OpenSubdiv/opensubdiv/osd/cpuKernel.h

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#ifndef OSD_CPU_KERNEL_H
#define OSD_CPU_KERNEL_H

#include "../version.h"

namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {

struct VertexDescriptor {

    VertexDescriptor(int numVertexElem, int numVaryingElem) 
        : numVertexElements(numVertexElem), numVaryingElements(numVaryingElem) { }

    void Clear(float *vertex, float *varying, int index) const {
        if (vertex) {
            for (int i = 0; i < numVertexElements; ++i)
                vertex[index*numVertexElements+i] = 0.0f;
        }

        if (varying) {
            for (int i = 0; i < numVaryingElements; ++i)
                varying[index*numVaryingElements+i] = 0.0f;
        }
    }
    void AddWithWeight(float *vertex, int dstIndex, int srcIndex, float weight) const {
        int d = dstIndex * numVertexElements;
        int s = srcIndex * numVertexElements;
        for (int i = 0; i < numVertexElements; ++i)
            vertex[d++] += vertex[s++] * weight;
    }
    void AddVaryingWithWeight(float *varying, int dstIndex, int srcIndex, float weight) const {
        int d = dstIndex * numVaryingElements;
        int s = srcIndex * numVaryingElements;
        for (int i = 0; i < numVaryingElements; ++i)
            varying[d++] += varying[s++] * weight;
    }
    
    int numVertexElements;
    int numVaryingElements;
};

extern "C" {

void computeFace(const VertexDescriptor *vdesc, float * vertex, float * varying, const int *F_IT, const int *F_ITa, int offset, int start, int end);

void computeEdge(const VertexDescriptor *vdesc, float *vertex, float * varying, const int *E_IT, const float *E_W, int offset, int start, int end);

void computeVertexA(const VertexDescriptor *vdesc, float *vertex, float * varying, const int *V_ITa, const float *V_W, int offset, int start, int end, int pass);

void computeVertexB(const VertexDescriptor *vdesc, float *vertex, float * varying, const int *V_ITa, const int *V_IT, const float *V_W, int offset, int start, int end);

void computeLoopVertexB(const VertexDescriptor *vdesc, float *vertex, float * varying, const int *V_ITa, const int *V_IT, const float *V_W, int offset, int start, int end);

void computeBilinearEdge(const VertexDescriptor *vdesc, float *vertex, float * varying, const int *E_IT, int offset, int start, int end);

void computeBilinearVertex(const VertexDescriptor *vdesc, float *vertex, float * varying, const int *V_ITa, int offset, int start, int end);

}

} // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;

} // end namespace OpenSubdiv

#endif /* OSD_CPU_KERNEL_H */