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add LengthSqr

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This commit is contained in:
aozhiwei 2019-03-18 17:40:08 +08:00
parent 128aab9252
commit 1eaf2da087
1 changed files with 6 additions and 0 deletions
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6
a8/sysutils.h
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@ -48,6 +48,12 @@ namespace a8
return v < hi ? (v > lo ? v : lo) : hi; return v < hi ? (v > lo ? v : lo) : hi;
} }
template <typename T>
const T& LengthSqr(const T& v)
{
return v.x * v.x + v.y * v.y;
}
template <typename T> template <typename T>
void SetToVector(std::set<T>& set_v, std::vector<T>& vector_v) void SetToVector(std::set<T>& set_v, std::vector<T>& vector_v)
{ {