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[qu2cu] Comment

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This commit is contained in:
Behdad Esfahbod 2023-02-16 20:25:59 -07:00
parent 9a7e042f01
commit 3a3b8af154
1 changed files with 5 additions and 3 deletions
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8
Lib/fontTools/qu2cu/qu2cu.py
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@ -156,7 +156,7 @@ def quadratic_to_curves(p, tolerance=0.5):
if not is_complex:
p = [complex(x, y) for (x, y) in p]
# if spline has more than one offcurve, insert interpolated oncurves
# If spline has more than one offcurve, insert interpolated oncurves
q = list(p)
count = 0
num_offcurves = len(p) - 2
@ -173,7 +173,7 @@ def quadratic_to_curves(p, tolerance=0.5):
elevate_quadratic(*q[i : i + 3]) for i in range(0, len(q) - 2, 2)
]
# Dynamic- Programming to find the solution with fewest number of
# Dynamic-Programming to find the solution with fewest number of
# cubic curves, and within those the one with smallest error.
sols = [(0, 0, 0)] # (best_num_segments, best_error, start_index)
for i in range(1, len(elevated_quadratics) + 1):
@ -183,9 +183,11 @@ def quadratic_to_curves(p, tolerance=0.5):
# Fit elevated_quadratics[j:i] into one cubic
curve, ts = merge_curves(elevated_quadratics[j:i])
# Knot errors
# Now reconstruct the segments from the fitted curve
reconstructed_iter = splitCubicAtTC(*curve, *ts)
reconstructed = []
# Knot errors
error = 0
for k, reconst in enumerate(reconstructed_iter):
orig = elevated_quadratics[j + k]