GrooveJoint2D

Groove constraint for 2D physics.

Groove constraint for 2D physics. This is useful for making a body “slide” through a segment placed in another.

The body B’s initial anchor position defined by the joint’s origin and a local offset along the joint’s Y axis (along the groove).

• float length

The groove’s length. The groove is from the joint’s origin towards along the joint’s local Y axis.