// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//  * Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//  * Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//  * Neither the name of NVIDIA CORPORATION nor the names of its
//    contributors may be used to endorse or promote products derived
//    from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2008-2025 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.

#ifndef PXG_ANISOTROPY_H
#define PXG_ANISOTROPY_H


#include "PxAnisotropy.h"
#include "PxgAnisotropyData.h"
#include "foundation/PxUserAllocated.h"
#include "PxgKernelLauncher.h"

#if !PX_DOXYGEN
namespace physx
{
#endif

#if PX_SUPPORT_GPU_PHYSX		

	class PxgAnisotropyGenerator : public PxAnisotropyGenerator, public PxUserAllocated
	{
		PxgKernelLauncher mKernelLauncher;
		PxAnisotropyData mAnisotropyDataHost;
		PxAnisotropyData* mAnisotropyDataPerParticleSystemDevice;
		PxU32 mNumParticles;
		bool mDirty;
		bool mOwnsAnisotropyGPUBuffers;
		PxVec4* mAnisotropy1;
		PxVec4* mAnisotropy2;
		PxVec4* mAnisotropy3;
		bool mEnabled;

		void releaseGPUAnisotropyBuffers();

		void allocateGPUAnisotropyBuffers();

	public:

		PxgAnisotropyGenerator(PxgKernelLauncher& cudaContextManager, PxU32 maxNumParticles, PxReal anisotropyScale, PxReal minAnisotropy, PxReal maxAnisotropy);

		virtual ~PxgAnisotropyGenerator() { }

		virtual void setAnisotropyMax(float maxAnisotropy)
		{
			mAnisotropyDataHost.mAnisotropyMax = maxAnisotropy;
			mDirty = true;
		}

		virtual void setAnisotropyMin(float minAnisotropy)
		{
			mAnisotropyDataHost.mAnisotropyMin = minAnisotropy;
			mDirty = true;
		}

		virtual void setAnisotropyScale(float anisotropyScale)
		{
			mAnisotropyDataHost.mAnisotropy = anisotropyScale;
			mDirty = true;
		}

		virtual void release();

		virtual void setResultBufferHost(PxVec4* anisotropy1, PxVec4* anisotropy2, PxVec4* anisotropy3);

		virtual void setResultBufferDevice(PxVec4* anisotropy1, PxVec4* anisotropy2, PxVec4* anisotropy3);

		virtual void generateAnisotropy(PxGpuParticleSystem* gpuParticleSystem, PxU32 numParticles, CUstream stream);

		virtual void generateAnisotropy(PxVec4* particlePositionsGpu, PxParticleNeighborhoodProvider& neighborhoodProvider, PxU32 numParticles, PxReal particleContactOffset, CUstream stream);

		virtual PxU32 getMaxParticles() const
		{
			return mNumParticles;
		}

		virtual void setMaxParticles(PxU32 maxParticles);

		virtual PxVec4* getAnisotropy1DevicePointer() const
		{
			return mAnisotropyDataHost.mAnisotropy_q1;
		}

		virtual PxVec4* getAnisotropy2DevicePointer() const
		{
			return mAnisotropyDataHost.mAnisotropy_q2;
		}

		virtual PxVec4* getAnisotropy3DevicePointer() const
		{
			return mAnisotropyDataHost.mAnisotropy_q3;
		}

		virtual void setEnabled(bool enabled)
		{
			mEnabled = enabled;
		}

		virtual bool isEnabled() const
		{
			return mEnabled;
		}
	};

#endif	

#if !PX_DOXYGEN
} // namespace physx
#endif

#endif