Template. Shows or hides the world view W = WORLD_DISPLAY(W[, VISIBLE]) Shows or hides the view corresponding to the world. This function is a template and performs no operations. A new world type which a visual representation must implement this function under the name <world_type>_display. This functions' input and output argument(s) must conform to the specifications below. New arguments may be added, but they must be made optional. Parameters: W - the world VISIBLE - (optional) whether the view should be shown (1) or hidden (0). By default, the view will be shown. Returns: W - the updated world See also world