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Diffstat (limited to 'thirdparty/bullet/src/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp')
-rw-r--r-- | thirdparty/bullet/src/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/thirdparty/bullet/src/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp b/thirdparty/bullet/src/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp deleted file mode 100644 index 5fdb7007d8..0000000000 --- a/thirdparty/bullet/src/BulletDynamics/Featherstone/btMultiBodyGearConstraint.cpp +++ /dev/null @@ -1,184 +0,0 @@ -/* -Bullet Continuous Collision Detection and Physics Library -Copyright (c) 2013 Erwin Coumans http://bulletphysics.org - -This software is provided 'as-is', without any express or implied warranty. -In no event will the authors be held liable for any damages arising from the use of this software. -Permission is granted to anyone to use this software for any purpose, -including commercial applications, and to alter it and redistribute it freely, -subject to the following restrictions: - -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. -2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. -3. This notice may not be removed or altered from any source distribution. -*/ - -///This file was written by Erwin Coumans - -#include "btMultiBodyGearConstraint.h" -#include "btMultiBody.h" -#include "btMultiBodyLinkCollider.h" -#include "BulletCollision/CollisionDispatch/btCollisionObject.h" - -btMultiBodyGearConstraint::btMultiBodyGearConstraint(btMultiBody* bodyA, int linkA, btMultiBody* bodyB, int linkB, const btVector3& pivotInA, const btVector3& pivotInB, const btMatrix3x3& frameInA, const btMatrix3x3& frameInB) - :btMultiBodyConstraint(bodyA,bodyB,linkA,linkB,1,false), - m_gearRatio(1), - m_gearAuxLink(-1), - m_erp(0), - m_relativePositionTarget(0) -{ - -} - -void btMultiBodyGearConstraint::finalizeMultiDof() -{ - - allocateJacobiansMultiDof(); - - m_numDofsFinalized = m_jacSizeBoth; -} - -btMultiBodyGearConstraint::~btMultiBodyGearConstraint() -{ -} - - -int btMultiBodyGearConstraint::getIslandIdA() const -{ - - if (m_bodyA) - { - btMultiBodyLinkCollider* col = m_bodyA->getBaseCollider(); - if (col) - return col->getIslandTag(); - for (int i=0;i<m_bodyA->getNumLinks();i++) - { - if (m_bodyA->getLink(i).m_collider) - return m_bodyA->getLink(i).m_collider->getIslandTag(); - } - } - return -1; -} - -int btMultiBodyGearConstraint::getIslandIdB() const -{ - if (m_bodyB) - { - btMultiBodyLinkCollider* col = m_bodyB->getBaseCollider(); - if (col) - return col->getIslandTag(); - - for (int i=0;i<m_bodyB->getNumLinks();i++) - { - col = m_bodyB->getLink(i).m_collider; - if (col) - return col->getIslandTag(); - } - } - return -1; -} - - -void btMultiBodyGearConstraint::createConstraintRows(btMultiBodyConstraintArray& constraintRows, - btMultiBodyJacobianData& data, - const btContactSolverInfo& infoGlobal) -{ - // only positions need to be updated -- data.m_jacobians and force - // directions were set in the ctor and never change. - - if (m_numDofsFinalized != m_jacSizeBoth) - { - finalizeMultiDof(); - } - - //don't crash - if (m_numDofsFinalized != m_jacSizeBoth) - return; - - - if (m_maxAppliedImpulse==0.f) - return; - - // note: we rely on the fact that data.m_jacobians are - // always initialized to zero by the Constraint ctor - int linkDoF = 0; - unsigned int offsetA = 6 + (m_bodyA->getLink(m_linkA).m_dofOffset + linkDoF); - unsigned int offsetB = 6 + (m_bodyB->getLink(m_linkB).m_dofOffset + linkDoF); - - // row 0: the lower bound - jacobianA(0)[offsetA] = 1; - jacobianB(0)[offsetB] = m_gearRatio; - - btScalar posError = 0; - const btVector3 dummy(0, 0, 0); - - btScalar kp = 1; - btScalar kd = 1; - int numRows = getNumRows(); - - for (int row=0;row<numRows;row++) - { - btMultiBodySolverConstraint& constraintRow = constraintRows.expandNonInitializing(); - - - int dof = 0; - btScalar currentPosition = m_bodyA->getJointPosMultiDof(m_linkA)[dof]; - btScalar currentVelocity = m_bodyA->getJointVelMultiDof(m_linkA)[dof]; - btScalar auxVel = 0; - - if (m_gearAuxLink>=0) - { - auxVel = m_bodyA->getJointVelMultiDof(m_gearAuxLink)[dof]; - } - currentVelocity += auxVel; - if (m_erp!=0) - { - btScalar currentPositionA = m_bodyA->getJointPosMultiDof(m_linkA)[dof]; - btScalar currentPositionB = m_gearRatio*m_bodyA->getJointPosMultiDof(m_linkB)[dof]; - btScalar diff = currentPositionB+currentPositionA; - btScalar desiredPositionDiff = this->m_relativePositionTarget; - posError = -m_erp*(desiredPositionDiff - diff); - } - - btScalar desiredRelativeVelocity = auxVel; - - fillMultiBodyConstraint(constraintRow,data,jacobianA(row),jacobianB(row),dummy,dummy,dummy,dummy,posError,infoGlobal,-m_maxAppliedImpulse,m_maxAppliedImpulse,false,1,false,desiredRelativeVelocity); - - constraintRow.m_orgConstraint = this; - constraintRow.m_orgDofIndex = row; - { - //expect either prismatic or revolute joint type for now - btAssert((m_bodyA->getLink(m_linkA).m_jointType == btMultibodyLink::eRevolute)||(m_bodyA->getLink(m_linkA).m_jointType == btMultibodyLink::ePrismatic)); - switch (m_bodyA->getLink(m_linkA).m_jointType) - { - case btMultibodyLink::eRevolute: - { - constraintRow.m_contactNormal1.setZero(); - constraintRow.m_contactNormal2.setZero(); - btVector3 revoluteAxisInWorld = quatRotate(m_bodyA->getLink(m_linkA).m_cachedWorldTransform.getRotation(),m_bodyA->getLink(m_linkA).m_axes[0].m_topVec); - constraintRow.m_relpos1CrossNormal=revoluteAxisInWorld; - constraintRow.m_relpos2CrossNormal=-revoluteAxisInWorld; - - break; - } - case btMultibodyLink::ePrismatic: - { - btVector3 prismaticAxisInWorld = quatRotate(m_bodyA->getLink(m_linkA).m_cachedWorldTransform.getRotation(),m_bodyA->getLink(m_linkA).m_axes[0].m_bottomVec); - constraintRow.m_contactNormal1=prismaticAxisInWorld; - constraintRow.m_contactNormal2=-prismaticAxisInWorld; - constraintRow.m_relpos1CrossNormal.setZero(); - constraintRow.m_relpos2CrossNormal.setZero(); - break; - } - default: - { - btAssert(0); - } - }; - - } - - } - -} - |