Fix pixel table.
Smaller lines so we won't run out of chars.
Have 16bit result.
Our set of hardwired colors.
Draw upper half of polygon pixel by pixel.
Halved Y resolution.
We'll need to count down the height to test if a row can be filled character-wise.
Don't calculate screen address in here.
Fill inside of polygon character-wise.
Moved vars to zeropage.
Cleanup.
Optimized screen address calculations.
Don't recalculate character line for each plotted pixel.

Don't draw over fillers starting lines.
Cleanup.
Have signed division for our slopes.
Lines and pixels to the attic.
Some last words.