Ring(CubicHexCoord center, int range, DirectionEnum startDirection = DirectionEnum.E)
{
if (range <= 0)
{
throw new ArgumentOutOfRangeException("range must be a positive integer value.");
}
CubicHexCoord[] result = new CubicHexCoord[6 * range];
CubicHexCoord cube = center + DIRECTIONS[(int)startDirection].Scale(range);
int[] directions = new int[6];
for (int i = 0; i < 6; i++)
{
directions[i] = ((int)startDirection + i) % 6;
}
int index = 0;
for (int i = 0; i < 6; i++)
{
int neighborDirection = (directions[i] + 2) % 6;
for (int j = 0; j < range; j++)
{
result[index++] = cube;
cube = cube.Neighbor((DirectionEnum)neighborDirection);
}
}
return(result);
}
public void DistanceTo()
{
CubicHexCoord cubic1 = new CubicHexCoord( 0, 0, 0 );
CubicHexCoord cubic2 = cubic1.Neighbor( DirectionEnum.E ).Neighbor( DirectionEnum.SE );
int distance = cubic1.DistanceTo( cubic2 );
Assert.That( distance, Is.EqualTo( 2 ) );
}
public void Neighbors()
{
CubicHexCoord cubic = new CubicHexCoord( 1, 2, 3 );
CubicHexCoord[] neighbors = cubic.Neighbors();
Assert.That( neighbors, Is.EquivalentTo( new CubicHexCoord[ 6 ] {
cubic.Neighbor( DirectionEnum.E ),
cubic.Neighbor( DirectionEnum.SE ),
cubic.Neighbor( DirectionEnum.SW ),
cubic.Neighbor( DirectionEnum.W ),
cubic.Neighbor( DirectionEnum.NW ),
cubic.Neighbor( DirectionEnum.NE )
} ) );
}
