b2DistanceJointDef Struct Reference

#include <b2DistanceJoint.h>

Inheritance diagram for b2DistanceJointDef:

Public Member Functions
	b2DistanceJointDef ()
void	Initialize (b2Body *bodyA, b2Body *bodyB, const b2Vec2 &anchorA, const b2Vec2 &anchorB)
Public Member Functions inherited from b2JointDef
	b2JointDef ()

Public Attributes
b2Vec2	localAnchorA
	The local anchor point relative to bodyA's origin. More...
b2Vec2	localAnchorB
	The local anchor point relative to bodyB's origin. More...
float32	length
	The natural length between the anchor points. More...
float32	frequencyHz
float32	dampingRatio
	The damping ratio. 0 = no damping, 1 = critical damping. More...
Public Attributes inherited from b2JointDef
b2JointType	type
	The joint type is set automatically for concrete joint types. More...
void *	userData
	Use this to attach application specific data to your joints. More...
b2Body *	bodyA
	The first attached body. More...
b2Body *	bodyB
	The second attached body. More...
bool	collideConnected
	Set this flag to true if the attached bodies should collide. More...

Detailed Description

Distance joint definition. This requires defining an anchor point on both bodies and the non-zero length of the distance joint. The definition uses local anchor points so that the initial configuration can violate the constraint slightly. This helps when saving and loading a game.

Warning

Do not use a zero or short length.

Constructor & Destructor Documentation

b2DistanceJointDef ( )

inline

Member Function Documentation

void Initialize	(	b2Body *	bodyA,
		b2Body *	bodyB,
		const b2Vec2 &	anchorA,
		const b2Vec2 &	anchorB
	)

Initialize the bodies, anchors, and length using the world anchors.

Member Data Documentation

float32 dampingRatio

The damping ratio. 0 = no damping, 1 = critical damping.

float32 frequencyHz

The mass-spring-damper frequency in Hertz. A value of 0 disables softness.

float32 length

The natural length between the anchor points.

b2Vec2 localAnchorA

The local anchor point relative to bodyA's origin.

b2Vec2 localAnchorB

The local anchor point relative to bodyB's origin.

---

The documentation for this struct was generated from the following files:

• Box2D/Dynamics/Joints/b2DistanceJoint.h
• Box2D/Dynamics/Joints/b2DistanceJoint.cpp