Library of meshes. A library of meshes. Contains a list of [Mesh] resources, each with a name and ID. Each item can also include collision and navigation shapes. This resource is used in [GridMap]. Clears the library. Creates a new item in the library with the given ID. You can get an unused ID from [method get_last_unused_item_id]. Returns the first item with the given name. Returns the list of item IDs in use. Returns the item's mesh. Returns the item's name. Returns the item's navigation mesh. Returns the transform applied to the item's navigation mesh. When running in the editor, returns a generated item preview (a 3D rendering in isometric perspective). When used in a running project, returns the manually-defined item preview which can be set using [method set_item_preview]. Returns an empty [Texture] if no preview was manually set in a running project. Returns an item's collision shapes. The array consists of each [Shape] followed by its [Transform]. Gets an unused ID for a new item. Removes the item. Sets the item's mesh. Sets the item's name. This name is shown in the editor. It can also be used to look up the item later using [method find_item_by_name]. Sets the item's navigation mesh. Sets the transform to apply to the item's navigation mesh. Sets a texture to use as the item's preview icon in the editor. Sets an item's collision shapes. The array should consist of [Shape] objects, each followed by a [Transform] that will be applied to it. For shapes that should not have a transform, use [constant Transform.IDENTITY].