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Diffstat (limited to 'extern/bullet2/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.cpp')
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diff --git a/extern/bullet2/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.cpp b/extern/bullet2/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.cpp new file mode 100644 index 00000000000..4e1048823c0 --- /dev/null +++ b/extern/bullet2/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.cpp @@ -0,0 +1,1174 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +This software is provided 'as-is', without any express or implied warranty. +In no event will the authors be held liable for any damages arising from the use of this software. +Permission is granted to anyone to use this software for any purpose, +including commercial applications, and to alter it and redistribute it freely, +subject to the following restrictions: + +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. +2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. +3. This notice may not be removed or altered from any source distribution. +*/ + +//#define COMPUTE_IMPULSE_DENOM 1 +//It is not necessary (redundant) to refresh contact manifolds, this refresh has been moved to the collision algorithms. + +#include "btSequentialImpulseConstraintSolver.h" +#include "BulletCollision/NarrowPhaseCollision/btPersistentManifold.h" +#include "BulletDynamics/Dynamics/btRigidBody.h" +#include "btContactConstraint.h" +#include "btSolve2LinearConstraint.h" +#include "btContactSolverInfo.h" +#include "LinearMath/btIDebugDraw.h" +#include "btJacobianEntry.h" +#include "LinearMath/btMinMax.h" +#include "BulletDynamics/ConstraintSolver/btTypedConstraint.h" +#include <new> +#include "LinearMath/btStackAlloc.h" +#include "LinearMath/btQuickprof.h" +#include "btSolverBody.h" +#include "btSolverConstraint.h" +#include "LinearMath/btAlignedObjectArray.h" +#include <string.h> //for memset + +int gNumSplitImpulseRecoveries = 0; + +btSequentialImpulseConstraintSolver::btSequentialImpulseConstraintSolver() +:m_btSeed2(0) +{ + +} + +btSequentialImpulseConstraintSolver::~btSequentialImpulseConstraintSolver() +{ +} + +#ifdef USE_SIMD +#include <emmintrin.h> +#define vec_splat(x, e) _mm_shuffle_ps(x, x, _MM_SHUFFLE(e,e,e,e)) +static inline __m128 _vmathVfDot3( __m128 vec0, __m128 vec1 ) +{ + __m128 result = _mm_mul_ps( vec0, vec1); + return _mm_add_ps( vec_splat( result, 0 ), _mm_add_ps( vec_splat( result, 1 ), vec_splat( result, 2 ) ) ); +} +#endif//USE_SIMD + +// Project Gauss Seidel or the equivalent Sequential Impulse +void btSequentialImpulseConstraintSolver::resolveSingleConstraintRowGenericSIMD(btRigidBody& body1,btRigidBody& body2,const btSolverConstraint& c) +{ +#ifdef USE_SIMD + __m128 cpAppliedImp = _mm_set1_ps(c.m_appliedImpulse); + __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_rhs), _mm_mul_ps(_mm_set1_ps(c.m_appliedImpulse),_mm_set1_ps(c.m_cfm))); + __m128 deltaVel1Dotn = _mm_add_ps(_vmathVfDot3(c.m_contactNormal.mVec128,body1.internalGetDeltaLinearVelocity().mVec128), _vmathVfDot3(c.m_relpos1CrossNormal.mVec128,body1.internalGetDeltaAngularVelocity().mVec128)); + __m128 deltaVel2Dotn = _mm_sub_ps(_vmathVfDot3(c.m_relpos2CrossNormal.mVec128,body2.internalGetDeltaAngularVelocity().mVec128),_vmathVfDot3((c.m_contactNormal).mVec128,body2.internalGetDeltaLinearVelocity().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_appliedImpulse = _mm_or_ps( _mm_and_ps(resultLowerLess, lowerLimit1), _mm_andnot_ps(resultLowerLess, sum) ); + __m128 upperMinApplied = _mm_sub_ps(upperLimit1,cpAppliedImp); + deltaImpulse = _mm_or_ps( _mm_and_ps(resultUpperLess, deltaImpulse), _mm_andnot_ps(resultUpperLess, upperMinApplied) ); + c.m_appliedImpulse = _mm_or_ps( _mm_and_ps(resultUpperLess, c.m_appliedImpulse), _mm_andnot_ps(resultUpperLess, upperLimit1) ); + __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.internalGetDeltaLinearVelocity().mVec128 = _mm_add_ps(body1.internalGetDeltaLinearVelocity().mVec128,_mm_mul_ps(linearComponentA,impulseMagnitude)); + body1.internalGetDeltaAngularVelocity().mVec128 = _mm_add_ps(body1.internalGetDeltaAngularVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentA.mVec128,impulseMagnitude)); + body2.internalGetDeltaLinearVelocity().mVec128 = _mm_sub_ps(body2.internalGetDeltaLinearVelocity().mVec128,_mm_mul_ps(linearComponentB,impulseMagnitude)); + body2.internalGetDeltaAngularVelocity().mVec128 = _mm_add_ps(body2.internalGetDeltaAngularVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentB.mVec128,impulseMagnitude)); +#else + resolveSingleConstraintRowGeneric(body1,body2,c); +#endif +} + +// Project Gauss Seidel or the equivalent Sequential Impulse + void btSequentialImpulseConstraintSolver::resolveSingleConstraintRowGeneric(btRigidBody& body1,btRigidBody& body2,const btSolverConstraint& c) +{ + btScalar deltaImpulse = c.m_rhs-btScalar(c.m_appliedImpulse)*c.m_cfm; + const btScalar deltaVel1Dotn = c.m_contactNormal.dot(body1.internalGetDeltaLinearVelocity()) + c.m_relpos1CrossNormal.dot(body1.internalGetDeltaAngularVelocity()); + const btScalar deltaVel2Dotn = -c.m_contactNormal.dot(body2.internalGetDeltaLinearVelocity()) + c.m_relpos2CrossNormal.dot(body2.internalGetDeltaAngularVelocity()); + +// const btScalar delta_rel_vel = deltaVel1Dotn-deltaVel2Dotn; + deltaImpulse -= deltaVel1Dotn*c.m_jacDiagABInv; + deltaImpulse -= deltaVel2Dotn*c.m_jacDiagABInv; + + const btScalar sum = btScalar(c.m_appliedImpulse) + deltaImpulse; + if (sum < c.m_lowerLimit) + { + deltaImpulse = c.m_lowerLimit-c.m_appliedImpulse; + c.m_appliedImpulse = c.m_lowerLimit; + } + else if (sum > c.m_upperLimit) + { + deltaImpulse = c.m_upperLimit-c.m_appliedImpulse; + c.m_appliedImpulse = c.m_upperLimit; + } + else + { + c.m_appliedImpulse = sum; + } + body1.internalApplyImpulse(c.m_contactNormal*body1.internalGetInvMass(),c.m_angularComponentA,deltaImpulse); + body2.internalApplyImpulse(-c.m_contactNormal*body2.internalGetInvMass(),c.m_angularComponentB,deltaImpulse); +} + + void btSequentialImpulseConstraintSolver::resolveSingleConstraintRowLowerLimitSIMD(btRigidBody& body1,btRigidBody& body2,const btSolverConstraint& c) +{ +#ifdef USE_SIMD + __m128 cpAppliedImp = _mm_set1_ps(c.m_appliedImpulse); + __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_rhs), _mm_mul_ps(_mm_set1_ps(c.m_appliedImpulse),_mm_set1_ps(c.m_cfm))); + __m128 deltaVel1Dotn = _mm_add_ps(_vmathVfDot3(c.m_contactNormal.mVec128,body1.internalGetDeltaLinearVelocity().mVec128), _vmathVfDot3(c.m_relpos1CrossNormal.mVec128,body1.internalGetDeltaAngularVelocity().mVec128)); + __m128 deltaVel2Dotn = _mm_sub_ps(_vmathVfDot3(c.m_relpos2CrossNormal.mVec128,body2.internalGetDeltaAngularVelocity().mVec128),_vmathVfDot3((c.m_contactNormal).mVec128,body2.internalGetDeltaLinearVelocity().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_appliedImpulse = _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.internalGetDeltaLinearVelocity().mVec128 = _mm_add_ps(body1.internalGetDeltaLinearVelocity().mVec128,_mm_mul_ps(linearComponentA,impulseMagnitude)); + body1.internalGetDeltaAngularVelocity().mVec128 = _mm_add_ps(body1.internalGetDeltaAngularVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentA.mVec128,impulseMagnitude)); + body2.internalGetDeltaLinearVelocity().mVec128 = _mm_sub_ps(body2.internalGetDeltaLinearVelocity().mVec128,_mm_mul_ps(linearComponentB,impulseMagnitude)); + body2.internalGetDeltaAngularVelocity().mVec128 = _mm_add_ps(body2.internalGetDeltaAngularVelocity().mVec128 ,_mm_mul_ps(c.m_angularComponentB.mVec128,impulseMagnitude)); +#else + resolveSingleConstraintRowLowerLimit(body1,body2,c); +#endif +} + +// Project Gauss Seidel or the equivalent Sequential Impulse + void btSequentialImpulseConstraintSolver::resolveSingleConstraintRowLowerLimit(btRigidBody& body1,btRigidBody& body2,const btSolverConstraint& c) +{ + btScalar deltaImpulse = c.m_rhs-btScalar(c.m_appliedImpulse)*c.m_cfm; + const btScalar deltaVel1Dotn = c.m_contactNormal.dot(body1.internalGetDeltaLinearVelocity()) + c.m_relpos1CrossNormal.dot(body1.internalGetDeltaAngularVelocity()); + const btScalar deltaVel2Dotn = -c.m_contactNormal.dot(body2.internalGetDeltaLinearVelocity()) + c.m_relpos2CrossNormal.dot(body2.internalGetDeltaAngularVelocity()); + + deltaImpulse -= deltaVel1Dotn*c.m_jacDiagABInv; + deltaImpulse -= deltaVel2Dotn*c.m_jacDiagABInv; + const btScalar sum = btScalar(c.m_appliedImpulse) + deltaImpulse; + if (sum < c.m_lowerLimit) + { + deltaImpulse = c.m_lowerLimit-c.m_appliedImpulse; + c.m_appliedImpulse = c.m_lowerLimit; + } + else + { + c.m_appliedImpulse = sum; + } + body1.internalApplyImpulse(c.m_contactNormal*body1.internalGetInvMass(),c.m_angularComponentA,deltaImpulse); + body2.internalApplyImpulse(-c.m_contactNormal*body2.internalGetInvMass(),c.m_angularComponentB,deltaImpulse); +} + + +void btSequentialImpulseConstraintSolver::resolveSplitPenetrationImpulseCacheFriendly( + btRigidBody& body1, + btRigidBody& body2, + const btSolverConstraint& c) +{ + if (c.m_rhsPenetration) + { + gNumSplitImpulseRecoveries++; + btScalar deltaImpulse = c.m_rhsPenetration-btScalar(c.m_appliedPushImpulse)*c.m_cfm; + const btScalar deltaVel1Dotn = c.m_contactNormal.dot(body1.internalGetPushVelocity()) + c.m_relpos1CrossNormal.dot(body1.internalGetTurnVelocity()); + const btScalar deltaVel2Dotn = -c.m_contactNormal.dot(body2.internalGetPushVelocity()) + c.m_relpos2CrossNormal.dot(body2.internalGetTurnVelocity()); + + deltaImpulse -= deltaVel1Dotn*c.m_jacDiagABInv; + deltaImpulse -= deltaVel2Dotn*c.m_jacDiagABInv; + const btScalar sum = btScalar(c.m_appliedPushImpulse) + deltaImpulse; + if (sum < c.m_lowerLimit) + { + deltaImpulse = c.m_lowerLimit-c.m_appliedPushImpulse; + c.m_appliedPushImpulse = c.m_lowerLimit; + } + else + { + c.m_appliedPushImpulse = sum; + } + body1.internalApplyPushImpulse(c.m_contactNormal*body1.internalGetInvMass(),c.m_angularComponentA,deltaImpulse); + body2.internalApplyPushImpulse(-c.m_contactNormal*body2.internalGetInvMass(),c.m_angularComponentB,deltaImpulse); + } +} + + void btSequentialImpulseConstraintSolver::resolveSplitPenetrationSIMD(btRigidBody& body1,btRigidBody& body2,const btSolverConstraint& c) +{ +#ifdef USE_SIMD + if (!c.m_rhsPenetration) + return; + + gNumSplitImpulseRecoveries++; + + __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(_vmathVfDot3(c.m_contactNormal.mVec128,body1.internalGetPushVelocity().mVec128), _vmathVfDot3(c.m_relpos1CrossNormal.mVec128,body1.internalGetTurnVelocity().mVec128)); + __m128 deltaVel2Dotn = _mm_sub_ps(_vmathVfDot3(c.m_relpos2CrossNormal.mVec128,body2.internalGetTurnVelocity().mVec128),_vmathVfDot3((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_appliedImpulse = _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 btSequentialImpulseConstraintSolver::btRand2() +{ + m_btSeed2 = (1664525L*m_btSeed2 + 1013904223L) & 0xffffffff; + return m_btSeed2; +} + + + +//See ODE: adam's all-int straightforward(?) dRandInt (0..n-1) +int btSequentialImpulseConstraintSolver::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); +} + + +#if 0 +void btSequentialImpulseConstraintSolver::initSolverBody(btSolverBody* solverBody, btCollisionObject* collisionObject) +{ + btRigidBody* rb = collisionObject? btRigidBody::upcast(collisionObject) : 0; + + solverBody->internalGetDeltaLinearVelocity().setValue(0.f,0.f,0.f); + solverBody->internalGetDeltaAngularVelocity().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->internalGetInvMass() = btVector3(rb->getInvMass(),rb->getInvMass(),rb->getInvMass())*rb->getLinearFactor(); + solverBody->m_originalBody = rb; + solverBody->m_angularFactor = rb->getAngularFactor(); + } else + { + solverBody->internalGetInvMass().setValue(0,0,0); + solverBody->m_originalBody = 0; + solverBody->m_angularFactor.setValue(1,1,1); + } +} +#endif + + + + + +btScalar btSequentialImpulseConstraintSolver::restitutionCurve(btScalar rel_vel, btScalar restitution) +{ + btScalar rest = restitution * -rel_vel; + return rest; +} + + + +void applyAnisotropicFriction(btCollisionObject* colObj,btVector3& frictionDirection); +void applyAnisotropicFriction(btCollisionObject* colObj,btVector3& frictionDirection) +{ + if (colObj && colObj->hasAnisotropicFriction()) + { + // transform to local coordinates + btVector3 loc_lateral = frictionDirection * colObj->getWorldTransform().getBasis(); + const btVector3& friction_scaling = colObj->getAnisotropicFriction(); + //apply anisotropic friction + loc_lateral *= friction_scaling; + // ... and transform it back to global coordinates + frictionDirection = colObj->getWorldTransform().getBasis() * loc_lateral; + } +} + + +void btSequentialImpulseConstraintSolver::setupFrictionConstraint(btSolverConstraint& solverConstraint, const btVector3& normalAxis,btRigidBody* solverBodyA,btRigidBody* solverBodyB,btManifoldPoint& cp,const btVector3& rel_pos1,const btVector3& rel_pos2,btCollisionObject* colObj0,btCollisionObject* colObj1, btScalar relaxation, btScalar desiredVelocity, btScalar cfmSlip) +{ + + + btRigidBody* body0=btRigidBody::upcast(colObj0); + btRigidBody* body1=btRigidBody::upcast(colObj1); + + solverConstraint.m_contactNormal = normalAxis; + + solverConstraint.m_solverBodyA = body0 ? body0 : &getFixedBody(); + solverConstraint.m_solverBodyB = body1 ? body1 : &getFixedBody(); + + 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 ? body0->getInvInertiaTensorWorld()*ftorqueAxis1*body0->getAngularFactor() : btVector3(0,0,0); + } + { + btVector3 ftorqueAxis1 = rel_pos2.cross(-solverConstraint.m_contactNormal); + solverConstraint.m_relpos2CrossNormal = ftorqueAxis1; + solverConstraint.m_angularComponentB = body1 ? body1->getInvInertiaTensorWorld()*ftorqueAxis1*body1->getAngularFactor() : btVector3(0,0,0); + } + +#ifdef COMPUTE_IMPULSE_DENOM + btScalar denom0 = rb0->computeImpulseDenominator(pos1,solverConstraint.m_contactNormal); + btScalar denom1 = rb1->computeImpulseDenominator(pos2,solverConstraint.m_contactNormal); +#else + 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); + } + + +#endif //COMPUTE_IMPULSE_DENOM + btScalar denom = relaxation/(denom0+denom1); + solverConstraint.m_jacDiagABInv = denom; + +#ifdef _USE_JACOBIAN + solverConstraint.m_jac = btJacobianEntry ( + rel_pos1,rel_pos2,solverConstraint.m_contactNormal, + body0->getInvInertiaDiagLocal(), + body0->getInvMass(), + body1->getInvInertiaDiagLocal(), + body1->getInvMass()); +#endif //_USE_JACOBIAN + + + { + btScalar rel_vel; + btScalar vel1Dotn = solverConstraint.m_contactNormal.dot(body0?body0->getLinearVelocity():btVector3(0,0,0)) + + solverConstraint.m_relpos1CrossNormal.dot(body0?body0->getAngularVelocity():btVector3(0,0,0)); + btScalar vel2Dotn = -solverConstraint.m_contactNormal.dot(body1?body1->getLinearVelocity():btVector3(0,0,0)) + + solverConstraint.m_relpos2CrossNormal.dot(body1?body1->getAngularVelocity():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& btSequentialImpulseConstraintSolver::addFrictionConstraint(const btVector3& normalAxis,btRigidBody* solverBodyA,btRigidBody* solverBodyB,int frictionIndex,btManifoldPoint& cp,const btVector3& rel_pos1,const btVector3& rel_pos2,btCollisionObject* colObj0,btCollisionObject* colObj1, btScalar relaxation, btScalar desiredVelocity, btScalar cfmSlip) +{ + btSolverConstraint& solverConstraint = m_tmpSolverContactFrictionConstraintPool.expandNonInitializing(); + solverConstraint.m_frictionIndex = frictionIndex; + setupFrictionConstraint(solverConstraint, normalAxis, solverBodyA, solverBodyB, cp, rel_pos1, rel_pos2, + colObj0, colObj1, relaxation, desiredVelocity, cfmSlip); + return solverConstraint; +} + +int btSequentialImpulseConstraintSolver::getOrInitSolverBody(btCollisionObject& body) +{ +#if 0 + int solverBodyIdA = -1; + + if (body.getCompanionId() >= 0) + { + //body has already been converted + solverBodyIdA = body.getCompanionId(); + } else + { + btRigidBody* rb = btRigidBody::upcast(&body); + if (rb && rb->getInvMass()) + { + solverBodyIdA = m_tmpSolverBodyPool.size(); + btSolverBody& solverBody = m_tmpSolverBodyPool.expand(); + initSolverBody(&solverBody,&body); + body.setCompanionId(solverBodyIdA); + } else + { + return 0;//assume first one is a fixed solver body + } + } + return solverBodyIdA; +#endif + return 0; +} +#include <stdio.h> + + +void btSequentialImpulseConstraintSolver::setupContactConstraint(btSolverConstraint& solverConstraint, + btCollisionObject* colObj0, btCollisionObject* colObj1, + btManifoldPoint& cp, const btContactSolverInfo& infoGlobal, + btVector3& vel, btScalar& rel_vel, btScalar& relaxation, + btVector3& rel_pos1, btVector3& rel_pos2) +{ + btRigidBody* rb0 = btRigidBody::upcast(colObj0); + btRigidBody* rb1 = btRigidBody::upcast(colObj1); + + const btVector3& pos1 = cp.getPositionWorldOnA(); + const btVector3& pos2 = cp.getPositionWorldOnB(); + +// btVector3 rel_pos1 = pos1 - colObj0->getWorldTransform().getOrigin(); +// btVector3 rel_pos2 = pos2 - colObj1->getWorldTransform().getOrigin(); + rel_pos1 = pos1 - colObj0->getWorldTransform().getOrigin(); + rel_pos2 = pos2 - colObj1->getWorldTransform().getOrigin(); + + relaxation = 1.f; + + btVector3 torqueAxis0 = rel_pos1.cross(cp.m_normalWorldOnB); + solverConstraint.m_angularComponentA = rb0 ? rb0->getInvInertiaTensorWorld()*torqueAxis0*rb0->getAngularFactor() : btVector3(0,0,0); + btVector3 torqueAxis1 = rel_pos2.cross(cp.m_normalWorldOnB); + solverConstraint.m_angularComponentB = rb1 ? rb1->getInvInertiaTensorWorld()*-torqueAxis1*rb1->getAngularFactor() : btVector3(0,0,0); + + { +#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 = relaxation/(denom0+denom1); + solverConstraint.m_jacDiagABInv = denom; + } + + solverConstraint.m_contactNormal = cp.m_normalWorldOnB; + solverConstraint.m_relpos1CrossNormal = rel_pos1.cross(cp.m_normalWorldOnB); + solverConstraint.m_relpos2CrossNormal = rel_pos2.cross(-cp.m_normalWorldOnB); + + + + + btVector3 vel1 = rb0 ? rb0->getVelocityInLocalPoint(rel_pos1) : 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); + + btScalar penetration = cp.getDistance()+infoGlobal.m_linearSlop; + + + solverConstraint.m_friction = cp.m_combinedFriction; + + btScalar restitution = 0.f; + + if (cp.m_lifeTime>infoGlobal.m_restingContactRestitutionThreshold) + { + restitution = 0.f; + } else + { + 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) + rb0->internalApplyImpulse(solverConstraint.m_contactNormal*rb0->getInvMass()*rb0->getLinearFactor(),solverConstraint.m_angularComponentA,solverConstraint.m_appliedImpulse); + if (rb1) + rb1->internalApplyImpulse(solverConstraint.m_contactNormal*rb1->getInvMass()*rb1->getLinearFactor(),-solverConstraint.m_angularComponentB,-solverConstraint.m_appliedImpulse); + } else + { + solverConstraint.m_appliedImpulse = 0.f; + } + + solverConstraint.m_appliedPushImpulse = 0.f; + + { + btScalar rel_vel; + btScalar vel1Dotn = solverConstraint.m_contactNormal.dot(rb0?rb0->getLinearVelocity():btVector3(0,0,0)) + + solverConstraint.m_relpos1CrossNormal.dot(rb0?rb0->getAngularVelocity():btVector3(0,0,0)); + btScalar vel2Dotn = -solverConstraint.m_contactNormal.dot(rb1?rb1->getLinearVelocity():btVector3(0,0,0)) + + solverConstraint.m_relpos2CrossNormal.dot(rb1?rb1->getAngularVelocity():btVector3(0,0,0)); + + rel_vel = vel1Dotn+vel2Dotn; + + btScalar positionalError = 0.f; + positionalError = -penetration * infoGlobal.m_erp/infoGlobal.m_timeStep; + btScalar velocityError = restitution - rel_vel;// * damping; + btScalar penetrationImpulse = positionalError*solverConstraint.m_jacDiagABInv; + btScalar velocityImpulse = velocityError *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 btSequentialImpulseConstraintSolver::setFrictionConstraintImpulse( btSolverConstraint& solverConstraint, + btRigidBody* rb0, btRigidBody* rb1, + btManifoldPoint& cp, const btContactSolverInfo& infoGlobal) +{ + if (infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) + { + { + btSolverConstraint& frictionConstraint1 = m_tmpSolverContactFrictionConstraintPool[solverConstraint.m_frictionIndex]; + if (infoGlobal.m_solverMode & SOLVER_USE_WARMSTARTING) + { + frictionConstraint1.m_appliedImpulse = cp.m_appliedImpulseLateral1 * infoGlobal.m_warmstartingFactor; + if (rb0) + rb0->internalApplyImpulse(frictionConstraint1.m_contactNormal*rb0->getInvMass()*rb0->getLinearFactor(),frictionConstraint1.m_angularComponentA,frictionConstraint1.m_appliedImpulse); + if (rb1) + rb1->internalApplyImpulse(frictionConstraint1.m_contactNormal*rb1->getInvMass()*rb1->getLinearFactor(),-frictionConstraint1.m_angularComponentB,-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 (rb0) + rb0->internalApplyImpulse(frictionConstraint2.m_contactNormal*rb0->getInvMass(),frictionConstraint2.m_angularComponentA,frictionConstraint2.m_appliedImpulse); + if (rb1) + rb1->internalApplyImpulse(frictionConstraint2.m_contactNormal*rb1->getInvMass(),-frictionConstraint2.m_angularComponentB,-frictionConstraint2.m_appliedImpulse); + } else + { + frictionConstraint2.m_appliedImpulse = 0.f; + } + } + } else + { + btSolverConstraint& frictionConstraint1 = m_tmpSolverContactFrictionConstraintPool[solverConstraint.m_frictionIndex]; + frictionConstraint1.m_appliedImpulse = 0.f; + if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS)) + { + btSolverConstraint& frictionConstraint2 = m_tmpSolverContactFrictionConstraintPool[solverConstraint.m_frictionIndex+1]; + frictionConstraint2.m_appliedImpulse = 0.f; + } + } +} + + + + +void btSequentialImpulseConstraintSolver::convertContact(btPersistentManifold* manifold,const btContactSolverInfo& infoGlobal) +{ + btCollisionObject* colObj0=0,*colObj1=0; + + colObj0 = (btCollisionObject*)manifold->getBody0(); + colObj1 = (btCollisionObject*)manifold->getBody1(); + + + btRigidBody* solverBodyA = btRigidBody::upcast(colObj0); + btRigidBody* solverBodyB = btRigidBody::upcast(colObj1); + + ///avoid collision response between two static objects + if ((!solverBodyA || !solverBodyA->getInvMass()) && (!solverBodyB || !solverBodyB->getInvMass())) + return; + + for (int j=0;j<manifold->getNumContacts();j++) + { + + btManifoldPoint& cp = manifold->getContactPoint(j); + + if (cp.getDistance() <= manifold->getContactProcessingThreshold()) + { + 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_solverBodyA = rb0? rb0 : &getFixedBody(); + solverConstraint.m_solverBodyB = rb1? rb1 : &getFixedBody(); + solverConstraint.m_originalContactPoint = &cp; + + setupContactConstraint(solverConstraint, colObj0, colObj1, 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(); + + 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 /= 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();//?? + applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir2); + applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir2); + addFrictionConstraint(cp.m_lateralFrictionDir2,solverBodyA,solverBodyB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); + } + + applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir1); + applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir1); + addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyA,solverBodyB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); + cp.m_lateralFrictionInitialized = true; + } else + { + //re-calculate friction direction every frame, todo: check if this is really needed + btPlaneSpace1(cp.m_normalWorldOnB,cp.m_lateralFrictionDir1,cp.m_lateralFrictionDir2); + if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS)) + { + applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir2); + applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir2); + addFrictionConstraint(cp.m_lateralFrictionDir2,solverBodyA,solverBodyB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); + } + + applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir1); + applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir1); + addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyA,solverBodyB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); + + cp.m_lateralFrictionInitialized = true; + } + + } else + { + addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyA,solverBodyB,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(cp.m_lateralFrictionDir2,solverBodyA,solverBodyB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation, cp.m_contactMotion2, cp.m_contactCFM2); + } + + setFrictionConstraintImpulse( solverConstraint, rb0, rb1, cp, infoGlobal); + + } + } +} + + +btScalar btSequentialImpulseConstraintSolver::solveGroupCacheFriendlySetup(btCollisionObject** /*bodies */,int /*numBodies */,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer,btStackAlloc* stackAlloc) +{ + BT_PROFILE("solveGroupCacheFriendlySetup"); + (void)stackAlloc; + (void)debugDrawer; + + + if (!(numConstraints + numManifolds)) + { + // printf("empty\n"); + return 0.f; + } + + if (1) + { + int j; + for (j=0;j<numConstraints;j++) + { + btTypedConstraint* constraint = constraints[j]; + constraint->buildJacobian(); + } + } + //btRigidBody* rb0=0,*rb1=0; + + //if (1) + { + { + + int totalNumRows = 0; + int i; + + m_tmpConstraintSizesPool.resize(numConstraints); + //calculate the total number of contraint rows + for (i=0;i<numConstraints;i++) + { + btTypedConstraint::btConstraintInfo1& info1 = m_tmpConstraintSizesPool[i]; + constraints[i]->getInfo1(&info1); + totalNumRows += info1.m_numConstraintRows; + } + m_tmpSolverNonContactConstraintPool.resize(totalNumRows); + + + ///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 j; + for ( j=0;j<info1.m_numConstraintRows;j++) + { + memset(¤tConstraintRow[j],0,sizeof(btSolverConstraint)); + currentConstraintRow[j].m_lowerLimit = -FLT_MAX; + currentConstraintRow[j].m_upperLimit = FLT_MAX; + currentConstraintRow[j].m_appliedImpulse = 0.f; + currentConstraintRow[j].m_appliedPushImpulse = 0.f; + currentConstraintRow[j].m_solverBodyA = &rbA; + currentConstraintRow[j].m_solverBodyB = &rbB; + } + + rbA.internalGetDeltaLinearVelocity().setValue(0.f,0.f,0.f); + rbA.internalGetDeltaAngularVelocity().setValue(0.f,0.f,0.f); + rbB.internalGetDeltaLinearVelocity().setValue(0.f,0.f,0.f); + rbB.internalGetDeltaAngularVelocity().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.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]; + 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); + + solverConstraint.m_jacDiagABInv = btScalar(1.)/sum; + } + + + ///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;// * 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; + } + } + + { + int i; + btPersistentManifold* manifold = 0; +// btCollisionObject* colObj0=0,*colObj1=0; + + + for (i=0;i<numManifolds;i++) + { + manifold = manifoldPtr[i]; + convertContact(manifold,infoGlobal); + } + } + } + + btContactSolverInfo info = infoGlobal; + + + + int numConstraintPool = m_tmpSolverContactConstraintPool.size(); + int numFrictionPool = m_tmpSolverContactFrictionConstraintPool.size(); + + ///@todo: use stack allocator for such temporarily memory, same for solver bodies/constraints + m_orderTmpConstraintPool.resize(numConstraintPool); + m_orderFrictionConstraintPool.resize(numFrictionPool); + { + int 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 btSequentialImpulseConstraintSolver::solveSingleIteration(int iteration, btCollisionObject** /*bodies */,int /*numBodies*/,btPersistentManifold** /*manifoldPtr*/, int /*numManifolds*/,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* /*debugDrawer*/,btStackAlloc* /*stackAlloc*/) +{ + + int numConstraintPool = m_tmpSolverContactConstraintPool.size(); + int numFrictionPool = m_tmpSolverContactFrictionConstraintPool.size(); + + int j; + + if (infoGlobal.m_solverMode & SOLVER_RANDMIZE_ORDER) + { + if ((iteration & 7) == 0) { + for (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 (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 (j=0;j<m_tmpSolverNonContactConstraintPool.size();j++) + { + btSolverConstraint& constraint = m_tmpSolverNonContactConstraintPool[j]; + resolveSingleConstraintRowGenericSIMD(*constraint.m_solverBodyA,*constraint.m_solverBodyB,constraint); + } + + for (j=0;j<numConstraints;j++) + { + constraints[j]->solveConstraintObsolete(constraints[j]->getRigidBodyA(),constraints[j]->getRigidBodyB(),infoGlobal.m_timeStep); + } + + ///solve all contact constraints using SIMD, if available + int numPoolConstraints = m_tmpSolverContactConstraintPool.size(); + for (j=0;j<numPoolConstraints;j++) + { + const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[j]]; + resolveSingleConstraintRowLowerLimitSIMD(*solveManifold.m_solverBodyA,*solveManifold.m_solverBodyB,solveManifold); + + } + ///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(*solveManifold.m_solverBodyA, *solveManifold.m_solverBodyB,solveManifold); + } + } + } else + { + + ///solve all joint constraints + for (j=0;j<m_tmpSolverNonContactConstraintPool.size();j++) + { + btSolverConstraint& constraint = m_tmpSolverNonContactConstraintPool[j]; + resolveSingleConstraintRowGeneric(*constraint.m_solverBodyA,*constraint.m_solverBodyB,constraint); + } + + for (j=0;j<numConstraints;j++) + { + constraints[j]->solveConstraintObsolete(constraints[j]->getRigidBodyA(),constraints[j]->getRigidBodyB(),infoGlobal.m_timeStep); + } + ///solve all contact constraints + int numPoolConstraints = m_tmpSolverContactConstraintPool.size(); + for (j=0;j<numPoolConstraints;j++) + { + const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[m_orderTmpConstraintPool[j]]; + resolveSingleConstraintRowLowerLimit(*solveManifold.m_solverBodyA,*solveManifold.m_solverBodyB,solveManifold); + } + ///solve all friction constraints + 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; + + resolveSingleConstraintRowGeneric(*solveManifold.m_solverBodyA,*solveManifold.m_solverBodyB,solveManifold); + } + } + } + return 0.f; +} + + +void btSequentialImpulseConstraintSolver::solveGroupCacheFriendlySplitImpulseIterations(btCollisionObject** bodies,int numBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer,btStackAlloc* stackAlloc) +{ + 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(*solveManifold.m_solverBodyA,*solveManifold.m_solverBodyB,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(*solveManifold.m_solverBodyA,*solveManifold.m_solverBodyB,solveManifold); + } + } + } + } + } +} + +btScalar btSequentialImpulseConstraintSolver::solveGroupCacheFriendlyIterations(btCollisionObject** bodies ,int numBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer,btStackAlloc* stackAlloc) +{ + BT_PROFILE("solveGroupCacheFriendlyIterations"); + + + //should traverse the contacts random order... + int iteration; + { + for ( iteration = 0;iteration<infoGlobal.m_numIterations;iteration++) + { + solveSingleIteration(iteration, bodies ,numBodies,manifoldPtr, numManifolds,constraints,numConstraints,infoGlobal,debugDrawer,stackAlloc); + } + + solveGroupCacheFriendlySplitImpulseIterations(bodies ,numBodies,manifoldPtr, numManifolds,constraints,numConstraints,infoGlobal,debugDrawer,stackAlloc); + } + return 0.f; +} + +btScalar btSequentialImpulseConstraintSolver::solveGroupCacheFriendlyFinish(btCollisionObject** bodies ,int numBodies,btPersistentManifold** /*manifoldPtr*/, int /*numManifolds*/,btTypedConstraint** /*constraints*/,int /* numConstraints*/,const btContactSolverInfo& infoGlobal,btIDebugDraw* /*debugDrawer*/,btStackAlloc* /*stackAlloc*/) +{ + int numPoolConstraints = m_tmpSolverContactConstraintPool.size(); + int i,j; + + for (j=0;j<numPoolConstraints;j++) + { + + const btSolverConstraint& solveManifold = m_tmpSolverContactConstraintPool[j]; + btManifoldPoint* pt = (btManifoldPoint*) solveManifold.m_originalContactPoint; + btAssert(pt); + pt->m_appliedImpulse = solveManifold.m_appliedImpulse; + if (infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) + { + pt->m_appliedImpulseLateral1 = m_tmpSolverContactFrictionConstraintPool[solveManifold.m_frictionIndex].m_appliedImpulse; + 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; + btScalar sum = constr->internalGetAppliedImpulse(); + sum += solverConstr.m_appliedImpulse; + constr->internalSetAppliedImpulse(sum); + } + + + if (infoGlobal.m_splitImpulse) + { + for ( i=0;i<numBodies;i++) + { + btRigidBody* body = btRigidBody::upcast(bodies[i]); + if (body) + body->internalWritebackVelocity(infoGlobal.m_timeStep); + } + } else + { + for ( i=0;i<numBodies;i++) + { + btRigidBody* body = btRigidBody::upcast(bodies[i]); + if (body) + body->internalWritebackVelocity(); + } + } + + + m_tmpSolverContactConstraintPool.resize(0); + m_tmpSolverNonContactConstraintPool.resize(0); + m_tmpSolverContactFrictionConstraintPool.resize(0); + + return 0.f; +} + + + +/// btSequentialImpulseConstraintSolver Sequentially applies impulses +btScalar btSequentialImpulseConstraintSolver::solveGroup(btCollisionObject** bodies,int numBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer,btStackAlloc* stackAlloc,btDispatcher* /*dispatcher*/) +{ + + BT_PROFILE("solveGroup"); + //you need to provide at least some bodies + btAssert(bodies); + btAssert(numBodies); + + solveGroupCacheFriendlySetup( bodies, numBodies, manifoldPtr, numManifolds,constraints, numConstraints,infoGlobal,debugDrawer, stackAlloc); + + solveGroupCacheFriendlyIterations(bodies, numBodies, manifoldPtr, numManifolds,constraints, numConstraints,infoGlobal,debugDrawer, stackAlloc); + + solveGroupCacheFriendlyFinish(bodies, numBodies, manifoldPtr, numManifolds,constraints, numConstraints,infoGlobal,debugDrawer, stackAlloc); + + return 0.f; +} + +void btSequentialImpulseConstraintSolver::reset() +{ + m_btSeed2 = 0; +} + + |