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.

Field Summary

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

addr, jointEdgeA, jointEdgeB

Constructor Summary

Constructors

Constructor and Description
WheelJoint(World world, long addr)

Method Summary

Modifier and Type	Method and Description
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.
Vector2	getLocalAnchorA()
Vector2	getLocalAnchorB()
Vector2	getLocalAxisA()
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()
boolean	isMotorEnabled() Is the joint motor enabled?
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, getCollideConnected, getReactionForce, getReactionTorque, getType, getUserData, isActive, setUserData

Methods inherited from class java.lang.Object

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

Constructor Detail

WheelJoint

public WheelJoint(World world,
                  long addr)

Method Detail

getLocalAnchorA

public Vector2 getLocalAnchorA()

getLocalAnchorB

public Vector2 getLocalAnchorB()

getLocalAxisA

public Vector2 getLocalAxisA()

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.

isMotorEnabled

public boolean isMotorEnabled()

Is the joint motor enabled?

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()