144 lines
5.1 KiB
C++
144 lines
5.1 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) 2008-2019 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 PXS_MATERIALCOMBINER_H
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#define PXS_MATERIALCOMBINER_H
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#include "PxsMaterialCore.h"
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namespace physx
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{
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class PxsMaterialCombiner
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{
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public:
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class PxsCombinedMaterial
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{
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public:
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PxReal staFriction;
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PxReal dynFriction;
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PxU32 flags; //PxMaterialFlag::eDISABLE_FRICTION, PxMaterialFlag::eDISABLE_STRONG_FRICTION.
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};
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static PxReal combineRestitution(const PxsMaterialData& material0, const PxsMaterialData& material1);
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PxsMaterialCombiner(PxReal staticFrictionScaling, PxReal dynamicFrictionScaling);
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PxsCombinedMaterial combineIsotropicFriction(const PxsMaterialData& material0, const PxsMaterialData& material1);
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//ML:: move this function to header file to avoid LHS in Xbox
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PX_FORCE_INLINE void combineIsotropicFriction(const PxsMaterialData& mat0, const PxsMaterialData& mat1, PxReal& dynamicFriction, PxReal& staticFriction, PxU32& flags)
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{
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const PxU32 combineFlags= (mat0.flags | mat1.flags); //& (PxMaterialFlag::eDISABLE_STRONG_FRICTION|PxMaterialFlag::eDISABLE_FRICTION); //eventually set DisStrongFric flag, lower all others.
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if (!(combineFlags & PxMaterialFlag::eDISABLE_FRICTION))
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{
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const PxI32 fictionCombineMode = PxMax(mat0.getFrictionCombineMode(), mat1.getFrictionCombineMode());
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PxReal dynFriction = 0.f;
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PxReal staFriction = 0.f;
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switch (fictionCombineMode)
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{
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case PxCombineMode::eAVERAGE:
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dynFriction = 0.5f * (mat0.dynamicFriction + mat1.dynamicFriction);
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staFriction = 0.5f * (mat0.staticFriction + mat1.staticFriction);
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break;
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case PxCombineMode::eMIN:
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dynFriction = PxMin(mat0.dynamicFriction, mat1.dynamicFriction);
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staFriction = PxMin(mat0.staticFriction, mat1.staticFriction);
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break;
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case PxCombineMode::eMULTIPLY:
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dynFriction = (mat0.dynamicFriction * mat1.dynamicFriction);
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staFriction = (mat0.staticFriction * mat1.staticFriction);
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break;
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case PxCombineMode::eMAX:
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dynFriction = PxMax(mat0.dynamicFriction, mat1.dynamicFriction);
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staFriction = PxMax(mat0.staticFriction, mat1.staticFriction);
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break;
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}
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dynFriction*=mDynamicFrictionScaling;
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staFriction*=mStaticFrictionScaling;
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//isotropic case
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const PxReal fDynFriction = PxMax(dynFriction, 0.f);
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const PxReal fStaFriction = physx::intrinsics::fsel(staFriction - fDynFriction, staFriction*mStaticFrictionScaling, fDynFriction);
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/*dest.dynFriction = fDynFriction;
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dest.staFriction = fStaFriction;*/
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dynamicFriction = fDynFriction;
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staticFriction = fStaFriction;
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flags = combineFlags;
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}
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else
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{
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/* dest.flags |= PxMaterialFlag::eDISABLE_STRONG_FRICTION;
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dest.staFriction = 0.0f;
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dest.dynFriction = 0.0f;*/
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flags = (combineFlags | PxMaterialFlag::eDISABLE_STRONG_FRICTION);
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dynamicFriction = 0.f;
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staticFriction = 0.f;
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}
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}
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//private:
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protected:
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static PX_FORCE_INLINE PxReal combineScalars(PxReal a, PxReal b, PxI32 nxCombineMode)
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{
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switch (nxCombineMode)
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{
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case PxCombineMode::eAVERAGE:
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return 0.5f * (a + b);
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case PxCombineMode::eMIN:
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return PxMin(a,b);
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case PxCombineMode::eMULTIPLY:
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return a * b;
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case PxCombineMode::eMAX:
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return PxMax(a,b);
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default:
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/* Ps::getFoundation().error(PxErrorCode::eINVALID_OPERATION, __FILE__, __LINE__,
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"Sc::MaterialCombiner::combineScalars(): unknown combine mode");*/
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return PxReal(0);
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}
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}
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PxReal mStaticFrictionScaling, mDynamicFrictionScaling;
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};
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}
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#endif
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