/// <summary>
/// returns all tiles of a cone starting at a point with given direction, length and width
/// </summary>
/// 
public static List <Vector3Int> Cone(Vector3Int origin, Vector3Int targetDirection, float coneWidthHalfAngle, int coneLength)
{
Vector3 originCartesian = HexConverter.TileCoordToCartesianCoord(origin);
IEnumerable <Vector3Int> ring = GetTiles.Ring(origin, coneLength, 1);
HashSet <Vector3Int> cone = new HashSet <Vector3Int>();
foreach (Vector3Int target in ring)
{
Vector3 targetWorldPos = HexConverter.TileCoordToCartesianCoord(target);
Vector3 lookWorldPos = HexConverter.TileCoordToCartesianCoord((origin + targetDirection));
float angle = Vector3.Angle(targetWorldPos - originCartesian, lookWorldPos - originCartesian);
if (Mathf.Abs(angle) > coneWidthHalfAngle + 0.001)
{
continue;
}
List <Vector3Int> linePointsL = GetTiles.Line(origin, target, false, -0.00001f); //for more consistent results we use 2 lines, one slightly left of center
List <Vector3Int> linePointsR = GetTiles.Line(origin, target, false, +0.00001f); //and this her slightly right of center
cone.UnionWith(linePointsL);
cone.UnionWith(linePointsR);
}
return(cone.ToList());
}
/// <summary>
/// returns all tiles of a ring around center in order specified by parameters (startDirection, clockwise)
/// </summary>
public static List <Vector3Int> Ring(Vector3Int center, int radius, TileDirection startDirection = TileDirection.TopRight, bool clockwise = true)
{
if (radius < 1)
{
throw new System.ArgumentException("radius needs to be larger than 0");
}
List <Vector3Int> ringTiles = new List <Vector3Int>();
System.Func <Vector3Int, Vector3Int, Vector3Int> rotationMethod;
if (clockwise == true)
{
rotationMethod = GetTile.FromTileRotated60DegreeClockwise;
}
else
{
rotationMethod = GetTile.FromTileRotated60DegreeCounterClockwise;
}
Vector3Int startOfRing = center + (TileDirectionVectors[(int)startDirection] * radius);
ringTiles.Add(startOfRing);
Vector3Int[] ringCornerTiles = new Vector3Int[6];
ringCornerTiles[0] = startOfRing;
for (int i = 1; i < 6; i++)
{
ringCornerTiles[i] = rotationMethod(center, ringCornerTiles[i - 1]);
}
for (int i = 0; i < 6; i++)
{
List <Vector3Int> tilesOfRingSegment = GetTiles.Line(ringCornerTiles[i], ringCornerTiles[(i + 1) % 6], false);
ringTiles.AddRange(tilesOfRingSegment);
}
ringTiles.RemoveAt(ringTiles.Count - 1);
return(ringTiles);
}
