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add error message

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Justin Lin
2021-05-16 09:50:53 +08:00
parent f2bf6bcaba
commit 6d9e2d0822
1 changed files with 4 additions and 3 deletions
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7
src/_impl/_bijection_offset_impl.scad
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@@ -47,10 +47,11 @@ function _bijection_offset_impl(pts, d, epsilon) =
let( let(
this_edge = offset_es[i], this_edge = offset_es[i],
next_edge = offset_es[i + 1], next_edge = offset_es[i + 1],
p = __line_intersection2(this_edge, next_edge, epsilon) p = __line_intersection2(this_edge, next_edge, epsilon),
// p == p to avoid [nan, nan], because [nan, nan] != [nan, nan],
_ = assert(p != [] && p == p, "bijection_offset failed. Parallel or conincident edges found")
) )
// p == p to avoid [nan, nan], because [nan, nan] != [nan, nan] p
if(p != [] && p == p) p
] ]
); );