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[interpolatable] Comment

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This commit is contained in:
Behdad Esfahbod 2023-11-19 15:07:54 -07:00
parent bb29f43c46
commit f3faff7b0d
1 changed files with 9 additions and 0 deletions
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9
Lib/fontTools/varLib/interpolatable.py
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@ -461,7 +461,16 @@ def test_gen(
identity_matching = list(range(len(m0Control)))
# We try matching both the StatisticsControlPen vector
# and the StatisticsPen vector.
# If either method found a identity matching, accept it.
# This is crucial for fonts like Kablammo[MORF].ttf and
# Nabla[EDPT,EHLT].ttf, since they really confuse the
# StatisticsPen vector because of their area=0 contours.
#
# TODO: Optimize by only computing the StatisticsPen vector
# and then checking if it is the identity vector. Only if
# not, compute the StatisticsControlPen vector and check both.
costsControl = [
[_vdiff_hypot2(v0, v1) for v1 in m1Control] for v0 in m0Control