| 摘要 |
PROBLEM TO BE SOLVED: To represent movement to some extent only by a background screen without having a pattern of an object by representing a spray such as ink spurted out of a squid, the smoke of a volcano, and a scatter of an agricultural chemical or a state wherein scattered bodies spread by means of the zooming process in which a screen drawn almost in an isosceles triangle shape is contracted or expanded in the direction of the short side. SOLUTION: A character of squid's ink is displayed by vertically reducing the screen A which is drawn almost in the isosceles triangle shape. This is performed by a zooming circuit 4d. While the screen A is vertically expanded, lateral movement is represented through the raster process of a line scrolling process part 4e. Then the screen A and a screen B where the character of a squid is drawn are displayed one over the other and the lightness of the screen B is lowered to represent a state wherein the squid is in the ink. Thus, the state that the ink of the squid spreads can be represented by the zooming process which contracts or expands the screen A toward the short side. |
