127 lines
4.2 KiB
C++
127 lines
4.2 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 "ExtJoint.h"
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using namespace physx;
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using namespace Ext;
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PxConstraint* physx::resolveConstraintPtr(PxDeserializationContext& v,
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PxConstraint* old,
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PxConstraintConnector* connector,
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PxConstraintShaderTable &shaders)
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{
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v.translatePxBase(old);
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PxConstraint* new_nx = static_cast<PxConstraint*>(old);
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new_nx->setConstraintFunctions(*connector, shaders);
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return new_nx;
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}
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//~PX_SERIALIZATION
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static void normalToTangents(const PxVec3& n, PxVec3& t1, PxVec3& t2)
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{
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const PxReal m_sqrt1_2 = PxReal(0.7071067811865475244008443621048490);
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if(fabsf(n.z) > m_sqrt1_2)
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{
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const PxReal a = n.y*n.y + n.z*n.z;
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const PxReal k = PxReal(1.0)/PxSqrt(a);
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t1 = PxVec3(0,-n.z*k,n.y*k);
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t2 = PxVec3(a*k,-n.x*t1.z,n.x*t1.y);
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}
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else
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{
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const PxReal a = n.x*n.x + n.y*n.y;
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const PxReal k = PxReal(1.0)/PxSqrt(a);
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t1 = PxVec3(-n.y*k,n.x*k,0);
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t2 = PxVec3(-n.z*t1.y,n.z*t1.x,a*k);
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}
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t1.normalize();
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t2.normalize();
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}
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void PxSetJointGlobalFrame(PxJoint& joint, const PxVec3* wsAnchor, const PxVec3* axisIn)
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{
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PxRigidActor* actors[2];
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joint.getActors(actors[0], actors[1]);
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PxTransform localPose[2];
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for(PxU32 i=0; i<2; i++)
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localPose[i] = PxTransform(PxIdentity);
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// 1) global anchor
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if(wsAnchor)
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{
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//transform anchorPoint to local space
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for(PxU32 i=0; i<2; i++)
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localPose[i].p = actors[i] ? actors[i]->getGlobalPose().transformInv(*wsAnchor) : *wsAnchor;
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}
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// 2) global axis
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if(axisIn)
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{
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PxVec3 localAxis[2], localNormal[2];
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//find 2 orthogonal vectors.
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//gotta do this in world space, if we choose them
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//separately in local space they won't match up in worldspace.
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PxVec3 axisw = *axisIn;
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axisw.normalize();
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PxVec3 normalw, binormalw;
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::normalToTangents(axisw, binormalw, normalw);
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//because axis is supposed to be the Z axis of a frame with the other two being X and Y, we need to negate
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//Y to make the frame right handed. Note that the above call makes a right handed frame if we pass X --> Y,Z, so
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//it need not be changed.
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for(PxU32 i=0; i<2; i++)
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{
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if(actors[i])
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{
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const PxTransform& m = actors[i]->getGlobalPose();
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PxMat33 mM(m.q);
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localAxis[i] = mM.transformTranspose(axisw);
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localNormal[i] = mM.transformTranspose(normalw);
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}
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else
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{
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localAxis[i] = axisw;
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localNormal[i] = normalw;
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}
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PxMat33 rot(localAxis[i], localNormal[i], localAxis[i].cross(localNormal[i]));
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localPose[i].q = PxQuat(rot);
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localPose[i].q.normalize();
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}
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}
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for(PxU32 i=0; i<2; i++)
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joint.setLocalPose(static_cast<PxJointActorIndex::Enum>( i ), localPose[i]);
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}
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