The Great Escape: Routine at 68F4

68F4: Enter room

This is called when the hero should enter a room. It resets the game window position, expands out the room definition into tile references then plots those tiles, centres the map position, sets an appropriate sprite for the hero (walk or crawl), sets up movable items then zoomboxes the scene onto the screen and boosts the score by one. Finally it squashes the stack and jumps to the main loop. Used by the routines at transition, main_loop_setup, keyscan_break and reset_game.
enter_room	68F4	LD HL,$0000	Reset the game_window_offset X and Y coordinates to zero
	68F7	LD ($A7C7),HL	Reset the game_window_offset X and Y coordinates to zero
	68FA	CALL setup_room	Setup the room
	68FD	CALL plot_interior_tiles	Render visible tiles array into the screen buffer
	6900	LD HL,$EA74	Set the map_position to (116,234)
	6903	LD ($81BB),HL	Set the map_position to (116,234)
	6906	CALL set_hero_sprite_for_room	Set appropriate sprite for the room (standing or crawl)
	6909	LD HL,$8000	Reset the hero's screen position
	690C	CALL calc_vischar_iso_pos_from_vischar	Reset the hero's screen position
	690F	CALL setup_movable_items	Setup movable items
	6912	CALL zoombox	Zoombox the scene onto the screen
	6915	LD B,$01	Increment score by one
	6917	CALL increase_score	Increment score by one
FALL THROUGH into squash_stack_goto_main.