00001 #include "Direction.h"
00002
00003 Direction Direction::N(-1, -1, Direction::S, true);
00004 Direction Direction::NE(-1, 0, Direction::SW, false);
00005 Direction Direction::E(-1, 1, Direction::W, true);
00006 Direction Direction::SE(0, 1, Direction::NW, false);
00007 Direction Direction::S(1, 1, Direction::N, true);
00008 Direction Direction::SW(1, 0, Direction::NE, false);
00009 Direction Direction::W(1, -1, Direction::E, true);
00010 Direction Direction::NW(0, -1, Direction::SE, false);
00011
00012 Direction::Direction(int x, int y, Direction& opposite, bool cardinal) :
00013 _offset(x, y),
00014 _opposite(&opposite),
00015 _cardinal(cardinal)
00016 {
00017
00018 }
00019
00020
00021 Direction::~Direction()
00022 {
00023 }
00024
00025 vector<const Direction*> Direction::getAllDirections()
00026 {
00027 static vector<const Direction*> directions;
00028 if (directions.empty())
00029 {
00030 directions.push_back(&N);
00031 directions.push_back(&NE);
00032 directions.push_back(&E);
00033 directions.push_back(&SE);
00034 directions.push_back(&S);
00035 directions.push_back(&SW);
00036 directions.push_back(&W);
00037 directions.push_back(&NW);
00038 }
00039
00040 return directions;
00041 }
00042
00043 const Point& Direction::offset() const
00044 {
00045 return _offset;
00046 }
00047
00048 const Direction& Direction::opposite() const
00049 {
00050 return *_opposite;
00051 }
00052
00053 bool Direction::isCardinal() const
00054 {
00055 return _cardinal;
00056 }
00057
00058 bool Direction::operator < (const Direction& dir) const
00059 {
00060 if (offset().x < dir.offset().x)
00061 {
00062 return true;
00063 }
00064 else if (offset().x > dir.offset().x)
00065 {
00066 return false;
00067 }
00068 else
00069 {
00070 return (offset().y < dir.offset().y);
00071 }
00072 }
00073
00074 bool Direction::operator == (const Direction& dir) const
00075 {
00076 return (_offset == dir._offset);
00077 }
