126 lines
4.0 KiB
C++
126 lines
4.0 KiB
C++
// 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) 2008-2025 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 DY_FRICTION_PATCH_STREAM_PAIR_H
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#define DY_FRICTION_PATCH_STREAM_PAIR_H
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#include "foundation/PxSimpleTypes.h"
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#include "PxvConfig.h"
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#include "foundation/PxMutex.h"
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#include "foundation/PxArray.h"
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// Each narrow phase thread has an input stream of friction patches from the
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// previous frame and an output stream of friction patches which will be
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// saved for next frame. The patches persist for exactly one frame at which
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// point they get thrown away.
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// There is a stream pair per thread. A contact callback reserves space
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// for its friction patches and gets a cookie in return that can stash
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// for next frame. Cookies are valid for one frame only.
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//
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// note that all friction patches reserved are guaranteed to be contiguous;
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// this might turn out to be a bit inefficient if we often have a large
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// number of friction patches
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#include "PxcNpMemBlockPool.h"
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namespace physx
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{
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class FrictionPatchStreamPair
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{
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public:
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FrictionPatchStreamPair(PxcNpMemBlockPool& blockPool);
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// reserve can fail and return null. Read should never fail
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template<class FrictionPatch>
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FrictionPatch* reserve(const PxU32 size);
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template<class FrictionPatch>
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const FrictionPatch* findInputPatches(const PxU8* ptr) const;
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void reset();
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PxcNpMemBlockPool& getBlockPool() { return mBlockPool;}
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private:
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PxcNpMemBlockPool& mBlockPool;
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PxcNpMemBlock* mBlock;
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PxU32 mUsed;
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FrictionPatchStreamPair& operator=(const FrictionPatchStreamPair&);
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};
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PX_FORCE_INLINE FrictionPatchStreamPair::FrictionPatchStreamPair(PxcNpMemBlockPool& blockPool):
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mBlockPool(blockPool), mBlock(NULL), mUsed(0)
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{
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}
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PX_FORCE_INLINE void FrictionPatchStreamPair::reset()
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{
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mBlock = NULL;
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mUsed = 0;
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}
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// reserve can fail and return null. Read should never fail
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template <class FrictionPatch>
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FrictionPatch* FrictionPatchStreamPair::reserve(const PxU32 size)
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{
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if(size>PxcNpMemBlock::SIZE)
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{
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return reinterpret_cast<FrictionPatch*>(-1);
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}
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PX_ASSERT(size <= PxcNpMemBlock::SIZE);
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FrictionPatch* ptr = NULL;
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if(mBlock == NULL || mUsed + size > PxcNpMemBlock::SIZE)
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{
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mBlock = mBlockPool.acquireFrictionBlock();
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mUsed = 0;
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}
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if(mBlock)
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{
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ptr = reinterpret_cast<FrictionPatch*>(mBlock->data+mUsed);
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mUsed += size;
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}
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return ptr;
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}
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template <class FrictionPatch>
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const FrictionPatch* FrictionPatchStreamPair::findInputPatches(const PxU8* ptr) const
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{
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return reinterpret_cast<const FrictionPatch*>(ptr);
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}
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}
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#endif
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