131 lines
4.5 KiB
C++
131 lines
4.5 KiB
C++
//
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// Copyright 2015 Pixar
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//
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// Licensed under the terms set forth in the LICENSE.txt file available at
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// https://opensubdiv.org/license.
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//
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#ifndef OPENSUBDIV_EXAMPLES_GL_SHARE_TOPOLOGY_MESH_REFINER_H
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#define OPENSUBDIV_EXAMPLES_GL_SHARE_TOPOLOGY_MESH_REFINER_H
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#include <opensubdiv/osd/mesh.h> // for evaluator cache
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template <class EVALUATOR,
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class VERTEX_BUFFER,
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class STENCIL_TABLE,
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class DEVICE_CONTEXT=void>
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class MeshRefiner {
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public:
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typedef EVALUATOR Evaluator;
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typedef STENCIL_TABLE StencilTable;
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typedef DEVICE_CONTEXT DeviceContext;
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typedef OpenSubdiv::Osd::EvaluatorCacheT<Evaluator> EvaluatorCache;
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MeshRefiner(OpenSubdiv::Far::StencilTable const * vertexStencils, //XXX: takes ownership
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OpenSubdiv::Far::StencilTable const * varyingStencils,
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int numControlVertices,
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EvaluatorCache * evaluatorCache = NULL,
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DeviceContext * deviceContext = NULL)
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: _evaluatorCache(evaluatorCache),
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_deviceContext(deviceContext) {
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_numControlVertices = numControlVertices;
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_numVertices = numControlVertices + vertexStencils->GetNumStencils();
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_vertexStencils = OpenSubdiv::Osd::convertToCompatibleStencilTable<StencilTable>(
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vertexStencils, deviceContext);
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_varyingStencils = OpenSubdiv::Osd::convertToCompatibleStencilTable<StencilTable>(
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varyingStencils, deviceContext);
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}
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~MeshRefiner() {
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delete _vertexStencils;
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delete _varyingStencils;
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}
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template <typename VBO>
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void Refine(VBO *vbo, int vertsOffset) {
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OpenSubdiv::Osd::BufferDescriptor const &globalVertexDesc =
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vbo->GetVertexDesc();
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OpenSubdiv::Osd::BufferDescriptor const &globalVaryingDesc =
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vbo->GetVaryingDesc();
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OpenSubdiv::Osd::BufferDescriptor vertexSrcDesc(
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globalVertexDesc.offset + vertsOffset * globalVertexDesc.stride,
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globalVertexDesc.length,
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globalVertexDesc.stride);
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OpenSubdiv::Osd::BufferDescriptor vertexDstDesc(
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vertexSrcDesc.offset + (_numControlVertices * vertexSrcDesc.stride),
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vertexSrcDesc.length,
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vertexSrcDesc.stride);
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// vertex
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Evaluator const *evalInstance = OpenSubdiv::Osd::GetEvaluator<Evaluator>(
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_evaluatorCache, vertexSrcDesc, vertexDstDesc, _deviceContext);
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Evaluator::EvalStencils(
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vbo->GetVertexBuffer(), vertexSrcDesc,
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vbo->GetVertexBuffer(), vertexDstDesc,
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_vertexStencils,
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evalInstance,
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_deviceContext);
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// varying
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if (_varyingStencils) {
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OpenSubdiv::Osd::BufferDescriptor varyingSrcDesc(
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globalVaryingDesc.offset + vertsOffset * globalVaryingDesc.stride,
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globalVaryingDesc.length,
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globalVaryingDesc.stride);
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OpenSubdiv::Osd::BufferDescriptor varyingDstDesc(
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varyingSrcDesc.offset + (_numControlVertices * varyingSrcDesc.stride),
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varyingSrcDesc.length,
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varyingSrcDesc.stride);
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evalInstance = OpenSubdiv::Osd::GetEvaluator<Evaluator>(
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_evaluatorCache, varyingSrcDesc, varyingDstDesc, _deviceContext);
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if (vbo->GetVaryingBuffer()) {
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// non interleaved
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Evaluator::EvalStencils(
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vbo->GetVaryingBuffer(), varyingSrcDesc,
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vbo->GetVaryingBuffer(), varyingDstDesc,
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_varyingStencils,
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evalInstance,
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_deviceContext);
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} else {
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// interleaved
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Evaluator::EvalStencils(
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vbo->GetVertexBuffer(), varyingSrcDesc,
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vbo->GetVertexBuffer(), varyingDstDesc,
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_varyingStencils,
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evalInstance,
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_deviceContext);
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}
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}
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}
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void Synchronize() {
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Evaluator::Synchronize(_deviceContext);
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}
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int GetNumVertices() const { // total (control + refined)
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return _numVertices;
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}
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int GetNumControlVertices() const {
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return _numControlVertices;
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}
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private:
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int _numVertices;
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int _numControlVertices;
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StencilTable const *_vertexStencils;
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StencilTable const *_varyingStencils;
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EvaluatorCache * _evaluatorCache;
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DeviceContext *_deviceContext;
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};
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#endif // OPENSUBDIV_EXAMPLES_GL_SHARE_TOPOLOGY_TOPOLOGY_H
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