/// <summary>
/// Returns an array of CubicHexCoords that appear at the given range around the given
/// center hex. The ring begins from the CubicHexCoord range grid steps away from the
/// center, heading in the given direction, and encircling the center in clockwise order.
/// </summary>
/// <param name="center">The CubicHexCoord around which the ring is formed.</param>
/// <param name="range">The number of grid steps distance away from the center that the
/// ring will be.</param>
/// <param name="startDirection">The direction in which the first CubicHexCoord of the
/// ring will appear in.</param>
/// <returns>An array of CubicHexCoords ordered as a ring.</returns>
public static CubicHexCoord[] 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);
}
/// <summary>
/// Returns an array of CubicHexCoords of a area centering around the given center hex and
/// extending in every direction up to the given range. The hexes are ordered starting from
/// the maximum range, in the given direction, spiraling inward in a clockwise direction
/// until the center is reached (and is the last element in the array).
/// </summary>
/// <param name="center">The CubicHexCoord around which the spiral is formed.</param>
/// <param name="range">The number of grid steps distance away from the center that the
/// edge of the spiral will be.</param>
/// <param name="startDirection">The direction in which the first CubicHexCoord of the
/// spiral will appear in.</param>
/// <returns>An array of CubicHexCoords ordered as a spiral, beginning from the outside
/// and proceeding clockwise until it reaches the center of the spiral.</returns>
public static CubicHexCoord[] SpiralOutward(CubicHexCoord center, int range, DirectionEnum startDirection = DirectionEnum.E)
{
if (range <= 0)
{
throw new ArgumentOutOfRangeException("range must be a positive integer value.");
}
else if (range == 0)
{
return(new CubicHexCoord[1] {
center
});
}
int arraySize = 1;
for (int i = range; i > 0; i--)
{
arraySize += 6 * i;
}
CubicHexCoord[] result = new CubicHexCoord[arraySize];
result[0] = center;
int arrayIndex = 1;
for (int i = 1; i <= range; i++)
{
CubicHexCoord[] ring = CubicHexCoord.Ring(center, i, startDirection);
ring.CopyTo(result, arrayIndex);
arrayIndex += ring.Length;
}
return(result);
}
public static CubicHexCoord RotateOnceRight(CubicHexCoord center, CubicHexCoord toRotate)
{
var local = toRotate - center;
var localRotated = new CubicHexCoord(-local.y, -local.z, -local.x);
var rotated = localRotated + center;
return(rotated);
}
/// <summary>
/// Returns the minimum number of grid steps to get from a to b.
/// </summary>
/// <param name="a">Any CubicHexCoord.</param>
/// <param name="b">Any CubicHexCoord.</param>
/// <returns>An integer number of grid steps from a to b.</returns>
public static int Distance(CubicHexCoord a, CubicHexCoord b)
{
int dx = Math.Abs(a.x - b.x);
int dy = Math.Abs(a.y - b.y);
int dz = Math.Abs(a.z - b.z);
return(Math.Max(Math.Max(dx, dy), dz));
}
/// <summary>
/// Check if this CubicHexCoord is equal to an arbitrary object.
/// </summary>
/// <returns>Whether or not this CubicHexCoord and the given object are equal.</returns>
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
if (GetType() != obj.GetType())
{
return(false);
}
CubicHexCoord other = (CubicHexCoord)obj;
return((this.x == other.x) && (this.y == other.y) && (this.z == other.z));
}
/// <summary>
/// Returns an array of CubicHexCoords that form the straightest path from the given start
/// to the given end. The hexes in the line are determined by forming a straight line from
/// start to end and linearly interpolating and rounding each of the interpolated points to
/// the nearest hex position.
/// </summary>
/// <param name="start">The CubicHexCoord representing the first hex in the line.</param>
/// <param name="end">The CubicHexCoord representing the last hex in the line.</param>
/// <returns>An array of CubicHexCoords ordered as a line from start to end.</returns>
public static CubicHexCoord[] Line(CubicHexCoord start, CubicHexCoord end)
{
int distance = CubicHexCoord.Distance(start, end);
CubicHexCoord[] result = new CubicHexCoord[distance + 1];
for (int i = 0; i <= distance; i++)
{
float xLerp = start.x + (end.x - start.x) * 1f / distance * i;
float yLerp = start.y + (end.y - start.y) * 1f / distance * i;
float zLerp = start.z + (end.z - start.z) * 1f / distance * i;
result[i] = new FloatCubic(xLerp, yLerp, zLerp).Round();
}
return(result);
}
/// <summary>
/// Returns an array of CubicHexCoords within the given range from the given center
/// (including the center itself) in no particular order.
/// </summary>
/// <param name="center">The CubicHexCoord around which the area is formed.</param>
/// <param name="range">The maximum number of grid steps away from the center that
/// CubicHexCoords will be returned for.</param>
/// <returns>An array of CubicHexCoords within the given range from the given center
/// (including the center itself) in no particular order.</returns>
public static CubicHexCoord[] Area(CubicHexCoord center, int range)
{
if (range < 0)
{
throw new ArgumentOutOfRangeException("range must be a non-negative integer value.");
}
else if (range == 0)
{
return(new CubicHexCoord[1] {
center
});
}
int arraySize = 1;
for (int i = range; i > 0; i--)
{
arraySize += 6 * i;
}
CubicHexCoord[] result = new CubicHexCoord[arraySize];
for (int i = 0, dx = -range; dx <= range; dx++)
{
int dyMinBound = Math.Max(-range, -dx - range);
int dyMaxBound = Math.Min(range, -dx + range);
for (int dy = dyMinBound; dy <= dyMaxBound; dy++)
{
int dz = -dx - dy;
result[i++] = center + new CubicHexCoord(dx, dy, dz);
}
}
return(result);
}
FloatCubic(CubicHexCoord cubic)
{
this.x = (float)cubic.x;
this.y = (float)cubic.y;
this.z = (float)cubic.z;
}
/// <remarks>THIS IS NOT YET IMPLEMENTED!</remarks>
/// <see cref="http://www.redblobgames.com/grids/hexagons/"/>
/// <summary>
/// Rotate a CubicHexCoord around the given center by the given rotation (constrained to
/// exact 60 degree rotation steps) and return the CubicHexCoord that represents the
/// rotated position in the grid.
/// </summary>
/// <param name="center">The CubicHexCoord representing the rotation's pivot.</param>
/// <param name="toRotate">The CubicHexCoord to be rotated around the pivot.</param>
/// <param name="rotation">The direction and magnitude of rotation to be applied (in exact
/// 60 degree rotation steps.</param>
/// <returns>A CubicHexCoord representing the position of the rotated hex on the grid.
/// </returns>
public static CubicHexCoord Rotate(CubicHexCoord center, CubicHexCoord toRotate, RotationEnum rotation)
{
throw new NotImplementedException("Feature not suppored yet!");
}
/// <summary>
/// Returns an array of CubicHexCoords of a area centering around this hex and extending in
/// every direction up to the given range. The hexes are ordered starting from the maximum
/// range, in the given direction, spiraling inward in a clockwise direction until the
/// center is reached (and is the last element in the array).
/// </summary>
/// <param name="range">The number of grid steps distance away from the center that the
/// edge of the spiral will be.</param>
/// <param name="startDirection">The direction in which the first CubicHexCoord of the
/// spiral will appear in.</param>
/// <returns>An array of CubicHexCoords ordered as a spiral, beginning from the outside
/// and proceeding clockwise until it reaches the center of the spiral.</returns>
/// <returns></returns>
public CubicHexCoord[] SpiralAroundOutward(int range, DirectionEnum startDirection = DirectionEnum.E)
{
return(CubicHexCoord.SpiralOutward(this, range, startDirection));
}
/// <remarks>THIS IS NOT YET IMPLEMENTED!</remarks>
/// <summary>
/// Rotate a CubicHexCoord around this CubicHexCoord by the given rotation (constrained to
/// exact 60 degree rotation steps) and return the CubicHexCoord that represents the
/// rotated position in the grid.
/// </summary>
/// <param name="toRotate">The CubicHexCoord to be rotated around this CubicHexCoord.</param>
/// <param name="rotation">The direction and magnitude of rotation to be applied (in exact
/// 60 degree rotation steps.</param>
/// <returns>A CubicHexCoord representing the position of the rotated hex on the grid.
/// </returns>
public CubicHexCoord RotateOtherAround(CubicHexCoord toRotate, RotationEnum rotation)
{
return(CubicHexCoord.Rotate(this, toRotate, rotation));
}
/// <remarks>THIS IS NOT YET IMPLEMENTED!</remarks>
/// <summary>
/// Rotate this CubicHexCoord around the given center by the given rotation (constrained to
/// exact 60 degree rotation steps) and return the CubicHexCoord that represents the
/// rotated position in the grid.
/// </summary>
/// <param name="center">The CubicHexCoord to be rotated around this CubicHexCoord.</param>
/// <param name="rotation">The direction and magnitude of rotation to be applied (in exact
/// 60 degree rotation steps.</param>
/// <returns>A CubicHexCoord representing the position of the rotated hex on the grid.
/// </returns>
public CubicHexCoord RotateAroundOther(CubicHexCoord center, RotationEnum rotation)
{
return(CubicHexCoord.Rotate(center, this, rotation));
}
/// <summary>
/// Returns an array of CubicHexCoords that appear at the given range around this hex.
/// The ring begins from the CubicHexCoord range grid steps away from the center, heading
/// in the given direction, and encircling the center in clockwise order.
/// </summary>
/// <param name="range">The number of grid steps distance away from the center that the
/// ring will be.</param>
/// <param name="startDirection">The direction in which the first CubicHexCoord of the
/// ring will appear in.</param>
/// <returns>An array of CubicHexCoords ordered as a ring.</returns>
public CubicHexCoord[] RingAround(int range, DirectionEnum startDirection = DirectionEnum.E)
{
return(CubicHexCoord.Ring(this, range, startDirection));
}
/// <summary>
/// Returns an array of CubicHexCoords that form the straightest path from this hex to the
/// given end. The hexes in the line are determined by forming a straight line from start
/// to end and linearly interpolating and rounding each of the interpolated points to
/// the nearest hex position.
/// </summary>
/// <param name="other">The CubicHexCoord representing the last hex in the line.</param>
/// <returns>An array of CubicHexCoords ordered as a line from start to end.</returns>
public CubicHexCoord[] LineTo(CubicHexCoord other)
{
return(CubicHexCoord.Line(this, other));
}
/// <summary>
/// Returns the minimum number of grid steps to get from this hex to the given hex.
/// </summary>
/// <param name="other">Any CubicHexCoord.</param>
/// <returns>An integer number of grid steps from this hex to the given hex.</returns>
public int DistanceTo(CubicHexCoord other)
{
return(CubicHexCoord.Distance(this, other));
}
/// <summary>
/// Returns an array of CubicHexCoords within the given range from this hex (including
/// this hex) in no particular order.
/// </summary>
/// <param name="range">The maximum number of grid steps away from this hex that
/// CubicHexCoords will be returned for.</param>
/// <returns>An array of CubicHexCoords within the given range from this hex (including
/// this hex) in no particular order.</returns>
public CubicHexCoord[] AreaAround(int range)
{
return(CubicHexCoord.Area(this, range));
}
