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[interpolatable] Add --kinkiness

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This commit is contained in:
Behdad Esfahbod 2023-11-25 14:46:43 -07:00
parent 1ff792d2b4
commit 9e1842a8a8
1 changed files with 14 additions and 3 deletions
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17
Lib/fontTools/varLib/interpolatable.py
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@ -326,8 +326,11 @@ def test_gen(
*,
locations=None,
tolerance=DEFAULT_TOLERANCE,
kinkiness=0,
show_all=False,
):
assert 0 <= tolerance <= 1
if names is None:
names = glyphsets
@ -864,8 +867,9 @@ def test_gen(
if not cross0 or not cross1:
continue
mult = 2
t = (1 - tolerance) * mult # ~sin(radian(6)) for tolerance 0.95
assert -1 <= kinkiness <= 1
mult = 2 - kinkiness
t = (1 - tolerance) * mult # ~sin(radian(6)) for tolerance 0.95 & kinkiness 0
cross0 /= abs(pt0 - pt0_prev) * abs(pt0_next - pt0)
cross1 /= abs(pt1 - pt1_prev) * abs(pt1_next - pt1)
@ -963,7 +967,13 @@ def main(args=None):
"--tolerance",
action="store",
type=float,
help="Error tolerance. Default %s" % DEFAULT_TOLERANCE,
help="Error tolerance. Between 0 and 1. Default %s" % DEFAULT_TOLERANCE,
)
parser.add_argument(
"--kinkiness",
action="store",
type=float,
help="How aggressive report kinks. Between -1 and 1. Default 0",
)
parser.add_argument(
"--json",
@ -1198,6 +1208,7 @@ def main(args=None):
locations=locations,
ignore_missing=args.ignore_missing,
tolerance=args.tolerance or DEFAULT_TOLERANCE,
kinkiness=args.kinkiness or 0,
show_all=args.show_all,
)
problems = defaultdict(list)