[1963] | 1 | /* |
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| 2 | Bullet Continuous Collision Detection and Physics Library |
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| 3 | Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ |
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| 4 | |
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| 5 | This software is provided 'as-is', without any express or implied warranty. |
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| 6 | In no event will the authors be held liable for any damages arising from the use of this software. |
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| 7 | Permission is granted to anyone to use this software for any purpose, |
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| 8 | including commercial applications, and to alter it and redistribute it freely, |
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| 9 | subject to the following restrictions: |
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| 10 | |
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| 11 | 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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| 12 | 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. |
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| 13 | 3. This notice may not be removed or altered from any source distribution. |
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| 14 | */ |
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| 15 | |
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| 16 | //#define COMPUTE_IMPULSE_DENOM 1 |
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| 17 | //It is not necessary (redundant) to refresh contact manifolds, this refresh has been moved to the collision algorithms. |
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| 18 | //#define FORCE_REFESH_CONTACT_MANIFOLDS 1 |
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| 19 | |
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| 20 | #include "btSequentialImpulseConstraintSolver.h" |
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| 21 | #include "BulletCollision/NarrowPhaseCollision/btPersistentManifold.h" |
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| 22 | #include "BulletDynamics/Dynamics/btRigidBody.h" |
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| 23 | #include "btContactConstraint.h" |
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| 24 | #include "btSolve2LinearConstraint.h" |
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| 25 | #include "btContactSolverInfo.h" |
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| 26 | #include "LinearMath/btIDebugDraw.h" |
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| 27 | #include "btJacobianEntry.h" |
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| 28 | #include "LinearMath/btMinMax.h" |
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| 29 | #include "BulletDynamics/ConstraintSolver/btTypedConstraint.h" |
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| 30 | #include <new> |
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| 31 | #include "LinearMath/btStackAlloc.h" |
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| 32 | #include "LinearMath/btQuickprof.h" |
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| 33 | #include "btSolverBody.h" |
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| 34 | #include "btSolverConstraint.h" |
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| 35 | |
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| 36 | |
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| 37 | #include "LinearMath/btAlignedObjectArray.h" |
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| 38 | |
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| 39 | |
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| 40 | int totalCpd = 0; |
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| 41 | |
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| 42 | int gTotalContactPoints = 0; |
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| 43 | |
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| 44 | struct btOrderIndex |
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| 45 | { |
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| 46 | int m_manifoldIndex; |
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| 47 | int m_pointIndex; |
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| 48 | }; |
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| 49 | |
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| 50 | |
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| 51 | |
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| 52 | #define SEQUENTIAL_IMPULSE_MAX_SOLVER_POINTS 16384 |
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| 53 | static btOrderIndex gOrder[SEQUENTIAL_IMPULSE_MAX_SOLVER_POINTS]; |
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| 54 | |
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| 55 | |
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| 56 | unsigned long btSequentialImpulseConstraintSolver::btRand2() |
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| 57 | { |
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| 58 | m_btSeed2 = (1664525L*m_btSeed2 + 1013904223L) & 0xffffffff; |
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| 59 | return m_btSeed2; |
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| 60 | } |
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| 61 | |
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| 62 | |
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| 63 | |
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| 64 | //See ODE: adam's all-int straightforward(?) dRandInt (0..n-1) |
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| 65 | int btSequentialImpulseConstraintSolver::btRandInt2 (int n) |
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| 66 | { |
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| 67 | // seems good; xor-fold and modulus |
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| 68 | const unsigned long un = static_cast<unsigned long>(n); |
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| 69 | unsigned long r = btRand2(); |
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| 70 | |
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| 71 | // note: probably more aggressive than it needs to be -- might be |
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| 72 | // able to get away without one or two of the innermost branches. |
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| 73 | if (un <= 0x00010000UL) { |
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| 74 | r ^= (r >> 16); |
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| 75 | if (un <= 0x00000100UL) { |
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| 76 | r ^= (r >> 8); |
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| 77 | if (un <= 0x00000010UL) { |
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| 78 | r ^= (r >> 4); |
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| 79 | if (un <= 0x00000004UL) { |
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| 80 | r ^= (r >> 2); |
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| 81 | if (un <= 0x00000002UL) { |
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| 82 | r ^= (r >> 1); |
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| 83 | } |
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| 84 | } |
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| 85 | } |
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| 86 | } |
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| 87 | } |
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| 88 | |
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| 89 | return (int) (r % un); |
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| 90 | } |
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| 91 | |
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| 92 | |
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| 93 | |
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| 94 | |
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| 95 | bool MyContactDestroyedCallback(void* userPersistentData); |
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| 96 | bool MyContactDestroyedCallback(void* userPersistentData) |
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| 97 | { |
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| 98 | assert (userPersistentData); |
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| 99 | btConstraintPersistentData* cpd = (btConstraintPersistentData*)userPersistentData; |
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| 100 | btAlignedFree(cpd); |
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| 101 | totalCpd--; |
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| 102 | //printf("totalCpd = %i. DELETED Ptr %x\n",totalCpd,userPersistentData); |
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| 103 | return true; |
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| 104 | } |
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| 105 | |
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| 106 | |
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| 107 | |
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| 108 | btSequentialImpulseConstraintSolver::btSequentialImpulseConstraintSolver() |
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| 109 | :m_btSeed2(0) |
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| 110 | { |
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| 111 | gContactDestroyedCallback = &MyContactDestroyedCallback; |
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| 112 | |
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| 113 | //initialize default friction/contact funcs |
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| 114 | int i,j; |
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| 115 | for (i=0;i<MAX_CONTACT_SOLVER_TYPES;i++) |
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| 116 | for (j=0;j<MAX_CONTACT_SOLVER_TYPES;j++) |
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| 117 | { |
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| 118 | |
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| 119 | m_contactDispatch[i][j] = resolveSingleCollision; |
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| 120 | m_frictionDispatch[i][j] = resolveSingleFriction; |
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| 121 | } |
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| 122 | } |
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| 123 | |
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| 124 | btSequentialImpulseConstraintSolver::~btSequentialImpulseConstraintSolver() |
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| 125 | { |
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| 126 | |
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| 127 | } |
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| 128 | |
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| 129 | void initSolverBody(btSolverBody* solverBody, btCollisionObject* collisionObject); |
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| 130 | void initSolverBody(btSolverBody* solverBody, btCollisionObject* collisionObject) |
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| 131 | { |
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| 132 | btRigidBody* rb = btRigidBody::upcast(collisionObject); |
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| 133 | if (rb) |
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| 134 | { |
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| 135 | solverBody->m_angularVelocity = rb->getAngularVelocity() ; |
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| 136 | solverBody->m_centerOfMassPosition = collisionObject->getWorldTransform().getOrigin(); |
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| 137 | solverBody->m_friction = collisionObject->getFriction(); |
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| 138 | solverBody->m_invMass = rb->getInvMass(); |
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| 139 | solverBody->m_linearVelocity = rb->getLinearVelocity(); |
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| 140 | solverBody->m_originalBody = rb; |
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| 141 | solverBody->m_angularFactor = rb->getAngularFactor(); |
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| 142 | } else |
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| 143 | { |
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| 144 | solverBody->m_angularVelocity.setValue(0,0,0); |
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| 145 | solverBody->m_centerOfMassPosition = collisionObject->getWorldTransform().getOrigin(); |
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| 146 | solverBody->m_friction = collisionObject->getFriction(); |
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| 147 | solverBody->m_invMass = 0.f; |
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| 148 | solverBody->m_linearVelocity.setValue(0,0,0); |
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| 149 | solverBody->m_originalBody = 0; |
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| 150 | solverBody->m_angularFactor = 1.f; |
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| 151 | } |
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| 152 | solverBody->m_pushVelocity.setValue(0.f,0.f,0.f); |
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| 153 | solverBody->m_turnVelocity.setValue(0.f,0.f,0.f); |
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| 154 | } |
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| 155 | |
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| 156 | |
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| 157 | int gNumSplitImpulseRecoveries = 0; |
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| 158 | |
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| 159 | btScalar restitutionCurve(btScalar rel_vel, btScalar restitution); |
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| 160 | btScalar restitutionCurve(btScalar rel_vel, btScalar restitution) |
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| 161 | { |
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| 162 | btScalar rest = restitution * -rel_vel; |
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| 163 | return rest; |
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| 164 | } |
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| 165 | |
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| 166 | |
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| 167 | void resolveSplitPenetrationImpulseCacheFriendly( |
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| 168 | btSolverBody& body1, |
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| 169 | btSolverBody& body2, |
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| 170 | const btSolverConstraint& contactConstraint, |
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| 171 | const btContactSolverInfo& solverInfo); |
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| 172 | |
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| 173 | //SIMD_FORCE_INLINE |
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| 174 | void resolveSplitPenetrationImpulseCacheFriendly( |
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| 175 | btSolverBody& body1, |
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| 176 | btSolverBody& body2, |
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| 177 | const btSolverConstraint& contactConstraint, |
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| 178 | const btContactSolverInfo& solverInfo) |
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| 179 | { |
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| 180 | (void)solverInfo; |
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| 181 | |
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| 182 | if (contactConstraint.m_penetration < solverInfo.m_splitImpulsePenetrationThreshold) |
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| 183 | { |
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| 184 | |
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| 185 | gNumSplitImpulseRecoveries++; |
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| 186 | btScalar normalImpulse; |
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| 187 | |
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| 188 | // Optimized version of projected relative velocity, use precomputed cross products with normal |
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| 189 | // body1.getVelocityInLocalPoint(contactConstraint.m_rel_posA,vel1); |
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| 190 | // body2.getVelocityInLocalPoint(contactConstraint.m_rel_posB,vel2); |
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| 191 | // btVector3 vel = vel1 - vel2; |
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| 192 | // btScalar rel_vel = contactConstraint.m_contactNormal.dot(vel); |
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| 193 | |
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| 194 | btScalar rel_vel; |
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| 195 | btScalar vel1Dotn = contactConstraint.m_contactNormal.dot(body1.m_pushVelocity) |
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| 196 | + contactConstraint.m_relpos1CrossNormal.dot(body1.m_turnVelocity); |
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| 197 | btScalar vel2Dotn = contactConstraint.m_contactNormal.dot(body2.m_pushVelocity) |
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| 198 | + contactConstraint.m_relpos2CrossNormal.dot(body2.m_turnVelocity); |
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| 199 | |
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| 200 | rel_vel = vel1Dotn-vel2Dotn; |
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| 201 | |
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| 202 | |
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| 203 | btScalar positionalError = -contactConstraint.m_penetration * solverInfo.m_erp2/solverInfo.m_timeStep; |
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| 204 | // btScalar positionalError = contactConstraint.m_penetration; |
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| 205 | |
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| 206 | btScalar velocityError = contactConstraint.m_restitution - rel_vel;// * damping; |
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| 207 | |
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| 208 | btScalar penetrationImpulse = positionalError * contactConstraint.m_jacDiagABInv; |
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| 209 | btScalar velocityImpulse = velocityError * contactConstraint.m_jacDiagABInv; |
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| 210 | normalImpulse = penetrationImpulse+velocityImpulse; |
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| 211 | |
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| 212 | // See Erin Catto's GDC 2006 paper: Clamp the accumulated impulse |
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| 213 | btScalar oldNormalImpulse = contactConstraint.m_appliedPushImpulse; |
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| 214 | btScalar sum = oldNormalImpulse + normalImpulse; |
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| 215 | contactConstraint.m_appliedPushImpulse = btScalar(0.) > sum ? btScalar(0.): sum; |
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| 216 | |
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| 217 | normalImpulse = contactConstraint.m_appliedPushImpulse - oldNormalImpulse; |
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| 218 | |
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| 219 | body1.internalApplyPushImpulse(contactConstraint.m_contactNormal*body1.m_invMass, contactConstraint.m_angularComponentA,normalImpulse); |
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| 220 | |
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| 221 | body2.internalApplyPushImpulse(contactConstraint.m_contactNormal*body2.m_invMass, contactConstraint.m_angularComponentB,-normalImpulse); |
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| 222 | |
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| 223 | } |
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| 224 | |
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| 225 | } |
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| 226 | |
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| 227 | |
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| 228 | //velocity + friction |
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| 229 | //response between two dynamic objects with friction |
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| 230 | |
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| 231 | btScalar resolveSingleCollisionCombinedCacheFriendly( |
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| 232 | btSolverBody& body1, |
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| 233 | btSolverBody& body2, |
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| 234 | const btSolverConstraint& contactConstraint, |
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| 235 | const btContactSolverInfo& solverInfo); |
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| 236 | |
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| 237 | //SIMD_FORCE_INLINE |
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| 238 | btScalar resolveSingleCollisionCombinedCacheFriendly( |
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| 239 | btSolverBody& body1, |
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| 240 | btSolverBody& body2, |
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| 241 | const btSolverConstraint& contactConstraint, |
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| 242 | const btContactSolverInfo& solverInfo) |
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| 243 | { |
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| 244 | (void)solverInfo; |
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| 245 | |
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| 246 | btScalar normalImpulse; |
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| 247 | |
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| 248 | { |
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| 249 | |
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| 250 | |
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| 251 | // Optimized version of projected relative velocity, use precomputed cross products with normal |
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| 252 | // body1.getVelocityInLocalPoint(contactConstraint.m_rel_posA,vel1); |
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| 253 | // body2.getVelocityInLocalPoint(contactConstraint.m_rel_posB,vel2); |
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| 254 | // btVector3 vel = vel1 - vel2; |
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| 255 | // btScalar rel_vel = contactConstraint.m_contactNormal.dot(vel); |
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| 256 | |
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| 257 | btScalar rel_vel; |
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| 258 | btScalar vel1Dotn = contactConstraint.m_contactNormal.dot(body1.m_linearVelocity) |
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| 259 | + contactConstraint.m_relpos1CrossNormal.dot(body1.m_angularVelocity); |
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| 260 | btScalar vel2Dotn = contactConstraint.m_contactNormal.dot(body2.m_linearVelocity) |
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| 261 | + contactConstraint.m_relpos2CrossNormal.dot(body2.m_angularVelocity); |
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| 262 | |
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| 263 | rel_vel = vel1Dotn-vel2Dotn; |
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| 264 | |
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| 265 | btScalar positionalError = 0.f; |
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| 266 | if (!solverInfo.m_splitImpulse || (contactConstraint.m_penetration > solverInfo.m_splitImpulsePenetrationThreshold)) |
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| 267 | { |
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| 268 | positionalError = -contactConstraint.m_penetration * solverInfo.m_erp/solverInfo.m_timeStep; |
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| 269 | } |
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| 270 | |
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| 271 | btScalar velocityError = contactConstraint.m_restitution - rel_vel;// * damping; |
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| 272 | |
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| 273 | btScalar penetrationImpulse = positionalError * contactConstraint.m_jacDiagABInv; |
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| 274 | btScalar velocityImpulse = velocityError * contactConstraint.m_jacDiagABInv; |
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| 275 | normalImpulse = penetrationImpulse+velocityImpulse; |
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| 276 | |
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| 277 | |
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| 278 | // See Erin Catto's GDC 2006 paper: Clamp the accumulated impulse |
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| 279 | btScalar oldNormalImpulse = contactConstraint.m_appliedImpulse; |
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| 280 | btScalar sum = oldNormalImpulse + normalImpulse; |
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| 281 | contactConstraint.m_appliedImpulse = btScalar(0.) > sum ? btScalar(0.): sum; |
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| 282 | |
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| 283 | normalImpulse = contactConstraint.m_appliedImpulse - oldNormalImpulse; |
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| 284 | |
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| 285 | body1.internalApplyImpulse(contactConstraint.m_contactNormal*body1.m_invMass, |
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| 286 | contactConstraint.m_angularComponentA,normalImpulse); |
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| 287 | |
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| 288 | body2.internalApplyImpulse(contactConstraint.m_contactNormal*body2.m_invMass, |
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| 289 | contactConstraint.m_angularComponentB,-normalImpulse); |
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| 290 | } |
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| 291 | |
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| 292 | return normalImpulse; |
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| 293 | } |
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| 294 | |
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| 295 | |
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| 296 | #ifndef NO_FRICTION_TANGENTIALS |
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| 297 | |
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| 298 | btScalar resolveSingleFrictionCacheFriendly( |
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| 299 | btSolverBody& body1, |
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| 300 | btSolverBody& body2, |
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| 301 | const btSolverConstraint& contactConstraint, |
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| 302 | const btContactSolverInfo& solverInfo, |
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| 303 | btScalar appliedNormalImpulse); |
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| 304 | |
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| 305 | //SIMD_FORCE_INLINE |
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| 306 | btScalar resolveSingleFrictionCacheFriendly( |
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| 307 | btSolverBody& body1, |
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| 308 | btSolverBody& body2, |
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| 309 | const btSolverConstraint& contactConstraint, |
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| 310 | const btContactSolverInfo& solverInfo, |
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| 311 | btScalar appliedNormalImpulse) |
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| 312 | { |
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| 313 | (void)solverInfo; |
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| 314 | |
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| 315 | |
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| 316 | const btScalar combinedFriction = contactConstraint.m_friction; |
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| 317 | |
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| 318 | const btScalar limit = appliedNormalImpulse * combinedFriction; |
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| 319 | |
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| 320 | if (appliedNormalImpulse>btScalar(0.)) |
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| 321 | //friction |
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| 322 | { |
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| 323 | |
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| 324 | btScalar j1; |
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| 325 | { |
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| 326 | |
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| 327 | btScalar rel_vel; |
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| 328 | const btScalar vel1Dotn = contactConstraint.m_contactNormal.dot(body1.m_linearVelocity) |
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| 329 | + contactConstraint.m_relpos1CrossNormal.dot(body1.m_angularVelocity); |
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| 330 | const btScalar vel2Dotn = contactConstraint.m_contactNormal.dot(body2.m_linearVelocity) |
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| 331 | + contactConstraint.m_relpos2CrossNormal.dot(body2.m_angularVelocity); |
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| 332 | rel_vel = vel1Dotn-vel2Dotn; |
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| 333 | |
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| 334 | // calculate j that moves us to zero relative velocity |
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| 335 | j1 = -rel_vel * contactConstraint.m_jacDiagABInv; |
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| 336 | #define CLAMP_ACCUMULATED_FRICTION_IMPULSE 1 |
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| 337 | #ifdef CLAMP_ACCUMULATED_FRICTION_IMPULSE |
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| 338 | btScalar oldTangentImpulse = contactConstraint.m_appliedImpulse; |
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| 339 | contactConstraint.m_appliedImpulse = oldTangentImpulse + j1; |
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| 340 | |
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| 341 | if (limit < contactConstraint.m_appliedImpulse) |
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| 342 | { |
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| 343 | contactConstraint.m_appliedImpulse = limit; |
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| 344 | } else |
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| 345 | { |
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| 346 | if (contactConstraint.m_appliedImpulse < -limit) |
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| 347 | contactConstraint.m_appliedImpulse = -limit; |
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| 348 | } |
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| 349 | j1 = contactConstraint.m_appliedImpulse - oldTangentImpulse; |
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| 350 | #else |
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| 351 | if (limit < j1) |
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| 352 | { |
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| 353 | j1 = limit; |
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| 354 | } else |
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| 355 | { |
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| 356 | if (j1 < -limit) |
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| 357 | j1 = -limit; |
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| 358 | } |
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| 359 | |
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| 360 | #endif //CLAMP_ACCUMULATED_FRICTION_IMPULSE |
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| 361 | |
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| 362 | //GEN_set_min(contactConstraint.m_appliedImpulse, limit); |
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| 363 | //GEN_set_max(contactConstraint.m_appliedImpulse, -limit); |
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| 364 | |
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| 365 | |
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| 366 | |
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| 367 | } |
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| 368 | |
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| 369 | body1.internalApplyImpulse(contactConstraint.m_contactNormal*body1.m_invMass,contactConstraint.m_angularComponentA,j1); |
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| 370 | |
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| 371 | body2.internalApplyImpulse(contactConstraint.m_contactNormal*body2.m_invMass,contactConstraint.m_angularComponentB,-j1); |
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| 372 | |
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| 373 | } |
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| 374 | return 0.f; |
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| 375 | } |
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| 376 | |
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| 377 | |
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| 378 | #else |
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| 379 | |
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| 380 | //velocity + friction |
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| 381 | //response between two dynamic objects with friction |
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| 382 | btScalar resolveSingleFrictionCacheFriendly( |
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| 383 | btSolverBody& body1, |
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| 384 | btSolverBody& body2, |
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| 385 | btSolverConstraint& contactConstraint, |
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| 386 | const btContactSolverInfo& solverInfo) |
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| 387 | { |
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| 388 | |
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| 389 | btVector3 vel1; |
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| 390 | btVector3 vel2; |
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| 391 | btScalar normalImpulse(0.f); |
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| 392 | |
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| 393 | { |
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| 394 | const btVector3& normal = contactConstraint.m_contactNormal; |
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| 395 | if (contactConstraint.m_penetration < 0.f) |
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| 396 | return 0.f; |
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| 397 | |
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| 398 | |
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| 399 | body1.getVelocityInLocalPoint(contactConstraint.m_rel_posA,vel1); |
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| 400 | body2.getVelocityInLocalPoint(contactConstraint.m_rel_posB,vel2); |
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| 401 | btVector3 vel = vel1 - vel2; |
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| 402 | btScalar rel_vel; |
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| 403 | rel_vel = normal.dot(vel); |
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| 404 | |
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| 405 | btVector3 lat_vel = vel - normal * rel_vel; |
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| 406 | btScalar lat_rel_vel = lat_vel.length2(); |
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| 407 | |
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| 408 | btScalar combinedFriction = contactConstraint.m_friction; |
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| 409 | const btVector3& rel_pos1 = contactConstraint.m_rel_posA; |
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| 410 | const btVector3& rel_pos2 = contactConstraint.m_rel_posB; |
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| 411 | |
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| 412 | |
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| 413 | if (lat_rel_vel > SIMD_EPSILON*SIMD_EPSILON) |
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| 414 | { |
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| 415 | lat_rel_vel = btSqrt(lat_rel_vel); |
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| 416 | |
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| 417 | lat_vel /= lat_rel_vel; |
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| 418 | btVector3 temp1 = body1.m_invInertiaWorld * rel_pos1.cross(lat_vel); |
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| 419 | btVector3 temp2 = body2.m_invInertiaWorld * rel_pos2.cross(lat_vel); |
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| 420 | btScalar friction_impulse = lat_rel_vel / |
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| 421 | (body1.m_invMass + body2.m_invMass + lat_vel.dot(temp1.cross(rel_pos1) + temp2.cross(rel_pos2))); |
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| 422 | btScalar normal_impulse = contactConstraint.m_appliedImpulse * combinedFriction; |
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| 423 | |
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| 424 | GEN_set_min(friction_impulse, normal_impulse); |
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| 425 | GEN_set_max(friction_impulse, -normal_impulse); |
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| 426 | body1.applyImpulse(lat_vel * -friction_impulse, rel_pos1); |
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| 427 | body2.applyImpulse(lat_vel * friction_impulse, rel_pos2); |
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| 428 | } |
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| 429 | } |
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| 430 | |
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| 431 | return normalImpulse; |
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| 432 | } |
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| 433 | |
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| 434 | #endif //NO_FRICTION_TANGENTIALS |
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| 435 | |
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| 436 | |
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| 437 | |
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| 438 | |
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| 439 | |
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[2430] | 440 | btSolverConstraint& btSequentialImpulseConstraintSolver::addFrictionConstraint(const btVector3& normalAxis,int solverBodyIdA,int solverBodyIdB,int frictionIndex,btManifoldPoint& cp,const btVector3& rel_pos1,const btVector3& rel_pos2,btCollisionObject* colObj0,btCollisionObject* colObj1, btScalar relaxation) |
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[1963] | 441 | { |
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| 442 | |
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| 443 | btRigidBody* body0=btRigidBody::upcast(colObj0); |
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| 444 | btRigidBody* body1=btRigidBody::upcast(colObj1); |
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| 445 | |
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| 446 | btSolverConstraint& solverConstraint = m_tmpSolverFrictionConstraintPool.expand(); |
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| 447 | solverConstraint.m_contactNormal = normalAxis; |
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| 448 | |
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| 449 | solverConstraint.m_solverBodyIdA = solverBodyIdA; |
---|
| 450 | solverConstraint.m_solverBodyIdB = solverBodyIdB; |
---|
| 451 | solverConstraint.m_constraintType = btSolverConstraint::BT_SOLVER_FRICTION_1D; |
---|
| 452 | solverConstraint.m_frictionIndex = frictionIndex; |
---|
| 453 | |
---|
| 454 | solverConstraint.m_friction = cp.m_combinedFriction; |
---|
| 455 | solverConstraint.m_originalContactPoint = 0; |
---|
| 456 | |
---|
| 457 | solverConstraint.m_appliedImpulse = btScalar(0.); |
---|
| 458 | solverConstraint.m_appliedPushImpulse = 0.f; |
---|
| 459 | solverConstraint.m_penetration = 0.f; |
---|
| 460 | { |
---|
| 461 | btVector3 ftorqueAxis1 = rel_pos1.cross(solverConstraint.m_contactNormal); |
---|
| 462 | solverConstraint.m_relpos1CrossNormal = ftorqueAxis1; |
---|
| 463 | solverConstraint.m_angularComponentA = body0 ? body0->getInvInertiaTensorWorld()*ftorqueAxis1 : btVector3(0,0,0); |
---|
| 464 | } |
---|
| 465 | { |
---|
| 466 | btVector3 ftorqueAxis1 = rel_pos2.cross(solverConstraint.m_contactNormal); |
---|
| 467 | solverConstraint.m_relpos2CrossNormal = ftorqueAxis1; |
---|
| 468 | solverConstraint.m_angularComponentB = body1 ? body1->getInvInertiaTensorWorld()*ftorqueAxis1 : btVector3(0,0,0); |
---|
| 469 | } |
---|
| 470 | |
---|
| 471 | #ifdef COMPUTE_IMPULSE_DENOM |
---|
| 472 | btScalar denom0 = rb0->computeImpulseDenominator(pos1,solverConstraint.m_contactNormal); |
---|
| 473 | btScalar denom1 = rb1->computeImpulseDenominator(pos2,solverConstraint.m_contactNormal); |
---|
| 474 | #else |
---|
| 475 | btVector3 vec; |
---|
| 476 | btScalar denom0 = 0.f; |
---|
| 477 | btScalar denom1 = 0.f; |
---|
| 478 | if (body0) |
---|
| 479 | { |
---|
| 480 | vec = ( solverConstraint.m_angularComponentA).cross(rel_pos1); |
---|
| 481 | denom0 = body0->getInvMass() + normalAxis.dot(vec); |
---|
| 482 | } |
---|
| 483 | if (body1) |
---|
| 484 | { |
---|
| 485 | vec = ( solverConstraint.m_angularComponentB).cross(rel_pos2); |
---|
| 486 | denom1 = body1->getInvMass() + normalAxis.dot(vec); |
---|
| 487 | } |
---|
| 488 | |
---|
| 489 | |
---|
| 490 | #endif //COMPUTE_IMPULSE_DENOM |
---|
| 491 | btScalar denom = relaxation/(denom0+denom1); |
---|
| 492 | solverConstraint.m_jacDiagABInv = denom; |
---|
| 493 | |
---|
[2430] | 494 | return solverConstraint; |
---|
[1963] | 495 | } |
---|
| 496 | |
---|
| 497 | |
---|
| 498 | |
---|
| 499 | btScalar btSequentialImpulseConstraintSolver::solveGroupCacheFriendlySetup(btCollisionObject** /*bodies */,int /*numBodies */,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer,btStackAlloc* stackAlloc) |
---|
| 500 | { |
---|
| 501 | BT_PROFILE("solveGroupCacheFriendlySetup"); |
---|
| 502 | (void)stackAlloc; |
---|
| 503 | (void)debugDrawer; |
---|
| 504 | |
---|
| 505 | |
---|
| 506 | if (!(numConstraints + numManifolds)) |
---|
| 507 | { |
---|
| 508 | // printf("empty\n"); |
---|
| 509 | return 0.f; |
---|
| 510 | } |
---|
| 511 | btPersistentManifold* manifold = 0; |
---|
| 512 | btCollisionObject* colObj0=0,*colObj1=0; |
---|
| 513 | |
---|
| 514 | //btRigidBody* rb0=0,*rb1=0; |
---|
| 515 | |
---|
| 516 | |
---|
| 517 | #ifdef FORCE_REFESH_CONTACT_MANIFOLDS |
---|
| 518 | |
---|
| 519 | BEGIN_PROFILE("refreshManifolds"); |
---|
| 520 | |
---|
| 521 | int i; |
---|
| 522 | |
---|
| 523 | |
---|
| 524 | |
---|
| 525 | for (i=0;i<numManifolds;i++) |
---|
| 526 | { |
---|
| 527 | manifold = manifoldPtr[i]; |
---|
| 528 | rb1 = (btRigidBody*)manifold->getBody1(); |
---|
| 529 | rb0 = (btRigidBody*)manifold->getBody0(); |
---|
| 530 | |
---|
| 531 | manifold->refreshContactPoints(rb0->getCenterOfMassTransform(),rb1->getCenterOfMassTransform()); |
---|
| 532 | |
---|
| 533 | } |
---|
| 534 | |
---|
| 535 | END_PROFILE("refreshManifolds"); |
---|
| 536 | #endif //FORCE_REFESH_CONTACT_MANIFOLDS |
---|
| 537 | |
---|
| 538 | |
---|
| 539 | |
---|
| 540 | |
---|
| 541 | |
---|
| 542 | //int sizeofSB = sizeof(btSolverBody); |
---|
| 543 | //int sizeofSC = sizeof(btSolverConstraint); |
---|
| 544 | |
---|
| 545 | |
---|
| 546 | //if (1) |
---|
| 547 | { |
---|
| 548 | //if m_stackAlloc, try to pack bodies/constraints to speed up solving |
---|
| 549 | // btBlock* sablock; |
---|
| 550 | // sablock = stackAlloc->beginBlock(); |
---|
| 551 | |
---|
| 552 | // int memsize = 16; |
---|
| 553 | // unsigned char* stackMemory = stackAlloc->allocate(memsize); |
---|
| 554 | |
---|
| 555 | |
---|
| 556 | //todo: use stack allocator for this temp memory |
---|
| 557 | // int minReservation = numManifolds*2; |
---|
| 558 | |
---|
| 559 | //m_tmpSolverBodyPool.reserve(minReservation); |
---|
| 560 | |
---|
| 561 | //don't convert all bodies, only the one we need so solver the constraints |
---|
| 562 | /* |
---|
| 563 | { |
---|
| 564 | for (int i=0;i<numBodies;i++) |
---|
| 565 | { |
---|
| 566 | btRigidBody* rb = btRigidBody::upcast(bodies[i]); |
---|
| 567 | if (rb && (rb->getIslandTag() >= 0)) |
---|
| 568 | { |
---|
| 569 | btAssert(rb->getCompanionId() < 0); |
---|
| 570 | int solverBodyId = m_tmpSolverBodyPool.size(); |
---|
| 571 | btSolverBody& solverBody = m_tmpSolverBodyPool.expand(); |
---|
| 572 | initSolverBody(&solverBody,rb); |
---|
| 573 | rb->setCompanionId(solverBodyId); |
---|
| 574 | } |
---|
| 575 | } |
---|
| 576 | } |
---|
| 577 | */ |
---|
| 578 | |
---|
| 579 | //m_tmpSolverConstraintPool.reserve(minReservation); |
---|
| 580 | //m_tmpSolverFrictionConstraintPool.reserve(minReservation); |
---|
| 581 | |
---|
| 582 | { |
---|
| 583 | int i; |
---|
| 584 | |
---|
| 585 | for (i=0;i<numManifolds;i++) |
---|
| 586 | { |
---|
| 587 | manifold = manifoldPtr[i]; |
---|
| 588 | colObj0 = (btCollisionObject*)manifold->getBody0(); |
---|
| 589 | colObj1 = (btCollisionObject*)manifold->getBody1(); |
---|
| 590 | |
---|
| 591 | int solverBodyIdA=-1; |
---|
| 592 | int solverBodyIdB=-1; |
---|
| 593 | |
---|
| 594 | if (manifold->getNumContacts()) |
---|
| 595 | { |
---|
| 596 | |
---|
| 597 | |
---|
| 598 | |
---|
| 599 | if (colObj0->getIslandTag() >= 0) |
---|
| 600 | { |
---|
| 601 | if (colObj0->getCompanionId() >= 0) |
---|
| 602 | { |
---|
| 603 | //body has already been converted |
---|
| 604 | solverBodyIdA = colObj0->getCompanionId(); |
---|
| 605 | } else |
---|
| 606 | { |
---|
| 607 | solverBodyIdA = m_tmpSolverBodyPool.size(); |
---|
| 608 | btSolverBody& solverBody = m_tmpSolverBodyPool.expand(); |
---|
| 609 | initSolverBody(&solverBody,colObj0); |
---|
| 610 | colObj0->setCompanionId(solverBodyIdA); |
---|
| 611 | } |
---|
| 612 | } else |
---|
| 613 | { |
---|
| 614 | //create a static body |
---|
| 615 | solverBodyIdA = m_tmpSolverBodyPool.size(); |
---|
| 616 | btSolverBody& solverBody = m_tmpSolverBodyPool.expand(); |
---|
| 617 | initSolverBody(&solverBody,colObj0); |
---|
| 618 | } |
---|
| 619 | |
---|
| 620 | if (colObj1->getIslandTag() >= 0) |
---|
| 621 | { |
---|
| 622 | if (colObj1->getCompanionId() >= 0) |
---|
| 623 | { |
---|
| 624 | solverBodyIdB = colObj1->getCompanionId(); |
---|
| 625 | } else |
---|
| 626 | { |
---|
| 627 | solverBodyIdB = m_tmpSolverBodyPool.size(); |
---|
| 628 | btSolverBody& solverBody = m_tmpSolverBodyPool.expand(); |
---|
| 629 | initSolverBody(&solverBody,colObj1); |
---|
| 630 | colObj1->setCompanionId(solverBodyIdB); |
---|
| 631 | } |
---|
| 632 | } else |
---|
| 633 | { |
---|
| 634 | //create a static body |
---|
| 635 | solverBodyIdB = m_tmpSolverBodyPool.size(); |
---|
| 636 | btSolverBody& solverBody = m_tmpSolverBodyPool.expand(); |
---|
| 637 | initSolverBody(&solverBody,colObj1); |
---|
| 638 | } |
---|
| 639 | } |
---|
| 640 | |
---|
| 641 | btVector3 rel_pos1; |
---|
| 642 | btVector3 rel_pos2; |
---|
| 643 | btScalar relaxation; |
---|
| 644 | |
---|
| 645 | for (int j=0;j<manifold->getNumContacts();j++) |
---|
| 646 | { |
---|
| 647 | |
---|
| 648 | btManifoldPoint& cp = manifold->getContactPoint(j); |
---|
| 649 | |
---|
| 650 | if (cp.getDistance() <= btScalar(0.)) |
---|
| 651 | { |
---|
| 652 | |
---|
| 653 | const btVector3& pos1 = cp.getPositionWorldOnA(); |
---|
| 654 | const btVector3& pos2 = cp.getPositionWorldOnB(); |
---|
| 655 | |
---|
| 656 | rel_pos1 = pos1 - colObj0->getWorldTransform().getOrigin(); |
---|
| 657 | rel_pos2 = pos2 - colObj1->getWorldTransform().getOrigin(); |
---|
| 658 | |
---|
| 659 | |
---|
| 660 | relaxation = 1.f; |
---|
| 661 | btScalar rel_vel; |
---|
| 662 | btVector3 vel; |
---|
| 663 | |
---|
| 664 | int frictionIndex = m_tmpSolverConstraintPool.size(); |
---|
| 665 | |
---|
| 666 | { |
---|
| 667 | btSolverConstraint& solverConstraint = m_tmpSolverConstraintPool.expand(); |
---|
| 668 | btRigidBody* rb0 = btRigidBody::upcast(colObj0); |
---|
| 669 | btRigidBody* rb1 = btRigidBody::upcast(colObj1); |
---|
| 670 | |
---|
| 671 | solverConstraint.m_solverBodyIdA = solverBodyIdA; |
---|
| 672 | solverConstraint.m_solverBodyIdB = solverBodyIdB; |
---|
| 673 | solverConstraint.m_constraintType = btSolverConstraint::BT_SOLVER_CONTACT_1D; |
---|
| 674 | |
---|
| 675 | solverConstraint.m_originalContactPoint = &cp; |
---|
| 676 | |
---|
| 677 | btVector3 torqueAxis0 = rel_pos1.cross(cp.m_normalWorldOnB); |
---|
| 678 | solverConstraint.m_angularComponentA = rb0 ? rb0->getInvInertiaTensorWorld()*torqueAxis0 : btVector3(0,0,0); |
---|
| 679 | btVector3 torqueAxis1 = rel_pos2.cross(cp.m_normalWorldOnB); |
---|
| 680 | solverConstraint.m_angularComponentB = rb1 ? rb1->getInvInertiaTensorWorld()*torqueAxis1 : btVector3(0,0,0); |
---|
| 681 | { |
---|
| 682 | #ifdef COMPUTE_IMPULSE_DENOM |
---|
| 683 | btScalar denom0 = rb0->computeImpulseDenominator(pos1,cp.m_normalWorldOnB); |
---|
| 684 | btScalar denom1 = rb1->computeImpulseDenominator(pos2,cp.m_normalWorldOnB); |
---|
| 685 | #else |
---|
| 686 | btVector3 vec; |
---|
| 687 | btScalar denom0 = 0.f; |
---|
| 688 | btScalar denom1 = 0.f; |
---|
| 689 | if (rb0) |
---|
| 690 | { |
---|
| 691 | vec = ( solverConstraint.m_angularComponentA).cross(rel_pos1); |
---|
| 692 | denom0 = rb0->getInvMass() + cp.m_normalWorldOnB.dot(vec); |
---|
| 693 | } |
---|
| 694 | if (rb1) |
---|
| 695 | { |
---|
| 696 | vec = ( solverConstraint.m_angularComponentB).cross(rel_pos2); |
---|
| 697 | denom1 = rb1->getInvMass() + cp.m_normalWorldOnB.dot(vec); |
---|
| 698 | } |
---|
| 699 | #endif //COMPUTE_IMPULSE_DENOM |
---|
| 700 | |
---|
| 701 | btScalar denom = relaxation/(denom0+denom1); |
---|
| 702 | solverConstraint.m_jacDiagABInv = denom; |
---|
| 703 | } |
---|
| 704 | |
---|
| 705 | solverConstraint.m_contactNormal = cp.m_normalWorldOnB; |
---|
| 706 | solverConstraint.m_relpos1CrossNormal = rel_pos1.cross(cp.m_normalWorldOnB); |
---|
| 707 | solverConstraint.m_relpos2CrossNormal = rel_pos2.cross(cp.m_normalWorldOnB); |
---|
| 708 | |
---|
| 709 | |
---|
| 710 | btVector3 vel1 = rb0 ? rb0->getVelocityInLocalPoint(rel_pos1) : btVector3(0,0,0); |
---|
| 711 | btVector3 vel2 = rb1 ? rb1->getVelocityInLocalPoint(rel_pos2) : btVector3(0,0,0); |
---|
| 712 | |
---|
| 713 | vel = vel1 - vel2; |
---|
| 714 | |
---|
| 715 | rel_vel = cp.m_normalWorldOnB.dot(vel); |
---|
| 716 | |
---|
| 717 | solverConstraint.m_penetration = btMin(cp.getDistance()+infoGlobal.m_linearSlop,btScalar(0.)); |
---|
| 718 | //solverConstraint.m_penetration = cp.getDistance(); |
---|
| 719 | |
---|
| 720 | solverConstraint.m_friction = cp.m_combinedFriction; |
---|
[2430] | 721 | |
---|
| 722 | |
---|
| 723 | if (cp.m_lifeTime>infoGlobal.m_restingContactRestitutionThreshold) |
---|
[1963] | 724 | { |
---|
| 725 | solverConstraint.m_restitution = 0.f; |
---|
[2430] | 726 | } else |
---|
| 727 | { |
---|
| 728 | solverConstraint.m_restitution = restitutionCurve(rel_vel, cp.m_combinedRestitution); |
---|
| 729 | if (solverConstraint.m_restitution <= btScalar(0.)) |
---|
| 730 | { |
---|
| 731 | solverConstraint.m_restitution = 0.f; |
---|
| 732 | }; |
---|
| 733 | } |
---|
[1963] | 734 | |
---|
| 735 | |
---|
| 736 | btScalar penVel = -solverConstraint.m_penetration/infoGlobal.m_timeStep; |
---|
| 737 | |
---|
| 738 | |
---|
| 739 | |
---|
| 740 | if (solverConstraint.m_restitution > penVel) |
---|
| 741 | { |
---|
| 742 | solverConstraint.m_penetration = btScalar(0.); |
---|
| 743 | } |
---|
| 744 | |
---|
| 745 | |
---|
| 746 | |
---|
| 747 | ///warm starting (or zero if disabled) |
---|
| 748 | if (infoGlobal.m_solverMode & SOLVER_USE_WARMSTARTING) |
---|
| 749 | { |
---|
| 750 | solverConstraint.m_appliedImpulse = cp.m_appliedImpulse * infoGlobal.m_warmstartingFactor; |
---|
| 751 | if (rb0) |
---|
| 752 | m_tmpSolverBodyPool[solverConstraint.m_solverBodyIdA].internalApplyImpulse(solverConstraint.m_contactNormal*rb0->getInvMass(),solverConstraint.m_angularComponentA,solverConstraint.m_appliedImpulse); |
---|
| 753 | if (rb1) |
---|
| 754 | m_tmpSolverBodyPool[solverConstraint.m_solverBodyIdB].internalApplyImpulse(solverConstraint.m_contactNormal*rb1->getInvMass(),solverConstraint.m_angularComponentB,-solverConstraint.m_appliedImpulse); |
---|
| 755 | } else |
---|
| 756 | { |
---|
| 757 | solverConstraint.m_appliedImpulse = 0.f; |
---|
| 758 | } |
---|
| 759 | |
---|
| 760 | solverConstraint.m_appliedPushImpulse = 0.f; |
---|
| 761 | |
---|
| 762 | solverConstraint.m_frictionIndex = m_tmpSolverFrictionConstraintPool.size(); |
---|
| 763 | if (!cp.m_lateralFrictionInitialized) |
---|
| 764 | { |
---|
| 765 | cp.m_lateralFrictionDir1 = vel - cp.m_normalWorldOnB * rel_vel; |
---|
| 766 | btScalar lat_rel_vel = cp.m_lateralFrictionDir1.length2(); |
---|
| 767 | if (lat_rel_vel > SIMD_EPSILON)//0.0f) |
---|
| 768 | { |
---|
| 769 | cp.m_lateralFrictionDir1 /= btSqrt(lat_rel_vel); |
---|
| 770 | addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); |
---|
[2430] | 771 | if(infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) |
---|
| 772 | { |
---|
| 773 | cp.m_lateralFrictionDir2 = cp.m_lateralFrictionDir1.cross(cp.m_normalWorldOnB); |
---|
| 774 | cp.m_lateralFrictionDir2.normalize();//?? |
---|
| 775 | addFrictionConstraint(cp.m_lateralFrictionDir2,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); |
---|
| 776 | cp.m_lateralFrictionInitialized = true; |
---|
| 777 | } |
---|
[1963] | 778 | } else |
---|
| 779 | { |
---|
| 780 | //re-calculate friction direction every frame, todo: check if this is really needed |
---|
| 781 | btPlaneSpace1(cp.m_normalWorldOnB,cp.m_lateralFrictionDir1,cp.m_lateralFrictionDir2); |
---|
| 782 | addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); |
---|
| 783 | addFrictionConstraint(cp.m_lateralFrictionDir2,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); |
---|
[2430] | 784 | if (infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) |
---|
| 785 | { |
---|
| 786 | cp.m_lateralFrictionInitialized = true; |
---|
| 787 | } |
---|
[1963] | 788 | } |
---|
| 789 | |
---|
| 790 | } else |
---|
| 791 | { |
---|
| 792 | addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); |
---|
[2430] | 793 | if (infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) |
---|
| 794 | addFrictionConstraint(cp.m_lateralFrictionDir2,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); |
---|
[1963] | 795 | } |
---|
| 796 | |
---|
[2430] | 797 | if (infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) |
---|
[1963] | 798 | { |
---|
| 799 | { |
---|
[2430] | 800 | btSolverConstraint& frictionConstraint1 = m_tmpSolverFrictionConstraintPool[solverConstraint.m_frictionIndex]; |
---|
| 801 | if (infoGlobal.m_solverMode & SOLVER_USE_WARMSTARTING) |
---|
| 802 | { |
---|
| 803 | frictionConstraint1.m_appliedImpulse = cp.m_appliedImpulseLateral1 * infoGlobal.m_warmstartingFactor; |
---|
| 804 | if (rb0) |
---|
| 805 | m_tmpSolverBodyPool[solverConstraint.m_solverBodyIdA].internalApplyImpulse(frictionConstraint1.m_contactNormal*rb0->getInvMass(),frictionConstraint1.m_angularComponentA,frictionConstraint1.m_appliedImpulse); |
---|
| 806 | if (rb1) |
---|
| 807 | m_tmpSolverBodyPool[solverConstraint.m_solverBodyIdB].internalApplyImpulse(frictionConstraint1.m_contactNormal*rb1->getInvMass(),frictionConstraint1.m_angularComponentB,-frictionConstraint1.m_appliedImpulse); |
---|
| 808 | } else |
---|
| 809 | { |
---|
| 810 | frictionConstraint1.m_appliedImpulse = 0.f; |
---|
| 811 | } |
---|
[1963] | 812 | } |
---|
| 813 | { |
---|
[2430] | 814 | btSolverConstraint& frictionConstraint2 = m_tmpSolverFrictionConstraintPool[solverConstraint.m_frictionIndex+1]; |
---|
| 815 | if (infoGlobal.m_solverMode & SOLVER_USE_WARMSTARTING) |
---|
| 816 | { |
---|
| 817 | frictionConstraint2.m_appliedImpulse = cp.m_appliedImpulseLateral2 * infoGlobal.m_warmstartingFactor; |
---|
| 818 | if (rb0) |
---|
| 819 | m_tmpSolverBodyPool[solverConstraint.m_solverBodyIdA].internalApplyImpulse(frictionConstraint2.m_contactNormal*rb0->getInvMass(),frictionConstraint2.m_angularComponentA,frictionConstraint2.m_appliedImpulse); |
---|
| 820 | if (rb1) |
---|
| 821 | m_tmpSolverBodyPool[solverConstraint.m_solverBodyIdB].internalApplyImpulse(frictionConstraint2.m_contactNormal*rb1->getInvMass(),frictionConstraint2.m_angularComponentB,-frictionConstraint2.m_appliedImpulse); |
---|
| 822 | } else |
---|
| 823 | { |
---|
| 824 | frictionConstraint2.m_appliedImpulse = 0.f; |
---|
| 825 | } |
---|
[1963] | 826 | } |
---|
| 827 | } |
---|
| 828 | } |
---|
| 829 | |
---|
| 830 | |
---|
| 831 | } |
---|
| 832 | } |
---|
| 833 | } |
---|
| 834 | } |
---|
| 835 | } |
---|
| 836 | |
---|
| 837 | btContactSolverInfo info = infoGlobal; |
---|
| 838 | |
---|
| 839 | { |
---|
| 840 | int j; |
---|
| 841 | for (j=0;j<numConstraints;j++) |
---|
| 842 | { |
---|
| 843 | btTypedConstraint* constraint = constraints[j]; |
---|
| 844 | constraint->buildJacobian(); |
---|
| 845 | } |
---|
| 846 | } |
---|
| 847 | |
---|
| 848 | |
---|
| 849 | |
---|
| 850 | int numConstraintPool = m_tmpSolverConstraintPool.size(); |
---|
| 851 | int numFrictionPool = m_tmpSolverFrictionConstraintPool.size(); |
---|
| 852 | |
---|
[2430] | 853 | ///@todo: use stack allocator for such temporarily memory, same for solver bodies/constraints |
---|
[1963] | 854 | m_orderTmpConstraintPool.resize(numConstraintPool); |
---|
| 855 | m_orderFrictionConstraintPool.resize(numFrictionPool); |
---|
| 856 | { |
---|
| 857 | int i; |
---|
| 858 | for (i=0;i<numConstraintPool;i++) |
---|
| 859 | { |
---|
| 860 | m_orderTmpConstraintPool[i] = i; |
---|
| 861 | } |
---|
| 862 | for (i=0;i<numFrictionPool;i++) |
---|
| 863 | { |
---|
| 864 | m_orderFrictionConstraintPool[i] = i; |
---|
| 865 | } |
---|
| 866 | } |
---|
| 867 | |
---|
| 868 | |
---|
| 869 | |
---|
| 870 | return 0.f; |
---|
| 871 | |
---|
| 872 | } |
---|
| 873 | |
---|
| 874 | btScalar btSequentialImpulseConstraintSolver::solveGroupCacheFriendlyIterations(btCollisionObject** /*bodies */,int /*numBodies*/,btPersistentManifold** /*manifoldPtr*/, int /*numManifolds*/,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* /*debugDrawer*/,btStackAlloc* /*stackAlloc*/) |
---|
| 875 | { |
---|
| 876 | BT_PROFILE("solveGroupCacheFriendlyIterations"); |
---|
| 877 | int numConstraintPool = m_tmpSolverConstraintPool.size(); |
---|
| 878 | int numFrictionPool = m_tmpSolverFrictionConstraintPool.size(); |
---|
| 879 | |
---|
| 880 | //should traverse the contacts random order... |
---|
| 881 | int iteration; |
---|
| 882 | { |
---|
| 883 | for ( iteration = 0;iteration<infoGlobal.m_numIterations;iteration++) |
---|
| 884 | { |
---|
| 885 | |
---|
| 886 | int j; |
---|
| 887 | if (infoGlobal.m_solverMode & SOLVER_RANDMIZE_ORDER) |
---|
| 888 | { |
---|
| 889 | if ((iteration & 7) == 0) { |
---|
| 890 | for (j=0; j<numConstraintPool; ++j) { |
---|
| 891 | int tmp = m_orderTmpConstraintPool[j]; |
---|
| 892 | int swapi = btRandInt2(j+1); |
---|
| 893 | m_orderTmpConstraintPool[j] = m_orderTmpConstraintPool[swapi]; |
---|
| 894 | m_orderTmpConstraintPool[swapi] = tmp; |
---|
| 895 | } |
---|
| 896 | |
---|
| 897 | for (j=0; j<numFrictionPool; ++j) { |
---|
| 898 | int tmp = m_orderFrictionConstraintPool[j]; |
---|
| 899 | int swapi = btRandInt2(j+1); |
---|
| 900 | m_orderFrictionConstraintPool[j] = m_orderFrictionConstraintPool[swapi]; |
---|
| 901 | m_orderFrictionConstraintPool[swapi] = tmp; |
---|
| 902 | } |
---|
| 903 | } |
---|
| 904 | } |
---|
| 905 | |
---|
| 906 | for (j=0;j<numConstraints;j++) |
---|
| 907 | { |
---|
| 908 | btTypedConstraint* constraint = constraints[j]; |
---|
| 909 | ///todo: use solver bodies, so we don't need to copy from/to btRigidBody |
---|
| 910 | |
---|
| 911 | if ((constraint->getRigidBodyA().getIslandTag() >= 0) && (constraint->getRigidBodyA().getCompanionId() >= 0)) |
---|
| 912 | { |
---|
| 913 | m_tmpSolverBodyPool[constraint->getRigidBodyA().getCompanionId()].writebackVelocity(); |
---|
| 914 | } |
---|
| 915 | if ((constraint->getRigidBodyB().getIslandTag() >= 0) && (constraint->getRigidBodyB().getCompanionId() >= 0)) |
---|
| 916 | { |
---|
| 917 | m_tmpSolverBodyPool[constraint->getRigidBodyB().getCompanionId()].writebackVelocity(); |
---|
| 918 | } |
---|
| 919 | |
---|
| 920 | constraint->solveConstraint(infoGlobal.m_timeStep); |
---|
| 921 | |
---|
| 922 | if ((constraint->getRigidBodyA().getIslandTag() >= 0) && (constraint->getRigidBodyA().getCompanionId() >= 0)) |
---|
| 923 | { |
---|
| 924 | m_tmpSolverBodyPool[constraint->getRigidBodyA().getCompanionId()].readVelocity(); |
---|
| 925 | } |
---|
| 926 | if ((constraint->getRigidBodyB().getIslandTag() >= 0) && (constraint->getRigidBodyB().getCompanionId() >= 0)) |
---|
| 927 | { |
---|
| 928 | m_tmpSolverBodyPool[constraint->getRigidBodyB().getCompanionId()].readVelocity(); |
---|
| 929 | } |
---|
| 930 | |
---|
| 931 | } |
---|
| 932 | |
---|
| 933 | { |
---|
| 934 | int numPoolConstraints = m_tmpSolverConstraintPool.size(); |
---|
| 935 | for (j=0;j<numPoolConstraints;j++) |
---|
| 936 | { |
---|
| 937 | |
---|
| 938 | const btSolverConstraint& solveManifold = m_tmpSolverConstraintPool[m_orderTmpConstraintPool[j]]; |
---|
| 939 | resolveSingleCollisionCombinedCacheFriendly(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA], |
---|
| 940 | m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold,infoGlobal); |
---|
| 941 | } |
---|
| 942 | } |
---|
| 943 | |
---|
| 944 | { |
---|
| 945 | int numFrictionPoolConstraints = m_tmpSolverFrictionConstraintPool.size(); |
---|
| 946 | |
---|
| 947 | for (j=0;j<numFrictionPoolConstraints;j++) |
---|
| 948 | { |
---|
| 949 | const btSolverConstraint& solveManifold = m_tmpSolverFrictionConstraintPool[m_orderFrictionConstraintPool[j]]; |
---|
| 950 | btScalar totalImpulse = m_tmpSolverConstraintPool[solveManifold.m_frictionIndex].m_appliedImpulse+ |
---|
| 951 | m_tmpSolverConstraintPool[solveManifold.m_frictionIndex].m_appliedPushImpulse; |
---|
| 952 | |
---|
| 953 | resolveSingleFrictionCacheFriendly(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA], |
---|
| 954 | m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold,infoGlobal, |
---|
| 955 | totalImpulse); |
---|
| 956 | } |
---|
| 957 | } |
---|
| 958 | |
---|
| 959 | |
---|
| 960 | |
---|
| 961 | } |
---|
| 962 | |
---|
| 963 | if (infoGlobal.m_splitImpulse) |
---|
| 964 | { |
---|
| 965 | |
---|
| 966 | for ( iteration = 0;iteration<infoGlobal.m_numIterations;iteration++) |
---|
| 967 | { |
---|
| 968 | { |
---|
| 969 | int numPoolConstraints = m_tmpSolverConstraintPool.size(); |
---|
| 970 | int j; |
---|
| 971 | for (j=0;j<numPoolConstraints;j++) |
---|
| 972 | { |
---|
| 973 | const btSolverConstraint& solveManifold = m_tmpSolverConstraintPool[m_orderTmpConstraintPool[j]]; |
---|
| 974 | |
---|
| 975 | resolveSplitPenetrationImpulseCacheFriendly(m_tmpSolverBodyPool[solveManifold.m_solverBodyIdA], |
---|
| 976 | m_tmpSolverBodyPool[solveManifold.m_solverBodyIdB],solveManifold,infoGlobal); |
---|
| 977 | } |
---|
| 978 | } |
---|
| 979 | } |
---|
| 980 | |
---|
| 981 | } |
---|
| 982 | |
---|
| 983 | } |
---|
| 984 | |
---|
| 985 | return 0.f; |
---|
| 986 | } |
---|
| 987 | |
---|
| 988 | |
---|
| 989 | btScalar btSequentialImpulseConstraintSolver::solveGroupCacheFriendly(btCollisionObject** bodies,int numBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer,btStackAlloc* stackAlloc) |
---|
| 990 | { |
---|
| 991 | int i; |
---|
| 992 | |
---|
| 993 | solveGroupCacheFriendlySetup( bodies, numBodies, manifoldPtr, numManifolds,constraints, numConstraints,infoGlobal,debugDrawer, stackAlloc); |
---|
| 994 | solveGroupCacheFriendlyIterations(bodies, numBodies, manifoldPtr, numManifolds,constraints, numConstraints,infoGlobal,debugDrawer, stackAlloc); |
---|
| 995 | |
---|
| 996 | int numPoolConstraints = m_tmpSolverConstraintPool.size(); |
---|
| 997 | int j; |
---|
| 998 | for (j=0;j<numPoolConstraints;j++) |
---|
| 999 | { |
---|
| 1000 | |
---|
| 1001 | const btSolverConstraint& solveManifold = m_tmpSolverConstraintPool[j]; |
---|
| 1002 | btManifoldPoint* pt = (btManifoldPoint*) solveManifold.m_originalContactPoint; |
---|
| 1003 | btAssert(pt); |
---|
| 1004 | pt->m_appliedImpulse = solveManifold.m_appliedImpulse; |
---|
[2430] | 1005 | if (infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) |
---|
| 1006 | { |
---|
| 1007 | pt->m_appliedImpulseLateral1 = m_tmpSolverFrictionConstraintPool[solveManifold.m_frictionIndex].m_appliedImpulse; |
---|
| 1008 | pt->m_appliedImpulseLateral2 = m_tmpSolverFrictionConstraintPool[solveManifold.m_frictionIndex+1].m_appliedImpulse; |
---|
| 1009 | } |
---|
[1963] | 1010 | |
---|
| 1011 | //do a callback here? |
---|
| 1012 | |
---|
| 1013 | } |
---|
| 1014 | |
---|
| 1015 | if (infoGlobal.m_splitImpulse) |
---|
| 1016 | { |
---|
| 1017 | for ( i=0;i<m_tmpSolverBodyPool.size();i++) |
---|
| 1018 | { |
---|
| 1019 | m_tmpSolverBodyPool[i].writebackVelocity(infoGlobal.m_timeStep); |
---|
| 1020 | } |
---|
| 1021 | } else |
---|
| 1022 | { |
---|
| 1023 | for ( i=0;i<m_tmpSolverBodyPool.size();i++) |
---|
| 1024 | { |
---|
| 1025 | m_tmpSolverBodyPool[i].writebackVelocity(); |
---|
| 1026 | } |
---|
| 1027 | } |
---|
| 1028 | |
---|
| 1029 | // printf("m_tmpSolverConstraintPool.size() = %i\n",m_tmpSolverConstraintPool.size()); |
---|
| 1030 | |
---|
| 1031 | /* |
---|
| 1032 | printf("m_tmpSolverBodyPool.size() = %i\n",m_tmpSolverBodyPool.size()); |
---|
| 1033 | printf("m_tmpSolverConstraintPool.size() = %i\n",m_tmpSolverConstraintPool.size()); |
---|
| 1034 | printf("m_tmpSolverFrictionConstraintPool.size() = %i\n",m_tmpSolverFrictionConstraintPool.size()); |
---|
| 1035 | |
---|
| 1036 | |
---|
| 1037 | printf("m_tmpSolverBodyPool.capacity() = %i\n",m_tmpSolverBodyPool.capacity()); |
---|
| 1038 | printf("m_tmpSolverConstraintPool.capacity() = %i\n",m_tmpSolverConstraintPool.capacity()); |
---|
| 1039 | printf("m_tmpSolverFrictionConstraintPool.capacity() = %i\n",m_tmpSolverFrictionConstraintPool.capacity()); |
---|
| 1040 | */ |
---|
| 1041 | |
---|
| 1042 | m_tmpSolverBodyPool.resize(0); |
---|
| 1043 | m_tmpSolverConstraintPool.resize(0); |
---|
| 1044 | m_tmpSolverFrictionConstraintPool.resize(0); |
---|
| 1045 | |
---|
| 1046 | |
---|
| 1047 | return 0.f; |
---|
| 1048 | } |
---|
| 1049 | |
---|
| 1050 | /// btSequentialImpulseConstraintSolver Sequentially applies impulses |
---|
| 1051 | btScalar btSequentialImpulseConstraintSolver::solveGroup(btCollisionObject** bodies,int numBodies,btPersistentManifold** manifoldPtr, int numManifolds,btTypedConstraint** constraints,int numConstraints,const btContactSolverInfo& infoGlobal,btIDebugDraw* debugDrawer,btStackAlloc* stackAlloc,btDispatcher* /*dispatcher*/) |
---|
| 1052 | { |
---|
| 1053 | BT_PROFILE("solveGroup"); |
---|
| 1054 | if (infoGlobal.m_solverMode & SOLVER_CACHE_FRIENDLY) |
---|
| 1055 | { |
---|
| 1056 | //you need to provide at least some bodies |
---|
| 1057 | //btSimpleDynamicsWorld needs to switch off SOLVER_CACHE_FRIENDLY |
---|
| 1058 | btAssert(bodies); |
---|
| 1059 | btAssert(numBodies); |
---|
| 1060 | return solveGroupCacheFriendly(bodies,numBodies,manifoldPtr, numManifolds,constraints,numConstraints,infoGlobal,debugDrawer,stackAlloc); |
---|
| 1061 | } |
---|
| 1062 | |
---|
| 1063 | |
---|
| 1064 | |
---|
| 1065 | btContactSolverInfo info = infoGlobal; |
---|
| 1066 | |
---|
| 1067 | int numiter = infoGlobal.m_numIterations; |
---|
| 1068 | |
---|
| 1069 | int totalPoints = 0; |
---|
| 1070 | |
---|
| 1071 | |
---|
| 1072 | { |
---|
| 1073 | short j; |
---|
| 1074 | for (j=0;j<numManifolds;j++) |
---|
| 1075 | { |
---|
| 1076 | btPersistentManifold* manifold = manifoldPtr[j]; |
---|
| 1077 | prepareConstraints(manifold,info,debugDrawer); |
---|
| 1078 | |
---|
| 1079 | for (short p=0;p<manifoldPtr[j]->getNumContacts();p++) |
---|
| 1080 | { |
---|
| 1081 | gOrder[totalPoints].m_manifoldIndex = j; |
---|
| 1082 | gOrder[totalPoints].m_pointIndex = p; |
---|
| 1083 | totalPoints++; |
---|
| 1084 | } |
---|
| 1085 | } |
---|
| 1086 | } |
---|
| 1087 | |
---|
| 1088 | { |
---|
| 1089 | int j; |
---|
| 1090 | for (j=0;j<numConstraints;j++) |
---|
| 1091 | { |
---|
| 1092 | btTypedConstraint* constraint = constraints[j]; |
---|
| 1093 | constraint->buildJacobian(); |
---|
| 1094 | } |
---|
| 1095 | } |
---|
| 1096 | |
---|
| 1097 | |
---|
| 1098 | //should traverse the contacts random order... |
---|
| 1099 | int iteration; |
---|
| 1100 | |
---|
| 1101 | { |
---|
| 1102 | for ( iteration = 0;iteration<numiter;iteration++) |
---|
| 1103 | { |
---|
| 1104 | int j; |
---|
| 1105 | if (infoGlobal.m_solverMode & SOLVER_RANDMIZE_ORDER) |
---|
| 1106 | { |
---|
| 1107 | if ((iteration & 7) == 0) { |
---|
| 1108 | for (j=0; j<totalPoints; ++j) { |
---|
| 1109 | btOrderIndex tmp = gOrder[j]; |
---|
| 1110 | int swapi = btRandInt2(j+1); |
---|
| 1111 | gOrder[j] = gOrder[swapi]; |
---|
| 1112 | gOrder[swapi] = tmp; |
---|
| 1113 | } |
---|
| 1114 | } |
---|
| 1115 | } |
---|
| 1116 | |
---|
| 1117 | for (j=0;j<numConstraints;j++) |
---|
| 1118 | { |
---|
| 1119 | btTypedConstraint* constraint = constraints[j]; |
---|
| 1120 | constraint->solveConstraint(info.m_timeStep); |
---|
| 1121 | } |
---|
| 1122 | |
---|
| 1123 | for (j=0;j<totalPoints;j++) |
---|
| 1124 | { |
---|
| 1125 | btPersistentManifold* manifold = manifoldPtr[gOrder[j].m_manifoldIndex]; |
---|
| 1126 | solve( (btRigidBody*)manifold->getBody0(), |
---|
| 1127 | (btRigidBody*)manifold->getBody1() |
---|
| 1128 | ,manifold->getContactPoint(gOrder[j].m_pointIndex),info,iteration,debugDrawer); |
---|
| 1129 | } |
---|
| 1130 | |
---|
| 1131 | for (j=0;j<totalPoints;j++) |
---|
| 1132 | { |
---|
| 1133 | btPersistentManifold* manifold = manifoldPtr[gOrder[j].m_manifoldIndex]; |
---|
| 1134 | solveFriction((btRigidBody*)manifold->getBody0(), |
---|
| 1135 | (btRigidBody*)manifold->getBody1(),manifold->getContactPoint(gOrder[j].m_pointIndex),info,iteration,debugDrawer); |
---|
| 1136 | } |
---|
| 1137 | |
---|
| 1138 | } |
---|
| 1139 | } |
---|
| 1140 | |
---|
| 1141 | |
---|
| 1142 | |
---|
| 1143 | |
---|
| 1144 | return btScalar(0.); |
---|
| 1145 | } |
---|
| 1146 | |
---|
| 1147 | |
---|
| 1148 | |
---|
| 1149 | |
---|
| 1150 | |
---|
| 1151 | |
---|
| 1152 | |
---|
| 1153 | void btSequentialImpulseConstraintSolver::prepareConstraints(btPersistentManifold* manifoldPtr, const btContactSolverInfo& info,btIDebugDraw* debugDrawer) |
---|
| 1154 | { |
---|
| 1155 | |
---|
| 1156 | (void)debugDrawer; |
---|
| 1157 | |
---|
| 1158 | btRigidBody* body0 = (btRigidBody*)manifoldPtr->getBody0(); |
---|
| 1159 | btRigidBody* body1 = (btRigidBody*)manifoldPtr->getBody1(); |
---|
| 1160 | |
---|
| 1161 | |
---|
| 1162 | //only necessary to refresh the manifold once (first iteration). The integration is done outside the loop |
---|
| 1163 | { |
---|
| 1164 | #ifdef FORCE_REFESH_CONTACT_MANIFOLDS |
---|
| 1165 | manifoldPtr->refreshContactPoints(body0->getCenterOfMassTransform(),body1->getCenterOfMassTransform()); |
---|
| 1166 | #endif //FORCE_REFESH_CONTACT_MANIFOLDS |
---|
| 1167 | int numpoints = manifoldPtr->getNumContacts(); |
---|
| 1168 | |
---|
| 1169 | gTotalContactPoints += numpoints; |
---|
| 1170 | |
---|
| 1171 | |
---|
| 1172 | for (int i=0;i<numpoints ;i++) |
---|
| 1173 | { |
---|
| 1174 | btManifoldPoint& cp = manifoldPtr->getContactPoint(i); |
---|
| 1175 | if (cp.getDistance() <= btScalar(0.)) |
---|
| 1176 | { |
---|
| 1177 | const btVector3& pos1 = cp.getPositionWorldOnA(); |
---|
| 1178 | const btVector3& pos2 = cp.getPositionWorldOnB(); |
---|
| 1179 | |
---|
| 1180 | btVector3 rel_pos1 = pos1 - body0->getCenterOfMassPosition(); |
---|
| 1181 | btVector3 rel_pos2 = pos2 - body1->getCenterOfMassPosition(); |
---|
| 1182 | |
---|
| 1183 | |
---|
| 1184 | //this jacobian entry is re-used for all iterations |
---|
| 1185 | btJacobianEntry jac(body0->getCenterOfMassTransform().getBasis().transpose(), |
---|
| 1186 | body1->getCenterOfMassTransform().getBasis().transpose(), |
---|
| 1187 | rel_pos1,rel_pos2,cp.m_normalWorldOnB,body0->getInvInertiaDiagLocal(),body0->getInvMass(), |
---|
| 1188 | body1->getInvInertiaDiagLocal(),body1->getInvMass()); |
---|
| 1189 | |
---|
| 1190 | |
---|
| 1191 | btScalar jacDiagAB = jac.getDiagonal(); |
---|
| 1192 | |
---|
| 1193 | btConstraintPersistentData* cpd = (btConstraintPersistentData*) cp.m_userPersistentData; |
---|
| 1194 | if (cpd) |
---|
| 1195 | { |
---|
| 1196 | //might be invalid |
---|
| 1197 | cpd->m_persistentLifeTime++; |
---|
| 1198 | if (cpd->m_persistentLifeTime != cp.getLifeTime()) |
---|
| 1199 | { |
---|
| 1200 | //printf("Invalid: cpd->m_persistentLifeTime = %i cp.getLifeTime() = %i\n",cpd->m_persistentLifeTime,cp.getLifeTime()); |
---|
| 1201 | new (cpd) btConstraintPersistentData; |
---|
| 1202 | cpd->m_persistentLifeTime = cp.getLifeTime(); |
---|
| 1203 | |
---|
| 1204 | } else |
---|
| 1205 | { |
---|
| 1206 | //printf("Persistent: cpd->m_persistentLifeTime = %i cp.getLifeTime() = %i\n",cpd->m_persistentLifeTime,cp.getLifeTime()); |
---|
| 1207 | |
---|
| 1208 | } |
---|
| 1209 | } else |
---|
| 1210 | { |
---|
| 1211 | |
---|
| 1212 | //todo: should this be in a pool? |
---|
| 1213 | void* mem = btAlignedAlloc(sizeof(btConstraintPersistentData),16); |
---|
| 1214 | cpd = new (mem)btConstraintPersistentData; |
---|
| 1215 | assert(cpd); |
---|
| 1216 | |
---|
| 1217 | totalCpd ++; |
---|
| 1218 | //printf("totalCpd = %i Created Ptr %x\n",totalCpd,cpd); |
---|
| 1219 | cp.m_userPersistentData = cpd; |
---|
| 1220 | cpd->m_persistentLifeTime = cp.getLifeTime(); |
---|
| 1221 | //printf("CREATED: %x . cpd->m_persistentLifeTime = %i cp.getLifeTime() = %i\n",cpd,cpd->m_persistentLifeTime,cp.getLifeTime()); |
---|
| 1222 | |
---|
| 1223 | } |
---|
| 1224 | assert(cpd); |
---|
| 1225 | |
---|
| 1226 | cpd->m_jacDiagABInv = btScalar(1.) / jacDiagAB; |
---|
| 1227 | |
---|
| 1228 | //Dependent on Rigidbody A and B types, fetch the contact/friction response func |
---|
| 1229 | //perhaps do a similar thing for friction/restutution combiner funcs... |
---|
| 1230 | |
---|
| 1231 | cpd->m_frictionSolverFunc = m_frictionDispatch[body0->m_frictionSolverType][body1->m_frictionSolverType]; |
---|
| 1232 | cpd->m_contactSolverFunc = m_contactDispatch[body0->m_contactSolverType][body1->m_contactSolverType]; |
---|
| 1233 | |
---|
| 1234 | btVector3 vel1 = body0->getVelocityInLocalPoint(rel_pos1); |
---|
| 1235 | btVector3 vel2 = body1->getVelocityInLocalPoint(rel_pos2); |
---|
| 1236 | btVector3 vel = vel1 - vel2; |
---|
| 1237 | btScalar rel_vel; |
---|
| 1238 | rel_vel = cp.m_normalWorldOnB.dot(vel); |
---|
| 1239 | |
---|
| 1240 | btScalar combinedRestitution = cp.m_combinedRestitution; |
---|
| 1241 | |
---|
| 1242 | cpd->m_penetration = cp.getDistance();///btScalar(info.m_numIterations); |
---|
| 1243 | cpd->m_friction = cp.m_combinedFriction; |
---|
[2430] | 1244 | if (cp.m_lifeTime>info.m_restingContactRestitutionThreshold) |
---|
[1963] | 1245 | { |
---|
[2430] | 1246 | cpd->m_restitution = 0.f; |
---|
| 1247 | } else |
---|
| 1248 | { |
---|
| 1249 | cpd->m_restitution = restitutionCurve(rel_vel, combinedRestitution); |
---|
| 1250 | if (cpd->m_restitution <= btScalar(0.)) |
---|
| 1251 | { |
---|
| 1252 | cpd->m_restitution = btScalar(0.0); |
---|
| 1253 | }; |
---|
| 1254 | } |
---|
[1963] | 1255 | |
---|
| 1256 | //restitution and penetration work in same direction so |
---|
| 1257 | //rel_vel |
---|
| 1258 | |
---|
| 1259 | btScalar penVel = -cpd->m_penetration/info.m_timeStep; |
---|
| 1260 | |
---|
| 1261 | if (cpd->m_restitution > penVel) |
---|
| 1262 | { |
---|
| 1263 | cpd->m_penetration = btScalar(0.); |
---|
| 1264 | } |
---|
| 1265 | |
---|
| 1266 | |
---|
| 1267 | btScalar relaxation = info.m_damping; |
---|
| 1268 | if (info.m_solverMode & SOLVER_USE_WARMSTARTING) |
---|
| 1269 | { |
---|
| 1270 | cpd->m_appliedImpulse *= relaxation; |
---|
| 1271 | } else |
---|
| 1272 | { |
---|
| 1273 | cpd->m_appliedImpulse =btScalar(0.); |
---|
| 1274 | } |
---|
| 1275 | |
---|
| 1276 | //for friction |
---|
| 1277 | cpd->m_prevAppliedImpulse = cpd->m_appliedImpulse; |
---|
| 1278 | |
---|
| 1279 | //re-calculate friction direction every frame, todo: check if this is really needed |
---|
| 1280 | btPlaneSpace1(cp.m_normalWorldOnB,cpd->m_frictionWorldTangential0,cpd->m_frictionWorldTangential1); |
---|
| 1281 | |
---|
| 1282 | |
---|
| 1283 | #define NO_FRICTION_WARMSTART 1 |
---|
| 1284 | |
---|
| 1285 | #ifdef NO_FRICTION_WARMSTART |
---|
| 1286 | cpd->m_accumulatedTangentImpulse0 = btScalar(0.); |
---|
| 1287 | cpd->m_accumulatedTangentImpulse1 = btScalar(0.); |
---|
| 1288 | #endif //NO_FRICTION_WARMSTART |
---|
| 1289 | btScalar denom0 = body0->computeImpulseDenominator(pos1,cpd->m_frictionWorldTangential0); |
---|
| 1290 | btScalar denom1 = body1->computeImpulseDenominator(pos2,cpd->m_frictionWorldTangential0); |
---|
| 1291 | btScalar denom = relaxation/(denom0+denom1); |
---|
| 1292 | cpd->m_jacDiagABInvTangent0 = denom; |
---|
| 1293 | |
---|
| 1294 | |
---|
| 1295 | denom0 = body0->computeImpulseDenominator(pos1,cpd->m_frictionWorldTangential1); |
---|
| 1296 | denom1 = body1->computeImpulseDenominator(pos2,cpd->m_frictionWorldTangential1); |
---|
| 1297 | denom = relaxation/(denom0+denom1); |
---|
| 1298 | cpd->m_jacDiagABInvTangent1 = denom; |
---|
| 1299 | |
---|
| 1300 | btVector3 totalImpulse = |
---|
| 1301 | #ifndef NO_FRICTION_WARMSTART |
---|
| 1302 | cpd->m_frictionWorldTangential0*cpd->m_accumulatedTangentImpulse0+ |
---|
| 1303 | cpd->m_frictionWorldTangential1*cpd->m_accumulatedTangentImpulse1+ |
---|
| 1304 | #endif //NO_FRICTION_WARMSTART |
---|
| 1305 | cp.m_normalWorldOnB*cpd->m_appliedImpulse; |
---|
| 1306 | |
---|
| 1307 | |
---|
| 1308 | |
---|
| 1309 | /// |
---|
| 1310 | { |
---|
| 1311 | btVector3 torqueAxis0 = rel_pos1.cross(cp.m_normalWorldOnB); |
---|
| 1312 | cpd->m_angularComponentA = body0->getInvInertiaTensorWorld()*torqueAxis0; |
---|
| 1313 | btVector3 torqueAxis1 = rel_pos2.cross(cp.m_normalWorldOnB); |
---|
| 1314 | cpd->m_angularComponentB = body1->getInvInertiaTensorWorld()*torqueAxis1; |
---|
| 1315 | } |
---|
| 1316 | { |
---|
| 1317 | btVector3 ftorqueAxis0 = rel_pos1.cross(cpd->m_frictionWorldTangential0); |
---|
| 1318 | cpd->m_frictionAngularComponent0A = body0->getInvInertiaTensorWorld()*ftorqueAxis0; |
---|
| 1319 | } |
---|
| 1320 | { |
---|
| 1321 | btVector3 ftorqueAxis1 = rel_pos1.cross(cpd->m_frictionWorldTangential1); |
---|
| 1322 | cpd->m_frictionAngularComponent1A = body0->getInvInertiaTensorWorld()*ftorqueAxis1; |
---|
| 1323 | } |
---|
| 1324 | { |
---|
| 1325 | btVector3 ftorqueAxis0 = rel_pos2.cross(cpd->m_frictionWorldTangential0); |
---|
| 1326 | cpd->m_frictionAngularComponent0B = body1->getInvInertiaTensorWorld()*ftorqueAxis0; |
---|
| 1327 | } |
---|
| 1328 | { |
---|
| 1329 | btVector3 ftorqueAxis1 = rel_pos2.cross(cpd->m_frictionWorldTangential1); |
---|
| 1330 | cpd->m_frictionAngularComponent1B = body1->getInvInertiaTensorWorld()*ftorqueAxis1; |
---|
| 1331 | } |
---|
| 1332 | |
---|
| 1333 | /// |
---|
| 1334 | |
---|
| 1335 | |
---|
| 1336 | |
---|
| 1337 | //apply previous frames impulse on both bodies |
---|
| 1338 | body0->applyImpulse(totalImpulse, rel_pos1); |
---|
| 1339 | body1->applyImpulse(-totalImpulse, rel_pos2); |
---|
| 1340 | } |
---|
| 1341 | |
---|
| 1342 | } |
---|
| 1343 | } |
---|
| 1344 | } |
---|
| 1345 | |
---|
| 1346 | |
---|
| 1347 | btScalar btSequentialImpulseConstraintSolver::solveCombinedContactFriction(btRigidBody* body0,btRigidBody* body1, btManifoldPoint& cp, const btContactSolverInfo& info,int iter,btIDebugDraw* debugDrawer) |
---|
| 1348 | { |
---|
| 1349 | btScalar maxImpulse = btScalar(0.); |
---|
| 1350 | |
---|
| 1351 | { |
---|
| 1352 | |
---|
| 1353 | |
---|
| 1354 | { |
---|
| 1355 | if (cp.getDistance() <= btScalar(0.)) |
---|
| 1356 | { |
---|
| 1357 | |
---|
| 1358 | |
---|
| 1359 | |
---|
| 1360 | { |
---|
| 1361 | |
---|
| 1362 | //btConstraintPersistentData* cpd = (btConstraintPersistentData*) cp.m_userPersistentData; |
---|
| 1363 | btScalar impulse = resolveSingleCollisionCombined( |
---|
| 1364 | *body0,*body1, |
---|
| 1365 | cp, |
---|
| 1366 | info); |
---|
| 1367 | |
---|
| 1368 | if (maxImpulse < impulse) |
---|
| 1369 | maxImpulse = impulse; |
---|
| 1370 | |
---|
| 1371 | } |
---|
| 1372 | } |
---|
| 1373 | } |
---|
| 1374 | } |
---|
| 1375 | return maxImpulse; |
---|
| 1376 | } |
---|
| 1377 | |
---|
| 1378 | |
---|
| 1379 | |
---|
| 1380 | btScalar btSequentialImpulseConstraintSolver::solve(btRigidBody* body0,btRigidBody* body1, btManifoldPoint& cp, const btContactSolverInfo& info,int iter,btIDebugDraw* debugDrawer) |
---|
| 1381 | { |
---|
| 1382 | |
---|
| 1383 | btScalar maxImpulse = btScalar(0.); |
---|
| 1384 | |
---|
| 1385 | { |
---|
| 1386 | |
---|
| 1387 | |
---|
| 1388 | { |
---|
| 1389 | if (cp.getDistance() <= btScalar(0.)) |
---|
| 1390 | { |
---|
| 1391 | |
---|
| 1392 | |
---|
| 1393 | |
---|
| 1394 | { |
---|
| 1395 | |
---|
| 1396 | btConstraintPersistentData* cpd = (btConstraintPersistentData*) cp.m_userPersistentData; |
---|
| 1397 | btScalar impulse = cpd->m_contactSolverFunc( |
---|
| 1398 | *body0,*body1, |
---|
| 1399 | cp, |
---|
| 1400 | info); |
---|
| 1401 | |
---|
| 1402 | if (maxImpulse < impulse) |
---|
| 1403 | maxImpulse = impulse; |
---|
| 1404 | |
---|
| 1405 | } |
---|
| 1406 | } |
---|
| 1407 | } |
---|
| 1408 | } |
---|
| 1409 | return maxImpulse; |
---|
| 1410 | } |
---|
| 1411 | |
---|
| 1412 | btScalar btSequentialImpulseConstraintSolver::solveFriction(btRigidBody* body0,btRigidBody* body1, btManifoldPoint& cp, const btContactSolverInfo& info,int iter,btIDebugDraw* debugDrawer) |
---|
| 1413 | { |
---|
| 1414 | |
---|
| 1415 | (void)debugDrawer; |
---|
| 1416 | (void)iter; |
---|
| 1417 | |
---|
| 1418 | |
---|
| 1419 | { |
---|
| 1420 | |
---|
| 1421 | |
---|
| 1422 | { |
---|
| 1423 | |
---|
| 1424 | if (cp.getDistance() <= btScalar(0.)) |
---|
| 1425 | { |
---|
| 1426 | |
---|
| 1427 | btConstraintPersistentData* cpd = (btConstraintPersistentData*) cp.m_userPersistentData; |
---|
| 1428 | cpd->m_frictionSolverFunc( |
---|
| 1429 | *body0,*body1, |
---|
| 1430 | cp, |
---|
| 1431 | info); |
---|
| 1432 | |
---|
| 1433 | |
---|
| 1434 | } |
---|
| 1435 | } |
---|
| 1436 | |
---|
| 1437 | |
---|
| 1438 | } |
---|
| 1439 | return btScalar(0.); |
---|
| 1440 | } |
---|
| 1441 | |
---|
| 1442 | |
---|
| 1443 | void btSequentialImpulseConstraintSolver::reset() |
---|
| 1444 | { |
---|
| 1445 | m_btSeed2 = 0; |
---|
| 1446 | } |
---|
| 1447 | |
---|
| 1448 | |
---|