| 摘要 |
PURPOSE:To perform the hidden face processing of a semitransparent object by providing a transparency control part. CONSTITUTION:A hidden face processing part and a transparency control part 1 are provided. The transparency of a segment and segment information to be inputted to the hidden face processing part 2 are inputted to the control part 1, and the control part 1 holds a painting-out pattern in XY directions selected by the inputted transparency of the segment and validates inputted segment information by the transparency, the current scan line position, and respective M values of hidden face processors 2-1' and 2-2' and outputs it to N-number of hidden face processors 2-1' and 2-2'. That is, since segment information inputted to N-number of hidden face processors 2-1' and 2-2' is validated or invalidated by the transparency control part 1 in accordance with the transparency of the segment, the current scan line position, and M values, the hidden face processing of the semitransparent object is possible. |
