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/*
* This file is part of din.
*
* din is copyright (c) 2006 - 2012 S Jagannathan <jag@dinisnoise.org>
* For more information, please visit http://dinisnoise.org
*
* din 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 2 of the License, or
* (at your option) any later version.
*
* din 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 din. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef __box
#define __box
#include <algorithm>
template <typename T> struct box {
T left, bottom;
T right, top;
T width, height;
T midx, midy;
double width_1, height_1;
box () {
left = bottom = right = top = width = height = 0;
width_1 = height_1 = 0.0;
}
box (T l, T b, T r, T t) {
operator() (l, b, r, t);
}
inline void operator() (T l, T b, T r, T t) {
left = l;
bottom = b;
right = r;
top = t;
calc ();
}
inline void calc () {
if (left > right) std::swap (left, right);
if (bottom > top) std::swap (bottom, top);
width = right - left;
height = top - bottom;
midx = left + width / 2;
midy = bottom + height / 2;
if (width != 0) width_1 = 1.0 / width;
if (height != 0) height_1 = 1.0 / height;
}
inline void move (T dx, T dy) {
left += dx;
right += dx;
bottom += dy;
top += dy;
calc ();
}
inline void resize (T dx, T dy) {
right += dx;
top += dy;
calc ();
}
inline void lower_corner (T x, T y) {
left = x;
bottom = y;
right = left + width;
top = bottom + height;
calc ();
}
};
template <typename T> inline bool inbox (const box<T>& b, const T& x, const T& y) {
return ((x >= b.left) && (x <= b.right) && (y >= b.bottom) && (y <= b.top));
}
#endif
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