103 lines
4.1 KiB
C++
103 lines
4.1 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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#include "PxsMaterialCombiner.h"
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#include "PsMathUtils.h"
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#include "CmPhysXCommon.h"
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#include "PsFoundation.h"
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namespace physx
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{
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PxsMaterialCombiner::PxsMaterialCombiner(PxReal staticFrictionScaling, PxReal dynamicFrictionScaling)
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: mStaticFrictionScaling(staticFrictionScaling), mDynamicFrictionScaling(dynamicFrictionScaling)
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{}
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PxReal PxsMaterialCombiner::combineRestitution(const PxsMaterialData& mat0, const PxsMaterialData& mat1)
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{
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/*return combineScalars(mat0.restitution, mat1.restitution, PxMax(mat0.restitutionCombineMode, mat1.restitutionCombineMode));*/
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return combineScalars(mat0.restitution, mat1.restitution, PxMax(mat0.getRestitutionCombineMode(), mat1.getRestitutionCombineMode()));
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}
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PxsMaterialCombiner::PxsCombinedMaterial PxsMaterialCombiner::combineIsotropicFriction(const PxsMaterialData& mat0, const PxsMaterialData& mat1)
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{
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PxsCombinedMaterial dest;
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dest.flags = (mat0.flags | mat1.flags); //& (PxMaterialFlag::eDISABLE_STRONG_FRICTION|PxMaterialFlag::eDISABLE_FRICTION); //eventually set DisStrongFric flag, lower all others.
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if (!(dest.flags & 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, fDynFriction);
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dest.dynFriction = fDynFriction;
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dest.staFriction = fStaFriction;
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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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}
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return dest;
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}
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}
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