How are these paths achieved?

1

I’ve been doing a bit of research for a typeface I’m developing, and looking at the construction of a few other typefaces. I came across something I haven’t seen before, where it seems all of the paths are drawn as straight lines, and then the curves have been non-destructively added. If I move the points the path responds. It doesn’t seem to be made up of corner components. I’m just curious, how do you do this?

Screenshot 2023-02-01 at 11.03.16
Screenshot 2023-02-01 at 11.03.161922×1126 143 KB

Screenshot 2023-02-01 at 11.07.18
Screenshot 2023-02-01 at 11.07.181868×1154 140 KB

2

These quadratic outlines, used in TTF fonts. AFAIK you can’t draw with quadratic curves in Glyphs, but you can convert the drawn paths in the Path menu.

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3

These are quadratic Bézier outlines which are used by TrueType-flavor fonts. You can convert them to the conventional cubic Bézier outlines with Path → Other → Convert to Cubic.

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4

Thanks! Super helpful to know!