stencilTableFactory.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_STENCILTABLE_FACTORY_H
#define OPENSUBDIV3_FAR_STENCILTABLE_FACTORY_H
 
#include "../version.h"
 
#include "../far/patchTable.h"
 
#include <vector>
 
namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {
 
namespace Far {
 
class TopologyRefiner;
 
template <typename REAL> class StencilReal;
template <typename REAL> class StencilTableReal;
 
template <typename REAL> class LimitStencilReal;
template <typename REAL> class LimitStencilTableReal;
 
 
template <typename REAL>
class StencilTableFactoryReal {
 
public:
 
    enum Mode {
        INTERPOLATE_VERTEX=0,           
        INTERPOLATE_VARYING,            
        INTERPOLATE_FACE_VARYING        
    };
 
    struct Options {
 
        Options() : interpolationMode(INTERPOLATE_VERTEX),
                    generateOffsets(false),
                    generateControlVerts(false),
                    generateIntermediateLevels(true),
                    factorizeIntermediateLevels(true),
                    maxLevel(10),
                    fvarChannel(0) { }
 
        unsigned int interpolationMode           : 2, 
                     generateOffsets             : 1, 
                     generateControlVerts        : 1, 
                     generateIntermediateLevels  : 1, 
                     factorizeIntermediateLevels : 1, 
                     maxLevel                    : 4; 
        unsigned int fvarChannel;                     
    };
 
    static StencilTableReal<REAL> const * Create(
                TopologyRefiner const & refiner, Options options = Options());
 
 
    static StencilTableReal<REAL> const * Create(
                int numTables, StencilTableReal<REAL> const ** tables);
 
 
    static StencilTableReal<REAL> const * AppendLocalPointStencilTable(
                TopologyRefiner const &refiner,
                StencilTableReal<REAL> const *baseStencilTable,
                StencilTableReal<REAL> const *localPointStencilTable,
                bool factorize = true);
 
    static StencilTableReal<REAL> const * AppendLocalPointStencilTableVarying(
                TopologyRefiner const &refiner,
                StencilTableReal<REAL> const *baseStencilTable,
                StencilTableReal<REAL> const *localPointStencilTable,
                bool factorize = true) {
        return AppendLocalPointStencilTable(
                refiner, baseStencilTable, localPointStencilTable, factorize);
    }
 
    static StencilTableReal<REAL> const * AppendLocalPointStencilTableFaceVarying(
                TopologyRefiner const &refiner,
                StencilTableReal<REAL> const *baseStencilTable,
                StencilTableReal<REAL> const *localPointStencilTable,
                int channel = 0,
                bool factorize = true);
 
private:
 
    // Generate stencils for the coarse control-vertices (single weight = 1.0f)
    static void generateControlVertStencils(
                int numControlVerts,
                StencilReal<REAL> & dst);
 
    // Internal method to splice local point stencils
    static StencilTableReal<REAL> const * appendLocalPointStencilTable(
                TopologyRefiner const &refiner,
                StencilTableReal<REAL> const * baseStencilTable,
                StencilTableReal<REAL> const * localPointStencilTable,
                int channel,
                bool factorize);
};
 
template <typename REAL>
class LimitStencilTableFactoryReal {
 
public:
 
    enum Mode {
        INTERPOLATE_VERTEX=0,           
        INTERPOLATE_VARYING,            
        INTERPOLATE_FACE_VARYING        
    };
 
    struct Options {
 
        Options() : interpolationMode(INTERPOLATE_VERTEX),
                    generate1stDerivatives(true),
                    generate2ndDerivatives(false),
                    fvarChannel(0) { }
 
        unsigned int interpolationMode           : 2, 
                     generate1stDerivatives      : 1, 
                     generate2ndDerivatives      : 1; 
        unsigned int fvarChannel;                     
    };
 
    struct LocationArray {
 
        LocationArray() : ptexIdx(-1), numLocations(0), s(0), t(0) { }
 
        int ptexIdx,        
            numLocations;   
 
        REAL  const * s,    
                    * t;    
    };
 
    typedef std::vector<LocationArray> LocationArrayVec;
 
    static LimitStencilTableReal<REAL> const * Create(
                TopologyRefiner const & refiner,
                LocationArrayVec const & locationArrays,
                StencilTableReal<REAL> const * cvStencils = 0,
                PatchTable const * patchTable = 0,
                Options options = Options());
 
};
 
 
//
//  Public wrapper classes for the templates
//
class Stencil;
class StencilTable;
 
class StencilTableFactory : public StencilTableFactoryReal<float> {
private:
    typedef StencilTableFactoryReal<float> BaseFactory;
    typedef StencilTableReal<float>        BaseTable;
 
public:
    static StencilTable const * Create(
                TopologyRefiner const & refiner, Options options = Options()) {
 
        return reinterpret_cast<StencilTable const *>(
                BaseFactory::Create(refiner, options));
    }
 
    static StencilTable const * Create(
                int numTables, StencilTable const ** tables) {
 
        return reinterpret_cast<StencilTable const *>(
                BaseFactory::Create(numTables,
                        reinterpret_cast<BaseTable const **>(tables)));
    }
 
    static StencilTable const * AppendLocalPointStencilTable(
                TopologyRefiner const &refiner,
                StencilTable const *baseStencilTable,
                StencilTable const *localPointStencilTable,
                bool factorize = true) {
 
        return reinterpret_cast<StencilTable const *>(
                BaseFactory::AppendLocalPointStencilTable(refiner,
                        static_cast<BaseTable const *>(baseStencilTable),
                        static_cast<BaseTable const *>(localPointStencilTable),
                        factorize));
    }
 
    static StencilTable const * AppendLocalPointStencilTableVarying(
                TopologyRefiner const &refiner,
                StencilTable const *baseStencilTable,
                StencilTable const *localPointStencilTable,
                bool factorize = true) {
 
        return reinterpret_cast<StencilTable const *>(
                BaseFactory::AppendLocalPointStencilTableVarying(refiner,
                        static_cast<BaseTable const *>(baseStencilTable),
                        static_cast<BaseTable const *>(localPointStencilTable),
                        factorize));
    }
 
    static StencilTable const * AppendLocalPointStencilTableFaceVarying(
                TopologyRefiner const &refiner,
                StencilTable const *baseStencilTable,
                StencilTable const *localPointStencilTable,
                int channel = 0,
                bool factorize = true) {
 
        return reinterpret_cast<StencilTable const *>(
                BaseFactory::AppendLocalPointStencilTableFaceVarying(refiner,
                        static_cast<BaseTable const *>(baseStencilTable),
                        static_cast<BaseTable const *>(localPointStencilTable),
                        channel, factorize));
    }
};
 
class LimitStencil;
class LimitStencilTable;
 
class LimitStencilTableFactory : public LimitStencilTableFactoryReal<float> {
private:
    typedef LimitStencilTableFactoryReal<float> BaseFactory;
    typedef StencilTableReal<float>             BaseTable;
 
public:
    static LimitStencilTable const * Create(
                TopologyRefiner const & refiner,
                LocationArrayVec const & locationArrays,
                StencilTable const * cvStencils = 0,
                PatchTable const * patchTable = 0,
                Options options = Options()) {
 
        return reinterpret_cast<LimitStencilTable const *>(
                BaseFactory::Create(
                        refiner,
                        locationArrays,
                        static_cast<BaseTable const *>(cvStencils),
                        patchTable,
                        options));
    }
};
 
} // end namespace Far
 
} // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;
 
} // end namespace OpenSubdiv
 
#endif // OPENSUBDIV3_FAR_STENCILTABLE_FACTORY_H