public static (int x, int y) Offset(this CardinalDir cardinal)
{
int x = 0;
int y = 0;
if (cardinal.HasFlag(CardinalDir.NORTH))
{
y += 1;
}
if (cardinal.HasFlag(CardinalDir.EAST))
{
x += 1;
}
if (cardinal.HasFlag(CardinalDir.SOUTH))
{
y -= 1;
}
if (cardinal.HasFlag(CardinalDir.WEST))
{
x -= 1;
}
return(x, y);
}
private static CardinalDir Rotate(this CardinalDir cardinal, int diff)
{
CardinalDir rotated = 0;
for (int i = 0; i < cardinalDirs.Length; i++)
{
if (cardinal.HasFlag(cardinalDirs[i]))
{
int newDir = i + diff;
if (newDir >= cardinalDirs.Length)
{
newDir = 0;
}
if (newDir < 0)
{
newDir = cardinalDirs.Length - 1;
}
rotated |= cardinalDirs[newDir];
}
}
return(rotated);
}
