nerdcruft/libcruft-util
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point: use vector operations for distance functions

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This commit is contained in:
Danny Robson 2016-12-21 20:22:56 +11:00
parent a7caea16e1
commit e6115eb234
1 changed files with 2 additions and 12 deletions
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14
point.ipp
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@ -74,12 +74,7 @@ template <size_t S, typename T, typename U>
constexpr typename std::common_type<T,U>::type
util::distance2 (point<S,T> a, point<S,U> b)
{
typename std::common_type<T,U>::type sum {0};
for (size_t i = 0; i < S; ++i)
sum += pow2 (a.data[i] - b.data[i]);
return sum;
return sum (pow2 (a - b));
}
@ -112,12 +107,7 @@ template <size_t S, typename T, typename U>
constexpr typename std::common_type<T,U>::type
util::manhattan (point<S,T> a, point<S,U> b)
{
typename std::common_type<T,U>::type sum {0};
for (size_t i = 0; i < S; ++i)
sum += util::abs (a.data[i] - b.data[i]);
return sum;
return sum (abs (a - b));
}