Class PrismaticJointDef

java.lang.Object
org.jbox2d.dynamics.joints.JointDef
org.jbox2d.dynamics.joints.PrismaticJointDef
public class PrismaticJointDef extends JointDef
Prismatic joint definition. This requires defining a line of motion using an axis and an anchor point. The definition uses local anchor points and a local axis so that the initial configuration can violate the constraint slightly. The joint translation is zero when the local anchor points coincide in world space. Using local anchors and a local axis helps when saving and loading a game.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    boolean
    enableLimit
    Enable/disable the joint limit.
    boolean
    enableMotor
    Enable/disable the joint motor.
    final Vec2
    localAnchorA
    The local anchor point relative to body1's origin.
    final Vec2
    localAnchorB
    The local anchor point relative to body2's origin.
    final Vec2
    localAxisA
    The local translation axis in body1.
    float
    lowerTranslation
    The lower translation limit, usually in meters.
    float
    maxMotorForce
    The maximum motor torque, usually in N-m.
    float
    motorSpeed
    The desired motor speed in radians per second.
    float
    referenceAngle
    The constrained angle between the bodies: body2_angle - body1_angle.
    float
    upperTranslation
    The upper translation limit, usually in meters.

    Fields inherited from class JointDef

    bodyA, bodyB, collideConnected, type, userData

  • Constructor Summary

    Constructors
    Constructor
    Description
    PrismaticJointDef()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    initialize(Body b1, Body b2, Vec2 anchor, Vec2 axis)
    Initialize the bodies, anchors, axis, and reference angle using the world anchor and world axis.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • 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.

    • localAxisA

      public final Vec2 localAxisA
      The local translation axis in body1.

    • referenceAngle

      public float referenceAngle
      The constrained angle between the bodies: body2_angle - body1_angle.

    • enableLimit

      public boolean enableLimit
      Enable/disable the joint limit.

    • lowerTranslation

      public float lowerTranslation
      The lower translation limit, usually in meters.

    • upperTranslation

      public float upperTranslation
      The upper translation limit, usually in meters.

    • enableMotor

      public boolean enableMotor
      Enable/disable the joint motor.

    • maxMotorForce

      public float maxMotorForce
      The maximum motor torque, usually in N-m.

    • motorSpeed

      public float motorSpeed
      The desired motor speed in radians per second.

  • Constructor Details

    • PrismaticJointDef

      public PrismaticJointDef()

  • Method Details

    • initialize

      public void initialize(Body b1, Body b2, Vec2 anchor, Vec2 axis)
      Initialize the bodies, anchors, axis, and reference angle using the world anchor and world axis.