GuCookingConvexHullLib.h

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#ifndef GU_COOKING_CONVEX_HULL_LIB_H
#define GU_COOKING_CONVEX_HULL_LIB_H
 
#include "cooking/PxConvexMeshDesc.h"
#include "cooking/PxCooking.h"
 
namespace physx
{   
    // base class for the convex hull libraries - inflation based and quickhull
    class ConvexHullLib
    {       
        PX_NOCOPY(ConvexHullLib)
    public:
        // functions
        ConvexHullLib(const PxConvexMeshDesc& desc, const PxCookingParams& params)
            : mConvexMeshDesc(desc), mCookingParams(params), mSwappedIndices(NULL),
            mShiftedVerts(NULL)
        {
        }
 
        virtual ~ConvexHullLib();
            
        // computes the convex hull from provided points
        virtual PxConvexMeshCookingResult::Enum createConvexHull() = 0;
 
        // fills the PxConvexMeshDesc with computed hull data
        virtual void fillConvexMeshDesc(PxConvexMeshDesc& desc) = 0;
 
        // compute the edge list information if possible
        virtual bool createEdgeList(const PxU32 nbIndices, const PxU8* indices, PxU8** hullDataFacesByEdges8, PxU16** edgeData16, PxU16** edges) = 0;
 
        static const PxU32 gpuMaxVertsPerFace = 31;
 
    protected:
 
        // clean input vertices from duplicates, normalize etc.
        bool cleanupVertices(PxU32 svcount, // input vertex count
            const PxVec3* svertices, // vertices
            PxU32 stride,       // stride
            PxU32& vcount,      // output number of vertices
            PxVec3* vertices);  // location to store the results.           
 
        // shift vertices around origin and clean input vertices from duplicates, normalize etc.
        bool shiftAndcleanupVertices(PxU32 svcount, // input vertex count
            const PxVec3* svertices, // vertices
            PxU32 stride,       // stride
            PxU32& vcount,      // output number of vertices
            PxVec3* vertices);  // location to store the results.           
 
        void swapLargestFace(PxConvexMeshDesc& desc);
 
        void shiftConvexMeshDesc(PxConvexMeshDesc& desc);
 
    protected:
        const PxConvexMeshDesc& mConvexMeshDesc;
        const PxCookingParams&  mCookingParams;
        PxU32*                  mSwappedIndices;
        PxVec3                  mOriginShift;
        PxVec3*                 mShiftedVerts;
    };
}
 
#endif