Class that has everything pertaining to a 2D world. Class that has everything pertaining to a 2D world. A physics space, a visual scenario and a sound space. 2D nodes register their resources into the current 2D world. $DOCS_URL/tutorials/physics/ray-casting.html The [RID] of this world's canvas resource. Used by the [RenderingServer] for 2D drawing. Direct access to the world's physics 2D space state. Used for querying current and potential collisions. When using multi-threaded physics, access is limited to [method Node._physics_process] in the main thread. The [RID] of this world's navigation map. Used by the [NavigationServer2D]. The [RID] of this world's physics space resource. Used by the [PhysicsServer2D] for 2D physics, treating it as both a space and an area.