Parallel Curves of Cubic Béziers
If you're like me and first got hung up on the difference between a parallel curve and a translation of the curve, the wikipedia article (literally the first link) explains it.My understanding is that a parallel curve is what you get if you dilate the curve with a circle, ie the curve along the furthest extent of the dilation (see the picture in the wikipedia article) which evidently is not the same as just translating the curve down.https://en.m.wikipedia.org/wiki/Parallel_curve