1815 lines
70 KiB
C++
1815 lines
70 KiB
C++
/*
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Bullet Continuous Collision Detection and Physics Library
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Copyright (c) 2003-2012 Erwin Coumans http://bulletphysics.org
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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//enable BT_SOLVER_DEBUG if you experience solver crashes
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//#define BT_SOLVER_DEBUG
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//#define COMPUTE_IMPULSE_DENOM 1
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//It is not necessary (redundant) to refresh contact manifolds, this refresh has been moved to the collision algorithms.
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#define DISABLE_JOINTS
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#include "btPgsJacobiSolver.h"
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#include "BulletCommon/btMinMax.h"
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#include "btTypedConstraint.h"
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#include <new>
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#include "BulletCommon/btStackAlloc.h"
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#include "BulletCommon/btQuickprof.h"
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//#include "btSolverBody.h"
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//#include "btSolverConstraint.h"
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#include "BulletCommon/btAlignedObjectArray.h"
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#include <string.h> //for memset
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//#include "../../dynamics/basic_demo/Stubs/AdlContact4.h"
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#include "../../gpu_sat/host/btContact4.h"
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bool usePgs = false;//true;
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int gNumSplitImpulseRecoveries2 = 0;
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#include "btRigidBody.h"
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//#include "../../dynamics/basic_demo/Stubs/AdlRigidBody.h"
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#include "../../gpu_sat/host/btRigidBodyCL.h"
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btTransform getWorldTransform(btRigidBodyCL* rb)
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{
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btTransform newTrans;
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newTrans.setOrigin(rb->m_pos);
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newTrans.setRotation(rb->m_quat);
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return newTrans;
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}
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const btMatrix3x3& getInvInertiaTensorWorld(btInertiaCL* inertia)
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{
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return inertia->m_invInertiaWorld;
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}
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const btVector3& getLinearVelocity(btRigidBodyCL* rb)
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{
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return rb->m_linVel;
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}
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const btVector3& getAngularVelocity(btRigidBodyCL* rb)
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{
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return rb->m_angVel;
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}
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btVector3 getVelocityInLocalPoint(btRigidBodyCL* rb, const btVector3& rel_pos)
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{
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//we also calculate lin/ang velocity for kinematic objects
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return getLinearVelocity(rb) + getAngularVelocity(rb).cross(rel_pos);
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}
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struct btContactPoint
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{
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btVector3 m_positionWorldOnA;
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btVector3 m_positionWorldOnB;
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btVector3 m_normalWorldOnB;
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btScalar m_appliedImpulse;
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btScalar m_distance;
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btScalar m_combinedRestitution;
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///information related to friction
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btScalar m_combinedFriction;
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btVector3 m_lateralFrictionDir1;
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btVector3 m_lateralFrictionDir2;
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btScalar m_appliedImpulseLateral1;
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btScalar m_appliedImpulseLateral2;
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btScalar m_combinedRollingFriction;
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btScalar m_contactMotion1;
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btScalar m_contactMotion2;
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btScalar m_contactCFM1;
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btScalar m_contactCFM2;
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bool m_lateralFrictionInitialized;
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btVector3 getPositionWorldOnA()
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{
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return m_positionWorldOnA;
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}
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btVector3 getPositionWorldOnB()
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{
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return m_positionWorldOnB;
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}
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btScalar getDistance()
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{
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return m_distance;
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}
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};
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void getContactPoint(btContact4* contact, int contactIndex, btContactPoint& pointOut)
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{
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pointOut.m_appliedImpulse = 0.f;
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pointOut.m_appliedImpulseLateral1 = 0.f;
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pointOut.m_appliedImpulseLateral2 = 0.f;
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pointOut.m_combinedFriction = contact->getFrictionCoeff();
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pointOut.m_combinedRestitution = contact->getRestituitionCoeff();
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pointOut.m_combinedRollingFriction = 0.f;
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pointOut.m_contactCFM1 = 0.f;
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pointOut.m_contactCFM2 = 0.f;
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pointOut.m_contactMotion1 = 0.f;
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pointOut.m_contactMotion2 = 0.f;
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pointOut.m_distance = contact->getPenetration(contactIndex)+0.01;
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btVector3 n = contact->m_worldNormal;
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btVector3 normalOnB(-n);
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normalOnB.normalize();
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btVector3 l1,l2;
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btPlaneSpace1(normalOnB,l1,l2);
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pointOut.m_normalWorldOnB = normalOnB;
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//printf("normalOnB = %f,%f,%f\n",normalOnB.getX(),normalOnB.getY(),normalOnB.getZ());
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pointOut.m_lateralFrictionDir1 = l1;
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pointOut.m_lateralFrictionDir2 = l2;
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pointOut.m_lateralFrictionInitialized = true;
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btVector3 worldPosB = contact->m_worldPos[contactIndex];
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pointOut.m_positionWorldOnB = worldPosB;
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pointOut.m_positionWorldOnA = worldPosB+normalOnB*pointOut.m_distance;
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}
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int getNumContacts(btContact4* contact)
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{
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return contact->getNPoints();
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}
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btPgsJacobiSolver::btPgsJacobiSolver()
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:m_btSeed2(0),m_usePgs(usePgs)
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{
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}
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btPgsJacobiSolver::~btPgsJacobiSolver()
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{
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}
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void btPgsJacobiSolver::solveContacts(int numBodies, btRigidBodyCL* bodies, btInertiaCL* inertias, int numContacts, btContact4* contacts)
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{
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btContactSolverInfo infoGlobal;
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infoGlobal.m_splitImpulse = false;
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infoGlobal.m_timeStep = 1.f/60.f;
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infoGlobal.m_numIterations = 4;//4;
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// infoGlobal.m_solverMode|=SOLVER_USE_2_FRICTION_DIRECTIONS|SOLVER_INTERLEAVE_CONTACT_AND_FRICTION_CONSTRAINTS|SOLVER_DISABLE_VELOCITY_DEPENDENT_FRICTION_DIRECTION;
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//infoGlobal.m_solverMode|=SOLVER_USE_2_FRICTION_DIRECTIONS|SOLVER_INTERLEAVE_CONTACT_AND_FRICTION_CONSTRAINTS;
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infoGlobal.m_solverMode|=SOLVER_USE_2_FRICTION_DIRECTIONS;
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//if (infoGlobal.m_solverMode & SOLVER_INTERLEAVE_CONTACT_AND_FRICTION_CONSTRAINTS)
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//if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS) && (infoGlobal.m_solverMode & SOLVER_DISABLE_VELOCITY_DEPENDENT_FRICTION_DIRECTION))
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solveGroup(bodies,inertias,numBodies,contacts,numContacts,0,0,infoGlobal);
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if (!numContacts)
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return;
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}
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/// btPgsJacobiSolver Sequentially applies impulses
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btScalar btPgsJacobiSolver::solveGroup(btRigidBodyCL* bodies,
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btInertiaCL* inertias,
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int numBodies,
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btContact4* manifoldPtr,
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int numManifolds,
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btTypedConstraint** constraints,
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int numConstraints,
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const btContactSolverInfo& infoGlobal)
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{
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BT_PROFILE("solveGroup");
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//you need to provide at least some bodies
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solveGroupCacheFriendlySetup( bodies, inertias,numBodies, manifoldPtr, numManifolds,constraints, numConstraints,infoGlobal);
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solveGroupCacheFriendlyIterations(constraints, numConstraints,infoGlobal);
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solveGroupCacheFriendlyFinish(bodies, inertias,numBodies, infoGlobal);
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return 0.f;
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}
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#ifdef USE_SIMD
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#include <emmintrin.h>
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#define btVecSplat(x, e) _mm_shuffle_ps(x, x, _MM_SHUFFLE(e,e,e,e))
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static inline __m128 btSimdDot3( __m128 vec0, __m128 vec1 )
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{
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__m128 result = _mm_mul_ps( vec0, vec1);
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return _mm_add_ps( btVecSplat( result, 0 ), _mm_add_ps( btVecSplat( result, 1 ), btVecSplat( result, 2 ) ) );
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}
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#endif//USE_SIMD
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// Project Gauss Seidel or the equivalent Sequential Impulse
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void btPgsJacobiSolver::resolveSingleConstraintRowGenericSIMD(btSolverBody& body1,btSolverBody& body2,const btSolverConstraint& c)
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{
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#ifdef USE_SIMD
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__m128 cpAppliedImp = _mm_set1_ps(c.m_appliedImpulse);
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__m128 lowerLimit1 = _mm_set1_ps(c.m_lowerLimit);
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__m128 upperLimit1 = _mm_set1_ps(c.m_upperLimit);
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__m128 deltaImpulse = _mm_sub_ps(_mm_set1_ps(c.m_rhs), _mm_mul_ps(_mm_set1_ps(c.m_appliedImpulse),_mm_set1_ps(c.m_cfm)));
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__m128 deltaVel1Dotn = _mm_add_ps(btSimdDot3(c.m_contactNormal.mVec128,body1.internalGetDeltaLinearVelocity().mVec128), btSimdDot3(c.m_relpos1CrossNormal.mVec128,body1.internalGetDeltaAngularVelocity().mVec128));
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__m128 deltaVel2Dotn = _mm_sub_ps(btSimdDot3(c.m_relpos2CrossNormal.mVec128,body2.internalGetDeltaAngularVelocity().mVec128),btSimdDot3((c.m_contactNormal).mVec128,body2.internalGetDeltaLinearVelocity().mVec128));
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deltaImpulse = _mm_sub_ps(deltaImpulse,_mm_mul_ps(deltaVel1Dotn,_mm_set1_ps(c.m_jacDiagABInv)));
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deltaImpulse = _mm_sub_ps(deltaImpulse,_mm_mul_ps(deltaVel2Dotn,_mm_set1_ps(c.m_jacDiagABInv)));
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btSimdScalar sum = _mm_add_ps(cpAppliedImp,deltaImpulse);
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btSimdScalar resultLowerLess,resultUpperLess;
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resultLowerLess = _mm_cmplt_ps(sum,lowerLimit1);
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resultUpperLess = _mm_cmplt_ps(sum,upperLimit1);
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__m128 lowMinApplied = _mm_sub_ps(lowerLimit1,cpAppliedImp);
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deltaImpulse = _mm_or_ps( _mm_and_ps(resultLowerLess, lowMinApplied), _mm_andnot_ps(resultLowerLess, deltaImpulse) );
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c.m_appliedImpulse = _mm_or_ps( _mm_and_ps(resultLowerLess, lowerLimit1), _mm_andnot_ps(resultLowerLess, sum) );
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__m128 upperMinApplied = _mm_sub_ps(upperLimit1,cpAppliedImp);
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deltaImpulse = _mm_or_ps( _mm_and_ps(resultUpperLess, deltaImpulse), _mm_andnot_ps(resultUpperLess, upperMinApplied) );
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c.m_appliedImpulse = _mm_or_ps( _mm_and_ps(resultUpperLess, c.m_appliedImpulse), _mm_andnot_ps(resultUpperLess, upperLimit1) );
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__m128 linearComponentA = _mm_mul_ps(c.m_contactNormal.mVec128,body1.internalGetInvMass().mVec128);
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__m128 linearComponentB = _mm_mul_ps((c.m_contactNormal).mVec128,body2.internalGetInvMass().mVec128);
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__m128 impulseMagnitude = deltaImpulse;
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body1.internalGetDeltaLinearVelocity().mVec128 = _mm_add_ps(body1.internalGetDeltaLinearVelocity().mVec128,_mm_mul_ps(linearComponentA,impulseMagnitude));
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body1.internalGetDeltaAngularVelocity().mVec128 = _mm_add_ps(body1.internalGetDeltaAngularVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentA.mVec128,impulseMagnitude));
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body2.internalGetDeltaLinearVelocity().mVec128 = _mm_sub_ps(body2.internalGetDeltaLinearVelocity().mVec128,_mm_mul_ps(linearComponentB,impulseMagnitude));
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body2.internalGetDeltaAngularVelocity().mVec128 = _mm_add_ps(body2.internalGetDeltaAngularVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentB.mVec128,impulseMagnitude));
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#else
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resolveSingleConstraintRowGeneric(body1,body2,c);
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#endif
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}
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// Project Gauss Seidel or the equivalent Sequential Impulse
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void btPgsJacobiSolver::resolveSingleConstraintRowGeneric(btSolverBody& body1,btSolverBody& body2,const btSolverConstraint& c)
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{
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btScalar deltaImpulse = c.m_rhs-btScalar(c.m_appliedImpulse)*c.m_cfm;
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const btScalar deltaVel1Dotn = c.m_contactNormal.dot(body1.internalGetDeltaLinearVelocity()) + c.m_relpos1CrossNormal.dot(body1.internalGetDeltaAngularVelocity());
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const btScalar deltaVel2Dotn = -c.m_contactNormal.dot(body2.internalGetDeltaLinearVelocity()) + c.m_relpos2CrossNormal.dot(body2.internalGetDeltaAngularVelocity());
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// const btScalar delta_rel_vel = deltaVel1Dotn-deltaVel2Dotn;
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deltaImpulse -= deltaVel1Dotn*c.m_jacDiagABInv;
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deltaImpulse -= deltaVel2Dotn*c.m_jacDiagABInv;
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const btScalar sum = btScalar(c.m_appliedImpulse) + deltaImpulse;
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if (sum < c.m_lowerLimit)
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{
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deltaImpulse = c.m_lowerLimit-c.m_appliedImpulse;
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c.m_appliedImpulse = c.m_lowerLimit;
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}
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else if (sum > c.m_upperLimit)
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{
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deltaImpulse = c.m_upperLimit-c.m_appliedImpulse;
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c.m_appliedImpulse = c.m_upperLimit;
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}
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else
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{
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c.m_appliedImpulse = sum;
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}
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body1.internalApplyImpulse(c.m_contactNormal*body1.internalGetInvMass(),c.m_angularComponentA,deltaImpulse);
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body2.internalApplyImpulse(-c.m_contactNormal*body2.internalGetInvMass(),c.m_angularComponentB,deltaImpulse);
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}
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void btPgsJacobiSolver::resolveSingleConstraintRowLowerLimitSIMD(btSolverBody& body1,btSolverBody& body2,const btSolverConstraint& c)
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{
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#ifdef USE_SIMD
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__m128 cpAppliedImp = _mm_set1_ps(c.m_appliedImpulse);
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__m128 lowerLimit1 = _mm_set1_ps(c.m_lowerLimit);
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__m128 upperLimit1 = _mm_set1_ps(c.m_upperLimit);
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__m128 deltaImpulse = _mm_sub_ps(_mm_set1_ps(c.m_rhs), _mm_mul_ps(_mm_set1_ps(c.m_appliedImpulse),_mm_set1_ps(c.m_cfm)));
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__m128 deltaVel1Dotn = _mm_add_ps(btSimdDot3(c.m_contactNormal.mVec128,body1.internalGetDeltaLinearVelocity().mVec128), btSimdDot3(c.m_relpos1CrossNormal.mVec128,body1.internalGetDeltaAngularVelocity().mVec128));
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__m128 deltaVel2Dotn = _mm_sub_ps(btSimdDot3(c.m_relpos2CrossNormal.mVec128,body2.internalGetDeltaAngularVelocity().mVec128),btSimdDot3((c.m_contactNormal).mVec128,body2.internalGetDeltaLinearVelocity().mVec128));
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deltaImpulse = _mm_sub_ps(deltaImpulse,_mm_mul_ps(deltaVel1Dotn,_mm_set1_ps(c.m_jacDiagABInv)));
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deltaImpulse = _mm_sub_ps(deltaImpulse,_mm_mul_ps(deltaVel2Dotn,_mm_set1_ps(c.m_jacDiagABInv)));
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btSimdScalar sum = _mm_add_ps(cpAppliedImp,deltaImpulse);
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btSimdScalar resultLowerLess,resultUpperLess;
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resultLowerLess = _mm_cmplt_ps(sum,lowerLimit1);
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resultUpperLess = _mm_cmplt_ps(sum,upperLimit1);
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__m128 lowMinApplied = _mm_sub_ps(lowerLimit1,cpAppliedImp);
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deltaImpulse = _mm_or_ps( _mm_and_ps(resultLowerLess, lowMinApplied), _mm_andnot_ps(resultLowerLess, deltaImpulse) );
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c.m_appliedImpulse = _mm_or_ps( _mm_and_ps(resultLowerLess, lowerLimit1), _mm_andnot_ps(resultLowerLess, sum) );
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__m128 linearComponentA = _mm_mul_ps(c.m_contactNormal.mVec128,body1.internalGetInvMass().mVec128);
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__m128 linearComponentB = _mm_mul_ps((c.m_contactNormal).mVec128,body2.internalGetInvMass().mVec128);
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__m128 impulseMagnitude = deltaImpulse;
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body1.internalGetDeltaLinearVelocity().mVec128 = _mm_add_ps(body1.internalGetDeltaLinearVelocity().mVec128,_mm_mul_ps(linearComponentA,impulseMagnitude));
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body1.internalGetDeltaAngularVelocity().mVec128 = _mm_add_ps(body1.internalGetDeltaAngularVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentA.mVec128,impulseMagnitude));
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body2.internalGetDeltaLinearVelocity().mVec128 = _mm_sub_ps(body2.internalGetDeltaLinearVelocity().mVec128,_mm_mul_ps(linearComponentB,impulseMagnitude));
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body2.internalGetDeltaAngularVelocity().mVec128 = _mm_add_ps(body2.internalGetDeltaAngularVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentB.mVec128,impulseMagnitude));
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#else
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resolveSingleConstraintRowLowerLimit(body1,body2,c);
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#endif
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}
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// Project Gauss Seidel or the equivalent Sequential Impulse
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void btPgsJacobiSolver::resolveSingleConstraintRowLowerLimit(btSolverBody& body1,btSolverBody& body2,const btSolverConstraint& c)
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{
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btScalar deltaImpulse = c.m_rhs-btScalar(c.m_appliedImpulse)*c.m_cfm;
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const btScalar deltaVel1Dotn = c.m_contactNormal.dot(body1.internalGetDeltaLinearVelocity()) + c.m_relpos1CrossNormal.dot(body1.internalGetDeltaAngularVelocity());
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const btScalar deltaVel2Dotn = -c.m_contactNormal.dot(body2.internalGetDeltaLinearVelocity()) + c.m_relpos2CrossNormal.dot(body2.internalGetDeltaAngularVelocity());
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deltaImpulse -= deltaVel1Dotn*c.m_jacDiagABInv;
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deltaImpulse -= deltaVel2Dotn*c.m_jacDiagABInv;
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const btScalar sum = btScalar(c.m_appliedImpulse) + deltaImpulse;
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if (sum < c.m_lowerLimit)
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{
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deltaImpulse = c.m_lowerLimit-c.m_appliedImpulse;
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c.m_appliedImpulse = c.m_lowerLimit;
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}
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else
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{
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c.m_appliedImpulse = sum;
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}
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body1.internalApplyImpulse(c.m_contactNormal*body1.internalGetInvMass(),c.m_angularComponentA,deltaImpulse);
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body2.internalApplyImpulse(-c.m_contactNormal*body2.internalGetInvMass(),c.m_angularComponentB,deltaImpulse);
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}
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void btPgsJacobiSolver::resolveSplitPenetrationImpulseCacheFriendly(
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btSolverBody& body1,
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btSolverBody& body2,
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const btSolverConstraint& c)
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{
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if (c.m_rhsPenetration)
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{
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gNumSplitImpulseRecoveries2++;
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btScalar deltaImpulse = c.m_rhsPenetration-btScalar(c.m_appliedPushImpulse)*c.m_cfm;
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const btScalar deltaVel1Dotn = c.m_contactNormal.dot(body1.internalGetPushVelocity()) + c.m_relpos1CrossNormal.dot(body1.internalGetTurnVelocity());
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const btScalar deltaVel2Dotn = -c.m_contactNormal.dot(body2.internalGetPushVelocity()) + c.m_relpos2CrossNormal.dot(body2.internalGetTurnVelocity());
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deltaImpulse -= deltaVel1Dotn*c.m_jacDiagABInv;
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deltaImpulse -= deltaVel2Dotn*c.m_jacDiagABInv;
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const btScalar sum = btScalar(c.m_appliedPushImpulse) + deltaImpulse;
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if (sum < c.m_lowerLimit)
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{
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deltaImpulse = c.m_lowerLimit-c.m_appliedPushImpulse;
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c.m_appliedPushImpulse = c.m_lowerLimit;
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}
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else
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{
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c.m_appliedPushImpulse = sum;
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}
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body1.internalApplyPushImpulse(c.m_contactNormal*body1.internalGetInvMass(),c.m_angularComponentA,deltaImpulse);
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body2.internalApplyPushImpulse(-c.m_contactNormal*body2.internalGetInvMass(),c.m_angularComponentB,deltaImpulse);
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}
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}
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|
|
|
void btPgsJacobiSolver::resolveSplitPenetrationSIMD(btSolverBody& body1,btSolverBody& body2,const btSolverConstraint& c)
|
|
{
|
|
#ifdef USE_SIMD
|
|
if (!c.m_rhsPenetration)
|
|
return;
|
|
|
|
gNumSplitImpulseRecoveries2++;
|
|
|
|
__m128 cpAppliedImp = _mm_set1_ps(c.m_appliedPushImpulse);
|
|
__m128 lowerLimit1 = _mm_set1_ps(c.m_lowerLimit);
|
|
__m128 upperLimit1 = _mm_set1_ps(c.m_upperLimit);
|
|
__m128 deltaImpulse = _mm_sub_ps(_mm_set1_ps(c.m_rhsPenetration), _mm_mul_ps(_mm_set1_ps(c.m_appliedPushImpulse),_mm_set1_ps(c.m_cfm)));
|
|
__m128 deltaVel1Dotn = _mm_add_ps(btSimdDot3(c.m_contactNormal.mVec128,body1.internalGetPushVelocity().mVec128), btSimdDot3(c.m_relpos1CrossNormal.mVec128,body1.internalGetTurnVelocity().mVec128));
|
|
__m128 deltaVel2Dotn = _mm_sub_ps(btSimdDot3(c.m_relpos2CrossNormal.mVec128,body2.internalGetTurnVelocity().mVec128),btSimdDot3((c.m_contactNormal).mVec128,body2.internalGetPushVelocity().mVec128));
|
|
deltaImpulse = _mm_sub_ps(deltaImpulse,_mm_mul_ps(deltaVel1Dotn,_mm_set1_ps(c.m_jacDiagABInv)));
|
|
deltaImpulse = _mm_sub_ps(deltaImpulse,_mm_mul_ps(deltaVel2Dotn,_mm_set1_ps(c.m_jacDiagABInv)));
|
|
btSimdScalar sum = _mm_add_ps(cpAppliedImp,deltaImpulse);
|
|
btSimdScalar resultLowerLess,resultUpperLess;
|
|
resultLowerLess = _mm_cmplt_ps(sum,lowerLimit1);
|
|
resultUpperLess = _mm_cmplt_ps(sum,upperLimit1);
|
|
__m128 lowMinApplied = _mm_sub_ps(lowerLimit1,cpAppliedImp);
|
|
deltaImpulse = _mm_or_ps( _mm_and_ps(resultLowerLess, lowMinApplied), _mm_andnot_ps(resultLowerLess, deltaImpulse) );
|
|
c.m_appliedPushImpulse = _mm_or_ps( _mm_and_ps(resultLowerLess, lowerLimit1), _mm_andnot_ps(resultLowerLess, sum) );
|
|
__m128 linearComponentA = _mm_mul_ps(c.m_contactNormal.mVec128,body1.internalGetInvMass().mVec128);
|
|
__m128 linearComponentB = _mm_mul_ps((c.m_contactNormal).mVec128,body2.internalGetInvMass().mVec128);
|
|
__m128 impulseMagnitude = deltaImpulse;
|
|
body1.internalGetPushVelocity().mVec128 = _mm_add_ps(body1.internalGetPushVelocity().mVec128,_mm_mul_ps(linearComponentA,impulseMagnitude));
|
|
body1.internalGetTurnVelocity().mVec128 = _mm_add_ps(body1.internalGetTurnVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentA.mVec128,impulseMagnitude));
|
|
body2.internalGetPushVelocity().mVec128 = _mm_sub_ps(body2.internalGetPushVelocity().mVec128,_mm_mul_ps(linearComponentB,impulseMagnitude));
|
|
body2.internalGetTurnVelocity().mVec128 = _mm_add_ps(body2.internalGetTurnVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentB.mVec128,impulseMagnitude));
|
|
#else
|
|
resolveSplitPenetrationImpulseCacheFriendly(body1,body2,c);
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
unsigned long btPgsJacobiSolver::btRand2()
|
|
{
|
|
m_btSeed2 = (1664525L*m_btSeed2 + 1013904223L) & 0xffffffff;
|
|
return m_btSeed2;
|
|
}
|
|
|
|
|
|
|
|
//See ODE: adam's all-int straightforward(?) dRandInt (0..n-1)
|
|
int btPgsJacobiSolver::btRandInt2 (int n)
|
|
{
|
|
// seems good; xor-fold and modulus
|
|
const unsigned long un = static_cast<unsigned long>(n);
|
|
unsigned long r = btRand2();
|
|
|
|
// note: probably more aggressive than it needs to be -- might be
|
|
// able to get away without one or two of the innermost branches.
|
|
if (un <= 0x00010000UL) {
|
|
r ^= (r >> 16);
|
|
if (un <= 0x00000100UL) {
|
|
r ^= (r >> 8);
|
|
if (un <= 0x00000010UL) {
|
|
r ^= (r >> 4);
|
|
if (un <= 0x00000004UL) {
|
|
r ^= (r >> 2);
|
|
if (un <= 0x00000002UL) {
|
|
r ^= (r >> 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return (int) (r % un);
|
|
}
|
|
|
|
|
|
|
|
void btPgsJacobiSolver::initSolverBody(int bodyIndex, btSolverBody* solverBody, btRigidBodyCL* rb)
|
|
{
|
|
|
|
solverBody->m_deltaLinearVelocity.setValue(0.f,0.f,0.f);
|
|
solverBody->m_deltaAngularVelocity.setValue(0.f,0.f,0.f);
|
|
solverBody->internalGetPushVelocity().setValue(0.f,0.f,0.f);
|
|
solverBody->internalGetTurnVelocity().setValue(0.f,0.f,0.f);
|
|
|
|
if (rb)
|
|
{
|
|
solverBody->m_worldTransform = getWorldTransform(rb);
|
|
solverBody->internalSetInvMass(btVector3(rb->getInvMass(),rb->getInvMass(),rb->getInvMass()));
|
|
solverBody->m_originalBodyIndex = bodyIndex;
|
|
solverBody->m_angularFactor = btVector3(1,1,1);
|
|
solverBody->m_linearFactor = btVector3(1,1,1);
|
|
solverBody->m_linearVelocity = getLinearVelocity(rb);
|
|
solverBody->m_angularVelocity = getAngularVelocity(rb);
|
|
} else
|
|
{
|
|
solverBody->m_worldTransform.setIdentity();
|
|
solverBody->internalSetInvMass(btVector3(0,0,0));
|
|
solverBody->m_originalBodyIndex = bodyIndex;
|
|
solverBody->m_angularFactor.setValue(1,1,1);
|
|
solverBody->m_linearFactor.setValue(1,1,1);
|
|
solverBody->m_linearVelocity.setValue(0,0,0);
|
|
solverBody->m_angularVelocity.setValue(0,0,0);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
btScalar btPgsJacobiSolver::restitutionCurve(btScalar rel_vel, btScalar restitution)
|
|
{
|
|
btScalar rest = restitution * -rel_vel;
|
|
return rest;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void btPgsJacobiSolver::setupFrictionConstraint(btRigidBodyCL* bodies,btInertiaCL* inertias, btSolverConstraint& solverConstraint, const btVector3& normalAxis,int solverBodyIdA,int solverBodyIdB,btContactPoint& cp,const btVector3& rel_pos1,const btVector3& rel_pos2,btRigidBodyCL* colObj0,btRigidBodyCL* colObj1, btScalar relaxation, btScalar desiredVelocity, btScalar cfmSlip)
|
|
{
|
|
|
|
|
|
solverConstraint.m_contactNormal = normalAxis;
|
|
btSolverBody& solverBodyA = m_tmpSolverBodyPool[solverBodyIdA];
|
|
btSolverBody& solverBodyB = m_tmpSolverBodyPool[solverBodyIdB];
|
|
|
|
btRigidBodyCL* body0 = &bodies[solverBodyA.m_originalBodyIndex];
|
|
btRigidBodyCL* body1 = &bodies[solverBodyB.m_originalBodyIndex];
|
|
|
|
|
|
solverConstraint.m_solverBodyIdA = solverBodyIdA;
|
|
solverConstraint.m_solverBodyIdB = solverBodyIdB;
|
|
|
|
solverConstraint.m_friction = cp.m_combinedFriction;
|
|
solverConstraint.m_originalContactPoint = 0;
|
|
|
|
solverConstraint.m_appliedImpulse = 0.f;
|
|
solverConstraint.m_appliedPushImpulse = 0.f;
|
|
|
|
{
|
|
btVector3 ftorqueAxis1 = rel_pos1.cross(solverConstraint.m_contactNormal);
|
|
solverConstraint.m_relpos1CrossNormal = ftorqueAxis1;
|
|
solverConstraint.m_angularComponentA = body0 ? getInvInertiaTensorWorld(&inertias[solverBodyA.m_originalBodyIndex])*ftorqueAxis1 : btVector3(0,0,0);
|
|
}
|
|
{
|
|
btVector3 ftorqueAxis1 = rel_pos2.cross(-solverConstraint.m_contactNormal);
|
|
solverConstraint.m_relpos2CrossNormal = ftorqueAxis1;
|
|
solverConstraint.m_angularComponentB = body1 ? getInvInertiaTensorWorld(&inertias[solverBodyB.m_originalBodyIndex])*ftorqueAxis1 : btVector3(0,0,0);
|
|
}
|
|
|
|
btScalar scaledDenom;
|
|
|
|
{
|
|
btVector3 vec;
|
|
btScalar denom0 = 0.f;
|
|
btScalar denom1 = 0.f;
|
|
if (body0)
|
|
{
|
|
vec = ( solverConstraint.m_angularComponentA).cross(rel_pos1);
|
|
denom0 = body0->getInvMass() + normalAxis.dot(vec);
|
|
}
|
|
if (body1)
|
|
{
|
|
vec = ( -solverConstraint.m_angularComponentB).cross(rel_pos2);
|
|
denom1 = body1->getInvMass() + normalAxis.dot(vec);
|
|
}
|
|
|
|
btScalar denom;
|
|
if (m_usePgs)
|
|
{
|
|
scaledDenom = denom = relaxation/(denom0+denom1);
|
|
} else
|
|
{
|
|
denom = relaxation/(denom0+denom1);
|
|
btScalar countA = body0->getInvMass() ? btScalar(m_bodyCount[solverBodyA.m_originalBodyIndex]): 1.f;
|
|
btScalar countB = body1->getInvMass() ? btScalar(m_bodyCount[solverBodyB.m_originalBodyIndex]): 1.f;
|
|
|
|
scaledDenom = relaxation/(denom0*countA+denom1*countB);
|
|
}
|
|
|
|
solverConstraint.m_jacDiagABInv = denom;
|
|
}
|
|
|
|
{
|
|
|
|
|
|
btScalar rel_vel;
|
|
btScalar vel1Dotn = solverConstraint.m_contactNormal.dot(body0?solverBodyA.m_linearVelocity:btVector3(0,0,0))
|
|
+ solverConstraint.m_relpos1CrossNormal.dot(body0?solverBodyA.m_angularVelocity:btVector3(0,0,0));
|
|
btScalar vel2Dotn = -solverConstraint.m_contactNormal.dot(body1?solverBodyB.m_linearVelocity:btVector3(0,0,0))
|
|
+ solverConstraint.m_relpos2CrossNormal.dot(body1?solverBodyB.m_angularVelocity:btVector3(0,0,0));
|
|
|
|
rel_vel = vel1Dotn+vel2Dotn;
|
|
|
|
// btScalar positionalError = 0.f;
|
|
|
|
btSimdScalar velocityError = desiredVelocity - rel_vel;
|
|
btSimdScalar velocityImpulse = velocityError * btSimdScalar(scaledDenom);//solverConstraint.m_jacDiagABInv);
|
|
solverConstraint.m_rhs = velocityImpulse;
|
|
solverConstraint.m_cfm = cfmSlip;
|
|
solverConstraint.m_lowerLimit = 0;
|
|
solverConstraint.m_upperLimit = 1e10f;
|
|
|
|
}
|
|
}
|
|
|
|
btSolverConstraint& btPgsJacobiSolver::addFrictionConstraint(btRigidBodyCL* bodies,btInertiaCL* inertias, const btVector3& normalAxis,int solverBodyIdA,int solverBodyIdB,int frictionIndex,btContactPoint& cp,const btVector3& rel_pos1,const btVector3& rel_pos2,btRigidBodyCL* colObj0,btRigidBodyCL* colObj1, btScalar relaxation, btScalar desiredVelocity, btScalar cfmSlip)
|
|
{
|
|
btSolverConstraint& solverConstraint = m_tmpSolverContactFrictionConstraintPool.expandNonInitializing();
|
|
solverConstraint.m_frictionIndex = frictionIndex;
|
|
setupFrictionConstraint(bodies,inertias,solverConstraint, normalAxis, solverBodyIdA, solverBodyIdB, cp, rel_pos1, rel_pos2,
|
|
colObj0, colObj1, relaxation, desiredVelocity, cfmSlip);
|
|
return solverConstraint;
|
|
}
|
|
|
|
|
|
void btPgsJacobiSolver::setupRollingFrictionConstraint(btRigidBodyCL* bodies,btInertiaCL* inertias, btSolverConstraint& solverConstraint, const btVector3& normalAxis1,int solverBodyIdA,int solverBodyIdB,
|
|
btContactPoint& cp,const btVector3& rel_pos1,const btVector3& rel_pos2,
|
|
btRigidBodyCL* colObj0,btRigidBodyCL* colObj1, btScalar relaxation,
|
|
btScalar desiredVelocity, btScalar cfmSlip)
|
|
|
|
{
|
|
btVector3 normalAxis(0,0,0);
|
|
|
|
|
|
solverConstraint.m_contactNormal = normalAxis;
|
|
btSolverBody& solverBodyA = m_tmpSolverBodyPool[solverBodyIdA];
|
|
btSolverBody& solverBodyB = m_tmpSolverBodyPool[solverBodyIdB];
|
|
|
|
btRigidBodyCL* body0 = &bodies[m_tmpSolverBodyPool[solverBodyIdA].m_originalBodyIndex];
|
|
btRigidBodyCL* body1 = &bodies[m_tmpSolverBodyPool[solverBodyIdB].m_originalBodyIndex];
|
|
|
|
solverConstraint.m_solverBodyIdA = solverBodyIdA;
|
|
solverConstraint.m_solverBodyIdB = solverBodyIdB;
|
|
|
|
solverConstraint.m_friction = cp.m_combinedRollingFriction;
|
|
solverConstraint.m_originalContactPoint = 0;
|
|
|
|
solverConstraint.m_appliedImpulse = 0.f;
|
|
solverConstraint.m_appliedPushImpulse = 0.f;
|
|
|
|
{
|
|
btVector3 ftorqueAxis1 = -normalAxis1;
|
|
solverConstraint.m_relpos1CrossNormal = ftorqueAxis1;
|
|
solverConstraint.m_angularComponentA = body0 ? getInvInertiaTensorWorld(&inertias[solverBodyA.m_originalBodyIndex])*ftorqueAxis1 : btVector3(0,0,0);
|
|
}
|
|
{
|
|
btVector3 ftorqueAxis1 = normalAxis1;
|
|
solverConstraint.m_relpos2CrossNormal = ftorqueAxis1;
|
|
solverConstraint.m_angularComponentB = body1 ? getInvInertiaTensorWorld(&inertias[solverBodyB.m_originalBodyIndex])*ftorqueAxis1 : btVector3(0,0,0);
|
|
}
|
|
|
|
|
|
{
|
|
btVector3 iMJaA = body0?getInvInertiaTensorWorld(&inertias[solverBodyA.m_originalBodyIndex])*solverConstraint.m_relpos1CrossNormal:btVector3(0,0,0);
|
|
btVector3 iMJaB = body1?getInvInertiaTensorWorld(&inertias[solverBodyB.m_originalBodyIndex])*solverConstraint.m_relpos2CrossNormal:btVector3(0,0,0);
|
|
btScalar sum = 0;
|
|
sum += iMJaA.dot(solverConstraint.m_relpos1CrossNormal);
|
|
sum += iMJaB.dot(solverConstraint.m_relpos2CrossNormal);
|
|
solverConstraint.m_jacDiagABInv = btScalar(1.)/sum;
|
|
}
|
|
|
|
{
|
|
|
|
|
|
btScalar rel_vel;
|
|
btScalar vel1Dotn = solverConstraint.m_contactNormal.dot(body0?solverBodyA.m_linearVelocity:btVector3(0,0,0))
|
|
+ solverConstraint.m_relpos1CrossNormal.dot(body0?solverBodyA.m_angularVelocity:btVector3(0,0,0));
|
|
btScalar vel2Dotn = -solverConstraint.m_contactNormal.dot(body1?solverBodyB.m_linearVelocity:btVector3(0,0,0))
|
|
+ solverConstraint.m_relpos2CrossNormal.dot(body1?solverBodyB.m_angularVelocity:btVector3(0,0,0));
|
|
|
|
rel_vel = vel1Dotn+vel2Dotn;
|
|
|
|
// btScalar positionalError = 0.f;
|
|
|
|
btSimdScalar velocityError = desiredVelocity - rel_vel;
|
|
btSimdScalar velocityImpulse = velocityError * btSimdScalar(solverConstraint.m_jacDiagABInv);
|
|
solverConstraint.m_rhs = velocityImpulse;
|
|
solverConstraint.m_cfm = cfmSlip;
|
|
solverConstraint.m_lowerLimit = 0;
|
|
solverConstraint.m_upperLimit = 1e10f;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
btSolverConstraint& btPgsJacobiSolver::addRollingFrictionConstraint(btRigidBodyCL* bodies,btInertiaCL* inertias,const btVector3& normalAxis,int solverBodyIdA,int solverBodyIdB,int frictionIndex,btContactPoint& cp,const btVector3& rel_pos1,const btVector3& rel_pos2,btRigidBodyCL* colObj0,btRigidBodyCL* colObj1, btScalar relaxation, btScalar desiredVelocity, btScalar cfmSlip)
|
|
{
|
|
btSolverConstraint& solverConstraint = m_tmpSolverContactRollingFrictionConstraintPool.expandNonInitializing();
|
|
solverConstraint.m_frictionIndex = frictionIndex;
|
|
setupRollingFrictionConstraint(bodies,inertias,solverConstraint, normalAxis, solverBodyIdA, solverBodyIdB, cp, rel_pos1, rel_pos2,
|
|
colObj0, colObj1, relaxation, desiredVelocity, cfmSlip);
|
|
return solverConstraint;
|
|
}
|
|
|
|
|
|
int btPgsJacobiSolver::getOrInitSolverBody(int bodyIndex, btRigidBodyCL* bodies,btInertiaCL* inertias)
|
|
{
|
|
//btAssert(bodyIndex< m_tmpSolverBodyPool.size());
|
|
|
|
btRigidBodyCL& body = bodies[bodyIndex];
|
|
int curIndex = -1;
|
|
if (m_usePgs || body.getInvMass()==0.f)
|
|
{
|
|
if (m_bodyCount[bodyIndex]<0)
|
|
{
|
|
curIndex = m_tmpSolverBodyPool.size();
|
|
btSolverBody& solverBody = m_tmpSolverBodyPool.expand();
|
|
initSolverBody(bodyIndex,&solverBody,&body);
|
|
solverBody.m_originalBodyIndex = bodyIndex;
|
|
m_bodyCount[bodyIndex] = curIndex;
|
|
} else
|
|
{
|
|
curIndex = m_bodyCount[bodyIndex];
|
|
}
|
|
} else
|
|
{
|
|
btAssert(m_bodyCount[bodyIndex]>0);
|
|
m_bodyCountCheck[bodyIndex]++;
|
|
curIndex = m_tmpSolverBodyPool.size();
|
|
btSolverBody& solverBody = m_tmpSolverBodyPool.expand();
|
|
initSolverBody(bodyIndex,&solverBody,&body);
|
|
solverBody.m_originalBodyIndex = bodyIndex;
|
|
}
|
|
|
|
btAssert(curIndex>=0);
|
|
return curIndex;
|
|
|
|
}
|
|
#include <stdio.h>
|
|
|
|
|
|
void btPgsJacobiSolver::setupContactConstraint(btRigidBodyCL* bodies, btInertiaCL* inertias,btSolverConstraint& solverConstraint,
|
|
int solverBodyIdA, int solverBodyIdB,
|
|
btContactPoint& cp, const btContactSolverInfo& infoGlobal,
|
|
btVector3& vel, btScalar& rel_vel, btScalar& relaxation,
|
|
btVector3& rel_pos1, btVector3& rel_pos2)
|
|
{
|
|
|
|
const btVector3& pos1 = cp.getPositionWorldOnA();
|
|
const btVector3& pos2 = cp.getPositionWorldOnB();
|
|
|
|
btSolverBody* bodyA = &m_tmpSolverBodyPool[solverBodyIdA];
|
|
btSolverBody* bodyB = &m_tmpSolverBodyPool[solverBodyIdB];
|
|
|
|
btRigidBodyCL* rb0 = &bodies[bodyA->m_originalBodyIndex];
|
|
btRigidBodyCL* rb1 = &bodies[bodyB->m_originalBodyIndex];
|
|
|
|
// btVector3 rel_pos1 = pos1 - colObj0->getWorldTransform().getOrigin();
|
|
// btVector3 rel_pos2 = pos2 - colObj1->getWorldTransform().getOrigin();
|
|
rel_pos1 = pos1 - bodyA->getWorldTransform().getOrigin();
|
|
rel_pos2 = pos2 - bodyB->getWorldTransform().getOrigin();
|
|
|
|
relaxation = 1.f;
|
|
|
|
btVector3 torqueAxis0 = rel_pos1.cross(cp.m_normalWorldOnB);
|
|
solverConstraint.m_angularComponentA = rb0 ? getInvInertiaTensorWorld(&inertias[bodyA->m_originalBodyIndex])*torqueAxis0 : btVector3(0,0,0);
|
|
btVector3 torqueAxis1 = rel_pos2.cross(cp.m_normalWorldOnB);
|
|
solverConstraint.m_angularComponentB = rb1 ? getInvInertiaTensorWorld(&inertias[bodyB->m_originalBodyIndex])*-torqueAxis1 : btVector3(0,0,0);
|
|
|
|
btScalar scaledDenom;
|
|
{
|
|
#ifdef COMPUTE_IMPULSE_DENOM
|
|
btScalar denom0 = rb0->computeImpulseDenominator(pos1,cp.m_normalWorldOnB);
|
|
btScalar denom1 = rb1->computeImpulseDenominator(pos2,cp.m_normalWorldOnB);
|
|
#else
|
|
btVector3 vec;
|
|
btScalar denom0 = 0.f;
|
|
btScalar denom1 = 0.f;
|
|
if (rb0)
|
|
{
|
|
vec = ( solverConstraint.m_angularComponentA).cross(rel_pos1);
|
|
denom0 = rb0->getInvMass() + cp.m_normalWorldOnB.dot(vec);
|
|
}
|
|
if (rb1)
|
|
{
|
|
vec = ( -solverConstraint.m_angularComponentB).cross(rel_pos2);
|
|
denom1 = rb1->getInvMass() + cp.m_normalWorldOnB.dot(vec);
|
|
}
|
|
#endif //COMPUTE_IMPULSE_DENOM
|
|
|
|
|
|
btScalar denom;
|
|
if (m_usePgs)
|
|
{
|
|
scaledDenom = denom = relaxation/(denom0+denom1);
|
|
} else
|
|
{
|
|
denom = relaxation/(denom0+denom1);
|
|
|
|
btScalar countA = rb0->m_invMass? btScalar(m_bodyCount[bodyA->m_originalBodyIndex]) : 1.f;
|
|
btScalar countB = rb1->m_invMass? btScalar(m_bodyCount[bodyB->m_originalBodyIndex]) : 1.f;
|
|
scaledDenom = relaxation/(denom0*countA+denom1*countB);
|
|
}
|
|
solverConstraint.m_jacDiagABInv = denom;
|
|
}
|
|
|
|
solverConstraint.m_contactNormal = cp.m_normalWorldOnB;
|
|
solverConstraint.m_relpos1CrossNormal = torqueAxis0;
|
|
solverConstraint.m_relpos2CrossNormal = -torqueAxis1;
|
|
|
|
btScalar restitution = 0.f;
|
|
btScalar penetration = cp.getDistance()+infoGlobal.m_linearSlop;
|
|
|
|
{
|
|
btVector3 vel1,vel2;
|
|
|
|
vel1 = rb0? getVelocityInLocalPoint(rb0,rel_pos1) : btVector3(0,0,0);
|
|
vel2 = rb1? getVelocityInLocalPoint(rb1, rel_pos2) : btVector3(0,0,0);
|
|
|
|
// btVector3 vel2 = rb1 ? rb1->getVelocityInLocalPoint(rel_pos2) : btVector3(0,0,0);
|
|
vel = vel1 - vel2;
|
|
rel_vel = cp.m_normalWorldOnB.dot(vel);
|
|
|
|
|
|
|
|
solverConstraint.m_friction = cp.m_combinedFriction;
|
|
|
|
|
|
restitution = restitutionCurve(rel_vel, cp.m_combinedRestitution);
|
|
if (restitution <= btScalar(0.))
|
|
{
|
|
restitution = 0.f;
|
|
};
|
|
}
|
|
|
|
|
|
///warm starting (or zero if disabled)
|
|
if (infoGlobal.m_solverMode & SOLVER_USE_WARMSTARTING)
|
|
{
|
|
solverConstraint.m_appliedImpulse = cp.m_appliedImpulse * infoGlobal.m_warmstartingFactor;
|
|
if (rb0)
|
|
bodyA->internalApplyImpulse(solverConstraint.m_contactNormal*bodyA->internalGetInvMass(),solverConstraint.m_angularComponentA,solverConstraint.m_appliedImpulse);
|
|
if (rb1)
|
|
bodyB->internalApplyImpulse(solverConstraint.m_contactNormal*bodyB->internalGetInvMass(),-solverConstraint.m_angularComponentB,-(btScalar)solverConstraint.m_appliedImpulse);
|
|
} else
|
|
{
|
|
solverConstraint.m_appliedImpulse = 0.f;
|
|
}
|
|
|
|
solverConstraint.m_appliedPushImpulse = 0.f;
|
|
|
|
{
|
|
btScalar vel1Dotn = solverConstraint.m_contactNormal.dot(rb0?bodyA->m_linearVelocity:btVector3(0,0,0))
|
|
+ solverConstraint.m_relpos1CrossNormal.dot(rb0?bodyA->m_angularVelocity:btVector3(0,0,0));
|
|
btScalar vel2Dotn = -solverConstraint.m_contactNormal.dot(rb1?bodyB->m_linearVelocity:btVector3(0,0,0))
|
|
+ solverConstraint.m_relpos2CrossNormal.dot(rb1?bodyB->m_angularVelocity:btVector3(0,0,0));
|
|
btScalar rel_vel = vel1Dotn+vel2Dotn;
|
|
|
|
btScalar positionalError = 0.f;
|
|
btScalar velocityError = restitution - rel_vel;// * damping;
|
|
|
|
|
|
btScalar erp = infoGlobal.m_erp2;
|
|
if (!infoGlobal.m_splitImpulse || (penetration > infoGlobal.m_splitImpulsePenetrationThreshold))
|
|
{
|
|
erp = infoGlobal.m_erp;
|
|
}
|
|
|
|
if (penetration>0)
|
|
{
|
|
positionalError = 0;
|
|
|
|
velocityError -= penetration / infoGlobal.m_timeStep;
|
|
} else
|
|
{
|
|
positionalError = -penetration * erp/infoGlobal.m_timeStep;
|
|
}
|
|
|
|
btScalar penetrationImpulse = positionalError*scaledDenom;//solverConstraint.m_jacDiagABInv;
|
|
btScalar velocityImpulse = velocityError *scaledDenom;//solverConstraint.m_jacDiagABInv;
|
|
|
|
if (!infoGlobal.m_splitImpulse || (penetration > infoGlobal.m_splitImpulsePenetrationThreshold))
|
|
{
|
|
//combine position and velocity into rhs
|
|
solverConstraint.m_rhs = penetrationImpulse+velocityImpulse;
|
|
solverConstraint.m_rhsPenetration = 0.f;
|
|
|
|
} else
|
|
{
|
|
//split position and velocity into rhs and m_rhsPenetration
|
|
solverConstraint.m_rhs = velocityImpulse;
|
|
solverConstraint.m_rhsPenetration = penetrationImpulse;
|
|
}
|
|
solverConstraint.m_cfm = 0.f;
|
|
solverConstraint.m_lowerLimit = 0;
|
|
solverConstraint.m_upperLimit = 1e10f;
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
void btPgsJacobiSolver::setFrictionConstraintImpulse( btRigidBodyCL* bodies, btInertiaCL* inertias,btSolverConstraint& solverConstraint,
|
|
int solverBodyIdA, int solverBodyIdB,
|
|
btContactPoint& cp, const btContactSolverInfo& infoGlobal)
|
|
{
|
|
|
|
btSolverBody* bodyA = &m_tmpSolverBodyPool[solverBodyIdA];
|
|
btSolverBody* bodyB = &m_tmpSolverBodyPool[solverBodyIdB];
|
|
|
|
|
|
{
|
|
btSolverConstraint& frictionConstraint1 = m_tmpSolverContactFrictionConstraintPool[solverConstraint.m_frictionIndex];
|
|
if (infoGlobal.m_solverMode & SOLVER_USE_WARMSTARTING)
|
|
{
|
|
frictionConstraint1.m_appliedImpulse = cp.m_appliedImpulseLateral1 * infoGlobal.m_warmstartingFactor;
|
|
if (bodies[bodyA->m_originalBodyIndex].m_invMass)
|
|
bodyA->internalApplyImpulse(frictionConstraint1.m_contactNormal*bodies[bodyA->m_originalBodyIndex].m_invMass,frictionConstraint1.m_angularComponentA,frictionConstraint1.m_appliedImpulse);
|
|
if (bodies[bodyB->m_originalBodyIndex].m_invMass)
|
|
bodyB->internalApplyImpulse(frictionConstraint1.m_contactNormal*bodies[bodyB->m_originalBodyIndex].m_invMass,-frictionConstraint1.m_angularComponentB,-(btScalar)frictionConstraint1.m_appliedImpulse);
|
|
} else
|
|
{
|
|
frictionConstraint1.m_appliedImpulse = 0.f;
|
|
}
|
|
}
|
|
|
|
if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS))
|
|
{
|
|
btSolverConstraint& frictionConstraint2 = m_tmpSolverContactFrictionConstraintPool[solverConstraint.m_frictionIndex+1];
|
|
if (infoGlobal.m_solverMode & SOLVER_USE_WARMSTARTING)
|
|
{
|
|
frictionConstraint2.m_appliedImpulse = cp.m_appliedImpulseLateral2 * infoGlobal.m_warmstartingFactor;
|
|
if (bodies[bodyA->m_originalBodyIndex].m_invMass)
|
|
bodyA->internalApplyImpulse(frictionConstraint2.m_contactNormal*bodies[bodyA->m_originalBodyIndex].m_invMass,frictionConstraint2.m_angularComponentA,frictionConstraint2.m_appliedImpulse);
|
|
if (bodies[bodyB->m_originalBodyIndex].m_invMass)
|
|
bodyB->internalApplyImpulse(frictionConstraint2.m_contactNormal*bodies[bodyB->m_originalBodyIndex].m_invMass,-frictionConstraint2.m_angularComponentB,-(btScalar)frictionConstraint2.m_appliedImpulse);
|
|
} else
|
|
{
|
|
frictionConstraint2.m_appliedImpulse = 0.f;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
void btPgsJacobiSolver::convertContact(btRigidBodyCL* bodies, btInertiaCL* inertias,btContact4* manifold,const btContactSolverInfo& infoGlobal)
|
|
{
|
|
btRigidBodyCL* colObj0=0,*colObj1=0;
|
|
|
|
|
|
int solverBodyIdA = getOrInitSolverBody(manifold->getBodyA(),bodies,inertias);
|
|
int solverBodyIdB = getOrInitSolverBody(manifold->getBodyB(),bodies,inertias);
|
|
|
|
// btRigidBody* bodyA = btRigidBody::upcast(colObj0);
|
|
// btRigidBody* bodyB = btRigidBody::upcast(colObj1);
|
|
|
|
btSolverBody* solverBodyA = &m_tmpSolverBodyPool[solverBodyIdA];
|
|
btSolverBody* solverBodyB = &m_tmpSolverBodyPool[solverBodyIdB];
|
|
|
|
|
|
|
|
///avoid collision response between two static objects
|
|
if (solverBodyA->m_invMass.isZero() && solverBodyB->m_invMass.isZero())
|
|
return;
|
|
|
|
int rollingFriction=1;
|
|
int numContacts = getNumContacts(manifold);
|
|
for (int j=0;j<numContacts;j++)
|
|
{
|
|
|
|
btContactPoint cp;
|
|
getContactPoint(manifold,j,cp);
|
|
|
|
if (cp.getDistance() <= getContactProcessingThreshold(manifold))
|
|
{
|
|
btVector3 rel_pos1;
|
|
btVector3 rel_pos2;
|
|
btScalar relaxation;
|
|
btScalar rel_vel;
|
|
btVector3 vel;
|
|
|
|
int frictionIndex = m_tmpSolverContactConstraintPool.size();
|
|
btSolverConstraint& solverConstraint = m_tmpSolverContactConstraintPool.expandNonInitializing();
|
|
// btRigidBody* rb0 = btRigidBody::upcast(colObj0);
|
|
// btRigidBody* rb1 = btRigidBody::upcast(colObj1);
|
|
solverConstraint.m_solverBodyIdA = solverBodyIdA;
|
|
solverConstraint.m_solverBodyIdB = solverBodyIdB;
|
|
|
|
solverConstraint.m_originalContactPoint = &cp;
|
|
|
|
setupContactConstraint(bodies,inertias,solverConstraint, solverBodyIdA, solverBodyIdB, cp, infoGlobal, vel, rel_vel, relaxation, rel_pos1, rel_pos2);
|
|
|
|
// const btVector3& pos1 = cp.getPositionWorldOnA();
|
|
// const btVector3& pos2 = cp.getPositionWorldOnB();
|
|
|
|
/////setup the friction constraints
|
|
|
|
solverConstraint.m_frictionIndex = m_tmpSolverContactFrictionConstraintPool.size();
|
|
|
|
btVector3 angVelA,angVelB;
|
|
solverBodyA->getAngularVelocity(angVelA);
|
|
solverBodyB->getAngularVelocity(angVelB);
|
|
btVector3 relAngVel = angVelB-angVelA;
|
|
|
|
if ((cp.m_combinedRollingFriction>0.f) && (rollingFriction>0))
|
|
{
|
|
//only a single rollingFriction per manifold
|
|
rollingFriction--;
|
|
if (relAngVel.length()>infoGlobal.m_singleAxisRollingFrictionThreshold)
|
|
{
|
|
relAngVel.normalize();
|
|
if (relAngVel.length()>0.001)
|
|
addRollingFrictionConstraint(bodies,inertias,relAngVel,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
|
|
|
|
} else
|
|
{
|
|
addRollingFrictionConstraint(bodies,inertias,cp.m_normalWorldOnB,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
|
|
btVector3 axis0,axis1;
|
|
btPlaneSpace1(cp.m_normalWorldOnB,axis0,axis1);
|
|
if (axis0.length()>0.001)
|
|
addRollingFrictionConstraint(bodies,inertias,axis0,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
|
|
if (axis1.length()>0.001)
|
|
addRollingFrictionConstraint(bodies,inertias,axis1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
|
|
|
|
}
|
|
}
|
|
|
|
///Bullet has several options to set the friction directions
|
|
///By default, each contact has only a single friction direction that is recomputed automatically very frame
|
|
///based on the relative linear velocity.
|
|
///If the relative velocity it zero, it will automatically compute a friction direction.
|
|
|
|
///You can also enable two friction directions, using the SOLVER_USE_2_FRICTION_DIRECTIONS.
|
|
///In that case, the second friction direction will be orthogonal to both contact normal and first friction direction.
|
|
///
|
|
///If you choose SOLVER_DISABLE_VELOCITY_DEPENDENT_FRICTION_DIRECTION, then the friction will be independent from the relative projected velocity.
|
|
///
|
|
///The user can manually override the friction directions for certain contacts using a contact callback,
|
|
///and set the cp.m_lateralFrictionInitialized to true
|
|
///In that case, you can set the target relative motion in each friction direction (cp.m_contactMotion1 and cp.m_contactMotion2)
|
|
///this will give a conveyor belt effect
|
|
///
|
|
if (!(infoGlobal.m_solverMode & SOLVER_ENABLE_FRICTION_DIRECTION_CACHING) || !cp.m_lateralFrictionInitialized)
|
|
{
|
|
cp.m_lateralFrictionDir1 = vel - cp.m_normalWorldOnB * rel_vel;
|
|
btScalar lat_rel_vel = cp.m_lateralFrictionDir1.length2();
|
|
if (!(infoGlobal.m_solverMode & SOLVER_DISABLE_VELOCITY_DEPENDENT_FRICTION_DIRECTION) && lat_rel_vel > SIMD_EPSILON)
|
|
{
|
|
cp.m_lateralFrictionDir1 *= 1.f/btSqrt(lat_rel_vel);
|
|
if((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS))
|
|
{
|
|
cp.m_lateralFrictionDir2 = cp.m_lateralFrictionDir1.cross(cp.m_normalWorldOnB);
|
|
cp.m_lateralFrictionDir2.normalize();//??
|
|
addFrictionConstraint(bodies,inertias,cp.m_lateralFrictionDir2,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
|
|
|
|
}
|
|
|
|
addFrictionConstraint(bodies,inertias,cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
|
|
|
|
} else
|
|
{
|
|
btPlaneSpace1(cp.m_normalWorldOnB,cp.m_lateralFrictionDir1,cp.m_lateralFrictionDir2);
|
|
|
|
if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS))
|
|
{
|
|
addFrictionConstraint(bodies,inertias,cp.m_lateralFrictionDir2,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
|
|
}
|
|
|
|
addFrictionConstraint(bodies,inertias,cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
|
|
|
|
if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS) && (infoGlobal.m_solverMode & SOLVER_DISABLE_VELOCITY_DEPENDENT_FRICTION_DIRECTION))
|
|
{
|
|
cp.m_lateralFrictionInitialized = true;
|
|
}
|
|
}
|
|
|
|
} else
|
|
{
|
|
addFrictionConstraint(bodies,inertias,cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation,cp.m_contactMotion1, cp.m_contactCFM1);
|
|
|
|
if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS))
|
|
addFrictionConstraint(bodies,inertias,cp.m_lateralFrictionDir2,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation, cp.m_contactMotion2, cp.m_contactCFM2);
|
|
|
|
setFrictionConstraintImpulse( bodies,inertias,solverConstraint, solverBodyIdA, solverBodyIdB, cp, infoGlobal);
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
btScalar btPgsJacobiSolver::solveGroupCacheFriendlySetup(btRigidBodyCL* bodies, btInertiaCL* inertias, int numBodies, btContact4* manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal)
|
|
{
|
|
BT_PROFILE("solveGroupCacheFriendlySetup");
|
|
|
|
|
|
m_maxOverrideNumSolverIterations = 0;
|
|
|
|
|
|
|
|
m_tmpSolverBodyPool.resize(0);
|
|
|
|
|
|
m_bodyCount.resize(0);
|
|
m_bodyCount.resize(numBodies,0);
|
|
m_bodyCountCheck.resize(0);
|
|
m_bodyCountCheck.resize(numBodies,0);
|
|
|
|
m_deltaLinearVelocities.resize(0);
|
|
m_deltaLinearVelocities.resize(numBodies,btVector3(0,0,0));
|
|
m_deltaAngularVelocities.resize(0);
|
|
m_deltaAngularVelocities.resize(numBodies,btVector3(0,0,0));
|
|
|
|
int totalBodies = 0;
|
|
|
|
for (int i=0;i<numManifolds;i++)
|
|
{
|
|
int bodyIndexA = manifoldPtr[i].getBodyA();
|
|
int bodyIndexB = manifoldPtr[i].getBodyB();
|
|
if (m_usePgs)
|
|
{
|
|
m_bodyCount[bodyIndexA]=-1;
|
|
m_bodyCount[bodyIndexB]=-1;
|
|
} else
|
|
{
|
|
if (bodies[bodyIndexA].getInvMass())
|
|
{
|
|
//m_bodyCount[bodyIndexA]+=manifoldPtr[i].getNPoints();
|
|
m_bodyCount[bodyIndexA]++;
|
|
}
|
|
else
|
|
m_bodyCount[bodyIndexA]=-1;
|
|
|
|
if (bodies[bodyIndexB].getInvMass())
|
|
// m_bodyCount[bodyIndexB]+=manifoldPtr[i].getNPoints();
|
|
m_bodyCount[bodyIndexB]++;
|
|
else
|
|
m_bodyCount[bodyIndexB]=-1;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (1)
|
|
{
|
|
int j;
|
|
for (j=0;j<numConstraints;j++)
|
|
{
|
|
btTypedConstraint* constraint = constraints[j];
|
|
constraint->buildJacobian();
|
|
constraint->internalSetAppliedImpulse(0.0f);
|
|
}
|
|
}
|
|
|
|
//btRigidBody* rb0=0,*rb1=0;
|
|
//if (1)
|
|
{
|
|
{
|
|
|
|
int totalNumRows = 0;
|
|
int i;
|
|
|
|
m_tmpConstraintSizesPool.resizeNoInitialize(numConstraints);
|
|
//calculate the total number of contraint rows
|
|
for (i=0;i<numConstraints;i++)
|
|
{
|
|
btTypedConstraint::btConstraintInfo1& info1 = m_tmpConstraintSizesPool[i];
|
|
btJointFeedback* fb = constraints[i]->getJointFeedback();
|
|
if (fb)
|
|
{
|
|
fb->m_appliedForceBodyA.setZero();
|
|
fb->m_appliedTorqueBodyA.setZero();
|
|
fb->m_appliedForceBodyB.setZero();
|
|
fb->m_appliedTorqueBodyB.setZero();
|
|
}
|
|
|
|
if (constraints[i]->isEnabled())
|
|
{
|
|
}
|
|
if (constraints[i]->isEnabled())
|
|
{
|
|
constraints[i]->getInfo1(&info1);
|
|
} else
|
|
{
|
|
info1.m_numConstraintRows = 0;
|
|
info1.nub = 0;
|
|
}
|
|
totalNumRows += info1.m_numConstraintRows;
|
|
}
|
|
m_tmpSolverNonContactConstraintPool.resizeNoInitialize(totalNumRows);
|
|
|
|
|
|
#ifndef DISABLE_JOINTS
|
|
///setup the btSolverConstraints
|
|
int currentRow = 0;
|
|
|
|
for (i=0;i<numConstraints;i++)
|
|
{
|
|
const btTypedConstraint::btConstraintInfo1& info1 = m_tmpConstraintSizesPool[i];
|
|
|
|
if (info1.m_numConstraintRows)
|
|
{
|
|
btAssert(currentRow<totalNumRows);
|
|
|
|
btSolverConstraint* currentConstraintRow = &m_tmpSolverNonContactConstraintPool[currentRow];
|
|
btTypedConstraint* constraint = constraints[i];
|
|
btRigidBody& rbA = constraint->getRigidBodyA();
|
|
btRigidBody& rbB = constraint->getRigidBodyB();
|
|
|
|
int solverBodyIdA = getOrInitSolverBody(rbA);
|
|
int solverBodyIdB = getOrInitSolverBody(rbB);
|
|
|
|
btSolverBody* bodyAPtr = &m_tmpSolverBodyPool[solverBodyIdA];
|
|
btSolverBody* bodyBPtr = &m_tmpSolverBodyPool[solverBodyIdB];
|
|
|
|
|
|
|
|
|
|
int overrideNumSolverIterations = constraint->getOverrideNumSolverIterations() > 0 ? constraint->getOverrideNumSolverIterations() : infoGlobal.m_numIterations;
|
|
if (overrideNumSolverIterations>m_maxOverrideNumSolverIterations)
|
|
m_maxOverrideNumSolverIterations = overrideNumSolverIterations;
|
|
|
|
|
|
int j;
|
|
for ( j=0;j<info1.m_numConstraintRows;j++)
|
|
{
|
|
memset(¤tConstraintRow[j],0,sizeof(btSolverConstraint));
|
|
currentConstraintRow[j].m_lowerLimit = -SIMD_INFINITY;
|
|
currentConstraintRow[j].m_upperLimit = SIMD_INFINITY;
|
|
currentConstraintRow[j].m_appliedImpulse = 0.f;
|
|
currentConstraintRow[j].m_appliedPushImpulse = 0.f;
|
|
currentConstraintRow[j].m_solverBodyIdA = solverBodyIdA;
|
|
currentConstraintRow[j].m_solverBodyIdB = solverBodyIdB;
|
|
currentConstraintRow[j].m_overrideNumSolverIterations = overrideNumSolverIterations;
|
|
}
|
|
|
|
bodyAPtr->internalGetDeltaLinearVelocity().setValue(0.f,0.f,0.f);
|
|
bodyAPtr->internalGetDeltaAngularVelocity().setValue(0.f,0.f,0.f);
|
|
bodyAPtr->internalGetPushVelocity().setValue(0.f,0.f,0.f);
|
|
bodyAPtr->internalGetTurnVelocity().setValue(0.f,0.f,0.f);
|
|
bodyBPtr->internalGetDeltaLinearVelocity().setValue(0.f,0.f,0.f);
|
|
bodyBPtr->internalGetDeltaAngularVelocity().setValue(0.f,0.f,0.f);
|
|
bodyBPtr->internalGetPushVelocity().setValue(0.f,0.f,0.f);
|
|
bodyBPtr->internalGetTurnVelocity().setValue(0.f,0.f,0.f);
|
|
|
|
|
|
btTypedConstraint::btConstraintInfo2 info2;
|
|
info2.fps = 1.f/infoGlobal.m_timeStep;
|
|
info2.erp = infoGlobal.m_erp;
|
|
info2.m_J1linearAxis = currentConstraintRow->m_contactNormal;
|
|
info2.m_J1angularAxis = currentConstraintRow->m_relpos1CrossNormal;
|
|
info2.m_J2linearAxis = 0;
|
|
info2.m_J2angularAxis = currentConstraintRow->m_relpos2CrossNormal;
|
|
info2.rowskip = sizeof(btSolverConstraint)/sizeof(btScalar);//check this
|
|
///the size of btSolverConstraint needs be a multiple of btScalar
|
|
btAssert(info2.rowskip*sizeof(btScalar)== sizeof(btSolverConstraint));
|
|
info2.m_constraintError = ¤tConstraintRow->m_rhs;
|
|
currentConstraintRow->m_cfm = infoGlobal.m_globalCfm;
|
|
info2.m_damping = infoGlobal.m_damping;
|
|
info2.cfm = ¤tConstraintRow->m_cfm;
|
|
info2.m_lowerLimit = ¤tConstraintRow->m_lowerLimit;
|
|
info2.m_upperLimit = ¤tConstraintRow->m_upperLimit;
|
|
info2.m_numIterations = infoGlobal.m_numIterations;
|
|
constraints[i]->getInfo2(&info2);
|
|
|
|
///finalize the constraint setup
|
|
for ( j=0;j<info1.m_numConstraintRows;j++)
|
|
{
|
|
btSolverConstraint& solverConstraint = currentConstraintRow[j];
|
|
|
|
if (solverConstraint.m_upperLimit>=constraints[i]->getBreakingImpulseThreshold())
|
|
{
|
|
solverConstraint.m_upperLimit = constraints[i]->getBreakingImpulseThreshold();
|
|
}
|
|
|
|
if (solverConstraint.m_lowerLimit<=-constraints[i]->getBreakingImpulseThreshold())
|
|
{
|
|
solverConstraint.m_lowerLimit = -constraints[i]->getBreakingImpulseThreshold();
|
|
}
|
|
|
|
solverConstraint.m_originalContactPoint = constraint;
|
|
|
|
{
|
|
const btVector3& ftorqueAxis1 = solverConstraint.m_relpos1CrossNormal;
|
|
solverConstraint.m_angularComponentA = constraint->getRigidBodyA().getInvInertiaTensorWorld()*ftorqueAxis1*constraint->getRigidBodyA().getAngularFactor();
|
|
}
|
|
{
|
|
const btVector3& ftorqueAxis2 = solverConstraint.m_relpos2CrossNormal;
|
|
solverConstraint.m_angularComponentB = constraint->getRigidBodyB().getInvInertiaTensorWorld()*ftorqueAxis2*constraint->getRigidBodyB().getAngularFactor();
|
|
}
|
|
|
|
{
|
|
btVector3 iMJlA = solverConstraint.m_contactNormal*rbA.getInvMass();
|
|
btVector3 iMJaA = rbA.getInvInertiaTensorWorld()*solverConstraint.m_relpos1CrossNormal;
|
|
btVector3 iMJlB = solverConstraint.m_contactNormal*rbB.getInvMass();//sign of normal?
|
|
btVector3 iMJaB = rbB.getInvInertiaTensorWorld()*solverConstraint.m_relpos2CrossNormal;
|
|
|
|
btScalar sum = iMJlA.dot(solverConstraint.m_contactNormal);
|
|
sum += iMJaA.dot(solverConstraint.m_relpos1CrossNormal);
|
|
sum += iMJlB.dot(solverConstraint.m_contactNormal);
|
|
sum += iMJaB.dot(solverConstraint.m_relpos2CrossNormal);
|
|
btScalar fsum = btFabs(sum);
|
|
btAssert(fsum > SIMD_EPSILON);
|
|
solverConstraint.m_jacDiagABInv = fsum>SIMD_EPSILON?btScalar(1.)/sum : 0.f;
|
|
}
|
|
|
|
|
|
///fix rhs
|
|
///todo: add force/torque accelerators
|
|
{
|
|
btScalar rel_vel;
|
|
btScalar vel1Dotn = solverConstraint.m_contactNormal.dot(rbA.getLinearVelocity()) + solverConstraint.m_relpos1CrossNormal.dot(rbA.getAngularVelocity());
|
|
btScalar vel2Dotn = -solverConstraint.m_contactNormal.dot(rbB.getLinearVelocity()) + solverConstraint.m_relpos2CrossNormal.dot(rbB.getAngularVelocity());
|
|
|
|
rel_vel = vel1Dotn+vel2Dotn;
|
|
|
|
btScalar restitution = 0.f;
|
|
btScalar positionalError = solverConstraint.m_rhs;//already filled in by getConstraintInfo2
|
|
btScalar velocityError = restitution - rel_vel * info2.m_damping;
|
|
btScalar penetrationImpulse = positionalError*solverConstraint.m_jacDiagABInv;
|
|
btScalar velocityImpulse = velocityError *solverConstraint.m_jacDiagABInv;
|
|
solverConstraint.m_rhs = penetrationImpulse+velocityImpulse;
|
|
solverConstraint.m_appliedImpulse = 0.f;
|
|
|
|
}
|
|
}
|
|
}
|
|
currentRow+=m_tmpConstraintSizesPool[i].m_numConstraintRows;
|
|
}
|
|
#endif //DISABLE_JOINTS
|
|
}
|
|
|
|
|
|
{
|
|
int i;
|
|
|
|
for (i=0;i<numManifolds;i++)
|
|
{
|
|
btContact4& manifold = manifoldPtr[i];
|
|
convertContact(bodies,inertias,&manifold,infoGlobal);
|
|
}
|
|
}
|
|
}
|
|
|
|
// btContactSolverInfo info = infoGlobal;
|
|
|
|
|
|
int numNonContactPool = m_tmpSolverNonContactConstraintPool.size();
|
|
int numConstraintPool = m_tmpSolverContactConstraintPool.size();
|
|
int numFrictionPool = m_tmpSolverContactFrictionConstraintPool.size();
|
|
|
|
///@todo: use stack allocator for such temporarily memory, same for solver bodies/constraints
|
|
m_orderNonContactConstraintPool.resizeNoInitialize(numNonContactPool);
|
|
if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS))
|
|
m_orderTmpConstraintPool.resizeNoInitialize(numConstraintPool*2);
|
|
else
|
|
m_orderTmpConstraintPool.resizeNoInitialize(numConstraintPool);
|
|
|
|
m_orderFrictionConstraintPool.resizeNoInitialize(numFrictionPool);
|
|
{
|
|
int i;
|
|
for (i=0;i<numNonContactPool;i++)
|
|
{
|
|
m_orderNonContactConstraintPool[i] = i;
|
|
}
|
|
for (i=0;i<numConstraintPool;i++)
|
|
{
|
|
m_orderTmpConstraintPool[i] = i;
|
|
}
|
|
for (i=0;i<numFrictionPool;i++)
|
|
{
|
|
m_orderFrictionConstraintPool[i] = i;
|
|
}
|
|
}
|
|
|
|
return 0.f;
|
|
|
|
}
|
|
|
|
|
|
btScalar btPgsJacobiSolver::solveSingleIteration(int iteration,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal)
|
|
{
|
|
|
|
int numNonContactPool = m_tmpSolverNonContactConstraintPool.size();
|
|
int numConstraintPool = m_tmpSolverContactConstraintPool.size();
|
|
int numFrictionPool = m_tmpSolverContactFrictionConstraintPool.size();
|
|
|
|
if (infoGlobal.m_solverMode & SOLVER_RANDMIZE_ORDER)
|
|
{
|
|
if (1) // uncomment this for a bit less random ((iteration & 7) == 0)
|
|
{
|
|
|
|
for (int j=0; j<numNonContactPool; ++j) {
|
|
int tmp = m_orderNonContactConstraintPool[j];
|
|
int swapi = btRandInt2(j+1);
|
|
m_orderNonContactConstraintPool[j] = m_orderNonContactConstraintPool[swapi];
|
|
m_orderNonContactConstraintPool[swapi] = tmp;
|
|
}
|
|
|
|
//contact/friction constraints are not solved more than
|
|
if (iteration< infoGlobal.m_numIterations)
|
|
{
|
|
for (int j=0; j<numConstraintPool; ++j) {
|
|
int tmp = m_orderTmpConstraintPool[j];
|
|
int swapi = btRandInt2(j+1);
|
|
m_orderTmpConstraintPool[j] = m_orderTmpConstraintPool[swapi];
|
|
m_orderTmpConstraintPool[swapi] = tmp;
|
|
}
|
|
|
|
for (int j=0; j<numFrictionPool; ++j) {
|
|
int tmp = m_orderFrictionConstraintPool[j];
|
|
int swapi = btRandInt2(j+1);
|
|
m_orderFrictionConstraintPool[j] = m_orderFrictionConstraintPool[swapi];
|
|
m_orderFrictionConstraintPool[swapi] = tmp;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (infoGlobal.m_solverMode & SOLVER_SIMD)
|
|
{
|
|
///solve all joint constraints, using SIMD, if available
|
|
for (int j=0;j<m_tmpSolverNonContactConstraintPool.size();j++)
|
|
{
|
|
btSolverConstraint& constraint = m_tmpSolverNonContactConstraintPool[m_orderNonContactConstraintPool[j]];
|
|
if (iteration < constraint.m_overrideNumSolverIterations)
|
|
resolveSingleConstraintRowGenericSIMD(m_tmpSolverBodyPool[constraint.m_solverBodyIdA],m_tmpSolverBodyPool[constraint.m_solverBodyIdB],constraint);
|
|
}
|
|
|
|
if (iteration< infoGlobal.m_numIterations)
|
|
{
|
|
#ifndef DISABLE_JOINTS
|
|
for (int j=0;j<numConstraints;j++)
|
|
{
|
|
if (constraints[j]->isEnabled())
|
|
{
|
|
int bodyAid = getOrInitSolverBody(constraints[j]->getRigidBodyA());
|
|
int bodyBid = getOrInitSolverBody(constraints[j]->getRigidBodyB());
|
|
btSolverBody& bodyA = m_tmpSolverBodyPool[bodyAid];
|
|
btSolverBody& bodyB = m_tmpSolverBodyPool[bodyBid];
|
|
constraints[j]->solveConstraintObsolete(bodyA,bodyB,infoGlobal.m_timeStep);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
///solve all contact constraints using SIMD, if available
|
|
if (infoGlobal.m_solverMode & SOLVER_INTERLEAVE_CONTACT_AND_FRICTION_CONSTRAINTS)
|
|
{
|
|
int numPoolConstraints = m_tmpSolverContactConstraintPool.size();
|
|
int multiplier = (infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS)? 2 : 1;
|
|
|
|
for (int c=0;c<numPoolConstraints;c++)
|
|
{
|
|
btScalar totalImpulse =0;
|
|
|
|
{
|
|
const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[c]];
|
|
resolveSingleConstraintRowLowerLimitSIMD(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
totalImpulse = solveManifold.m_appliedImpulse;
|
|
}
|
|
bool applyFriction = true;
|
|
if (applyFriction)
|
|
{
|
|
{
|
|
|
|
btSolverConstraint& solveManifold = m_tmpSolverContactFrictionConstraintPool[m_orderFrictionConstraintPool[c*multiplier]];
|
|
|
|
if (totalImpulse>btScalar(0))
|
|
{
|
|
solveManifold.m_lowerLimit = -(solveManifold.m_friction*totalImpulse);
|
|
solveManifold.m_upperLimit = solveManifold.m_friction*totalImpulse;
|
|
|
|
resolveSingleConstraintRowGenericSIMD(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
}
|
|
}
|
|
|
|
if (infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS)
|
|
{
|
|
|
|
btSolverConstraint& solveManifold = m_tmpSolverContactFrictionConstraintPool[m_orderFrictionConstraintPool[c*multiplier+1]];
|
|
|
|
if (totalImpulse>btScalar(0))
|
|
{
|
|
solveManifold.m_lowerLimit = -(solveManifold.m_friction*totalImpulse);
|
|
solveManifold.m_upperLimit = solveManifold.m_friction*totalImpulse;
|
|
|
|
resolveSingleConstraintRowGenericSIMD(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
else//SOLVER_INTERLEAVE_CONTACT_AND_FRICTION_CONSTRAINTS
|
|
{
|
|
//solve the friction constraints after all contact constraints, don't interleave them
|
|
int numPoolConstraints = m_tmpSolverContactConstraintPool.size();
|
|
int j;
|
|
|
|
for (j=0;j<numPoolConstraints;j++)
|
|
{
|
|
const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[j]];
|
|
resolveSingleConstraintRowLowerLimitSIMD(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
|
|
}
|
|
|
|
if (!m_usePgs)
|
|
averageVelocities();
|
|
|
|
|
|
///solve all friction constraints, using SIMD, if available
|
|
|
|
int numFrictionPoolConstraints = m_tmpSolverContactFrictionConstraintPool.size();
|
|
for (j=0;j<numFrictionPoolConstraints;j++)
|
|
{
|
|
btSolverConstraint& solveManifold = m_tmpSolverContactFrictionConstraintPool[m_orderFrictionConstraintPool[j]];
|
|
btScalar totalImpulse = m_tmpSolverContactConstraintPool[solveManifold.m_frictionIndex].m_appliedImpulse;
|
|
|
|
if (totalImpulse>btScalar(0))
|
|
{
|
|
solveManifold.m_lowerLimit = -(solveManifold.m_friction*totalImpulse);
|
|
solveManifold.m_upperLimit = solveManifold.m_friction*totalImpulse;
|
|
|
|
resolveSingleConstraintRowGenericSIMD(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
}
|
|
}
|
|
|
|
|
|
int numRollingFrictionPoolConstraints = m_tmpSolverContactRollingFrictionConstraintPool.size();
|
|
for (j=0;j<numRollingFrictionPoolConstraints;j++)
|
|
{
|
|
|
|
btSolverConstraint& rollingFrictionConstraint = m_tmpSolverContactRollingFrictionConstraintPool[j];
|
|
btScalar totalImpulse = m_tmpSolverContactConstraintPool[rollingFrictionConstraint.m_frictionIndex].m_appliedImpulse;
|
|
if (totalImpulse>btScalar(0))
|
|
{
|
|
btScalar rollingFrictionMagnitude = rollingFrictionConstraint.m_friction*totalImpulse;
|
|
if (rollingFrictionMagnitude>rollingFrictionConstraint.m_friction)
|
|
rollingFrictionMagnitude = rollingFrictionConstraint.m_friction;
|
|
|
|
rollingFrictionConstraint.m_lowerLimit = -rollingFrictionMagnitude;
|
|
rollingFrictionConstraint.m_upperLimit = rollingFrictionMagnitude;
|
|
|
|
resolveSingleConstraintRowGenericSIMD(m_tmpSolverBodyPool[rollingFrictionConstraint.m_solverBodyIdA],m_tmpSolverBodyPool[rollingFrictionConstraint.m_solverBodyIdB],rollingFrictionConstraint);
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
} else
|
|
{
|
|
//non-SIMD version
|
|
///solve all joint constraints
|
|
for (int j=0;j<m_tmpSolverNonContactConstraintPool.size();j++)
|
|
{
|
|
btSolverConstraint& constraint = m_tmpSolverNonContactConstraintPool[m_orderNonContactConstraintPool[j]];
|
|
if (iteration < constraint.m_overrideNumSolverIterations)
|
|
resolveSingleConstraintRowGeneric(m_tmpSolverBodyPool[constraint.m_solverBodyIdA],m_tmpSolverBodyPool[constraint.m_solverBodyIdB],constraint);
|
|
}
|
|
|
|
if (iteration< infoGlobal.m_numIterations)
|
|
{
|
|
#ifndef DISABLE_JOINTS
|
|
for (int j=0;j<numConstraints;j++)
|
|
{
|
|
if (constraints[j]->isEnabled())
|
|
{
|
|
int bodyAid = getOrInitSolverBody(constraints[j]->getRigidBodyA());
|
|
int bodyBid = getOrInitSolverBody(constraints[j]->getRigidBodyB());
|
|
btSolverBody& bodyA = m_tmpSolverBodyPool[bodyAid];
|
|
btSolverBody& bodyB = m_tmpSolverBodyPool[bodyBid];
|
|
constraints[j]->solveConstraintObsolete(bodyA,bodyB,infoGlobal.m_timeStep);
|
|
}
|
|
}
|
|
#endif //DISABLE_JOINTS
|
|
|
|
///solve all contact constraints
|
|
int numPoolConstraints = m_tmpSolverContactConstraintPool.size();
|
|
for (int j=0;j<numPoolConstraints;j++)
|
|
{
|
|
const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[j]];
|
|
resolveSingleConstraintRowLowerLimit(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
}
|
|
///solve all friction constraints
|
|
int numFrictionPoolConstraints = m_tmpSolverContactFrictionConstraintPool.size();
|
|
for (int j=0;j<numFrictionPoolConstraints;j++)
|
|
{
|
|
btSolverConstraint& solveManifold = m_tmpSolverContactFrictionConstraintPool[m_orderFrictionConstraintPool[j]];
|
|
btScalar totalImpulse = m_tmpSolverContactConstraintPool[solveManifold.m_frictionIndex].m_appliedImpulse;
|
|
|
|
if (totalImpulse>btScalar(0))
|
|
{
|
|
solveManifold.m_lowerLimit = -(solveManifold.m_friction*totalImpulse);
|
|
solveManifold.m_upperLimit = solveManifold.m_friction*totalImpulse;
|
|
|
|
resolveSingleConstraintRowGeneric(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
}
|
|
}
|
|
|
|
int numRollingFrictionPoolConstraints = m_tmpSolverContactRollingFrictionConstraintPool.size();
|
|
for (int j=0;j<numRollingFrictionPoolConstraints;j++)
|
|
{
|
|
btSolverConstraint& rollingFrictionConstraint = m_tmpSolverContactRollingFrictionConstraintPool[j];
|
|
btScalar totalImpulse = m_tmpSolverContactConstraintPool[rollingFrictionConstraint.m_frictionIndex].m_appliedImpulse;
|
|
if (totalImpulse>btScalar(0))
|
|
{
|
|
btScalar rollingFrictionMagnitude = rollingFrictionConstraint.m_friction*totalImpulse;
|
|
if (rollingFrictionMagnitude>rollingFrictionConstraint.m_friction)
|
|
rollingFrictionMagnitude = rollingFrictionConstraint.m_friction;
|
|
|
|
rollingFrictionConstraint.m_lowerLimit = -rollingFrictionMagnitude;
|
|
rollingFrictionConstraint.m_upperLimit = rollingFrictionMagnitude;
|
|
|
|
resolveSingleConstraintRowGeneric(m_tmpSolverBodyPool[rollingFrictionConstraint.m_solverBodyIdA],m_tmpSolverBodyPool[rollingFrictionConstraint.m_solverBodyIdB],rollingFrictionConstraint);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0.f;
|
|
}
|
|
|
|
|
|
void btPgsJacobiSolver::solveGroupCacheFriendlySplitImpulseIterations(btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal)
|
|
{
|
|
int iteration;
|
|
if (infoGlobal.m_splitImpulse)
|
|
{
|
|
if (infoGlobal.m_solverMode & SOLVER_SIMD)
|
|
{
|
|
for ( iteration = 0;iteration<infoGlobal.m_numIterations;iteration++)
|
|
{
|
|
{
|
|
int numPoolConstraints = m_tmpSolverContactConstraintPool.size();
|
|
int j;
|
|
for (j=0;j<numPoolConstraints;j++)
|
|
{
|
|
const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[j]];
|
|
|
|
resolveSplitPenetrationSIMD(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for ( iteration = 0;iteration<infoGlobal.m_numIterations;iteration++)
|
|
{
|
|
{
|
|
int numPoolConstraints = m_tmpSolverContactConstraintPool.size();
|
|
int j;
|
|
for (j=0;j<numPoolConstraints;j++)
|
|
{
|
|
const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[j]];
|
|
|
|
resolveSplitPenetrationImpulseCacheFriendly(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA],m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
btScalar btPgsJacobiSolver::solveGroupCacheFriendlyIterations(btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal)
|
|
{
|
|
BT_PROFILE("solveGroupCacheFriendlyIterations");
|
|
|
|
{
|
|
///this is a special step to resolve penetrations (just for contacts)
|
|
solveGroupCacheFriendlySplitImpulseIterations(constraints,numConstraints,infoGlobal);
|
|
|
|
int maxIterations = m_maxOverrideNumSolverIterations > infoGlobal.m_numIterations? m_maxOverrideNumSolverIterations : infoGlobal.m_numIterations;
|
|
|
|
for ( int iteration = 0 ; iteration< maxIterations ; iteration++)
|
|
//for ( int iteration = maxIterations-1 ; iteration >= 0;iteration--)
|
|
{
|
|
|
|
solveSingleIteration(iteration, constraints,numConstraints,infoGlobal);
|
|
|
|
|
|
if (!m_usePgs)
|
|
{
|
|
averageVelocities();
|
|
}
|
|
}
|
|
|
|
}
|
|
return 0.f;
|
|
}
|
|
|
|
void btPgsJacobiSolver::averageVelocities()
|
|
{
|
|
BT_PROFILE("averaging");
|
|
//average the velocities
|
|
int numBodies = m_bodyCount.size();
|
|
|
|
m_deltaLinearVelocities.resize(0);
|
|
m_deltaLinearVelocities.resize(numBodies,btVector3(0,0,0));
|
|
m_deltaAngularVelocities.resize(0);
|
|
m_deltaAngularVelocities.resize(numBodies,btVector3(0,0,0));
|
|
|
|
for (int i=0;i<m_tmpSolverBodyPool.size();i++)
|
|
{
|
|
if (!m_tmpSolverBodyPool[i].m_invMass.isZero())
|
|
{
|
|
int orgBodyIndex = m_tmpSolverBodyPool[i].m_originalBodyIndex;
|
|
m_deltaLinearVelocities[orgBodyIndex]+=m_tmpSolverBodyPool[i].getDeltaLinearVelocity();
|
|
m_deltaAngularVelocities[orgBodyIndex]+=m_tmpSolverBodyPool[i].getDeltaAngularVelocity();
|
|
}
|
|
}
|
|
|
|
for (int i=0;i<m_tmpSolverBodyPool.size();i++)
|
|
{
|
|
int orgBodyIndex = m_tmpSolverBodyPool[i].m_originalBodyIndex;
|
|
|
|
if (!m_tmpSolverBodyPool[i].m_invMass.isZero())
|
|
{
|
|
|
|
btAssert(m_bodyCount[orgBodyIndex] == m_bodyCountCheck[orgBodyIndex]);
|
|
|
|
btScalar factor = 1.f/btScalar(m_bodyCount[orgBodyIndex]);
|
|
|
|
|
|
m_tmpSolverBodyPool[i].m_deltaLinearVelocity = m_deltaLinearVelocities[orgBodyIndex]*factor;
|
|
m_tmpSolverBodyPool[i].m_deltaAngularVelocity = m_deltaAngularVelocities[orgBodyIndex]*factor;
|
|
}
|
|
}
|
|
}
|
|
|
|
btScalar btPgsJacobiSolver::solveGroupCacheFriendlyFinish(btRigidBodyCL* bodies,btInertiaCL* inertias,int numBodies,const btContactSolverInfo& infoGlobal)
|
|
{
|
|
int numPoolConstraints = m_tmpSolverContactConstraintPool.size();
|
|
int i,j;
|
|
|
|
if (infoGlobal.m_solverMode & SOLVER_USE_WARMSTARTING)
|
|
{
|
|
for (j=0;j<numPoolConstraints;j++)
|
|
{
|
|
const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[j];
|
|
btContactPoint* pt = (btContactPoint*) solveManifold.m_originalContactPoint;
|
|
btAssert(pt);
|
|
pt->m_appliedImpulse = solveManifold.m_appliedImpulse;
|
|
// float f = m_tmpSolverContactFrictionConstraintPool[solveManifold.m_frictionIndex].m_appliedImpulse;
|
|
// printf("pt->m_appliedImpulseLateral1 = %f\n", f);
|
|
pt->m_appliedImpulseLateral1 = m_tmpSolverContactFrictionConstraintPool[solveManifold.m_frictionIndex].m_appliedImpulse;
|
|
//printf("pt->m_appliedImpulseLateral1 = %f\n", pt->m_appliedImpulseLateral1);
|
|
if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS))
|
|
{
|
|
pt->m_appliedImpulseLateral2 = m_tmpSolverContactFrictionConstraintPool[solveManifold.m_frictionIndex+1].m_appliedImpulse;
|
|
}
|
|
//do a callback here?
|
|
}
|
|
}
|
|
|
|
numPoolConstraints = m_tmpSolverNonContactConstraintPool.size();
|
|
for (j=0;j<numPoolConstraints;j++)
|
|
{
|
|
const btSolverConstraint& solverConstr = m_tmpSolverNonContactConstraintPool[j];
|
|
btTypedConstraint* constr = (btTypedConstraint*)solverConstr.m_originalContactPoint;
|
|
btJointFeedback* fb = constr->getJointFeedback();
|
|
if (fb)
|
|
{
|
|
fb->m_appliedForceBodyA += solverConstr.m_contactNormal*solverConstr.m_appliedImpulse*constr->getRigidBodyA().getLinearFactor()/infoGlobal.m_timeStep;
|
|
fb->m_appliedForceBodyB += -solverConstr.m_contactNormal*solverConstr.m_appliedImpulse*constr->getRigidBodyB().getLinearFactor()/infoGlobal.m_timeStep;
|
|
fb->m_appliedTorqueBodyA += solverConstr.m_relpos1CrossNormal* constr->getRigidBodyA().getAngularFactor()*solverConstr.m_appliedImpulse/infoGlobal.m_timeStep;
|
|
fb->m_appliedTorqueBodyB += -solverConstr.m_relpos1CrossNormal* constr->getRigidBodyB().getAngularFactor()*solverConstr.m_appliedImpulse/infoGlobal.m_timeStep;
|
|
|
|
}
|
|
|
|
constr->internalSetAppliedImpulse(solverConstr.m_appliedImpulse);
|
|
if (btFabs(solverConstr.m_appliedImpulse)>=constr->getBreakingImpulseThreshold())
|
|
{
|
|
constr->setEnabled(false);
|
|
}
|
|
}
|
|
|
|
{
|
|
BT_PROFILE("write back velocities and transforms");
|
|
for ( i=0;i<m_tmpSolverBodyPool.size();i++)
|
|
{
|
|
int bodyIndex = m_tmpSolverBodyPool[i].m_originalBodyIndex;
|
|
//btAssert(i==bodyIndex);
|
|
|
|
btRigidBodyCL* body = &bodies[bodyIndex];
|
|
if (body->getInvMass())
|
|
{
|
|
if (infoGlobal.m_splitImpulse)
|
|
m_tmpSolverBodyPool[i].writebackVelocityAndTransform(infoGlobal.m_timeStep, infoGlobal.m_splitImpulseTurnErp);
|
|
else
|
|
m_tmpSolverBodyPool[i].writebackVelocity();
|
|
|
|
if (m_usePgs)
|
|
{
|
|
body->m_linVel = m_tmpSolverBodyPool[i].m_linearVelocity;
|
|
body->m_angVel = m_tmpSolverBodyPool[i].m_angularVelocity;
|
|
} else
|
|
{
|
|
btScalar factor = 1.f/btScalar(m_bodyCount[bodyIndex]);
|
|
|
|
btVector3 deltaLinVel = m_deltaLinearVelocities[bodyIndex]*factor;
|
|
btVector3 deltaAngVel = m_deltaAngularVelocities[bodyIndex]*factor;
|
|
//printf("body %d\n",bodyIndex);
|
|
//printf("deltaLinVel = %f,%f,%f\n",deltaLinVel.getX(),deltaLinVel.getY(),deltaLinVel.getZ());
|
|
//printf("deltaAngVel = %f,%f,%f\n",deltaAngVel.getX(),deltaAngVel.getY(),deltaAngVel.getZ());
|
|
|
|
body->m_linVel += deltaLinVel;
|
|
body->m_angVel += deltaAngVel;
|
|
}
|
|
|
|
if (infoGlobal.m_splitImpulse)
|
|
{
|
|
body->m_pos = m_tmpSolverBodyPool[i].m_worldTransform.getOrigin();
|
|
btQuaternion orn;
|
|
orn = m_tmpSolverBodyPool[i].m_worldTransform.getRotation();
|
|
body->m_quat = orn;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
m_tmpSolverContactConstraintPool.resizeNoInitialize(0);
|
|
m_tmpSolverNonContactConstraintPool.resizeNoInitialize(0);
|
|
m_tmpSolverContactFrictionConstraintPool.resizeNoInitialize(0);
|
|
m_tmpSolverContactRollingFrictionConstraintPool.resizeNoInitialize(0);
|
|
|
|
m_tmpSolverBodyPool.resizeNoInitialize(0);
|
|
return 0.f;
|
|
}
|
|
|
|
|
|
|
|
void btPgsJacobiSolver::reset()
|
|
{
|
|
m_btSeed2 = 0;
|
|
} |