Class MouseJoint


  • public class MouseJoint
    extends Joint
    A mouse joint is used to make a point on a body track a specified world point. This a soft constraint with a maximum force. This allows the constraint to stretch and without applying huge forces. NOTE: this joint is not documented in the manual because it was developed to be used in the testbed. If you want to learn how to use the mouse joint, look at the testbed.
    • Field Detail

      • m_localAnchorB

        private final Vec2 m_localAnchorB
      • m_targetA

        private final Vec2 m_targetA
      • m_frequencyHz

        private float m_frequencyHz
      • m_dampingRatio

        private float m_dampingRatio
      • m_beta

        private float m_beta
      • m_impulse

        private final Vec2 m_impulse
      • m_maxForce

        private float m_maxForce
      • m_gamma

        private float m_gamma
      • m_indexB

        private int m_indexB
      • m_rB

        private final Vec2 m_rB
      • m_localCenterB

        private final Vec2 m_localCenterB
      • m_invMassB

        private float m_invMassB
      • m_invIB

        private float m_invIB
      • m_mass

        private final Mat22 m_mass
      • m_C

        private final Vec2 m_C
    • Method Detail

      • getAnchorA

        public void getAnchorA​(Vec2 argOut)
        Description copied from class: Joint
        get the anchor point on bodyA in world coordinates.
        Specified by:
        getAnchorA in class Joint
      • getAnchorB

        public void getAnchorB​(Vec2 argOut)
        Description copied from class: Joint
        get the anchor point on bodyB in world coordinates.
        Specified by:
        getAnchorB in class Joint
      • getReactionForce

        public void getReactionForce​(float invDt,
                                     Vec2 argOut)
        Description copied from class: Joint
        get the reaction force on body2 at the joint anchor in Newtons.
        Specified by:
        getReactionForce in class Joint
      • getReactionTorque

        public float getReactionTorque​(float invDt)
        Description copied from class: Joint
        get the reaction torque on body2 in N*m.
        Specified by:
        getReactionTorque in class Joint
        Returns:
      • setTarget

        public void setTarget​(Vec2 target)
      • getTarget

        public Vec2 getTarget()
      • setMaxForce

        public void setMaxForce​(float force)
      • getMaxForce

        public float getMaxForce()
      • setFrequency

        public void setFrequency​(float hz)
      • getFrequency

        public float getFrequency()
      • setDampingRatio

        public void setDampingRatio​(float ratio)
      • getDampingRatio

        public float getDampingRatio()
      • solvePositionConstraints

        public boolean solvePositionConstraints​(SolverData data)
        Description copied from class: Joint
        This returns true if the position errors are within tolerance.
        Specified by:
        solvePositionConstraints in class Joint
        Returns: