Package org.jbox2d.dynamics

Class 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.

    • Field Summary

      Fields 
      Modifier and Type Field 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 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()