Class that has everything pertaining to a 2D world. Class that has everything pertaining to a 2D world. A physics space, a visual scenario, a navigation map and a sound space. 2D nodes register their resources into the current 2D world. $DOCS_URL/tutorials/physics/ray-casting.md 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 [code]_physics_process(delta)[/code] in the main thread. The [RID] of this world's navigation map. Used by the [Navigation2DServer]. The [RID] of this world's physics space resource. Used by the [Physics2DServer] for 2D physics, treating it as both a space and an area. The [RID] of this world's vertex light 2d space resource. Used by the [VertexLights2DServer] for static 2D lights. If the vertex lights 2d module is not enabled this will just return an empty RID.