libcruft-util/extent.ipp

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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
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* http://www.apache.org/licenses/LICENSE-2.0
*
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2015-2017 Danny Robson <danny@nerdcruft.net>
*/
#ifdef __UTIL_EXTENT_IPP
#error
#endif
#define __UTIL_EXTENT_IPP
#include <algorithm>
#include <limits>
///////////////////////////////////////////////////////////////////////////////
template <size_t S, typename T>
constexpr
T
util::extent<S,T>::diameter (void) const
{
return static_cast<T> (
std::sqrt (
std::accumulate (std::begin (this->data),
std::end (this->data),
T {0},
[] (auto a, auto b) { return a + b * b; })
)
);
}
///////////////////////////////////////////////////////////////////////////////
template <size_t S, typename T>
constexpr
T
util::extent<S,T>::area (void) const
{
return std::accumulate (std::begin (this->data),
std::end (this->data),
T {1},
std::multiplies<T> ());
}
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///////////////////////////////////////////////////////////////////////////////
template <size_t S, typename T>
template <typename U>
constexpr
U
util::extent<S,T>::aspect (void) const
{
return static_cast<U> (this->w) / this->h;
}
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///////////////////////////////////////////////////////////////////////////////
template <size_t S, typename T>
constexpr
util::extent<S,T>
util::extent<S,T>::max (void)
{
return extent<S,T> {
std::numeric_limits<T>::max ()
};
}
//-----------------------------------------------------------------------------
template <size_t S, typename T>
constexpr
util::extent<S,T>
util::extent<S,T>::min (void)
{
return extent<S,T> { 0 };
}