| 摘要 |
PURPOSE:To decrease the number of using memories and to improve the data transfer performance by showing the data on the coordinate positions of a closed pattern at the apex positions of some continuous triangles. CONSTITUTION:When a closed pattern is divided into triangles and stored, the triangles adjacent to each other on a memory are also adjacent as patterns with a side shared in many cases. In such a case, two of three apexes are equal between both adjacent triangles. Therefore it is possible to omit the data corresponding to two apexes among three of the low-order triangle on the memory. Thus a command showing the continuous triangles and one apex display a triangle. For instance, flags 50-52 are all set at ''0'' with a command 31 which defines first a triangle. While two of flags 50-52 is equal to 1 with the rest one set at ''0'' with commands 32-35 which define a trinangle that shares two spexes with the immediately preceding triangle. Then one of flags 50-52 is equal to ''0'' with the rest wo set at 1 with a command that defines a triangle sharing an apex with the immediately preceding triangle. |
