Unexpected result when deleting a point that overlaps another point

[justvanrossum]

Deleting the point that is part of the curve but overlaps the next point results in an unexpected curve fitting. It looks like the algorithm isn't able to determine the angle in that case.

{"layerGlyphs":[{"layerName":"MutatorSansLightCondensed/foreground","location":{},"glyph":{"xAdvance":530,"path":{"coordinates":[117,784,260,840,386,852,386,788,386,773,386,734],"pointTypes":[0,2,2,8,0,0],"contourInfo":[{"endPoint":5,"isClosed":false}],"pointAttributes":null},"components":[],"anchors":[],"guidelines":[]}}]}

[justvanrossum]

This is the relevant code:

https://github.com/googlefonts/fontra/blob/a160bd2f9c9f57af3185f6e1f1ec1840a0e2524d/src/fontra/client/core/path-functions.js#L659-L664

[justvanrossum]

Hm, the solution wasn't really ideal, as it refits a curve that doesn't need refitting.