191 lines
6.6 KiB
C
191 lines
6.6 KiB
C
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of NVIDIA CORPORATION nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Copyright (c) 2008-2023 NVIDIA Corporation. All rights reserved.
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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
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#ifndef PX_SMOOTHING_H
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#define PX_SMOOTHING_H
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/** \addtogroup extensions
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@{
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*/
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#include "cudamanager/PxCudaContext.h"
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#include "cudamanager/PxCudaContextManager.h"
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#include "foundation/PxSimpleTypes.h"
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#include "foundation/PxVec4.h"
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#include "PxParticleSystem.h"
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#include "foundation/PxArray.h"
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#include "PxParticleGpu.h"
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#if !PX_DOXYGEN
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namespace physx
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{
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#endif
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#if PX_SUPPORT_GPU_PHYSX
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class PxgKernelLauncher;
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class PxParticleNeighborhoodProvider;
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/**
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\brief Ccomputes smoothed positions for a particle system to improve rendering quality
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*/
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class PxSmoothedPositionGenerator
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{
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public:
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/**
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\brief Schedules the compuation of smoothed positions on the specified cuda stream
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\param[in] gpuParticleSystem A gpu pointer to access particle system data
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\param[in] numParticles The number of particles
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\param[in] stream The stream on which the cuda call gets scheduled
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*/
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virtual void generateSmoothedPositions(PxGpuParticleSystem* gpuParticleSystem, PxU32 numParticles, CUstream stream) = 0;
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/**
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\brief Schedules the compuation of smoothed positions on the specified cuda stream
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\param[in] particlePositionsGpu A gpu pointer containing the particle positions
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\param[in] neighborhoodProvider A neighborhood provider object that supports fast neighborhood queries
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\param[in] numParticles The number of particles
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\param[in] particleContactOffset The particle contact offset
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\param[in] stream The stream on which the cuda call gets scheduled
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*/
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virtual void generateSmoothedPositions(PxVec4* particlePositionsGpu, PxParticleNeighborhoodProvider& neighborhoodProvider, PxU32 numParticles, PxReal particleContactOffset, CUstream stream) = 0;
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/**
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\brief Set a host buffer that holds the smoothed position data after the timestep completed
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\param[in] smoothedPositions A host buffer with memory for all particles already allocated
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*/
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virtual void setResultBufferHost(PxVec4* smoothedPositions) = 0;
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/**
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\brief Set a device buffer that holds the smoothed position data after the timestep completed
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\param[in] smoothedPositions A device buffer with memory for all particles already allocated
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*/
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virtual void setResultBufferDevice(PxVec4* smoothedPositions) = 0;
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/**
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\brief Sets the intensity of the position smoothing effect
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\param[in] smoothingStrenght The strength of the smoothing effect
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*/
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virtual void setSmoothing(float smoothingStrenght) = 0;
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/**
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\brief Gets the maximal number of particles
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\return The maximal number of particles
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*/
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virtual PxU32 getMaxParticles() const = 0;
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/**
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\brief Sets the maximal number of particles
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\param[in] maxParticles The maximal number of particles
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*/
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virtual void setMaxParticles(PxU32 maxParticles) = 0;
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/**
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\brief Gets the device pointer for the smoothed positions. Only available after calling setResultBufferHost or setResultBufferDevice
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\return The device pointer for the smoothed positions
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*/
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virtual PxVec4* getSmoothedPositionsDevicePointer() const = 0;
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/**
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\brief Enables or disables the smoothed position generator
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\param[in] enabled The boolean to set the generator to enabled or disabled
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*/
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virtual void setEnabled(bool enabled) = 0;
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/**
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\brief Allows to query if the smoothed position generator is enabled
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\return True if enabled, false otherwise
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*/
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virtual bool isEnabled() const = 0;
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/**
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\brief Releases the instance and its data
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*/
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virtual void release() = 0;
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/**
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\brief Destructor
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*/
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virtual ~PxSmoothedPositionGenerator() {}
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};
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/**
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\brief Default implementation of a particle system callback to trigger smoothed position calculations. A call to fetchResultsParticleSystem() on the
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PxScene will synchronize the work such that the caller knows that the post solve task completed.
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*/
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class PxSmoothedPositionCallback : public PxParticleSystemCallback
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{
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public:
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/**
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\brief Initializes the smoothing callback
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\param[in] smoothedPositionGenerator The smoothed position generator
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*/
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void initialize(PxSmoothedPositionGenerator* smoothedPositionGenerator)
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{
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mSmoothedPositionGenerator = smoothedPositionGenerator;
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}
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virtual void onPostSolve(const PxGpuMirroredPointer<PxGpuParticleSystem>& gpuParticleSystem, CUstream stream)
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{
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if (mSmoothedPositionGenerator)
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{
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mSmoothedPositionGenerator->generateSmoothedPositions(gpuParticleSystem.mDevicePtr, gpuParticleSystem.mHostPtr->mCommonData.mMaxParticles, stream);
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}
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}
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virtual void onBegin(const PxGpuMirroredPointer<PxGpuParticleSystem>& /*gpuParticleSystem*/, CUstream /*stream*/) { }
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virtual void onAdvance(const PxGpuMirroredPointer<PxGpuParticleSystem>& /*gpuParticleSystem*/, CUstream /*stream*/) { }
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private:
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PxSmoothedPositionGenerator* mSmoothedPositionGenerator;
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};
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#endif
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#if !PX_DOXYGEN
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} // namespace physx
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#endif
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/** @} */
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#endif
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