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I started working on a "stylus annotation program", and as part of it I need an algorithm that convert a path with width indicators to an outline. This is similar to the Advanced Outline Layer in the synfig program, and the Power Stroke path effect in Inkscape. I'm looking for a paper describing such an algorithm. Of course I can always read the source code, but I'd prefer a paper to understand the mathematics behind it.

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  • $\begingroup$ pomax.github.io/bezierinfo $\endgroup$
    – joojaa
    Jun 18, 2022 at 15:29
  • $\begingroup$ The nearest algorithm I know of is the one Metafont uses for this. I'm not sure if it's nicely summarized in a paper, but there are several chapters in Knuth's Digital Typography that provide details. Metafont is available as a "literate program", so the cweb version can generate a full book describing how the program works. $\endgroup$
    – luser droog
    Jun 19, 2022 at 3:16

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