How to disable Y-axis movement in the Bullet physics engine

azer
  • How to disable Y-axis movement in the Bullet physics engine azer

    I want to create an object than only moves along the the X and Z axes, while keeping the Y-axis disabled (it's like movement in 2D, and the object wont fall down).

    I'm currently using a 6 dof constraint to restrict movement in the Y-axis, but it's not working:

    btRigidBody* zeroBody = new btRigidBody(0, NULL, NULL); // Create the body that we attach things to
    btRigidBody* robot = mCarChassis->getBulletRigidBody();
    
    btGeneric6DofConstraint* constrict = new btGeneric6DofConstraint(*robot, *zeroBody, btTransform::getIdentity(), btTransform::getIdentity(), false);
    
    constrict->setLinearLowerLimit( btVector3( 1, 1, 1));
    constrict->setLinearUpperLimit( btVector3(-1, 1,-1));
    
    constrict->setAngularLowerLimit( btVector3( 1,  1,  1) );
    constrict->setAngularUpperLimit( btVector3(-1, -1, -1) );
    
    mBulletWorld->getBulletDynamicsWorld()->addConstraint(constrict);
    

    Thanks!

Tags
c++ bullet-physics
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