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#ifndef GU_VEC_BOX_H
#define GU_VEC_BOX_H

#include "foundation/PxTransform.h"
#include "common/PxPhysXCommonConfig.h"
#include "geometry/PxBoxGeometry.h"
#include "foundation/PxVecTransform.h"
#include "GuVecConvex.h"
#include "GuConvexSupportTable.h"

namespace physx
{
PX_PHYSX_COMMON_API extern const aos::BoolV boxVertexTable[8];

namespace Gu
{

#define BOX_MARGIN_RATIO		0.15f
#define	BOX_MIN_MARGIN_RATIO	0.05f
#define	BOX_SWEEP_MARGIN_RATIO	0.05f

#define BOX_MARGIN_CCD_RATIO		0.01f
#define	BOX_MIN_MARGIN_CCD_RATIO	0.005f


	class CapsuleV;


	PX_FORCE_INLINE void CalculateBoxMargin(const aos::Vec3VArg extent, PxReal& margin, PxReal& minMargin, PxReal& sweepMargin,
		const PxReal marginR = BOX_MARGIN_RATIO, const PxReal minMarginR = BOX_MIN_MARGIN_RATIO)
	{
		using namespace aos;

		PxReal minExtent;
		const FloatV min = V3ExtractMin(extent);
		FStore(min, &minExtent);

		margin = minExtent * marginR;
		minMargin = minExtent * minMarginR;
		sweepMargin = minExtent * BOX_SWEEP_MARGIN_RATIO;
	}

	PX_FORCE_INLINE aos::FloatV CalculateBoxTolerance(const aos::Vec3VArg extent)
	{
		using namespace aos;
		
		const FloatV r0 = FLoad(0.01f);
		const FloatV min = V3ExtractMin(extent);//FMin(V3GetX(extent), FMin(V3GetY(extent), V3GetZ(extent)));
		return FMul(min, r0);
	}

	//This method is called in the PCM contact gen for the refreshing contacts 
	PX_FORCE_INLINE aos::FloatV CalculatePCMBoxMargin(const aos::Vec3VArg extent, const PxReal toleranceLength, const PxReal toleranceMarginRatio = BOX_MARGIN_RATIO)
	{
		using namespace aos;
	
		const FloatV min = V3ExtractMin(extent);//FMin(V3GetX(extent), FMin(V3GetY(extent), V3GetZ(extent)));
		const FloatV toleranceMargin = FLoad(toleranceLength * toleranceMarginRatio);
		return FMin(FMul(min, FLoad(BOX_MARGIN_RATIO)), toleranceMargin);
	}

	PX_FORCE_INLINE aos::FloatV CalculateMTDBoxMargin(const aos::Vec3VArg extent)
	{
		using namespace aos;

		const FloatV min = V3ExtractMin(extent);//FMin(V3GetX(extent), FMin(V3GetY(extent), V3GetZ(extent)));
		return FMul(min, FLoad(BOX_MARGIN_RATIO));
	}

	class BoxV : public ConvexV
	{
	public:

		/**
		\brief Constructor
		*/
		PX_INLINE BoxV() : ConvexV(ConvexType::eBOX)
		{
		}

		PX_FORCE_INLINE BoxV(const aos::Vec3VArg origin, const aos::Vec3VArg extent) : 
			ConvexV(ConvexType::eBOX, origin), extents(extent)
		{
			CalculateBoxMargin(extent, margin, minMargin, sweepMargin);
		}
		
		//this constructor is used by the CCD system
		PX_FORCE_INLINE BoxV(const PxGeometry& geom) : ConvexV(ConvexType::eBOX, aos::V3Zero())
		{
			using namespace aos;
			const PxBoxGeometry& boxGeom = static_cast<const PxBoxGeometry&>(geom);
			const Vec3V extent = aos::V3LoadU(boxGeom.halfExtents);
			extents = extent;
			CalculateBoxMargin(extent, margin, minMargin, sweepMargin, BOX_MARGIN_CCD_RATIO, BOX_MIN_MARGIN_CCD_RATIO);
		}

		/**
		\brief Destructor
		*/
		PX_INLINE ~BoxV()
		{
		}

		PX_FORCE_INLINE void resetMargin(const PxReal toleranceLength)
		{
			minMargin = PxMin(toleranceLength * BOX_MIN_MARGIN_RATIO, minMargin);
		}

		//! Assignment operator
		PX_FORCE_INLINE const BoxV& operator=(const BoxV& other)
		{
			center	= other.center;
			extents	= other.extents;
			margin =  other.margin;
			minMargin = other.minMargin;
			sweepMargin = other.sweepMargin;
			return *this;
		}

		PX_FORCE_INLINE void populateVerts(const PxU8* inds, PxU32 numInds, const PxVec3* originalVerts, aos::Vec3V* verts)const
		{
			using namespace aos;

			for(PxU32 i=0; i<numInds; ++i)
				verts[i] = V3LoadU_SafeReadW(originalVerts[inds[i]]);	// PT: safe because of the way vertex memory is allocated in ConvexHullData (and 'populateVerts' is always called with polyData.mVerts)
		}

		PX_FORCE_INLINE aos::Vec3V supportPoint(const PxI32 index)const
		{
			using namespace aos;
			const BoolV con = boxVertexTable[index];
			return V3Sel(con, extents, V3Neg(extents));
		}  

		PX_FORCE_INLINE void getIndex(const aos::BoolV con, PxI32& index)const 
		{ 
			using namespace aos;
			index = PxI32(BGetBitMask(con) & 0x7); 
		}

		PX_FORCE_INLINE aos::Vec3V supportLocal(const aos::Vec3VArg dir)const  
		{
			using namespace aos;
			return V3Sel(V3IsGrtr(dir, V3Zero()), extents, V3Neg(extents));
		}

		//this is used in the sat test for the full contact gen
		PX_SUPPORT_INLINE void supportLocal(const aos::Vec3VArg dir, aos::FloatV& min, aos::FloatV& max)const
		{
			using namespace aos;
			const Vec3V point = V3Sel(V3IsGrtr(dir, V3Zero()), extents, V3Neg(extents));
			max = V3Dot(dir, point);
			min = FNeg(max);
		}

		PX_SUPPORT_INLINE aos::Vec3V supportRelative(const aos::Vec3VArg dir, const aos::PxMatTransformV& aTob, const aos::PxMatTransformV& aTobT) const  
		{
			//a is the current object, b is the other object, dir is in the local space of b
			using namespace aos;
//			const Vec3V _dir = aTob.rotateInv(dir);//relTra.rotateInv(dir);//from b to a
			const Vec3V _dir = aTobT.rotate(dir);//relTra.rotateInv(dir);//from b to a
			const Vec3V p =  supportLocal(_dir);
			//transfer p into the b space
			return aTob.transform(p);//relTra.transform(p);
		}

		PX_SUPPORT_INLINE aos::Vec3V supportLocal(const aos::Vec3VArg dir, PxI32& index)const  
		{
			using namespace aos;
			const BoolV comp = V3IsGrtr(dir, V3Zero());
			getIndex(comp, index);
			return  V3Sel(comp, extents, V3Neg(extents));
		}

		PX_SUPPORT_INLINE aos::Vec3V supportRelative(	const aos::Vec3VArg dir, const aos::PxMatTransformV& aTob,
															const aos::PxMatTransformV& aTobT, PxI32& index)const  
		{
			//a is the current object, b is the other object, dir is in the local space of b
			using namespace aos;
//			const Vec3V _dir = aTob.rotateInv(dir);//relTra.rotateInv(dir);//from b to a
			const Vec3V _dir = aTobT.rotate(dir);//relTra.rotateInv(dir);//from b to a
			const Vec3V p = supportLocal(_dir, index);
			//transfer p into the b space
			return aTob.transform(p);//relTra.transform(p);
		}

		aos::Vec3V  extents;
	};
}	//PX_COMPILE_TIME_ASSERT(sizeof(Gu::BoxV) == 96);

}

#endif