Provides parameters for [method PhysicsServer2D.body_test_motion]. By changing various properties of this object, such as the motion, you can configure the parameters for [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. Use [method CollisionObject2D.get_rid] to get the [RID] associated with a [CollisionObject2D]-derived node. 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. If set to [code]true[/code], any depenetration from the recovery phase is reported as a collision; this is used e.g. by [CharacterBody2D] for improving floor detection during floor snapping. If set to [code]false[/code], only collisions resulting from the motion are reported, which is generally the desired behavior.