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point: add redim with fill

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This commit is contained in:
Danny Robson 2015-01-13 18:40:22 +11:00
parent 64c11bdcb0
commit 917ab8fc8e
2 changed files with 24 additions and 1 deletions
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1
point.hpp
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@ -57,6 +57,7 @@ namespace util {
bool operator== (const point<S,T>&) const; bool operator== (const point<S,T>&) const;
template <size_t D> point<D,T> redim (void) const; template <size_t D> point<D,T> redim (void) const;
template <size_t D> point<D,T> redim (const util::point<D,T> &fill) const;
static const point<S,T> ORIGIN; static const point<S,T> ORIGIN;

24
point.ipp
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@ -68,7 +68,29 @@ namespace util {
template<size_t D> template<size_t D>
point<D,T> point<S,T>::redim (void) const { point<D,T> point<S,T>::redim (void) const {
point<D,T> out; point<D,T> out;
std::copy (std::begin (this->data), std::begin (this->data) + D, std::begin (out.data)); std::copy_n (std::begin (this->data),
min (S, D),
std::begin (out.data));
return out;
}
//-------------------------------------------------------------------------
template<size_t S, typename T>
template<size_t D>
point<D,T> point<S,T>::redim (const point<D,T> &fill) const {
point<D,T> out;
static constexpr auto L1 = min (S, D);
static constexpr auto L2 = D - L1;
std::copy_n (std::begin (this->data),
L1,
std::begin (out.data));
std::copy_n (fill.data + L1,
L2,
out.data + L1);
return out; return out;
} }
} }