GuAABBTreeNode.h

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#ifndef GU_AABBTREE_NODE_H
#define GU_AABBTREE_NODE_H
 
#include "common/PxPhysXCommonConfig.h"
#include "foundation/PxBounds3.h"
#include "foundation/PxVecMath.h"
#include "foundation/PxUserAllocated.h"
 
namespace physx
{
using namespace aos;
 
namespace Gu
{
    struct BVHNode : public PxUserAllocated
    {
        public:
        PX_FORCE_INLINE                 BVHNode()                                       {}
        PX_FORCE_INLINE                 ~BVHNode()                                      {}
 
        PX_FORCE_INLINE PxU32           isLeaf()                                const   { return mData&1;           }
        PX_FORCE_INLINE const PxU32*    getPrimitives(const PxU32* base)        const   { return base + (mData>>5); }
        PX_FORCE_INLINE PxU32*          getPrimitives(PxU32* base)                      { return base + (mData>>5); }
        PX_FORCE_INLINE PxU32           getPrimitiveIndex()                     const   { return mData>>5;          }
        PX_FORCE_INLINE PxU32           getNbPrimitives()                       const   { return (mData>>1)&15;     }
        PX_FORCE_INLINE PxU32           getPosIndex()                           const   { return mData>>1;          }
        PX_FORCE_INLINE PxU32           getNegIndex()                           const   { return (mData>>1) + 1;    }
        PX_FORCE_INLINE const BVHNode*  getPos(const BVHNode* base)             const   { return base + (mData>>1);                                 }
        PX_FORCE_INLINE const BVHNode*  getNeg(const BVHNode* base)             const   { const BVHNode* P = getPos(base); return P ? P+1 : NULL;   }
        PX_FORCE_INLINE BVHNode*        getPos(BVHNode* base)                           { return base + (mData >> 1);                               }
        PX_FORCE_INLINE BVHNode*        getNeg(BVHNode* base)                           { BVHNode* P = getPos(base); return P ? P + 1 : NULL;       }
 
        PX_FORCE_INLINE PxU32           getNbRuntimePrimitives()                const   { return (mData>>1)&15;     }
        PX_FORCE_INLINE void            setNbRunTimePrimitives(PxU32 val)
                                        {
                                            PX_ASSERT(val<16);
                                            PxU32 data = mData & ~(15<<1);
                                            data |= val<<1;
                                            mData = data;
                                        }
 
        PX_FORCE_INLINE void            getAABBCenterExtentsV(Vec3V* center, Vec3V* extents) const
                                        {
                                            const Vec4V minV = V4LoadU(&mBV.minimum.x);
                                            const Vec4V maxV = V4LoadU(&mBV.maximum.x);
 
                                            const float half = 0.5f;
                                            const FloatV halfV = FLoad(half);
 
                                            *extents = Vec3V_From_Vec4V(V4Scale(V4Sub(maxV, minV), halfV));
                                            *center = Vec3V_From_Vec4V(V4Scale(V4Add(maxV, minV), halfV));
                                        }
 
        PX_FORCE_INLINE void            getAABBCenterExtentsV2(Vec3V* center, Vec3V* extents) const
                                        {
                                            const Vec4V minV = V4LoadU(&mBV.minimum.x);
                                            const Vec4V maxV = V4LoadU(&mBV.maximum.x);
 
                                            *extents = Vec3V_From_Vec4V(V4Sub(maxV, minV));
                                            *center = Vec3V_From_Vec4V(V4Add(maxV, minV));
                                        }
 
                        PxBounds3       mBV;    // Global bounding-volume enclosing all the node-related primitives
                        PxU32           mData;  // 27 bits node or prim index|4 bits #prims|1 bit leaf
    };
 
} // namespace Gu
}
 
#endif // GU_AABBTREE_NODE_H