com.badlogic.gdx.physics.box2d.joints
Class WheelJoint

java.lang.Object
  com.badlogic.gdx.physics.box2d.Joint
      com.badlogic.gdx.physics.box2d.joints.WheelJoint

public class WheelJoint
extends Joint

A wheel joint. This joint provides two degrees of freedom: translation along an axis fixed in body1 and rotation in the plane. You can use a joint limit to restrict the range of motion and a joint motor to drive the rotation or to model rotational friction. This joint is designed for vehicle suspensions.

Constructor Summary

WheelJoint(World world, long addr)

Method Summary

void	enableMotor(boolean flag) Enable/disable the joint motor.
float	getJointSpeed() Get the current joint translation speed, usually in meters per second.
float	getJointTranslation() Get the current joint translation, usually in meters.
float	getMaxMotorTorque()
float	getMotorSpeed() Get the motor speed, usually in radians per second.
float	getMotorTorque(float invDt) Get the current motor torque given the inverse time step, usually in N-m.
float	getSpringDampingRatio()
float	getSpringFrequencyHz()
void	setMaxMotorTorque(float torque) Set/Get the maximum motor force, usually in N-m.
void	setMotorSpeed(float speed) Set the motor speed, usually in radians per second.
void	setSpringDampingRatio(float ratio) Set/Get the spring damping ratio
void	setSpringFrequencyHz(float hz) Set/Get the spring frequency in hertz.

Methods inherited from class com.badlogic.gdx.physics.box2d.Joint

getAnchorA, getAnchorB, getBodyA, getBodyB, getReactionForce, getReactionTorque, getType, getUserData, isActive, setUserData

Methods inherited from class java.lang.Object

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

Constructor Detail

WheelJoint

public WheelJoint(World world,
                  long addr)

Method Detail

getJointTranslation

public float getJointTranslation()

Get the current joint translation, usually in meters.

getJointSpeed

public float getJointSpeed()

Get the current joint translation speed, usually in meters per second.

enableMotor

public void enableMotor(boolean flag)

Enable/disable the joint motor.

setMotorSpeed

public void setMotorSpeed(float speed)

Set the motor speed, usually in radians per second.

getMotorSpeed

public float getMotorSpeed()

Get the motor speed, usually in radians per second.

setMaxMotorTorque

public void setMaxMotorTorque(float torque)

Set/Get the maximum motor force, usually in N-m.

getMaxMotorTorque

public float getMaxMotorTorque()

getMotorTorque

public float getMotorTorque(float invDt)

Get the current motor torque given the inverse time step, usually in N-m.

setSpringFrequencyHz

public void setSpringFrequencyHz(float hz)

Set/Get the spring frequency in hertz. Setting the frequency to zero disables the spring.

getSpringFrequencyHz

public float getSpringFrequencyHz()

setSpringDampingRatio

public void setSpringDampingRatio(float ratio)

Set/Get the spring damping ratio

getSpringDampingRatio

public float getSpringDampingRatio()