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[interpolatable] In diff-contour-order, allow for 5% cost difference

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Reduces false-positives, as in this one in NotoSansArabic:

Glyph asteriskArt-ar was not compatible:
    Contour order differs: [0, 1, 2, 3, 4, 5] in NotoSansArabic-CondensedBold, [0, 3, 2, 1, 4, 5] in NotoSansArabic-CondensedLight
This commit is contained in:
Behdad Esfahbod 2022-03-31 19:52:48 -06:00
parent 3a846a5389
commit 745631d16b
1 changed files with 3 additions and 1 deletions
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4
Lib/fontTools/varLib/interpolatable.py
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@ -281,7 +281,9 @@ def test(glyphsets, glyphs=None, names=None):
continue
costs = [[_vlen(_vdiff(v0, v1)) for v1 in m1] for v0 in m0]
matching, matching_cost = min_cost_perfect_bipartite_matching(costs)
if matching != list(range(len(m0))):
identity_matching = list(range(len(m0)))
identity_cost = sum(costs[i][i] for i in range(len(m0)))
if matching != identity_matching and matching_cost < identity_cost * .95:
add_problem(
glyph_name,
{