c++๋กœ 3d๋ชจ์ž‘ ๋‘์–ด๊ฐœ ํ–ˆ๋Š”๋ฐ ์—”์ง„์œผ๋กœ๋„ ๋งŒ๋“ค์–ด์•ผํ•จ?