org.jbox2d.dynamics

Class BodyDef

java.lang.Object

org.jbox2d.dynamics.BodyDef

public class BodyDef
extends java.lang.Object

A body definition holds all the data needed to construct a rigid body. You can safely re-use body definitions. Shapes are added to a body after construction.

Author:

daniel

Field Summary

Fields

Modifier and Type	Field and Description
boolean	active Does this body start out active?
boolean	allowSleep Set this flag to false if this body should never fall asleep.
float	angle The world angle of the body in radians.
float	angularDamping Angular damping is use to reduce the angular velocity.
float	angularVelocity The angular velocity of the body.
boolean	awake Is this body initially sleeping?
boolean	bullet Is this a fast moving body that should be prevented from tunneling through other moving bodies? Note that all bodies are prevented from tunneling through kinematic and static bodies.
boolean	fixedRotation Should this body be prevented from rotating? Useful for characters.
float	gravityScale Experimental: scales the inertia tensor.
float	linearDamping Linear damping is use to reduce the linear velocity.
Vec2	linearVelocity The linear velocity of the body in world co-ordinates.
Vec2	position The world position of the body.
BodyType	type The body type: static, kinematic, or dynamic.
java.lang.Object	userData Use this to store application specific body data.

Constructor Summary

Constructors

Constructor and Description
BodyDef()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

type

public BodyType type

The body type: static, kinematic, or dynamic. Note: if a dynamic body would have zero mass, the mass is set to one.

userData

public java.lang.Object userData

Use this to store application specific body data.

position

public Vec2 position

The world position of the body. Avoid creating bodies at the origin since this can lead to many overlapping shapes.

angle

public float angle

The world angle of the body in radians.

linearVelocity

public Vec2 linearVelocity

The linear velocity of the body in world co-ordinates.

angularVelocity

public float angularVelocity

The angular velocity of the body.

linearDamping

public float linearDamping

Linear damping is use to reduce the linear velocity. The damping parameter can be larger than 1.0f but the damping effect becomes sensitive to the time step when the damping parameter is large.

angularDamping

public float angularDamping

Angular damping is use to reduce the angular velocity. The damping parameter can be larger than 1.0f but the damping effect becomes sensitive to the time step when the damping parameter is large.

allowSleep

public boolean allowSleep

Set this flag to false if this body should never fall asleep. Note that this increases CPU usage.

awake

public boolean awake

Is this body initially sleeping?

fixedRotation

public boolean fixedRotation

Should this body be prevented from rotating? Useful for characters.

bullet

public boolean bullet

Is this a fast moving body that should be prevented from tunneling through other moving bodies? Note that all bodies are prevented from tunneling through kinematic and static bodies. This setting is only considered on dynamic bodies.

active

public boolean active

Does this body start out active?

gravityScale

public float gravityScale

Experimental: scales the inertia tensor.

Constructor Detail

BodyDef

public BodyDef()