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Stop intersectSegSegTest returning True for collinear line pairs

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justin
2026-03-12 13:37:56 +00:00
parent cdc21c9fb1
commit 65383e2303
15 changed files with 326 additions and 223 deletions
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src/Geometry/Intersect.hs
+4 -2
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@@ -151,8 +151,10 @@ intersectSegSegTest x y z w =
f x y z w && f z w x y && x /= y && z /= w
where
f a b c d =
(not (isRHS a b c) && not (isLHS a b d))
|| (not (isLHS a b c) && not (isRHS a b d))
-- (not (isRHS a b c) && not (isLHS a b d))
-- || (not (isLHS a b c) && not (isRHS a b d))
(isRHS a b c && isLHS a b d)
|| (isLHS a b c && isRHS a b d)
intersectSegSegPreTest ::
Point2 ->