<?xml version="1.0" encoding="UTF-8" ?> <class name="GrooveJoint2D" inherits="Joint2D" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd"> <brief_description> A physics joint that restricts the movement of two 2D physics bodies to a fixed axis. </brief_description> <description> A physics joint that restricts the movement of two 2D physics bodies to a fixed axis. For example, a [StaticBody2D] representing a piston base can be attached to a [RigidBody2D] representing the piston head, moving up and down. </description> <tutorials> </tutorials> <members> <member name="initial_offset" type="float" setter="set_initial_offset" getter="get_initial_offset" default="25.0"> The body B's initial anchor position defined by the joint's origin and a local offset [member initial_offset] along the joint's Y axis (along the groove). </member> <member name="length" type="float" setter="set_length" getter="get_length" default="50.0"> The groove's length. The groove is from the joint's origin towards [member length] along the joint's local Y axis. </member> </members> </class>