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Fix geom::intersection(segment,box) for axis-aligned segments

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Nikita Lisitsa 2022-06-19 22:25:56 +03:00
parent 0bddeaf865
commit 0cb197a6c4
1 changed files with 12 additions and 4 deletions
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16
libs/geom/include/psemek/geom/intersection.hpp
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@ -139,12 +139,20 @@ namespace psemek::geom
for (std::size_t i = 0; i < N; ++i) for (std::size_t i = 0; i < N; ++i)
{ {
T tmin = (b[i].min - s[0][i]) / (s[1][i] - s[0][i]); if (s[1][i] != s[0][i])
T tmax = (b[i].max - s[0][i]) / (s[1][i] - s[0][i]); {
T tmin = (b[i].min - s[0][i]) / (s[1][i] - s[0][i]);
T tmax = (b[i].max - s[0][i]) / (s[1][i] - s[0][i]);
if (tmin > tmax) std::swap(tmin, tmax); if (tmin > tmax) std::swap(tmin, tmax);
t &= interval<T>{tmin, tmax}; t &= interval<T>{tmin, tmax};
}
else
{
if (!contains(b[i], s[0][i]))
return interval<T>{};
}
} }
return t; return t;