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#ifndef PX_COLLISION_CONVEXMESHBUILDER
#define PX_COLLISION_CONVEXMESHBUILDER

#include "GuConvexMeshData.h"
#include "PxCooking.h"
#include "ConvexPolygonsBuilder.h"

namespace physx
{
	//////////////////////////////////////////////////////////////////////////
	// Convex mesh builder, creates the convex mesh from given polygons and creates internal data
	class ConvexMeshBuilder
	{
	public:
									ConvexMeshBuilder(const bool buildGRBData);
									~ConvexMeshBuilder();

				// loads the computed or given convex hull from descriptor. 
				// the descriptor does contain polygons directly, triangles are not allowed
				bool				build(const PxConvexMeshDesc&, PxU32 gaussMapVertexLimit, bool validateOnly = false, bool userPolygons = false);

				// save the convex mesh into stream
				bool				save(PxOutputStream& stream, bool platformMismatch)		const;

				// copy the convex mesh into internal convex mesh, which can be directly used then
				bool				copy(Gu::ConvexHullData& convexData, PxU32& nb);

				// loads the convex mesh from given polygons
				bool				loadConvexHull(const PxConvexMeshDesc&, PxU32 gaussMapVertexLimit, bool userPolygons);

				// computed hull polygons from given triangles
				bool				computeHullPolygons(const PxU32& nbVerts,const PxVec3* verts, const PxU32& nbTriangles, const PxU32* triangles, PxAllocatorCallback& inAllocator,
										 PxU32& outNbVerts, PxVec3*& outVertices, PxU32& nbIndices, PxU32*& indices, PxU32& nbPolygons, PxHullPolygon*& polygons);

				// compute big convex data
				bool				computeGaussMaps();

				// compute mass, inertia tensor
				void				computeMassInfo(bool lowerPrecision);
// TEST_INTERNAL_OBJECTS
				// internal objects
				void				computeInternalObjects();
//~TEST_INTERNAL_OBJECTS

				// return computed mass
				PxReal				getMass() const { return mMass; }

				// return computed inertia tensor
				const PxMat33&		getInertia() const { return mInertia; }

				// return big convex data
				BigConvexData*		getBigConvexData() const  { return mBigConvexData; }

				// set big convex data
				void				setBigConvexData(BigConvexData* data) { mBigConvexData = data; }

		mutable	ConvexPolygonsBuilder	hullBuilder;

	protected:
		Gu::ConvexHullData			mHullData;		

		BigConvexData*				mBigConvexData;		//!< optional, only for large meshes! PT: redundant with ptr in chull data? Could also be end of other buffer
		PxReal						mMass;				//this is mass assuming a unit density that can be scaled by instances!
		PxMat33						mInertia;			//in local space of mesh!

	};

}

#endif