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fix div/0 in libnest2D

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supermerill/SuperSlicer#2053
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supermerill 2021-12-15 19:28:35 +01:00
parent 497736affe
commit 269ade4859
1 changed files with 3 additions and 2 deletions
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5
src/libnest2d/include/libnest2d/geometry_traits_nfp.hpp
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@ -281,9 +281,10 @@ inline NfpResult<RawShape> nfpConvexOnly(const RawShape& sh,
// cos function. But with the quadrant info we can get the sign back
int sign = q[0] == 1 || q[0] == 2 ? -1 : 1;
// supermerill: add safe-check for when two points are on the same position
// If Ratio is an actual rational type, there is no precision loss
auto pcos1 = Ratio(lcos[0]) / lsq1 * sign * lcos[0];
auto pcos2 = Ratio(lcos[1]) / lsq2 * sign * lcos[1];
auto pcos1 = lsq1 != 0 ? Ratio(lcos[0]) / lsq1 * sign * lcos[0] : 1 * sign * lcos[0];
auto pcos2 = lsq2 != 0 ? Ratio(lcos[1]) / lsq2 * sign * lcos[1] : 1 * sign * lcos[1];
return q[0] < 2 ? pcos1 < pcos2 : pcos1 > pcos2;
}