diff options
Diffstat (limited to 'extern/bullet2/src/BulletDynamics/Dynamics/btRigidBody.cpp')
| -rw-r--r-- | extern/bullet2/src/BulletDynamics/Dynamics/btRigidBody.cpp | 217 |
1 files changed, 89 insertions, 128 deletions
diff --git a/extern/bullet2/src/BulletDynamics/Dynamics/btRigidBody.cpp b/extern/bullet2/src/BulletDynamics/Dynamics/btRigidBody.cpp index 02cf44d0cfa..93d70de39d8 100644 --- a/extern/bullet2/src/BulletDynamics/Dynamics/btRigidBody.cpp +++ b/extern/bullet2/src/BulletDynamics/Dynamics/btRigidBody.cpp @@ -20,36 +20,54 @@ subject to the following restrictions: #include "LinearMath/btMotionState.h" #include "BulletDynamics/ConstraintSolver/btTypedConstraint.h" -btScalar gLinearAirDamping = btScalar(1.); //'temporarily' global variables btScalar gDeactivationTime = btScalar(2.); bool gDisableDeactivation = false; - -btScalar gLinearSleepingThreshold = btScalar(0.8); -btScalar gAngularSleepingThreshold = btScalar(1.0); static int uniqueId = 0; -btRigidBody::btRigidBody(btScalar mass, btMotionState* motionState, btCollisionShape* collisionShape, const btVector3& localInertia,btScalar linearDamping,btScalar angularDamping,btScalar friction,btScalar restitution) -: - m_linearVelocity(btScalar(0.0), btScalar(0.0), btScalar(0.0)), - m_angularVelocity(btScalar(0.),btScalar(0.),btScalar(0.)), - m_angularFactor(btScalar(1.)), - m_gravity(btScalar(0.0), btScalar(0.0), btScalar(0.0)), - m_totalForce(btScalar(0.0), btScalar(0.0), btScalar(0.0)), - m_totalTorque(btScalar(0.0), btScalar(0.0), btScalar(0.0)), - m_linearDamping(btScalar(0.)), - m_angularDamping(btScalar(0.5)), - m_optionalMotionState(motionState), - m_contactSolverType(0), - m_frictionSolverType(0) + +btRigidBody::btRigidBody(const btRigidBody::btRigidBodyConstructionInfo& constructionInfo) +{ + setupRigidBody(constructionInfo); +} + +btRigidBody::btRigidBody(btScalar mass, btMotionState *motionState, btCollisionShape *collisionShape, const btVector3 &localInertia) +{ + btRigidBodyConstructionInfo cinfo(mass,motionState,collisionShape,localInertia); + setupRigidBody(cinfo); +} + +void btRigidBody::setupRigidBody(const btRigidBody::btRigidBodyConstructionInfo& constructionInfo) { - if (motionState) + m_internalType=CO_RIGID_BODY; + + m_linearVelocity.setValue(btScalar(0.0), btScalar(0.0), btScalar(0.0)); + m_angularVelocity.setValue(btScalar(0.),btScalar(0.),btScalar(0.)); + m_angularFactor = btScalar(1.); + m_anisotropicFriction.setValue(1.f,1.f,1.f); + m_gravity.setValue(btScalar(0.0), btScalar(0.0), btScalar(0.0)); + m_totalForce.setValue(btScalar(0.0), btScalar(0.0), btScalar(0.0)); + m_totalTorque.setValue(btScalar(0.0), btScalar(0.0), btScalar(0.0)), + m_linearDamping = btScalar(0.); + m_angularDamping = btScalar(0.5); + m_linearSleepingThreshold = constructionInfo.m_linearSleepingThreshold; + m_angularSleepingThreshold = constructionInfo.m_angularSleepingThreshold; + m_optionalMotionState = constructionInfo.m_motionState; + m_contactSolverType = 0; + m_frictionSolverType = 0; + m_additionalDamping = constructionInfo.m_additionalDamping; + m_additionalDampingFactor = constructionInfo.m_additionalDampingFactor; + m_additionalLinearDampingThresholdSqr = constructionInfo.m_additionalLinearDampingThresholdSqr; + m_additionalAngularDampingThresholdSqr = constructionInfo.m_additionalAngularDampingThresholdSqr; + m_additionalAngularDampingFactor = constructionInfo.m_additionalAngularDampingFactor; + + if (m_optionalMotionState) { - motionState->getWorldTransform(m_worldTransform); + m_optionalMotionState->getWorldTransform(m_worldTransform); } else { - m_worldTransform = btTransform::getIdentity(); + m_worldTransform = constructionInfo.m_startWorldTransform; } m_interpolationWorldTransform = m_worldTransform; @@ -57,90 +75,21 @@ btRigidBody::btRigidBody(btScalar mass, btMotionState* motionState, btCollisionS m_interpolationAngularVelocity.setValue(0,0,0); //moved to btCollisionObject - m_friction = friction; - m_restitution = restitution; + m_friction = constructionInfo.m_friction; + m_restitution = constructionInfo.m_restitution; - m_collisionShape = collisionShape; + setCollisionShape( constructionInfo.m_collisionShape ); m_debugBodyId = uniqueId++; - //m_internalOwner is to allow upcasting from collision object to rigid body - m_internalOwner = this; - - setMassProps(mass, localInertia); - setDamping(linearDamping, angularDamping); + setMassProps(constructionInfo.m_mass, constructionInfo.m_localInertia); + setDamping(constructionInfo.m_linearDamping, constructionInfo.m_angularDamping); updateInertiaTensor(); } -#ifdef OBSOLETE_MOTIONSTATE_LESS -btRigidBody::btRigidBody( btScalar mass,const btTransform& worldTransform,btCollisionShape* collisionShape,const btVector3& localInertia,btScalar linearDamping,btScalar angularDamping,btScalar friction,btScalar restitution) -: - m_gravity(btScalar(0.0), btScalar(0.0), btScalar(0.0)), - m_totalForce(btScalar(0.0), btScalar(0.0), btScalar(0.0)), - m_totalTorque(btScalar(0.0), btScalar(0.0), btScalar(0.0)), - m_linearVelocity(btScalar(0.0), btScalar(0.0), btScalar(0.0)), - m_angularVelocity(btScalar(0.),btScalar(0.),btScalar(0.)), - m_linearDamping(btScalar(0.)), - m_angularDamping(btScalar(0.5)), - m_optionalMotionState(0), - m_contactSolverType(0), - m_frictionSolverType(0) -{ - - m_worldTransform = worldTransform; - m_interpolationWorldTransform = m_worldTransform; - m_interpolationLinearVelocity.setValue(0,0,0); - m_interpolationAngularVelocity.setValue(0,0,0); - - //moved to btCollisionObject - m_friction = friction; - m_restitution = restitution; - - m_collisionShape = collisionShape; - m_debugBodyId = uniqueId++; - - //m_internalOwner is to allow upcasting from collision object to rigid body - m_internalOwner = this; - - setMassProps(mass, localInertia); - setDamping(linearDamping, angularDamping); - updateInertiaTensor(); - -} - -#endif //OBSOLETE_MOTIONSTATE_LESS - - - - -//#define EXPERIMENTAL_JITTER_REMOVAL 1 -#ifdef EXPERIMENTAL_JITTER_REMOVAL -//Bullet 2.20b has experimental damping code to reduce jitter just before objects fall asleep/deactivate -//doesn't work very well yet (value 0 disabled this damping) -//note there this influences deactivation thresholds! -btScalar gClippedAngvelThresholdSqr = btScalar(0.01); -btScalar gClippedLinearThresholdSqr = btScalar(0.01); -#endif //EXPERIMENTAL_JITTER_REMOVAL - -btScalar gJitterVelocityDampingFactor = btScalar(0.7); void btRigidBody::predictIntegratedTransform(btScalar timeStep,btTransform& predictedTransform) { - -#ifdef EXPERIMENTAL_JITTER_REMOVAL - //if (wantsSleeping()) - { - //clip to avoid jitter - if ((m_angularVelocity.length2() < gClippedAngvelThresholdSqr) && - (m_linearVelocity.length2() < gClippedLinearThresholdSqr)) - { - m_angularVelocity *= gJitterVelocityDampingFactor; - m_linearVelocity *= gJitterVelocityDampingFactor; - } - } - -#endif //EXPERIMENTAL_JITTER_REMOVAL - btTransformUtil::integrateTransform(m_worldTransform,m_linearVelocity,m_angularVelocity,timeStep,predictedTransform); } @@ -191,50 +140,63 @@ void btRigidBody::setDamping(btScalar lin_damping, btScalar ang_damping) -#include <stdio.h> - -void btRigidBody::applyForces(btScalar step) +///applyDamping damps the velocity, using the given m_linearDamping and m_angularDamping +void btRigidBody::applyDamping(btScalar timeStep) { - if (isStaticOrKinematicObject()) - return; - - applyCentralForce(m_gravity); - - m_linearVelocity *= GEN_clamped((btScalar(1.) - step * gLinearAirDamping * m_linearDamping), (btScalar)btScalar(0.0), (btScalar)btScalar(1.0)); - m_angularVelocity *= GEN_clamped((btScalar(1.) - step * m_angularDamping), (btScalar)btScalar(0.0), (btScalar)btScalar(1.0)); + m_linearVelocity *= GEN_clamped((btScalar(1.) - timeStep * m_linearDamping), (btScalar)btScalar(0.0), (btScalar)btScalar(1.0)); + m_angularVelocity *= GEN_clamped((btScalar(1.) - timeStep * m_angularDamping), (btScalar)btScalar(0.0), (btScalar)btScalar(1.0)); -#define FORCE_VELOCITY_DAMPING 1 -#ifdef FORCE_VELOCITY_DAMPING - btScalar speed = m_linearVelocity.length(); - if (speed < m_linearDamping) + if (m_additionalDamping) { - btScalar dampVel = btScalar(0.005); - if (speed > dampVel) - { - btVector3 dir = m_linearVelocity.normalized(); - m_linearVelocity -= dir * dampVel; - } else + //Additional damping can help avoiding lowpass jitter motion, help stability for ragdolls etc. + //Such damping is undesirable, so once the overall simulation quality of the rigid body dynamics system has improved, this should become obsolete + if ((m_angularVelocity.length2() < m_additionalAngularDampingThresholdSqr) && + (m_linearVelocity.length2() < m_additionalLinearDampingThresholdSqr)) { - m_linearVelocity.setValue(btScalar(0.),btScalar(0.),btScalar(0.)); + m_angularVelocity *= m_additionalDampingFactor; + m_linearVelocity *= m_additionalDampingFactor; } - } + - btScalar angSpeed = m_angularVelocity.length(); - if (angSpeed < m_angularDamping) - { - btScalar angDampVel = btScalar(0.005); - if (angSpeed > angDampVel) + btScalar speed = m_linearVelocity.length(); + if (speed < m_linearDamping) { - btVector3 dir = m_angularVelocity.normalized(); - m_angularVelocity -= dir * angDampVel; - } else + btScalar dampVel = btScalar(0.005); + if (speed > dampVel) + { + btVector3 dir = m_linearVelocity.normalized(); + m_linearVelocity -= dir * dampVel; + } else + { + m_linearVelocity.setValue(btScalar(0.),btScalar(0.),btScalar(0.)); + } + } + + btScalar angSpeed = m_angularVelocity.length(); + if (angSpeed < m_angularDamping) { - m_angularVelocity.setValue(btScalar(0.),btScalar(0.),btScalar(0.)); + btScalar angDampVel = btScalar(0.005); + if (angSpeed > angDampVel) + { + btVector3 dir = m_angularVelocity.normalized(); + m_angularVelocity -= dir * angDampVel; + } else + { + m_angularVelocity.setValue(btScalar(0.),btScalar(0.),btScalar(0.)); + } } } -#endif //FORCE_VELOCITY_DAMPING +} + + +void btRigidBody::applyGravity() +{ + if (isStaticOrKinematicObject()) + return; + applyCentralForce(m_gravity); + } void btRigidBody::proceedToTransform(const btTransform& newTrans) @@ -285,7 +247,6 @@ void btRigidBody::integrateVelocities(btScalar step) m_angularVelocity *= (MAX_ANGVEL/step) /angvel; } - clearForces(); } btQuaternion btRigidBody::getOrientation() const @@ -342,4 +303,4 @@ void btRigidBody::removeConstraintRef(btTypedConstraint* c) { m_constraintRefs.remove(c); m_checkCollideWith = m_constraintRefs.size() > 0; -}
\ No newline at end of file +} |