| 摘要 |
PROBLEM TO BE SOLVED: To attain an expression of clouds consistent to the position of a virtual camera or a change in visual line direction.SOLUTION: An initial setting section 616 sets initial data 950 when a game is started, a small cloud drawing section 632 generates a small cloud texture 102 by composing a cloud part A (122), a cloud part B (124) and an air flow texture 104 based on a pitch angle X of the virtual camera 100. A middle could generation section 612 and a middle could drawing section 634 generate a middle cloud texture based on the initial data 950 and the small cloud texture 102. A could sea generation section 618 and a cloud sea drawing section 640 generate, based on the initial data 950 and the middle cloud texture, an image for one frame including cloud sea by arranging a middle cloud billboard within a cloud sea setting area R. |
