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coord.hh
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coord.hh
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/* coord.hh
*
* Copyright 2009 Martin Read
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef LIBMRL_COORD_H
#define LIBMRL_COORD_H
#include "mathops.hh"
namespace libmrl
{
template <typename T> class basic_coord
{
public:
typedef basic_coord<T>& ref;
typedef const basic_coord<T>& const_ref;
typedef T& baseref;
typedef const T& const_baseref;
int y;
int x;
ref operator -=(const_ref right)
{
y -= right.y;
x -= right.x;
return *this;
}
ref operator +=(const_ref right)
{
y += right.y;
x += right.x;
return *this;
}
ref operator /=(const_baseref right)
{
y /= right;
x /= right;
return *this;
}
ref operator *=(const_baseref right)
{
y *= right;
x *= right;
return *this;
}
int distance(const_ref far) const
{
return libmrl::max(libmrl::abs(y - far.y), libmrl::abs(x - far.x));
};
bool operator < (const_ref right) const
{
return (y < right.y) || ((y == right.y) && (x < right.x));
}
bool operator > (const_ref right) const
{
return (y > right.y) || ((y == right.y) && (x > right.x));
}
bool operator == (const_ref right) const
{
return (y == right.y) && (x == right.x);
}
bool operator != (const_ref right) const
{
return (y != right.y) || (x != right.x);
}
bool cardinal() const
{
return (x == 0) || (y == 0) || (libmrl::abs(y) == libmrl::abs(x));
}
operator T() const
{
return libmrl::max(libmrl::abs(y), libmrl::abs(x));
}
};
typedef basic_coord<int> Coord;
template <typename T> inline basic_coord<T> operator -(const basic_coord<T>& left, const basic_coord<T>& right)
{
basic_coord<T> result = left;
result -= right;
return result;
}
template <typename T> inline basic_coord<T> operator +(const basic_coord<T>& left, const basic_coord<T>& right)
{
basic_coord<T> result = left;
result += right;
return result;
}
template <> inline Coord abs<Coord> (const Coord& orig)
{
Coord tmp = { abs(orig.y), abs(orig.x) };
return tmp;
}
template <> inline Coord sign<Coord> (const Coord& orig)
{
Coord tmp = { sign(orig.y), sign(orig.x) };
return tmp;
}
extern const Coord NOWHERE;
extern const Coord NORTH;
extern const Coord WEST;
extern const Coord EAST;
extern const Coord SOUTH;
extern const Coord NORTHEAST;
extern const Coord NORTHWEST;
extern const Coord SOUTHEAST;
extern const Coord SOUTHWEST;
extern const Coord NOWHERE;
}
#endif
// coord.hh