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improve handling of restitution by using the velocity (linear/angular) before applying forces: this is done by re-introducing the btSolverBody and only apply the forces to solver body, and use the original rigid body velocity for restitution computation.

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warmstarting for contact points was broken, fix in btPersistentManifold
enable split impulse by default (at the cost of some performance)
add  the option for zero-length friction (instead of recomputing friction directions using btPlaneSpace), use the solver mode flag SOLVER_ALLOW_ZERO_LENGTH_FRICTION_DIRECTIONS
precompute lateral friction directions (in btManifoldResult)
remove the mConstraintRow[3] from btManifoldPoint, it just took a lot of memory with no benefits: fixed it in btParallelConstraintSolver
This commit is contained in:
erwin.coumans
2012-08-31 19:46:24 +00:00
parent 37ebcc3aa6
commit 84b1774dda
17 changed files with 730 additions and 509 deletions
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27
src/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.cpp
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@@ -134,11 +134,8 @@ struct InplaceSolverIslandCallback : public btSimulationIslandManager::IslandCal
{
if (islandId<0)
{
if (numManifolds + m_numConstraints)
{
///we don't split islands, so all constraints/contact manifolds/bodies are passed into the solver regardless the island id
m_solver->solveGroup( bodies,numBodies,manifolds, numManifolds,&m_sortedConstraints[0],m_numConstraints,*m_solverInfo,m_debugDrawer,m_stackAlloc,m_dispatcher);
}
///we don't split islands, so all constraints/contact manifolds/bodies are passed into the solver regardless the island id
m_solver->solveGroup( bodies,numBodies,manifolds, numManifolds,&m_sortedConstraints[0],m_numConstraints,*m_solverInfo,m_debugDrawer,m_stackAlloc,m_dispatcher);
} else
{
//also add all non-contact constraints/joints for this island
@@ -166,11 +163,7 @@ struct InplaceSolverIslandCallback : public btSimulationIslandManager::IslandCal
if (m_solverInfo->m_minimumSolverBatchSize<=1)
{
///only call solveGroup if there is some work: avoid virtual function call, its overhead can be excessive
if (numManifolds + numCurConstraints)
{
m_solver->solveGroup( bodies,numBodies,manifolds, numManifolds,startConstraint,numCurConstraints,*m_solverInfo,m_debugDrawer,m_stackAlloc,m_dispatcher);
}
m_solver->solveGroup( bodies,numBodies,manifolds, numManifolds,startConstraint,numCurConstraints,*m_solverInfo,m_debugDrawer,m_stackAlloc,m_dispatcher);
} else
{
@@ -192,15 +185,12 @@ struct InplaceSolverIslandCallback : public btSimulationIslandManager::IslandCal
}
void processConstraints()
{
if (m_manifolds.size() + m_constraints.size()>0)
{
btCollisionObject** bodies = m_bodies.size()? &m_bodies[0]:0;
btPersistentManifold** manifold = m_manifolds.size()?&m_manifolds[0]:0;
btTypedConstraint** constraints = m_constraints.size()?&m_constraints[0]:0;
btCollisionObject** bodies = m_bodies.size()? &m_bodies[0]:0;
btPersistentManifold** manifold = m_manifolds.size()?&m_manifolds[0]:0;
btTypedConstraint** constraints = m_constraints.size()?&m_constraints[0]:0;
m_solver->solveGroup( bodies,m_bodies.size(),manifold, m_manifolds.size(),constraints, m_constraints.size() ,*m_solverInfo,m_debugDrawer,m_stackAlloc,m_dispatcher);
}
m_solver->solveGroup( bodies,m_bodies.size(),manifold, m_manifolds.size(),constraints, m_constraints.size() ,*m_solverInfo,m_debugDrawer,m_stackAlloc,m_dispatcher);
m_bodies.resize(0);
m_manifolds.resize(0);
m_constraints.resize(0);
@@ -977,7 +967,8 @@ void btDiscreteDynamicsWorld::predictUnconstraintMotion(btScalar timeStep)
btRigidBody* body = m_nonStaticRigidBodies[i];
if (!body->isStaticOrKinematicObject())
{
body->integrateVelocities( timeStep);
//don't integrate/update velocities here, it happens in the constraint solver
//damping
body->applyDamping(timeStep);