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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.

#pragma once

#include "NvCloth/Solver.h"
#include "CuClothData.h"
#include "CuPinnedAllocator.h"
#include "CuContextLock.h"
#include "CuDeviceVector.h"
#include "../SwInterCollision.h"
#include "CuSolverKernel.h"

namespace nv
{

namespace cloth
{

class CuCloth;
class CuFabric;
struct PhaseConfig;
struct CuKernelData;

class CuSolver : private CuContextLock, public Solver
{
	CuSolver(const CuSolver&); // not implemented
	CuSolver& operator = (const CuSolver&); // not implemented

public:
	CuSolver(CuFactory&);
	~CuSolver();

	virtual void addCloth(Cloth*) override;
	virtual void addCloths(Range<Cloth*> cloths) override;
	virtual void removeCloth(Cloth*) override;
	virtual int getNumCloths() const override;
	virtual Cloth * const * getClothList() const override;

	// functions executing the simulation work.
	virtual bool beginSimulation(float dt);
	virtual void simulateChunk(int idx);
	virtual void endSimulation();
	virtual int getSimulationChunkCount() const override;

	virtual bool hasError() const
	{
		return mCudaError;
	}

	virtual void setInterCollisionDistance(float distance)
	{
		mInterCollisionDistance = distance;
	}
	virtual float getInterCollisionDistance() const
	{
		return mInterCollisionDistance;
	}
	virtual void setInterCollisionStiffness(float stiffness)
	{
		mInterCollisionStiffness = stiffness;
	}
	virtual float getInterCollisionStiffness() const
	{
		return mInterCollisionStiffness;
	}
	virtual void setInterCollisionNbIterations(uint32_t nbIterations)
	{
		mInterCollisionIterations = nbIterations;
	}
	virtual uint32_t getInterCollisionNbIterations() const
	{
		return mInterCollisionIterations;
	}
	virtual void setInterCollisionFilter(InterCollisionFilter filter)
	{
		mInterCollisionFilter = filter;
	}

  private:
	// add cloth helper functions
	void addClothAppend(Cloth* cloth);
	void addClothUpdateData();

	void updateKernelData(); // context needs to be acquired

	// simulate helper functions
	void beginFrame();
	static void CUDA_CB KernelFinished(CUstream stream, CUresult status, void *userData);
	void executeKernel();
	void endFrame();

	void interCollision();

  private:
	CuFactory& mFactory;

	typedef Vector<CuCloth*>::Type ClothVector;
	ClothVector mCloths;

	CuDeviceVector<CuClothData> mClothData;
	CuHostVector<CuClothData, CU_MEMHOSTALLOC_WRITECOMBINED>::Type mClothDataHostCopy;
	bool mClothDataDirty;

	CuHostVector<CuFrameData, CU_MEMHOSTALLOC_DEVICEMAP>::Type mFrameData;

	CuHostVector<CuIterationData, CU_MEMHOSTALLOC_DEVICEMAP>::Type mIterationData;
	CuIterationData* mIterationDataBegin; // corresponding device ptr

	float mFrameDt;

	uint32_t mSharedMemorySize;
	uint32_t mSharedMemoryLimit;

	CUstream mStream;
	CUfunction mKernelFunction;
	int mKernelSharedMemorySize;
	CuKernelData mKernelDataHost;
	CuDevicePointer<uint32_t> mClothIndex;

	float mInterCollisionDistance;
	float mInterCollisionStiffness;
	uint32_t mInterCollisionIterations;
	InterCollisionFilter mInterCollisionFilter;
	void* mInterCollisionScratchMem;
	uint32_t mInterCollisionScratchMemSize;
	Vector<SwInterCollisionData>::Type mInterCollisionInstances;

	uint64_t mSimulateNvtxRangeId;

	void* mProfileBuffer;
	uint32_t mProfileBaseId;

	bool mCudaError;

	void* mCuptiEventProfiler;

	friend void record(const CuSolver&);

	void* mSimulateProfileEventData;
};
}
}