"Of all the enemies to public liberty war is, perhaps, the most to be dreaded because it comprises and develops the germ of every other. War is the parent of armies; from these proceed debts and taxes known instruments for bringing the many under the domination of the few. No nation could preserve its freedom in the midst of continual warfare."
- James Madison

GPAA explained
Monday, March 14, 2011 | Permalink

I've added an illustration for the GPAA technique with a little more explanation in the demo description.

The wide line is the geometric edge. The arrows show how the neighbor pixel is chosen. The dashed lines shows the value of line equation for that pixel, which is used to compute the coverage value.