Another property is that because it holds an integer numerator & denominator, there's no round-off errors in drawing the line. Now, we'll have to get some pret

Another property is that because it holds an integer numerator & denominator, there's no round-off errors in drawing the line. Now, we'll have to get some pretty high pixel counts for that to matter, but it's another interesting property vs accumulating a fixed or floating point calculated slope.