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Merge pull request #69 from jmargeta/sweep_angle_tolerance

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Add tolerance to center finding
This commit is contained in:
Hamilton Kibbe 2017-06-12 07:59:39 -04:00 • committed by GitHub
commit 872c2db250
1 changed files with 7 additions and 4 deletions
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11
gerber/rs274x.py
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@ -765,14 +765,17 @@ class GerberParser(object):
# Calculate the radius error
sqdist_start = sq_distance(start, test_center)
sqdist_end = sq_distance(end, test_center)
sqdist_diff = abs(sqdist_start - sqdist_end)
# Take the option with the lowest radius error from the set of
# options with a valid sweep angle
if ((abs(sqdist_start - sqdist_end) < sqdist_diff_min)
and (sweep_angle >= 0)
and (sweep_angle <= math.pi / 2.0)):
# In some rare cases, the sweep angle is numerically (10**-14) above pi/2
# So it is safer to compare the angles with some tolerance
is_lowest_radius_error = sqdist_diff < sqdist_diff_min
is_valid_sweep_angle = sweep_angle >= 0 and sweep_angle <= math.pi / 2.0 + 1e-6
if is_lowest_radius_error and is_valid_sweep_angle:
center = test_center
sqdist_diff_min = abs(sqdist_start - sqdist_end)
sqdist_diff_min = sqdist_diff
return center
else:
return (start[0] + offsets[0], start[1] + offsets[1])