just experimenting with some things, I might make a 3d engine sometime in the future fills a triangle in an optimized way, press space to see options all this does is use some math I kind of understand but not really to draw the incircle of the triangle to fill the most space, then draw increasingly smaller lines around it to fill the rest of the space.
used this vid -> https://www.youtube.com/watch?v=HFJQFeQuV-E the video goes over the method @ChromeCat, @-Rex-, and @Geotale use for their triangle fillers