Groove constraint for 2D physics.
- float initial_offset - The body B’s initial anchor position defined by the joint’s origin and a local offset initial_offset along the joint’s y axis (along the groove). Default value:
- float length - The groove’s length. The groove is from the joint’s origin towards length along the joint’s local y axis. Default value:
Groove constraint for 2D physics. This is useful for making a body “slide” through a segment placed in another.