A spring with a damper. More...

Instance Methods
(id)	- initWithBodyA:bodyB:anchorA:anchorB:restLength:stiffness:damping:
	Initialize a damped spring between two bodies at the given anchor points. More...

Instance Methods inherited from ChipmunkConstraint
(void)	- preSolve:
	Override this method to update a constraints parameters just before running the physics each step.

(void)	- postSolve:
	Override this method to poll values from a constraint each frame after the physics runs. More...

Class Methods
(ChipmunkDampedSpring *)	+ dampedSpringWithBodyA:bodyB:anchorA:anchorB:restLength:stiffness:damping:
	Create an autoreleased damped spring between two bodies at the given anchor points. More...

Class Methods inherited from ChipmunkConstraint
(ChipmunkConstraint *)	+ constraintFromCPConstraint:
	Get the ChipmunkConstraint object associciated with a cpConstraint pointer. More...

Properties
cpVect	anchorA
	The anchor point on the first body.

cpVect	anchorB
	The anchor point on the second body.

cpFloat	restLength
	The length the spring wants to contract or expand to.

cpFloat	stiffness
	The young's modulus of the spring.

cpFloat	damping
	The amount of viscous damping to apply.

Properties inherited from ChipmunkConstraint
cpConstraint *	constraint
	Returns a pointer to the underlying cpConstraint C struct.

ChipmunkBody *	bodyA
	The first ChipmunkBody the constraint controls.

ChipmunkBody *	bodyB
	The second ChipmunkBody the constraint controls.

cpFloat	maxForce
	Maximum force this constraint is allowed to use (defalts to infinity). More...

cpFloat	errorBias
	The rate at which joint error is corrected. More...

cpFloat	maxBias
	Maximum rate (speed) that a joint can be corrected at (defaults to infinity). More...

BOOL	collideBodies
	Whether or not the connected bodies should checked for collisions. More...

cpFloat	impulse
	Get the most recent impulse applied by this constraint.

ChipmunkSpace *	space
	Get the space the body is added to.

id	userData
	An object that this constraint is associated with. More...

Detailed Description

A spring with a damper.

While a spring is not technically a constraint, the damper is. The spring forces are simply a convenience.

Method Documentation

+ (ChipmunkDampedSpring *) dampedSpringWithBodyA:	(ChipmunkBody *)	a
bodyB:	(ChipmunkBody *)	b
anchorA:	(cpVect)	anchorA
anchorB:	(cpVect)	anchorB
restLength:	(cpFloat)	restLength
stiffness:	(cpFloat)	stiffness
damping:	(cpFloat)	damping

Create an autoreleased damped spring between two bodies at the given anchor points.

Parameters

restLength	The length the spring wants to contract or expand to.
stiffness	The young's modulus of the spring.
damping	The amount of viscous damping to apply.

Initialize a damped spring between two bodies at the given anchor points.

Parameters

restLength	The length the spring wants to contract or expand to.
stiffness	The young's modulus of the spring.
damping	The amount of viscous damping to apply.

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