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[Path] improve robustness of intersection calculations

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jan 2026-03-09 01:09:37 -07:00
commit 6c96968341
1 changed files with 4 additions and 4 deletions
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masque/shapes/path.py
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@ -344,11 +344,11 @@ class Path(Shape):
bs = v[1:-1] - v[:-2] + perp[1:] - perp[:-1]
ds = v[1:-1] - v[:-2] - perp[1:] + perp[:-1]
rp = numpy.linalg.solve(As, bs[:, :, None])[:, 0]
rn = numpy.linalg.solve(As, ds[:, :, None])[:, 0]
rp = numpy.linalg.lstsq(As, bs[:, :, None], rcond=1e-12)[0][:, 0, 0]
rn = numpy.linalg.lstsq(As, ds[:, :, None], rcond=1e-12)[0][:, 0, 0]
intersection_p = v[:-2] + rp * dv[:-1] + perp[:-1]
intersection_n = v[:-2] + rn * dv[:-1] - perp[:-1]
intersection_p = v[:-2] + rp[:, None] * dv[:-1] + perp[:-1]
intersection_n = v[:-2] + rn[:, None] * dv[:-1] - perp[:-1]
towards_perp = (dv[1:] * perp[:-1]).sum(axis=1) > 0 # path bends towards previous perp?
# straight = (dv[1:] * perp[:-1]).sum(axis=1) == 0 # path is straight