| 摘要 |
A method for drawing figures in a graphic display system provided with at least a display, a main storing unit for holding graphic information, and a controlling unit for controlling the transferring of information between the display and the main storing unit and for controlling the processing of information. The main storing unit (3) has a graphic information space (31), a complement space (32), and a transformation space (33). The graphic information space (31) stores graphic information in the form of sets of unit figures (310) each of which is formed with two sides of two contour lines connecting equi-brightnesses and two sides connecting the ends of the two contour lines. The complement space (32) stores the data for complementing the brightnesses of the spaces of the respective unit figures. The transformation space (33) stores the data for transforming the coordinates of the vertexes of a unit figure to execute figure transformation. During the drawing of a figure on the display, in order to transform a unit figure, the following operations are performed. According to the data read out from the complement space, the brightness thereof is so complemented as to increase from the one contour line to the other gradually. Next, according to the data read out from the transformation space, the coordinates of the vertexes of the unit figure are moved based on predetermined transformation equations. |
