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// Copyright (c) 2008-2020 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.

#pragma once

#include "IterationState.h"
#include "SwCollision.h"
#include "SwSelfCollision.h"

namespace nv
{
namespace cloth
{

class SwCloth;
struct SwClothData;

template <typename T4f>
class SwSolverKernel
{
  public:
	SwSolverKernel(SwCloth const&, SwClothData&, SwKernelAllocator&, IterationStateFactory&);

	void operator()();

	// returns a conservative estimate of the
	// total memory requirements during a solve
	static size_t estimateTemporaryMemory(const SwCloth& c);

  private:
	void integrateParticles();
	void constrainTether();
	void solveFabric();
	void applyWind();
	void constrainMotion();
	void constrainSeparation();
	void collideParticles();
	void selfCollideParticles();
	void updateSleepState();

	void iterateCloth();
	void simulateCloth();

	SwCloth const& mCloth;
	SwClothData& mClothData;
	SwKernelAllocator& mAllocator;

	SwCollision<T4f> mCollision;
	SwSelfCollision<T4f> mSelfCollision;
	IterationState<T4f> mState;

  private:
	SwSolverKernel<T4f>& operator = (const SwSolverKernel<T4f>&);
	template <typename AccelerationIterator>
	void integrateParticles(AccelerationIterator& accelIt, const T4f&);
};

//explicit template instantiation declaration
#if NV_SIMD_SIMD
extern template class SwSolverKernel<Simd4f>;
#endif
#if NV_SIMD_SCALAR
extern template class SwSolverKernel<Scalar4f>;
#endif

}
}