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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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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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; |
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450 | solverConstraint.m_solverBodyIdB = solverBodyIdB; |
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451 | solverConstraint.m_constraintType = btSolverConstraint::BT_SOLVER_FRICTION_1D; |
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452 | solverConstraint.m_frictionIndex = frictionIndex; |
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453 | |
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454 | solverConstraint.m_friction = cp.m_combinedFriction; |
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455 | solverConstraint.m_originalContactPoint = 0; |
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456 | |
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457 | solverConstraint.m_appliedImpulse = btScalar(0.); |
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458 | solverConstraint.m_appliedPushImpulse = 0.f; |
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459 | solverConstraint.m_penetration = 0.f; |
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460 | { |
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461 | btVector3 ftorqueAxis1 = rel_pos1.cross(solverConstraint.m_contactNormal); |
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462 | solverConstraint.m_relpos1CrossNormal = ftorqueAxis1; |
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463 | solverConstraint.m_angularComponentA = body0 ? body0->getInvInertiaTensorWorld()*ftorqueAxis1 : btVector3(0,0,0); |
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464 | } |
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465 | { |
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466 | btVector3 ftorqueAxis1 = rel_pos2.cross(solverConstraint.m_contactNormal); |
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467 | solverConstraint.m_relpos2CrossNormal = ftorqueAxis1; |
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468 | solverConstraint.m_angularComponentB = body1 ? body1->getInvInertiaTensorWorld()*ftorqueAxis1 : btVector3(0,0,0); |
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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 | |
---|
494 | return solverConstraint; |
---|
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; |
---|
721 | |
---|
722 | |
---|
723 | if (cp.m_lifeTime>infoGlobal.m_restingContactRestitutionThreshold) |
---|
724 | { |
---|
725 | solverConstraint.m_restitution = 0.f; |
---|
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 | } |
---|
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); |
---|
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 | } |
---|
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); |
---|
784 | if (infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) |
---|
785 | { |
---|
786 | cp.m_lateralFrictionInitialized = true; |
---|
787 | } |
---|
788 | } |
---|
789 | |
---|
790 | } else |
---|
791 | { |
---|
792 | addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation); |
---|
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); |
---|
795 | } |
---|
796 | |
---|
797 | if (infoGlobal.m_solverMode & SOLVER_USE_FRICTION_WARMSTARTING) |
---|
798 | { |
---|
799 | { |
---|
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 | } |
---|
812 | } |
---|
813 | { |
---|
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 | } |
---|
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 | |
---|
853 | ///@todo: use stack allocator for such temporarily memory, same for solver bodies/constraints |
---|
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; |
---|
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 | } |
---|
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; |
---|
1244 | if (cp.m_lifeTime>info.m_restingContactRestitutionThreshold) |
---|
1245 | { |
---|
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 | } |
---|
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 | |
---|