patchTableFactory.h

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//
//   Copyright 2013 Pixar
//
//   Licensed under the terms set forth in the LICENSE.txt file available at
//   https://opensubdiv.org/license.
//
 
#ifndef OPENSUBDIV3_FAR_PATCH_TABLE_FACTORY_H
#define OPENSUBDIV3_FAR_PATCH_TABLE_FACTORY_H
 
#include "../version.h"
 
#include "../far/topologyRefiner.h"
#include "../far/patchTable.h"
 
namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {
 
namespace Far {
 
class PatchTableFactory {
public:
 
    struct Options {
 
        enum EndCapType {
            ENDCAP_NONE = 0,        
            ENDCAP_BILINEAR_BASIS,  
            ENDCAP_BSPLINE_BASIS,   
            ENDCAP_GREGORY_BASIS,   
            ENDCAP_LEGACY_GREGORY   
        };
 
        Options(unsigned int maxIsolation=10) :
             generateAllLevels(false),
             includeBaseLevelIndices(true),
             includeFVarBaseLevelIndices(false),
             triangulateQuads(false),
             useSingleCreasePatch(false),
             useInfSharpPatch(false),
             maxIsolationLevel(maxIsolation & 0xf),
             endCapType(ENDCAP_GREGORY_BASIS),
             shareEndCapPatchPoints(true),
             generateVaryingTables(true),
             generateVaryingLocalPoints(true),
             generateFVarTables(false),
             patchPrecisionDouble(false),
             fvarPatchPrecisionDouble(false),
             generateFVarLegacyLinearPatches(true),
             generateLegacySharpCornerPatches(true),
             numFVarChannels(-1),
             fvarChannelIndices(0)
        { }
 
        EndCapType GetEndCapType() const { return (EndCapType)endCapType; }
 
        void SetEndCapType(EndCapType e) { endCapType = e & 0x7; }
 
        void SetMaxIsolationLevel(unsigned int level) { maxIsolationLevel = level & 0xf; }
 
        template <typename REAL> void SetPatchPrecision();
 
        template <typename REAL> void SetFVarPatchPrecision();
 
        TopologyRefiner::AdaptiveOptions GetRefineAdaptiveOptions() const {
            TopologyRefiner::AdaptiveOptions adaptiveOptions(maxIsolationLevel);
 
            adaptiveOptions.useInfSharpPatch     = useInfSharpPatch;
            adaptiveOptions.useSingleCreasePatch = useSingleCreasePatch;
            adaptiveOptions.considerFVarChannels = generateFVarTables &&
                                                  !generateFVarLegacyLinearPatches;
            return adaptiveOptions;
        }
 
        unsigned int generateAllLevels           : 1, 
                     includeBaseLevelIndices     : 1, 
                     includeFVarBaseLevelIndices : 1, 
                     triangulateQuads            : 1, 
 
                     useSingleCreasePatch : 1, 
                     useInfSharpPatch     : 1, 
                     maxIsolationLevel    : 4, 
 
                     // end-capping
                     endCapType              : 3, 
                     shareEndCapPatchPoints  : 1, 
 
                     // varying
                     generateVaryingTables      : 1, 
                     generateVaryingLocalPoints : 1, 
 
                     // face-varying
                     generateFVarTables  : 1, 
 
                     // precision
                     patchPrecisionDouble     : 1, 
                     fvarPatchPrecisionDouble : 1, 
 
                     // legacy behaviors (default to true)
                     generateFVarLegacyLinearPatches  : 1, 
                     generateLegacySharpCornerPatches : 1; 
 
        int          numFVarChannels;          
        int const *  fvarChannelIndices;       
    };
 
    static PatchTable * Create(TopologyRefiner const & refiner,
                               Options options = Options(),
                               ConstIndexArray selectedFaces = ConstIndexArray());
 
public:
    //  PatchFaceTag
    //
    //  This simple struct was previously used within the factory to take inventory of
    //  various kinds of patches to fully allocate buffers prior to populating them.  It
    //  was not intended to be exposed as part of the public interface.
    //
    //  It is no longer used internally and is being kept here to respect preservation
    //  of the public interface, but it will be deprecated at the earliest opportunity.
    //
    //
    struct PatchFaceTag {
    public:
        unsigned int   _hasPatch        : 1;
        unsigned int   _isRegular       : 1;
        unsigned int   _transitionMask  : 4;
        unsigned int   _boundaryMask    : 4;
        unsigned int   _boundaryIndex   : 2;
        unsigned int   _boundaryCount   : 3;
        unsigned int   _hasBoundaryEdge : 3;
        unsigned int   _isSingleCrease  : 1;
 
        void clear();
        void assignBoundaryPropertiesFromEdgeMask(int boundaryEdgeMask);
        void assignBoundaryPropertiesFromVertexMask(int boundaryVertexMask);
        void assignTransitionPropertiesFromEdgeMask(int boundaryVertexMask);
    };
    typedef std::vector<PatchFaceTag> PatchTagVector;
};
 
 
template <> inline void PatchTableFactory::Options::SetPatchPrecision<float>() {
    patchPrecisionDouble = false;
}
template <> inline void PatchTableFactory::Options::SetFVarPatchPrecision<float>() {
    fvarPatchPrecisionDouble = false;
}
 
template <> inline void PatchTableFactory::Options::SetPatchPrecision<double>() {
    patchPrecisionDouble = true;
}
template <> inline void PatchTableFactory::Options::SetFVarPatchPrecision<double>() {
    fvarPatchPrecisionDouble = true;
}
 
 
} // end namespace Far
 
} // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;
 
} // end namespace OpenSubdiv
 
 
#endif /* OPENSUBDIV3_FAR_PATCH_TABLE_FACTORY_H */