Parameters to be sent to a 2D body motion test. This class contains parameters used in [method PhysicsServer2D.body_test_motion]. If set to [code]true[/code], shapes of type [constant PhysicsServer2D.SHAPE_SEPARATION_RAY] are used to detect collisions and can stop the motion. Can be useful when snapping to the ground. If set to [code]false[/code], shapes of type [constant PhysicsServer2D.SHAPE_SEPARATION_RAY] are only used for separation when overlapping with other bodies. That's the main use for separation ray shapes. Optional array of body [RID] to exclude from collision. Optional array of object unique instance ID to exclude from collision. See [method Object.get_instance_id]. Transform in global space where the motion should start. Usually set to [member Node2D.global_transform] for the current body's transform. Increases the size of the shapes involved in the collision detection. Motion vector to define the length and direction of the motion to test.