mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-12-14 04:50:05 +00:00
c59c801e9c
- added necessary options to struct LimitStencilTableFactory...::Options
- updated Create() to support creation of varying and face-varying stencils
- updated Create() to provide clarity and stricter compatibility checks for
the optional StencilTable and PatchTable arguments
- modified Doxygen comments for Create() to clarify requirements of the
optional table arguments
- added missing StencilTableFactory::AppendLocalPointStencilTableVarying()
385 lines
16 KiB
C++
385 lines
16 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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#ifndef OPENSUBDIV3_FAR_STENCILTABLE_FACTORY_H
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#define OPENSUBDIV3_FAR_STENCILTABLE_FACTORY_H
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#include "../version.h"
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#include "../far/patchTable.h"
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#include <vector>
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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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template <typename REAL> class StencilReal;
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template <typename REAL> class StencilTableReal;
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template <typename REAL> class LimitStencilReal;
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template <typename REAL> class LimitStencilTableReal;
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/// \brief A specialized factory for StencilTable
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///
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template <typename REAL>
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class StencilTableFactoryReal {
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public:
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enum Mode {
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INTERPOLATE_VERTEX=0, ///< vertex primvar stencils
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INTERPOLATE_VARYING, ///< varying primvar stencils
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INTERPOLATE_FACE_VARYING ///< face-varying primvar stencils
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};
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struct Options {
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Options() : interpolationMode(INTERPOLATE_VERTEX),
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generateOffsets(false),
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generateControlVerts(false),
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generateIntermediateLevels(true),
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factorizeIntermediateLevels(true),
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maxLevel(10),
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fvarChannel(0) { }
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unsigned int interpolationMode : 2, ///< interpolation mode
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generateOffsets : 1, ///< populate optional "_offsets" field
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generateControlVerts : 1, ///< generate stencils for control-vertices
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generateIntermediateLevels : 1, ///< vertices at all levels or highest only
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factorizeIntermediateLevels : 1, ///< accumulate stencil weights from control
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/// vertices or from the stencils of the
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/// previous level
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maxLevel : 4; ///< generate stencils up to 'maxLevel'
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unsigned int fvarChannel; ///< face-varying channel to use
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/// when generating face-varying stencils
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};
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/// \brief Instantiates StencilTable from TopologyRefiner that have been
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/// refined uniformly or adaptively.
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///
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/// \note The factory only creates stencils for vertices that have already
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/// been refined in the TopologyRefiner. Use RefineUniform() or
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/// RefineAdaptive() before constructing the stencils.
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///
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/// @param refiner The TopologyRefiner containing the topology
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///
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/// @param options Options controlling the creation of the table
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///
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static StencilTableReal<REAL> const * Create(
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TopologyRefiner const & refiner, Options options = Options());
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/// \brief Instantiates StencilTable by concatenating an array of existing
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/// stencil tables.
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///
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/// \note This factory checks that the stencil tables point to the same set
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/// of supporting control vertices - no re-indexing is done.
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/// GetNumControlVertices() *must* return the same value for all input
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/// tables.
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///
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/// @param numTables Number of input StencilTables
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///
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/// @param tables Array of input StencilTables
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///
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static StencilTableReal<REAL> const * Create(
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int numTables, StencilTableReal<REAL> const ** tables);
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/// \brief Utility function for stencil splicing for local point stencils.
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///
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/// @param refiner The TopologyRefiner containing the topology
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///
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/// @param baseStencilTable Input StencilTable for refined vertices
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///
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/// @param localPointStencilTable
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/// StencilTable for the change of basis patch points.
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///
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/// @param factorize If factorize set to true, endcap stencils will be
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/// factorized with supporting vertices from baseStencil
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/// table so that the endcap points can be computed
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/// directly from control vertices.
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///
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static StencilTableReal<REAL> const * AppendLocalPointStencilTable(
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TopologyRefiner const &refiner,
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StencilTableReal<REAL> const *baseStencilTable,
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StencilTableReal<REAL> const *localPointStencilTable,
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bool factorize = true);
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/// \brief Utility function for stencil splicing for local point varying stencils.
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///
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/// @param refiner The TopologyRefiner containing the topology
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///
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/// @param baseStencilTable Input StencilTable for refined vertices
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///
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/// @param localPointStencilTable
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/// StencilTable for the change of basis patch points.
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///
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/// @param factorize If factorize set to true, endcap stencils will be
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/// factorized with supporting vertices from baseStencil
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/// table so that the endcap points can be computed
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/// directly from control vertices.
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///
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static StencilTableReal<REAL> const * AppendLocalPointStencilTableVarying(
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TopologyRefiner const &refiner,
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StencilTableReal<REAL> const *baseStencilTable,
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StencilTableReal<REAL> const *localPointStencilTable,
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bool factorize = true) {
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return AppendLocalPointStencilTable(
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refiner, baseStencilTable, localPointStencilTable, factorize);
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}
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/// \brief Utility function for stencil splicing for local point
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/// face-varying stencils.
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///
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/// @param refiner The TopologyRefiner containing the topology
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///
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/// @param baseStencilTable Input StencilTable for refined vertices
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///
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/// @param localPointStencilTable
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/// StencilTable for the change of basis patch points.
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///
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/// @param channel face-varying channel
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///
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/// @param factorize If factorize sets to true, endcap stencils will be
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/// factorized with supporting vertices from baseStencil
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/// table so that the endcap points can be computed
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/// directly from control vertices.
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///
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static StencilTableReal<REAL> const * AppendLocalPointStencilTableFaceVarying(
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TopologyRefiner const &refiner,
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StencilTableReal<REAL> const *baseStencilTable,
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StencilTableReal<REAL> const *localPointStencilTable,
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int channel = 0,
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bool factorize = true);
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private:
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// Generate stencils for the coarse control-vertices (single weight = 1.0f)
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static void generateControlVertStencils(
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int numControlVerts,
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StencilReal<REAL> & dst);
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// Internal method to splice local point stencils
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static StencilTableReal<REAL> const * appendLocalPointStencilTable(
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TopologyRefiner const &refiner,
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StencilTableReal<REAL> const * baseStencilTable,
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StencilTableReal<REAL> const * localPointStencilTable,
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int channel,
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bool factorize);
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};
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/// \brief A specialized factory for LimitStencilTable
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///
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/// The LimitStencilTableFactory creates a table of limit stencils. Limit
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/// stencils can interpolate any arbitrary location on the limit surface.
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/// The stencils will be bilinear if the surface is refined uniformly, and
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/// bicubic if feature adaptive isolation is used instead.
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///
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/// Surface locations are expressed as a combination of ptex face index and
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/// normalized (s,t) patch coordinates. The factory exposes the LocationArray
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/// struct as a container for these location descriptors.
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///
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template <typename REAL>
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class LimitStencilTableFactoryReal {
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public:
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enum Mode {
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INTERPOLATE_VERTEX=0, ///< vertex primvar stencils
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INTERPOLATE_VARYING, ///< varying primvar stencils
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INTERPOLATE_FACE_VARYING ///< face-varying primvar stencils
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};
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struct Options {
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Options() : interpolationMode(INTERPOLATE_VERTEX),
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generate1stDerivatives(true),
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generate2ndDerivatives(false),
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fvarChannel(0) { }
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unsigned int interpolationMode : 2, ///< interpolation mode
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generate1stDerivatives : 1, ///< Generate weights for 1st derivatives
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generate2ndDerivatives : 1; ///< Generate weights for 2nd derivatives
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unsigned int fvarChannel; ///< face-varying channel to use
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};
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/// \brief Descriptor for limit surface locations
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struct LocationArray {
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LocationArray() : ptexIdx(-1), numLocations(0), s(0), t(0) { }
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int ptexIdx, ///< ptex face index
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numLocations; ///< number of (u,v) coordinates in the array
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REAL const * s, ///< array of u coordinates
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* t; ///< array of v coordinates
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};
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typedef std::vector<LocationArray> LocationArrayVec;
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/// \brief Instantiates LimitStencilTable from a TopologyRefiner that has
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/// been refined either uniformly or adaptively.
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///
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/// @param refiner The TopologyRefiner containing the topology
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///
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/// @param locationArrays An array of surface location descriptors
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/// (see LocationArray)
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///
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/// @param cvStencils A StencilTable generated from the TopologyRefiner
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/// (Optional: prevents redundant instantiation of the
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/// table if available. The given table must at least
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/// contain stencils for all control points and all
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/// refined points -- any stencils for local points of
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/// a PatchTable must match the PatchTable provided or
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/// internally generated)
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///
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/// @param patchTable A PatchTable generated from the TopologyRefiner
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/// (Optional: prevents redundant instantiation of the
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/// table if available. The given table must match
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/// the optional StencilTable if also provided)
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///
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/// @param options Options controlling the creation of the table
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///
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static LimitStencilTableReal<REAL> const * Create(
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TopologyRefiner const & refiner,
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LocationArrayVec const & locationArrays,
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StencilTableReal<REAL> const * cvStencils = 0,
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PatchTable const * patchTable = 0,
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Options options = Options());
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};
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//
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// Public wrapper classes for the templates
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//
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class Stencil;
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class StencilTable;
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/// \brief Stencil table factory class wrapping the template for compatibility.
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///
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class StencilTableFactory : public StencilTableFactoryReal<float> {
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private:
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typedef StencilTableFactoryReal<float> BaseFactory;
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typedef StencilTableReal<float> BaseTable;
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public:
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static StencilTable const * Create(
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TopologyRefiner const & refiner, Options options = Options()) {
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return static_cast<StencilTable const *>(
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BaseFactory::Create(refiner, options));
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}
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static StencilTable const * Create(
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int numTables, StencilTable const ** tables) {
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return static_cast<StencilTable const *>(
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BaseFactory::Create(numTables,
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reinterpret_cast<BaseTable const **>(tables)));
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}
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static StencilTable const * AppendLocalPointStencilTable(
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TopologyRefiner const &refiner,
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StencilTable const *baseStencilTable,
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StencilTable const *localPointStencilTable,
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bool factorize = true) {
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return static_cast<StencilTable const *>(
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BaseFactory::AppendLocalPointStencilTable(refiner,
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static_cast<BaseTable const *>(baseStencilTable),
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static_cast<BaseTable const *>(localPointStencilTable),
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factorize));
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}
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static StencilTable const * AppendLocalPointStencilTableVarying(
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TopologyRefiner const &refiner,
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StencilTable const *baseStencilTable,
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StencilTable const *localPointStencilTable,
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bool factorize = true) {
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return static_cast<StencilTable const *>(
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BaseFactory::AppendLocalPointStencilTableVarying(refiner,
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static_cast<BaseTable const *>(baseStencilTable),
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static_cast<BaseTable const *>(localPointStencilTable),
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factorize));
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}
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static StencilTable const * AppendLocalPointStencilTableFaceVarying(
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TopologyRefiner const &refiner,
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StencilTable const *baseStencilTable,
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StencilTable const *localPointStencilTable,
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int channel = 0,
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bool factorize = true) {
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return static_cast<StencilTable const *>(
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BaseFactory::AppendLocalPointStencilTableFaceVarying(refiner,
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static_cast<BaseTable const *>(baseStencilTable),
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static_cast<BaseTable const *>(localPointStencilTable),
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channel, factorize));
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}
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};
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class LimitStencil;
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class LimitStencilTable;
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/// \brief Stencil table factory class wrapping the template for compatibility.
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///
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class LimitStencilTableFactory : public LimitStencilTableFactoryReal<float> {
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private:
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typedef LimitStencilTableFactoryReal<float> BaseFactory;
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typedef StencilTableReal<float> BaseTable;
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public:
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static LimitStencilTable const * Create(
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TopologyRefiner const & refiner,
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LocationArrayVec const & locationArrays,
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StencilTable const * cvStencils = 0,
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PatchTable const * patchTable = 0,
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Options options = Options()) {
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return static_cast<LimitStencilTable const *>(
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BaseFactory::Create(
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refiner,
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locationArrays,
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static_cast<BaseTable const *>(cvStencils),
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patchTable,
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options));
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}
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};
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} // end namespace Far
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} // end namespace OPENSUBDIV_VERSION
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using namespace OPENSUBDIV_VERSION;
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} // end namespace OpenSubdiv
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#endif // OPENSUBDIV3_FAR_STENCILTABLE_FACTORY_H
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