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#ifndef PHYSX_SNIPPET_DEFORMABLE_SURFACE_H
#define PHYSX_SNIPPET_DEFORMABLE_SURFACE_H

#include "PxPhysicsAPI.h"
#include "cudamanager/PxCudaContextManager.h"
#include "cudamanager/PxCudaContext.h"
#include "PxDeformableSurface.h"
#include "geometry/PxTriangle.h"
#include "geometry/PxTriangleMeshGeometry.h"
#include "extensions/PxCudaHelpersExt.h"

class TestSurface
{
public:
	TestSurface() :
		mPositionsInvMass(NULL),
		mDeformableSurface(NULL),
		mCudaContextManager(NULL),		
		mTriangleMesh(NULL)
	{ }

	TestSurface(physx::PxDeformableSurface* deformableSurface, physx::PxCudaContextManager* cudaContextManager) :
		mDeformableSurface(deformableSurface),
		mCudaContextManager(cudaContextManager)
	{
		physx::PxShape* shape = deformableSurface->getShape();

		const physx::PxTriangleMeshGeometry& triangleMeshGeom = static_cast<const physx::PxTriangleMeshGeometry&>(shape->getGeometry());
		mTriangleMesh = triangleMeshGeom.triangleMesh;

		mPositionsInvMass = PX_EXT_PINNED_MEMORY_ALLOC(physx::PxVec4, *cudaContextManager, mTriangleMesh->getNbVertices());
	}

	~TestSurface()
	{
	}

	void release()
	{
		if (mDeformableSurface)
			mDeformableSurface->release();
		PX_EXT_PINNED_MEMORY_FREE(*mCudaContextManager, mPositionsInvMass);
	}

	void copyDeformedVerticesFromGPUAsync(CUstream stream)
	{	
		physx::PxScopedCudaLock _lock(*mCudaContextManager);
		mCudaContextManager->getCudaContext()->memcpyDtoHAsync(mPositionsInvMass, reinterpret_cast<CUdeviceptr>(mDeformableSurface->getPositionInvMassBufferD()), mTriangleMesh->getNbVertices() * sizeof(physx::PxVec4), stream);
	}

	void copyDeformedVerticesFromGPU()
	{	
		physx::PxScopedCudaLock _lock(*mCudaContextManager);
		mCudaContextManager->getCudaContext()->memcpyDtoH(mPositionsInvMass, reinterpret_cast<CUdeviceptr>(mDeformableSurface->getPositionInvMassBufferD()), mTriangleMesh->getNbVertices() * sizeof(physx::PxVec4));
	}


	physx::PxVec4* mPositionsInvMass;
	physx::PxDeformableSurface* mDeformableSurface;
	physx::PxCudaContextManager* mCudaContextManager;
	physx::PxTriangleMesh* mTriangleMesh;
};

#endif // PHYSX_SNIPPET_DEFORMABLE_SURFACE_H