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Replace checking for ZeroDivisionError with checking for minimal distance

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This commit is contained in:
Alexey Zakharenkov 2019-01-15 11:14:05 +03:00
parent 814c2accc0
commit 1d84d6cb38
1 changed files with 2 additions and 3 deletions
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5
subway_structure.py
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@ -69,10 +69,9 @@ def project_on_line(p, line):
def project_on_segment(p, p1, p2):
dp = (p2[0] - p1[0], p2[1] - p1[1])
d2 = dp[0]*dp[0] + dp[1]*dp[1]
try:
u = ((p[0] - p1[0])*dp[0] + (p[1] - p1[1])*dp[1]) / d2
except ZeroDivisionError:
if d2 < 1e-14:
return None
u = ((p[0] - p1[0])*dp[0] + (p[1] - p1[1])*dp[1]) / d2
res = (p1[0] + u*dp[0], p1[1] + u*dp[1])
if res[0] < min(p1[0], p2[0]) or res[0] > max(p1[0], p2[0]):
return None