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https://github.com/PixarAnimationStudios/OpenSubdiv
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4e807a776d
To encapsulate endcap functions from public API, add methods to tell the number of patch points needed (GetNumLocalPoints()) and to compute those patch points as a result of change of basis from the refined vertices (ComputeLocalPointValues()). ComputeLocalPointValues takes contiguous source data of all levels including level0 control vertices.
108 lines
3.9 KiB
C++
108 lines
3.9 KiB
C++
//
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// Copyright 2015 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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#ifndef OPENSUBDIV3_FAR_END_CAP_BSPLINE_BASIS_PATCH_FACTORY_H
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#define OPENSUBDIV3_FAR_END_CAP_BSPLINE_BASIS_PATCH_FACTORY_H
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#include "../far/patchTableFactory.h"
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#include "../far/gregoryBasis.h"
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#include "../vtr/level.h"
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Far {
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class TopologyRefiner;
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/// \brief A BSpline endcap factory
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///
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/// note: This is an internal use class in PatchTableFactory, and
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/// will be replaced with SdcSchemeWorker for mask coefficients
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/// and Vtr::Level for topology traversal.
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///
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class EndCapBSplineBasisPatchFactory {
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public:
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// XXXX need to add support for face-varying channel stencils
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/// \brief This factory accumulates vertex for bspline basis end cap
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///
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/// @param refiner TopologyRefiner from which to generate patches
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///
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/// @param shareBoundaryVertices Use same boundary vertices for neighboring
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/// patches. It reduces the number of stencils
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/// to be used.
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///
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EndCapBSplineBasisPatchFactory(TopologyRefiner const & refiner);
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/// \brief Returns end patch point indices for \a faceIndex of \a level.
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/// Note that end patch points are not included in the vertices in
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/// the topologyRefiner, they're expected to come after the end.
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/// The returning indices are offsetted by refiner->GetNumVerticesTotal.
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///
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/// @param level vtr refinement level
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///
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/// @param faceIndex vtr faceIndex at the level
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///
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/// @param levelPatchTags Array of patchTags for all faces in the level
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///
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/// @param levelVertOffset relative offset of patch vertex indices
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///
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ConstIndexArray GetPatchPoints(
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Vtr::internal::Level const * level, Index faceIndex,
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PatchTableFactory::PatchFaceTag const * levelPatchTags,
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int levelVertOffset);
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/// \brief Create a StencilTable for end patch points, relative to the max
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/// subdivision level.
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///
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StencilTable* CreateVertexStencilTable() const {
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return GregoryBasis::CreateStencilTable(_vertexStencils);
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}
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/// \brief Create a StencilTable for end patch varying primvar.
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/// This table is used as a convenient way to get varying primvars
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/// populated on end patch points along with positions.
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///
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StencilTable* CreateVaryingStencilTable() const {
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return GregoryBasis::CreateStencilTable(_varyingStencils);
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}
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private:
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TopologyRefiner const *_refiner;
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GregoryBasis::PointsVector _vertexStencils;
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GregoryBasis::PointsVector _varyingStencils;
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int _numVertices;
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int _numPatches;
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std::vector<Index> _patchPoints;
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};
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} // end namespace Far
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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#endif // OPENSUBDIV3_FAR_END_CAP_BSPLINE_BASIS_PATCH_FACTORY_H
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