HP 5961-0509 manual Counting the Points in a Polygon

If you multiply 512 points by 8 bytes per point, the result is 4096 bytes (4 Kbytes). That means the minimum your printer can store in the polygon buffer is 4 Kbytes. That is the worst case, however. Unless the printer has a substantial amount of fonts, macros, or graphics already downloaded into user memory, you can put much more into the polygon buffer. As we just calculated, for every 4 Kbytes of extra unused user memory, the polygon buffer can store 512 more points. You can see how in most cases there is little chance of a polygon buffer overflow, especially with the addition of optional printer memory.

The following formula explains how to calculate the buffer space used by a polygon:

number of points in polygon × 8 = buffer space consumed by polygon''

Counting the Points in a Polygon

The starting pen location and each subsequent point define a polygon. As shown in the following illustration, a rectangle is defined by five points, not four. This is because the starting location is counted again as the ending location.

Figure 21-10

EN Drawing Polygons 21-15