void DebugHexMath()
{
Vector3Int origin = new Vector3Int(0, 0, 0);
Vector3Int target = new Vector3Int(2, 2, 0);
Vector3Int targetCube = new Vector3Int(1, -3, 2);
// Distance testing: Oddr then Cube
Assert.AreEqual(HexMath.OddrDistance(origin, origin), 0);
Assert.AreEqual(HexMath.OddrDistance(origin, origin + HexMath.CubeDirection(0)), 1);
Assert.AreEqual(HexMath.OddrDistance(origin, origin + HexMath.CubeDirection(0) * 2), 2);
Assert.AreEqual(HexMath.OddrDistance(origin, target), 3);
Assert.AreEqual(HexMath.OddrDistance(origin, target + HexMath.CubeDirection(0)), 2);
Assert.AreEqual(HexMath.OddrDistance(origin, new Vector3Int(-6, -6, 0)), 9);
Assert.AreEqual(HexMath.CubeDistance(origin, origin), 0);
Assert.AreEqual(HexMath.CubeDistance(origin, origin + HexMath.CubeDirection(0) * 2), 2);
Assert.AreEqual(HexMath.CubeDistance(origin, new Vector3Int(0, 0, 0)), 0);
Assert.AreEqual(HexMath.CubeDistance(origin, targetCube), 3);
Assert.AreEqual(HexMath.CubeDistance(origin, target + HexMath.CubeDirection(0)), 2);
Assert.AreEqual(HexMath.CubeDistance(origin, new Vector3Int(-1, 4, -3)), 4);
// Cube - Hex conversion testing.
Vector3Int Hex = new Vector3Int(1, 1, 0);
Vector3Int Cube = new Vector3Int(1, -2, 1);
Assert.AreEqual(Hex, HexMath.CubeToOddr(Cube));
Assert.AreEqual(Cube, HexMath.OddrToCube(Hex));
Hex = new Vector3Int(-2, -2, 0);
Cube = new Vector3Int(-1, 3, -2);
Assert.AreEqual(Hex, HexMath.CubeToOddr(Cube));
Assert.AreEqual(Cube, HexMath.OddrToCube(Hex));
Hex = new Vector3Int(1, -2, 0);
Cube = new Vector3Int(2, 0, -2);
Assert.AreEqual(Hex, HexMath.CubeToOddr(Cube));
Assert.AreEqual(Cube, HexMath.OddrToCube(Hex));
Hex = new Vector3Int(-2, 2, 0);
Cube = new Vector3Int(-3, 1, 2);
Assert.AreEqual(Hex, HexMath.CubeToOddr(Cube));
Assert.AreEqual(Cube, HexMath.OddrToCube(Hex));
/* Neighbor Testing: Testing around Origin: (0, 0, 0).
* - Radius 0. It's a marsh, so a neighbor test of radius 0 should simply return one marsh.
* - Radius 1. Should add 6 soil tiles and count equal 7
* - Radius 2. Should add 12 barren tiles and count equal 19.
* No tiles should be water for this setup.
*/
NeighborTestHelper(0);
NeighborTestHelper(1);
NeighborTestHelper(2);
NeighborTestHelper(3);
}
// Get Tendrils: There are 18 unique tendrils that form using a given tile as a base, not including the
// tendrils that are also considered clusters.
private static List <List <Vector3Int> > GetTendrils(Vector3Int baseTilePosition)
{
List <List <Vector3Int> > tileTendrils = new List <List <Vector3Int> >();
// The for loop represents the 6 possible tiles that surround the base tile.
for (int i = 0; i < 6; i++)
{
// Add the center tile since it will be part of every tendril.
List <Vector3Int> tendril = new List <Vector3Int>();
tendril.Add(baseTilePosition);
// Add this loop's tile to this tednril, based on its position relative to the base.
// That is, baseTilePosition + cubeDirections. Of course we have to convert to and from cube coords.
Vector3Int targetCubePosition = HexMath.cubeDirections[i] + HexMath.OddrToCube(baseTilePosition);
Vector3Int targetOddrPosition = HexMath.CubeToOddr(targetCubePosition);
tendril.Add(targetOddrPosition);
// The third tile slightly is more complicated. It can be in any three directions based on the initial
// direction, deviating by -1, 0, and +1, and making sure to wrap from -1 to 5.
for (int d = -1; d <= 1; d++)
{
List <Vector3Int> triple = new List <Vector3Int>();
int newDirection = ((i + d) % 6 + 6) % 6;
targetCubePosition = HexMath.cubeDirections[newDirection] + HexMath.OddrToCube(baseTilePosition);
targetOddrPosition = HexMath.CubeToOddr(targetCubePosition);
triple.Add(targetOddrPosition);
triple.AddRange(tendril);
// Now add this tendril of three tiles to the tileTendrils list.
tileTendrils.Add(triple);
}
}
return(tileTendrils);
}
// Get Clusters: There are 15 unique clusters that form around a central tile.
// This method makes a list of them and returns them.
private static List <List <Vector3Int> > GetClusters(Vector3Int centerTilePosition)
{
List <List <Vector3Int> > tileClusters = new List <List <Vector3Int> >();
// The outer loop represents the 6 possible tiles that surround the central tile.
for (int i = 0; i < 6; i++)
{
// Add the center tile since it will be part of every cluster.
List <Vector3Int> cluster = new List <Vector3Int>();
cluster.Add(centerTilePosition);
// Add the first outer loop tile of this cluster, based on its position relative to center.
// That is, centerTilePosition + cubeDirections. Of course we have to convert to and from cube coords.
Vector3Int targetCubePosition = HexMath.cubeDirections[i] + HexMath.OddrToCube(centerTilePosition);
Vector3Int targetOddrPosition = HexMath.CubeToOddr(targetCubePosition);
cluster.Add(targetOddrPosition);
// The inner loop goes through each unique third tile addition to the group.
for (int j = i + 1; j < 6; j++)
{
List <Vector3Int> triple = new List <Vector3Int>();
// Add the inner loop tile of this cluster, based on its position relative to center.
// That is, centerTilePosition + cubeDirections. Of course we have to convert to and from cube coords.
targetCubePosition = HexMath.cubeDirections[j] + HexMath.OddrToCube(centerTilePosition);
targetOddrPosition = HexMath.CubeToOddr(targetCubePosition);
triple.Add(targetOddrPosition);
triple.AddRange(cluster);
// Now add this cluster of three tiles to the tileClusters list.
tileClusters.Add(triple);
}
}
return(tileClusters);
}