[jacobolus]

Bresenham’s line algorithm works pretty well for how simple it is (especially assuming you are rendering on a CPU, circa 1970 – with GPUs available on every device it’s an anachronism which only persists through historical inertia), but rendering lines using supersampling on some not-so-rectangular grid and then using a high-quality antialiasing filter to integrate the samples looks strictly better every time, especially if you have a large number of thin lines. If you’re just rendering a couple simple shapes it probably doesn’t matter too much. If you’re trying to render a map or something then using better techniques makes a big difference.

[Unfortunately, even in the best case antialiased slightly diagonal straight lines look pretty shitty on a pixel display, regardless of what technique you use, up until you get to a pretty high resolution. Just an inherent issue with pixel grids.]

This paper is the overall most promising one I’ve seen in the field: http://w3.impa.br/~diego/projects/GanEtAl14/

[jtxx000]

Very cool paper.