Yeah, writing a scanline rasterizer from scratch is fun. For beginners, I advocate the sample-based approach I've written about, as functional "is inside shape"

Yeah, writing a scanline rasterizer from scratch is fun. For beginners, I advocate the sample-based approach I've written about, as functional "is inside shape" can be easier to reason about for simple cases. It's harder for non-convex polygons though :) https://magcius.github.io/xplain/article/rast1.html https://magcius.github.io/xplain/article/rast1.html The edge cases are similar -- precision in computing the path intersections and winding curves.