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[interpolatable] Don't report kinks for sharp corners

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This commit is contained in:
Behdad Esfahbod 2023-11-26 10:58:59 -07:00
parent 0e1113c1bb
commit ae0fac9297
1 changed files with 6 additions and 0 deletions
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6
Lib/fontTools/varLib/interpolatable.py
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@ -881,6 +881,12 @@ def test_gen(
# Not colinear / not smooth. # Not colinear / not smooth.
continue continue
# Check the mid-point is actually, well, in the middle.
dot0 = d0_prev.real * d0_next.real + d0_prev.imag * d0_next.imag
dot1 = d1_prev.real * d1_next.real + d1_prev.imag * d1_next.imag
if dot0 < 0 or dot1 < 0:
continue
mid = (pt0 + pt1) / 2 mid = (pt0 + pt1) / 2
mid_prev = (pt0_prev + pt1_prev) / 2 mid_prev = (pt0_prev + pt1_prev) / 2
mid_next = (pt0_next + pt1_next) / 2 mid_next = (pt0_next + pt1_next) / 2