void Map::toMapCoordinates( int* mx, int* my )
{
 signed int x, y;
 x = ( 2 * (*my) + (*mx) ) / 2;
    y = ( 2 * (*my) - (*mx) ) / 2;
    *mx = x >> Defines.lTileSize;
    *my = y >> Defines.lTileSize;
}

void Map::fromMapCoordinates( int* x, int* y )
{
 signed int mx, my;
 *x <<= Defines.lTileSize;
 *y <<= Defines.lTileSize;
 mx = (*x) - (*y);
 my = (*x) / 2 - (*y) / 2;
 *x = mx;
 *y = my;
}