mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-12-01 15:50:07 +00:00
b27b55e4a8
- split Far::PatchDescriptor into its own class (mirrors Far::PatchParam) - hide PatchArray as a private internal structure - add public accessors patterned after Far::TopologyRefiner (returning Vtr::Arrays) - propagate new API to all dependent code note: some direct table accessors have not been removed *yet* - see code for details
126 lines
4.3 KiB
C++
126 lines
4.3 KiB
C++
//
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// Copyright 2013 Pixar
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//
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// Licensed under the Apache License, Version 2.0 (the "Apache License")
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// with the following modification; you may not use this file except in
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// compliance with the Apache License and the following modification to it:
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// Section 6. Trademarks. is deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the trade
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// names, trademarks, service marks, or product names of the Licensor
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// and its affiliates, except as required to comply with Section 4(c) of
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// the License and to reproduce the content of the NOTICE file.
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//
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// You may obtain a copy of the Apache License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the Apache License with the above modification is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the Apache License for the specific
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// language governing permissions and limitations under the Apache License.
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//
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#include "../osd/drawContext.h"
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#include <cstring>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Osd {
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DrawContext::~DrawContext() {}
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void
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DrawContext::ConvertPatchArrays(Far::PatchTables const &patchTables,
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PatchArrayVector &osdPatchArrays, int maxValence, int numElements) {
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// create patch arrays for drawing (while duplicating subpatches for transition patch arrays)
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static int subPatchCounts[] = { 1, 3, 4, 4, 4, 2 }; // number of subpatches for patterns
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int numTotalPatchArrays = 0;
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for (int array=0; array < patchTables.GetNumPatchArrays(); ++array) {
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Far::PatchDescriptor::TransitionPattern pattern =
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patchTables.GetPatchArrayDescriptor(array).GetPattern();
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numTotalPatchArrays += subPatchCounts[(int)pattern];
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}
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// allocate drawing patch arrays
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osdPatchArrays.clear();
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osdPatchArrays.reserve(numTotalPatchArrays);
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int narrays = patchTables.GetNumPatchArrays();
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for (int array=0, pidx=0, vidx=0, qidx=0; array<narrays; ++array) {
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Far::PatchDescriptor srcDesc = patchTables.GetPatchArrayDescriptor(array);
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int npatches = patchTables.GetNumPatches(array),
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nsubpatches = subPatchCounts[(int)srcDesc.GetPattern()],
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nverts = srcDesc.GetNumControlVertices();
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for (int i = 0; i < nsubpatches; ++i) {
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PatchDescriptor desc(srcDesc, maxValence, i, numElements);
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osdPatchArrays.push_back(PatchArray(desc, npatches, vidx, pidx, qidx));
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}
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vidx += npatches * nverts;
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pidx += npatches;
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qidx += (srcDesc.GetType() == Far::PatchDescriptor::GREGORY) ? npatches*nverts : 0;
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}
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}
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// note : it is likely that Far::PatchTables::GetPatchControlVerticesTable()
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// will eventually be deprecated if control vertices cannot be kept
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// in a single linear array of indices. This function will help
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// packing patch control vertices for GPU buffers.
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void
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DrawContext::packPatchVerts(Far::PatchTables const & patchTables,
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std::vector<Index> & dst) {
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dst.resize(patchTables.GetNumControlVerticesTotal());
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Index * ptr = &dst[0];
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int narrays = patchTables.GetNumPatchArrays();
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for (int array=0; array<narrays; ++array) {
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Far::IndexArray verts = patchTables.GetPatchArrayVertices(array);
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memcpy(ptr, verts.begin(), verts.size()*sizeof(Index));
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ptr += verts.size();
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}
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}
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void
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DrawContext::packFVarData(Far::PatchTables const & patchTables,
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int fvarWidth, FVarData const & src, FVarData & dst) {
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assert(fvarWidth and (not src.empty()));
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Far::PatchTables::FVarPatchTables const * fvarPatchTables =
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patchTables.GetFVarPatchTables();
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assert(fvarPatchTables);
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// OsdMesh only accesses channel 0
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std::vector<Far::Index> const & indices = fvarPatchTables->GetPatchVertices(0);
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dst.resize(indices.size() * fvarWidth);
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float * ptr = &dst[0];
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for (int fvert=0; fvert<(int)indices.size(); ++fvert, ptr+=fvarWidth) {
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int index = indices[fvert] * fvarWidth;
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assert(index<(int)src.size());
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memcpy(ptr, &src[index], fvarWidth*sizeof(float));
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}
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}
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} // end namespace Osd
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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