PURPOSE: To give a mass with each area as the unit and to quickly draw an image by dividing a three-dimensional object into primitives which can be quickly drawn and gradually changing the lightness and the chromaticity based on them to draw the image.
CONSTITUTION: A primitive generating part 1 which divides the three- dimensional object into prescribed graphics to generate primitives and a gradation drawing part 3 which draws the image while gradually changing the lightness and the chromaticity based on these generated primitives are provided, and the primitive generating part 1 divides the three-dimensional object into prescribed graphics to generate respective primitives in response to the drawing request, and the gradation drawing part 3 draws the image while gradually changing the lightness and the chromaticity based on these primitives.
KATSUMATA AKIYOSHI
SHIMAMURA MAKIKO
TATENO TAKANORI
| JPS6274159A | 1987-04-04 | |||
| JPH02110674A | 1990-04-23 | |||
| JPS6252684A | 1987-03-07 |