libcruft-util/extent.cpp

118 lines
2.8 KiB
C++

/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2010 Danny Robson <danny@nerdcruft.net>
*/
#include "extent.hpp"
#include "debug.hpp"
#include "maths.hpp"
#include <cmath>
using namespace util;
//-----------------------------------------------------------------------------
template <typename T>
extent<T>::extent (const T _width, const T _height):
width (_width),
height (_height)
{ ; }
template <typename T>
extent<T>::extent (const extent<T> &rhs):
width (rhs.width),
height (rhs.height)
{ ; }
template <typename T>
extent<T>&
extent<T>::operator= (const extent<T> &rhs) {
width = rhs.width;
height = rhs.height;
return *this;
}
//-----------------------------------------------------------------------------
template <typename T>
T
extent<T>::diameter (void) const {
return (T)sqrt (width * width + height * height);
}
template <typename T>
T
extent<T>::area (void) const
{ return width * height; }
//-----------------------------------------------------------------------------
template <typename T>
double
extent<T>::aspect (void) const
{ return static_cast<double> (width) / height; }
//-----------------------------------------------------------------------------
template <typename T>
bool
extent<T>::empty (void) const
{ return almost_equal (area(), 0); }
//-----------------------------------------------------------------------------
template <typename T>
bool
extent<T>::operator ==(const extent& rhs) const {
return almost_equal (width, rhs.width) &&
almost_equal (height, rhs.height);
}
//-----------------------------------------------------------------------------
template <typename T>
void
extent<T>::sanity (void) const
{ CHECK (width >= 0 && height >= 0); }
namespace util {
template <>
void
extent<unsigned int>::sanity (void) const
{ return; }
template <>
void
extent<unsigned long>::sanity (void) const
{ return; }
}
//-----------------------------------------------------------------------------
namespace util {
template struct extent<unsigned int>;
template struct extent<unsigned long>;
template struct extent<double>;
}