refiner).InterpolateFaceVarying(level, src, dst, channel);
src = dst;
}
}
}
//
// interpolate vertices
//
// create vertex primvar data buffer
std::vector<Vertex> vertexBuffer(numTotalVerts);
Vertex * verts = &vertexBuffer[0];
// copy coarse vertices positions
int ncoarseverts = shape->GetNumVertices();
for (int i=0; i<ncoarseverts; ++i) {
float * ptr = &shape->verts[i*3];
verts[i].SetPosition(ptr[0], ptr[1], ptr[2]);
}
s.Start();
if (g_useStencils) {
//
// Stencil interpolation
//
Far::StencilTable const * stencilTable = 0;
Far::StencilTableFactory::Options options;
options.generateOffsets=true;
options.generateIntermediateLevels=true;
stencilTable = Far::StencilTableFactory::Create(*refiner, options);
// append local point stencils if needed
if (patchTable and patchTable->GetLocalPointStencilTable()) {
if (Far::StencilTable const * stencilTableWithLocalPoints =
Far::StencilTableFactory::AppendLocalPointStencilTable(
*refiner, stencilTable,
patchTable->GetLocalPointStencilTable())) {
delete stencilTable;
stencilTable = stencilTableWithLocalPoints;
}
}
//
// apply stencils
//
stencilTable->UpdateValues(verts, verts + ncoarseverts);
delete stencilTable;
} else {
//
// TopologyRefiner interpolation
//
// populate buffer with Far interpolated vertex data
int lastLevel = refiner->GetMaxLevel();
Vertex * src = verts;
for (int level = 1; level <= lastLevel; ++level) {
Vertex * dst = src + refiner->GetLevel(level-1).GetNumVertices();
Far::PrimvarRefiner(*refiner).Interpolate(level, src, dst);
src = dst;
}
//printf(" %f ms (interpolate)\n", float(s.GetElapsed())*1000.0f);
//printf(" %f ms (total)\n", float(s.GetTotalElapsed())*1000.0f);
// TODO: endpatch basis conversion comes here
}
s.Stop();
//
// Misc display
//
//printf("Far time: %f ms (topology)\n", float(s.GetElapsed())*1000.0f);
if (g_FarDrawVertIDs) {
createVertNumbers(*refiner, vertexBuffer);
}
if (g_FarDrawFaceIDs) {
createFaceNumbers(*refiner, vertexBuffer);
}
if (g_FarDrawPtexIDs and patchTable) {
createPtexNumbers(*patchTable, vertexBuffer);
}
if (g_Adaptive) {
createPatchNumbers(*patchTable, vertexBuffer);
}
if (g_Adaptive and g_FarDrawGregogyBasis) {
createGregoryBasis(*patchTable, vertexBuffer);
}
if (g_Adaptive and createFVarWire) {
createFVarPatches(*refiner, *patchTable, fvarBuffer);
createFVarPatchNumbers(*patchTable, fvarBuffer);
}
createEdgeNumbers(*refiner, vertexBuffer, g_FarDrawEdgeIDs!=0, g_FarDrawEdgeSharpness!=0);
GLMesh::Options options;
options.vertColorMode=g_Adaptive ? GLMesh::VERTCOLOR_BY_LEVEL : GLMesh::VERTCOLOR_BY_SHARPNESS;
options.edgeColorMode=g_Adaptive ? GLMesh::EDGECOLOR_BY_PATCHTYPE : GLMesh::EDGECOLOR_BY_SHARPNESS;
options.faceColorMode=g_Adaptive ? GLMesh::FACECOLOR_BY_PATCHTYPE :GLMesh::FACECOLOR_SOLID;
g_far_glmesh.Initialize(options, *refiner, patchTable, (float *)&verts[0]);
if (g_Adaptive) {
g_far_glmesh.SetDiffuseColor(1.0f, 1.0f, 1.0f, 1.0f);
} else {
g_far_glmesh.SetDiffuseColor(0.75f, 0.9f, 1.0f, 1.0f);
}
//setFaceColors(*refiner);
g_far_glmesh.InitializeDeviceBuffers();
// save coarse topology (used for control mesh display)
g_controlMeshDisplay.SetTopology(refiner->GetLevel(0));
// save coarse points in a GPU buffer (used for control mesh display)
if (not g_controlMeshDisplayVBO) {
glGenBuffers(1, &g_controlMeshDisplayVBO);
}
glBindBuffer(GL_ARRAY_BUFFER, g_controlMeshDisplayVBO);
glBufferData(GL_ARRAY_BUFFER,
3*sizeof(float)*vertexBuffer.size(), (GLfloat*)&vertexBuffer[0],
GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
// compute model bounds
float min[3] = { FLT_MAX, FLT_MAX, FLT_MAX};
float max[3] = {-FLT_MAX, -FLT_MAX, -FLT_MAX};
for (size_t i=0; i <vertexBuffer.size(); ++i) {
for(int j=0; j<3; ++j) {
float v = vertexBuffer[i].GetPos()[j];
min[j] = std::min(min[j], v);
max[j] = std::max(max[j], v);
}
}
for (int j=0; j<3; ++j) {
g_center[j] = (min[j] + max[j]) * 0.5f;
g_size += (max[j]-min[j])*(max[j]-min[j]);
}
g_size = sqrtf(g_size);
delete refiner;
delete patchTable;
}
//------------------------------------------------------------------------------
int main(int, char **) {
// Generate some FarTopologyRefiner (see far_tutorial_0 for details).
Far::TopologyRefiner * refiner = createTopologyRefiner();
// Uniformly refine the topolgy up to 'maxlevel'.
int maxlevel = 4;
refiner->RefineUniform(Far::TopologyRefiner::UniformOptions(maxlevel));
int nverts = refiner->GetLevel(maxlevel).GetNumVertices();
// Use the Far::StencilTable factory to create discrete stencil table
Far::StencilTableFactory::Options options;
options.generateIntermediateLevels=false; // only the highest refinement level.
options.generateOffsets=true;
//
// Vertex primvar data
//
// Create stencils table for 'vertex' interpolation
options.interpolationMode=Far::StencilTableFactory::INTERPOLATE_VERTEX;
Far::StencilTable const * vertexStencils =
Far::StencilTableFactory::Create(*refiner, options);
assert(nverts==vertexStencils->GetNumStencils());
// Allocate vertex primvar buffer (1 stencil for each vertex)
std::vector<Vertex> vertexBuffer(vertexStencils->GetNumStencils());
// Use the cube vertex positions as 'vertex' primvar data
Vertex * vertexCVs = reinterpret_cast<Vertex *>(g_verts);
//
// Varying primvar data
//
// Create stencils table for 'varying' interpolation
options.interpolationMode=Far::StencilTableFactory::INTERPOLATE_VARYING;
Far::StencilTable const * varyingStencils =
Far::StencilTableFactory::Create(*refiner, options);
assert(nverts==varyingStencils->GetNumStencils());
// Allocate varying primvar buffer (1 stencil for each vertex)
std::vector<Vertex> varyingBuffer(varyingStencils->GetNumStencils());
// Use the a per-vertex array of RGB colors as 'varying' primvar data
Vertex * varyingCVs = reinterpret_cast<Vertex *>(g_colors);
delete refiner;
//
// Apply stencils (in frame loop)
//
{ // This section would be applied every frame after control vertices have
// been moved.
// Apply stencils on the control vertex data to update the primvar data
// of the refined vertices.
vertexStencils->UpdateValues(vertexCVs, &vertexBuffer[0]);
varyingStencils->UpdateValues(varyingCVs, &varyingBuffer[0]);
}
{ // Visualization with Maya : print a MEL script that generates particles
// at the location of the refined vertices
printf("particle ");
for (int vert=0; vert<(int)nverts; ++vert) {
float const * pos = vertexBuffer[vert].GetData();
printf("-p %f %f %f\n", pos[0], pos[1], pos[2]);
}
printf("-c 1;\n");
// Set particle point size (20 -- very large)
printf("addAttr -is true -ln \"pointSize\" -at long -dv 20 particleShape1;\n");
// Add per-particle color attribute ('rgbPP')
printf("addAttr -ln \"rgbPP\" -dt vectorArray particleShape1;\n");
// Set per-particle color values from our 'varying' primvar data
printf("setAttr \"particleShape1.rgbPP\" -type \"vectorArray\" %d ", nverts);
for (int vert=0; vert<nverts; ++vert) {
float const * color = varyingBuffer[vert].GetData();
printf("%f %f %f\n", color[0], color[1], color[2]);
}
printf(";\n");
}
delete vertexStencils;
delete varyingStencils;
}
//------------------------------------------------------------------------------
int main(int, char **) {
int maxlevel = 3;
typedef Far::TopologyRefinerFactoryBase::TopologyDescriptor Descriptor;
Sdc::SchemeType type = OpenSubdiv::Sdc::SCHEME_CATMARK;
Sdc::Options options;
options.SetVtxBoundaryInterpolation(Sdc::Options::VTX_BOUNDARY_EDGE_ONLY);
options.SetFVarLinearInterpolation(Sdc::Options::FVAR_LINEAR_NONE);
// Populate a topology descriptor with our raw data
Descriptor desc;
desc.numVertices = g_nverts;
desc.numFaces = g_nfaces;
desc.numVertsPerFace = g_vertsperface;
desc.vertIndicesPerFace = g_vertIndices;
// Create a face-varying channel descriptor
Descriptor::FVarChannel uvs;
uvs.numValues = g_nuvs;
uvs.valueIndices = g_uvIndices;
// Add the channel topology to the main descriptor
desc.numFVarChannels = 1;
desc.fvarChannels = & uvs;
// Instantiate a FarTopologyRefiner from the descriptor
Far::TopologyRefiner * refiner =
Far::TopologyRefinerFactory<Descriptor>::Create(desc,
Far::TopologyRefinerFactory<Descriptor>::Options(type, options));
// Uniformly refine the topolgy up to 'maxlevel'
// note: fullTopologyInLastLevel must be true to work with face-varying data
{
Far::TopologyRefiner::UniformOptions options(maxlevel);
options.fullTopologyInLastLevel = true;
refiner->RefineUniform(options);
}
// Allocate & interpolate the 'vertex' primvar data (see tutorial 2 for
// more details).
std::vector<Vertex> vbuffer(refiner->GetNumVerticesTotal());
Vertex * verts = &vbuffer[0];
int nCoarseVerts = g_nverts;
for (int i=0; i<nCoarseVerts; ++i) {
verts[i].SetPosition(g_verts[i][0], g_verts[i][1], g_verts[i][2]);
}
refiner->Interpolate(verts, verts + nCoarseVerts);
// Allocate & interpolate the 'face-varying' primvar data
int channel = 0,
nCoarseFVVerts = refiner->GetNumFVarValues(0, channel);
std::vector<FVarVertex> fvBuffer(refiner->GetNumFVarValuesTotal(channel));
FVarVertex * fvVerts = &fvBuffer[0];
for (int i=0; i<g_nuvs; ++i) {
fvVerts[i].u = g_uvs[i][0];
fvVerts[i].v = g_uvs[i][1];
}
refiner->InterpolateFaceVarying(fvVerts, fvVerts + nCoarseFVVerts, channel);
{ // Output OBJ of the highest level refined -----------
// Print vertex positions
for (int level=0, firstVert=0; level<=maxlevel; ++level) {
if (level==maxlevel) {
for (int vert=0; vert<refiner->GetNumVertices(level); ++vert) {
float const * pos = verts[firstVert+vert].GetPosition();
printf("v %f %f %f\n", pos[0], pos[1], pos[2]);
}
} else {
firstVert += refiner->GetNumVertices(level);
}
}
// Print uvs
for (int level=0, firstVert=0; level<=maxlevel; ++level) {
if (level==maxlevel) {
for (int vert=0; vert<refiner->GetNumFVarValues(level, channel); ++vert) {
FVarVertex const & uv = fvVerts[firstVert+vert];
printf("vt %f %f\n", uv.u, uv.v);
}
} else {
firstVert += refiner->GetNumFVarValues(level, channel);
}
}
// Print faces
for (int face=0; face<refiner->GetNumFaces(maxlevel); ++face) {
Far::ConstIndexArray fverts = refiner->GetFaceVertices(maxlevel, face),
fvverts = refiner->GetFVarFaceValues(maxlevel, face, channel);
// all refined Catmark faces should be quads
assert(fverts.size()==4 and fvverts.size()==4);
printf("f ");
for (int vert=0; vert<fverts.size(); ++vert) {
// OBJ uses 1-based arrays...
printf("%d/%d ", fverts[vert]+1, fvverts[vert]+1);
}
printf("\n");
}
}
}
//------------------------------------------------------------------------------
static void
createOsdMesh(ShapeDesc const & shapeDesc, int level) {
Shape * shape = Shape::parseObj(shapeDesc.data.c_str(), shapeDesc.scheme);
// create Far mesh (topology)
OpenSubdiv::Sdc::SchemeType sdctype = GetSdcType(*shape);
OpenSubdiv::Sdc::Options sdcoptions = GetSdcOptions(*shape);
Far::TopologyRefiner *topologyRefiner =
OpenSubdiv::Far::TopologyRefinerFactory<Shape>::Create(*shape,
OpenSubdiv::Far::TopologyRefinerFactory<Shape>::Options(sdctype, sdcoptions));
g_orgPositions=shape->verts;
g_positions.resize(g_orgPositions.size(), 0.0f);
delete shape;
float speed = g_particles ? g_particles->GetSpeed() : 0.2f;
// save coarse topology (used for coarse mesh drawing)
g_controlMeshDisplay.SetTopology(topologyRefiner->GetLevel(0));
// create random varying color
{
int numCoarseVerts = topologyRefiner->GetLevel(0).GetNumVertices();
g_varyingColors.resize(numCoarseVerts*3);
createRandomColors(numCoarseVerts, 3, &g_varyingColors[0]);
}
Far::StencilTable const * vertexStencils = NULL;
Far::StencilTable const * varyingStencils = NULL;
int nverts=0;
{
bool adaptive = (sdctype == OpenSubdiv::Sdc::SCHEME_CATMARK);
if (adaptive) {
// Apply feature adaptive refinement to the mesh so that we can use the
// limit evaluation API features.
Far::TopologyRefiner::AdaptiveOptions options(level);
topologyRefiner->RefineAdaptive(options);
} else {
Far::TopologyRefiner::UniformOptions options(level);
topologyRefiner->RefineUniform(options);
}
// Generate stencil table to update the bi-cubic patches control
// vertices after they have been re-posed (both for vertex & varying
// interpolation)
Far::StencilTableFactory::Options soptions;
soptions.generateOffsets=true;
soptions.generateIntermediateLevels=adaptive;
vertexStencils =
Far::StencilTableFactory::Create(*topologyRefiner, soptions);
soptions.interpolationMode = Far::StencilTableFactory::INTERPOLATE_VARYING;
varyingStencils =
Far::StencilTableFactory::Create(*topologyRefiner, soptions);
// Generate bi-cubic patch table for the limit surface
Far::PatchTableFactory::Options poptions;
if (g_endCap == kEndCapBSplineBasis) {
poptions.SetEndCapType(
Far::PatchTableFactory::Options::ENDCAP_BSPLINE_BASIS);
} else {
poptions.SetEndCapType(
Far::PatchTableFactory::Options::ENDCAP_GREGORY_BASIS);
}
Far::PatchTable const * patchTable =
Far::PatchTableFactory::Create(*topologyRefiner, poptions);
// append local points stencils
if (Far::StencilTable const *localPointStencilTable =
patchTable->GetLocalPointStencilTable()) {
Far::StencilTable const *table =
Far::StencilTableFactory::AppendLocalPointStencilTable(
*topologyRefiner, vertexStencils, localPointStencilTable);
delete vertexStencils;
vertexStencils = table;
}
if (Far::StencilTable const *localPointVaryingStencilTable =
patchTable->GetLocalPointVaryingStencilTable()) {
Far::StencilTable const *table =
Far::StencilTableFactory::AppendLocalPointStencilTable(
*topologyRefiner,
varyingStencils, localPointVaryingStencilTable);
delete varyingStencils;
varyingStencils = table;
}
// total number of vertices = coarse verts + refined verts + gregory basis verts
nverts = vertexStencils->GetNumControlVertices() +
vertexStencils->GetNumStencils();
if (g_patchTable) delete g_patchTable;
g_patchTable = patchTable;
}
// note that for patch eval we need coarse+refined combined buffer.
int nCoarseVertices = topologyRefiner->GetLevel(0).GetNumVertices();
// In following template instantiations, same type of vertex buffers are
// used for both source and destination (first and second template
// parameters), since we'd like to draw control mesh wireframe too in
// this example viewer.
// If we don't need to draw the coarse control mesh, the src buffer doesn't
// have to be interoperable to GL (it can be CpuVertexBuffer etc).
delete g_evalOutput;
if (g_kernel == kCPU) {
g_evalOutput = new EvalOutput<Osd::CpuGLVertexBuffer,
Osd::CpuGLVertexBuffer,
Far::StencilTable,
Osd::CpuPatchTable,
Osd::CpuEvaluator>
(vertexStencils, varyingStencils,
nCoarseVertices, nverts, g_nParticles, g_patchTable);
#ifdef OPENSUBDIV_HAS_OPENMP
} else if (g_kernel == kOPENMP) {
g_evalOutput = new EvalOutput<Osd::CpuGLVertexBuffer,
Osd::CpuGLVertexBuffer,
Far::StencilTable,
Osd::CpuPatchTable,
Osd::OmpEvaluator>
(vertexStencils, varyingStencils,
nCoarseVertices, nverts, g_nParticles, g_patchTable);
#endif
#ifdef OPENSUBDIV_HAS_TBB
} else if (g_kernel == kTBB) {
g_evalOutput = new EvalOutput<Osd::CpuGLVertexBuffer,
Osd::CpuGLVertexBuffer,
Far::StencilTable,
Osd::CpuPatchTable,
Osd::TbbEvaluator>
(vertexStencils, varyingStencils,
nCoarseVertices, nverts, g_nParticles, g_patchTable);
#endif
#ifdef OPENSUBDIV_HAS_CUDA
} else if (g_kernel == kCUDA) {
g_evalOutput = new EvalOutput<Osd::CudaGLVertexBuffer,
Osd::CudaGLVertexBuffer,
Osd::CudaStencilTable,
Osd::CudaPatchTable,
Osd::CudaEvaluator>
(vertexStencils, varyingStencils,
nCoarseVertices, nverts, g_nParticles, g_patchTable);
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
} else if (g_kernel == kCL) {
static Osd::EvaluatorCacheT<Osd::CLEvaluator> clEvaluatorCache;
g_evalOutput = new EvalOutput<Osd::CLGLVertexBuffer,
Osd::CLGLVertexBuffer,
Osd::CLStencilTable,
Osd::CLPatchTable,
Osd::CLEvaluator,
CLDeviceContext>
(vertexStencils, varyingStencils,
nCoarseVertices, nverts, g_nParticles, g_patchTable,
&clEvaluatorCache, &g_clDeviceContext);
#endif
#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
} else if (g_kernel == kGLXFB) {
static Osd::EvaluatorCacheT<Osd::GLXFBEvaluator> glXFBEvaluatorCache;
g_evalOutput = new EvalOutput<Osd::GLVertexBuffer,
Osd::GLVertexBuffer,
Osd::GLStencilTableTBO,
Osd::GLPatchTable,
Osd::GLXFBEvaluator>
(vertexStencils, varyingStencils,
nCoarseVertices, nverts, g_nParticles, g_patchTable,
&glXFBEvaluatorCache);
#endif
#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
} else if (g_kernel == kGLCompute) {
static Osd::EvaluatorCacheT<Osd::GLComputeEvaluator> glComputeEvaluatorCache;
g_evalOutput = new EvalOutput<Osd::GLVertexBuffer,
Osd::GLVertexBuffer,
Osd::GLStencilTableSSBO,
Osd::GLPatchTable,
Osd::GLComputeEvaluator>
(vertexStencils, varyingStencils,
nCoarseVertices, nverts, g_nParticles, g_patchTable,
&glComputeEvaluatorCache);
#endif
}
// Create the 'uv particles' manager - this class manages the limit
// location samples (ptex face index, (s,t) and updates them between frames.
// Note: the number of limit locations can be entirely arbitrary
delete g_particles;
g_particles = new STParticles(*topologyRefiner, g_patchTable,
g_nParticles, !g_randomStart);
g_nParticles = g_particles->GetNumParticles();
g_particles->SetSpeed(speed);
g_prevTime = -1;
g_currentTime = 0;
updateGeom();
delete topologyRefiner;
}
//------------------------------------------------------------------------------
int main(int, char **) {
int maxlevel = 5;
Far::TopologyRefiner * refiner = createFarTopologyRefiner();
// Uniformly refine the topolgy up to 'maxlevel'
refiner->RefineUniform( maxlevel );
// Allocate a buffer for vertex primvar data. The buffer length is set to
// be the sum of all children vertices up to the highest level of refinement.
std::vector<Vertex> vbuffer(refiner->GetNumVerticesTotal());
Vertex * verts = &vbuffer[0];
// Initialize coarse mesh primvar data
int nCoarseVerts = g_nverts;
for (int i=0; i<nCoarseVerts; ++i) {
verts[i].SetPosition(g_verts[i][0], g_verts[i][1], g_verts[i][2]);
verts[i].SetColor(g_colors[i][0], g_colors[i][1], g_colors[i][2]);
}
// Interpolate all primvar data - not that this will perform both 'vertex' and
// 'varying' interpolation at once by calling each specialized method in our
// Vertex class with the appropriate weights.
refiner->Interpolate(verts, verts + nCoarseVerts);
{ // Visualization with Maya : print a MEL script that generates colored
// particles at the location of the refined vertices (don't forget to
// turn shading on in the viewport to see the colors)
int nverts = refiner->GetNumVertices(maxlevel);
// Position the 'verts' pointer to the first vertex of our 'maxlevel' level
for (int level=0; level<maxlevel; ++level) {
verts += refiner->GetNumVertices(level);
}
// Output particle positions
printf("particle ");
for (int vert=0; vert<nverts; ++vert) {
float const * pos = verts[vert].GetPosition();
printf("-p %f %f %f\n", pos[0], pos[1], pos[2]);
}
printf(";\n");
// Set particle point size (20 -- very large)
printf("addAttr -is true -ln \"pointSize\" -at long -dv 20 particleShape1;\n");
// Add per-particle color attribute ('rgbPP')
printf("addAttr -ln \"rgbPP\" -dt vectorArray particleShape1;\n");
// Set per-particle color values from our 'varying' primvar data
printf("setAttr \"particleShape1.rgbPP\" -type \"vectorArray\" %d ", nverts);
for (int vert=0; vert<nverts; ++vert) {
float const * color = verts[vert].GetColor();
printf("%f %f %f\n", color[0], color[1], color[2]);
}
printf(";\n");
}
}