b2DistanceJointDef Struct Reference

#include <b2DistanceJoint.h>

Inheritance diagram for b2DistanceJointDef:

Collaboration diagram for b2DistanceJointDef:

List of all members.

Public Member Functions
void	Initialize (b2Body *bodyA, b2Body *bodyB, const b2Vec2 &anchorA, const b2Vec2 &anchorB)
Public Attributes
b2Vec2	localAnchorA
	The local anchor point relative to bodyA's origin.
b2Vec2	localAnchorB
	The local anchor point relative to bodyB's origin.
float32	length
	The natural length between the anchor points.
float32	frequencyHz
float32	dampingRatio
	The damping ratio. 0 = no damping, 1 = critical damping.

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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.

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Member Function Documentation

void b2DistanceJointDef::Initialize	(	b2Body *	bodyA,
		b2Body *	bodyB,
		const b2Vec2 &	anchorA,
		const b2Vec2 &	anchorB
	)

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

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Member Data Documentation

float32 b2DistanceJointDef::dampingRatio

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

float32 b2DistanceJointDef::frequencyHz

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

float32 b2DistanceJointDef::length

The natural length between the anchor points.

b2Vec2 b2DistanceJointDef::localAnchorA

The local anchor point relative to bodyA's origin.

b2Vec2 b2DistanceJointDef::localAnchorB

The local anchor point relative to bodyB's origin.

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

• b2DistanceJoint.h