Package org.jbox2d.dynamics.joints

Class DistanceJointDef

  • public class DistanceJointDef
extends JointDef
    Distance joint definition. This requires defining an anchor point on both bodies and the non-zero length of the distance joint. The definition uses local anchor points so that the initial configuration can violate the constraint slightly. This helps when saving and loading a game.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void initialize​(Body b1, Body b2, Vec2 anchor1, Vec2 anchor2)
      Initialize the bodies, anchors, and length using the world anchors.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • localAnchorA

        public final Vec2 localAnchorA
        The local anchor point relative to body1's origin.

      • localAnchorB

        public final Vec2 localAnchorB
        The local anchor point relative to body2's origin.

      • length

        public float length
        The equilibrium length between the anchor points.

      • frequencyHz

        public float frequencyHz
        The mass-spring-damper frequency in Hertz.

      • dampingRatio

        public float dampingRatio
        The damping ratio. 0 = no damping, 1 = critical damping.

    • Constructor Detail

      • DistanceJointDef

        public DistanceJointDef()

    • Method Detail

      • initialize

        public void initialize​(Body b1,
                       Body b2,
                       Vec2 anchor1,
                       Vec2 anchor2)
        Initialize the bodies, anchors, and length using the world anchors.
        Parameters:
        b1 - First body
        b2 - Second body
        anchor1 - World anchor on first body
        anchor2 - World anchor on second body