refinerSurfaceFactory.h

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//
//   Copyright 2021 Pixar
//
//   Licensed under the terms set forth in the LICENSE.txt file available at
//   https://opensubdiv.org/license.
//
 
#ifndef OPENSUBDIV3_BFR_REFINER_SURFACE_FACTORY_H
#define OPENSUBDIV3_BFR_REFINER_SURFACE_FACTORY_H
 
#include "../version.h"
 
#include "../bfr/surfaceFactory.h"
#include "../bfr/surfaceFactoryCache.h"
 
namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {
 
namespace Far {
    class TopologyRefiner;
}
 
namespace Bfr {
 
class RefinerSurfaceFactoryBase : public SurfaceFactory {
public:
 
 
    RefinerSurfaceFactoryBase(Far::TopologyRefiner const & mesh,
                              Options const & options);
 
    ~RefinerSurfaceFactoryBase() override = default;
 
 
 
    Far::TopologyRefiner const & GetMesh() const { return _mesh; }
 
    int GetNumFaces() const { return _numFaces; }
 
    int GetNumFVarChannels() const { return _numFVarChannels; }
 
protected:
    //
    //  Virtual overrides to satisfy the SurfaceFactoryMeshAdapter interface:
    //
    bool isFaceHole( Index faceIndex) const override;
    int  getFaceSize(Index faceIndex) const override;
 
    int getFaceVertexIndices(Index faceIndex,
                        Index vertexIndices[]) const override;
    int getFaceFVarValueIndices(Index faceIndex,
                        FVarID fvarID, Index fvarValueIndices[]) const override;
 
    int populateFaceVertexDescriptor(Index faceIndex, int faceVertex,
                        VertexDescriptor * vertexDescriptor) const override;
 
    int getFaceVertexIncidentFaceVertexIndices(
                        Index faceIndex, int faceVertex,
                        Index vertexIndices[]) const override;
    int getFaceVertexIncidentFaceFVarValueIndices(
                        Index faceIndex, int faceVertex,
                        FVarID fvarID, Index fvarValueIndices[]) const override;
 
    //  Optional SurfaceFactoryMeshAdapter overrides for regular patches:
    bool getFaceNeighborhoodVertexIndicesIfRegular(
                        Index faceIndex,
                        Index vertexIndices[]) const override;
 
    bool getFaceNeighborhoodFVarValueIndicesIfRegular(
                        Index faceIndex,
                        FVarID fvarID, Index fvarValueIndices[]) const override;
 
private:
    //
    //  Internal supporting methods:
    //
    int getFaceVaryingChannel(FVarID fvarID) const;
 
    int getFaceVertexPointIndices(Index faceIndex, int faceVertex,
                                  Index indices[], int vtxOrFVarChannel) const;
 
    int getFacePatchPointIndices(Index faceIndex,
                                 Index indices[], int vtxOrFVarChannel) const;
 
private:
    //  Additional members for the subclass:
    Far::TopologyRefiner const & _mesh;
 
    int _numFaces;
    int _numFVarChannels;
};
 
 
//
template <class CACHE_TYPE = SurfaceFactoryCache>
class RefinerSurfaceFactory : public RefinerSurfaceFactoryBase {
public:
    RefinerSurfaceFactory(Far::TopologyRefiner const & mesh,
                          Options const & options = Options()) :
            RefinerSurfaceFactoryBase(mesh, options),
            _localCache() {
 
        SurfaceFactory::setInternalCache(&_localCache);
    }
    ~RefinerSurfaceFactory() override = default;
 
private:
    CACHE_TYPE _localCache;
};
 
} // end namespace Bfr
 
} // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;
 
} // end namespace OpenSubdiv
 
#endif /* OPENSUBDIV3_BFR_REFINER_SURFACE_FACTORY_H */