Spring Joint 2D

The Spring Joint 2D component allows two Sprite objects controlled by rigidbody physics to be attached together as if by a spring. The spring will apply a force along its axis between the two objects, attempting to keep them a certain distance apart.

Collide ConnectedCan the two connected objects collide with each other?
Connected RigidbodyThe other Rigidbody2D object that the one with the joint is connected to. If this is null then the othen end of the spring will be fixed at a point in space.
AnchorCoordinate in local space where the end point of the spring is attached.
Connected AnchorCoordinate in the other object's local space where its end of the spring is attached.
DistanceThe distance that the spring should attempt to maintain between the two objects.
Damping RatioThe degree to which spring oscillation is suppressed.
FrequencyThe frequency at which the spring oscillates while the rigidbodies are approaching the desired separation distance (cycles per sec).


Both objects connected by the spring must have a Rigidbody 2D component attached (or alternatively, the other end of the spring can be fixed in space by setting Connected Rigidbody to null). When the spring applies its force between the objects, it will tend to overshoot the desired distance between them and then rebound repeatedly, resulting in a continuous oscillation. The damping parameter determines how quickly the oscillation will reduce and bring the objects to rest. The frequency is the rate at which the oscillates either side of the target distance; the higher the frequency, the stiffer the spring.

Page last updated: 2013-08-16