> Given this definition I think you almost never really want the parallel curve though (at least in computer graphics). Fonts want this a lot. It helps more t

> Given this definition I think you almost never really want the parallel curve though (at least in computer graphics). Fonts want this a lot. It helps more to think about this in terms of a closed curve. If you have an arbitrary closed cubic curve, what does it mean to make it "bigger", "smaller", "thicker", "thinner", etc. For example, a blob sticking out eventually needs to get "flattened" as you shrink the curve. A lot of the problem with 2D graphics currently is simply that we don't have good underpinning theory and, especially, definitions like we do for 3D graphics. If you don't even agree on what things mean, you can't generate a theory for how to do them.