| 摘要 |
<p>PURPOSE: To reduce blurs on a drawn picture generated as the result of a calculation error in the calculation of a (z) value for hidden surface erasing process. CONSTITUTION: A pixel set integrating part 21 integrates a pixel included in a current drawn polygon as the pixel set of every comprehensive pixel number toward a scan line direction, and sets a representative pixel in each pixel set. A (z) value calculating part 22 determines the (z) value of the representative pixel of each pixel set, and sets the (z) values of all the pixels belonging to the pixel set to the same value as the (z) value of the representative pixel. A (z) value comparing means 3 compares the (z) value of each pixel stored in a (z) value storage means 5 with the (z) value of each pixel included in the current drawn polygon in a pixel unit. A drawing control means 4 collates this compared result with a hidden surface condition, and judges whether the current drawn polygon is to be drawn or not in respect of each pixel included in the current drawn polygon.</p> |
