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minor fix in friction anchors for btMultiBody

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This commit is contained in:
Erwin Coumans
2017-03-21 09:24:00 -07:00
parent 0c874aa43a
commit 61b28621ea
1 changed files with 12 additions and 7 deletions
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19
src/BulletDynamics/Featherstone/btMultiBodyConstraintSolver.cpp
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@@ -543,15 +543,20 @@ void btMultiBodyConstraintSolver::setupMultiBodyContactConstraint(btMultiBodySol
btScalar positionalError = 0.f;
btScalar velocityError = restitution - rel_vel;// * damping; //note for friction restitution is always set to 0 (check above) so it is acutally velocityError = -rel_vel for friction
if (distance>0)
{
positionalError = 0;
velocityError -= distance / infoGlobal.m_timeStep;
} else
if (isFriction)
{
positionalError = -distance * erp/infoGlobal.m_timeStep;
} else
{
if (distance>0)
{
positionalError = 0;
velocityError -= distance / infoGlobal.m_timeStep;
} else
{
positionalError = -distance * erp/infoGlobal.m_timeStep;
}
}
btScalar penetrationImpulse = positionalError*solverConstraint.m_jacDiagABInv;