To prevent the extra 'backtracking' on a simple single stroke font perhaps some logic could be added that removes redundant paths? Kind of like how redundant paths are removed in complicated pocketing operations. For the fancier fonts that have flares to the ends of the lines, extra paths are added to 'fill' in the flare so you get the full effect of the font without needing to go deeper. As I mentioned there are TTF fonts that mimic single stroke fonts. For engraving in metal this idea would not work well. This actually looks really nice in wood though. When signmakers do text carved into a board they go deeper with the 'V' bit to make the stroke wider, so the ends of the stokes that are flared out are carved much deeper than other places. I'm not meaning to belabor the point but rather explain why nonstandard font don't work. Im working on an elegant way to make single line fonts which look right from True Type Fonts, it is a bit of a faff but it will give a true representation with a single line, something deleting geometry does not do on anything but the simplest fonts. That's the problem when you don't follow a standard. Google search CamBam Stick Fonts, a handy set of single line fonts free to download. The single stroke fonts from Featurecam do not adhere to the TTF standard so CamBam does not know how to use them. If it is not a closed loop than it is not a TTF font (so it won't work properly in 99.99% of programs that know how to work with TTFs). A TTF font MUST be a closed loop, otherwise it cannot be scaled and filled.
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