> I have an algorithm I'm testing for the tilde unflattening. I went > with doing it before all steps, because it worked better with my > idea, but the function af_glyph_hints_align_weak_points is undoing > my changes.
Hmm. Have you checked the OpenType specification how the IUP instruction works? https://learn.microsoft.com/en-us/typography/opentype/spec/tt_instructions#interpolate-untouched-points-through-the-outline Have you 'touched' the points you move (i.e., setting `AF_FLAG_TOUCH_Y`) so that `af_glyph_hints_align_weak_points` doesn't move them again? Werner
