forked from bartvdbraak/blender
Anisotropic Friction bugfix for #18854 http://projects.blender.org/tracker/index.php?func=detail&aid=18854&group_id=9&atid=125
Thanks to Campbell for the reproduction case!
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extern/bullet2/src/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.cpp
vendored
16
extern/bullet2/src/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.cpp
vendored
@ -539,9 +539,6 @@ void btSequentialImpulseConstraintSolver::convertContact(btPersistentManifold* m
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if (!(infoGlobal.m_solverMode & SOLVER_DISABLE_VELOCITY_DEPENDENT_FRICTION_DIRECTION) && lat_rel_vel > SIMD_EPSILON)
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{
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cp.m_lateralFrictionDir1 /= btSqrt(lat_rel_vel);
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applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir1);
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applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir1);
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addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
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if((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS))
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{
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cp.m_lateralFrictionDir2 = cp.m_lateralFrictionDir1.cross(cp.m_normalWorldOnB);
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@ -550,21 +547,26 @@ void btSequentialImpulseConstraintSolver::convertContact(btPersistentManifold* m
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applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir2);
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addFrictionConstraint(cp.m_lateralFrictionDir2,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
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}
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applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir1);
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applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir1);
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addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
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cp.m_lateralFrictionInitialized = true;
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} else
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{
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//re-calculate friction direction every frame, todo: check if this is really needed
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btPlaneSpace1(cp.m_normalWorldOnB,cp.m_lateralFrictionDir1,cp.m_lateralFrictionDir2);
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applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir1);
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applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir1);
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addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
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if ((infoGlobal.m_solverMode & SOLVER_USE_2_FRICTION_DIRECTIONS))
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{
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applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir2);
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applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir2);
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addFrictionConstraint(cp.m_lateralFrictionDir2,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
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}
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applyAnisotropicFriction(colObj0,cp.m_lateralFrictionDir1);
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applyAnisotropicFriction(colObj1,cp.m_lateralFrictionDir1);
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addFrictionConstraint(cp.m_lateralFrictionDir1,solverBodyIdA,solverBodyIdB,frictionIndex,cp,rel_pos1,rel_pos2,colObj0,colObj1, relaxation);
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cp.m_lateralFrictionInitialized = true;
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}
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