private void MeshIt(Vector3Int[] tiles, float[,] noiseMap)
{
Vector3 toTopLeft = -Vector3.right * .25f * hexWidth + Vector3.forward * .5f * hexHeight;
Vector3 toTopRight = Vector3.right * .25f * hexWidth + Vector3.forward * .5f * hexHeight;
Vector3 toRight = Vector3.right * .5f * hexWidth;
Dictionary <Vector3Int, TileMeshData> tileVertexCodex = new Dictionary <Vector3Int, TileMeshData>();
int[] triangleIndices = new int[tiles.Length * 12];
int vertexIndex = 0;
int triangleIndex = 0;
float minX = float.MaxValue;
float maxX = float.MinValue;
float minY = float.MaxValue;
float maxY = float.MinValue;
foreach (Vector3Int tile in tiles)
{
Vector3 tileCenter = tilemap.GetCellCenterWorld(tile);
Vector3 topLeftCorner = tileCenter + toTopLeft;
Vector3 topRightCorner = tileCenter + toTopRight;
Vector3 rightCorner = tileCenter + toRight;
Vector3 bottomRightCorner = tileCenter - toTopLeft;
Vector3 bottomLeftCorner = tileCenter - toTopRight;
Vector3 leftCorner = tileCenter - toRight;
minX = Mathf.Min(minX, leftCorner.x);
maxX = Mathf.Max(maxX, rightCorner.x);
minY = Mathf.Min(minY, bottomRightCorner.z);
maxY = Mathf.Max(maxY, topRightCorner.z);
TileMeshData tmd = new TileMeshData();
tmd.verticeIndices = new Tuple <Vector3, int> [6];
// look for shared vertices
Vector3Int[] surroundingTiles = HexTools.GetSurroundingTilesOffset(tile);
if (tileVertexCodex.TryGetValue(surroundingTiles[(int)Cardinality.N], out TileMeshData sharedData))
{
tmd.verticeIndices[(int)IndexOrder.TopLeft] = new Tuple <Vector3, int>(topLeftCorner, sharedData.verticeIndices[(int)IndexOrder.BottomLeft].Item2);
tmd.verticeIndices[(int)IndexOrder.TopRight] = new Tuple <Vector3, int>(topRightCorner, sharedData.verticeIndices[(int)IndexOrder.BottomRight].Item2);
}
if (tileVertexCodex.TryGetValue(surroundingTiles[(int)Cardinality.NE], out sharedData))
{
tmd.verticeIndices[(int)IndexOrder.TopRight] = new Tuple <Vector3, int>(topRightCorner, sharedData.verticeIndices[(int)IndexOrder.Left].Item2);
tmd.verticeIndices[(int)IndexOrder.Right] = new Tuple <Vector3, int>(rightCorner, sharedData.verticeIndices[(int)IndexOrder.BottomLeft].Item2);
}
if (tileVertexCodex.TryGetValue(surroundingTiles[(int)Cardinality.SE], out sharedData))
{
tmd.verticeIndices[(int)IndexOrder.Right] = new Tuple <Vector3, int>(rightCorner, sharedData.verticeIndices[(int)IndexOrder.TopLeft].Item2);
tmd.verticeIndices[(int)IndexOrder.BottomRight] = new Tuple <Vector3, int>(bottomRightCorner, sharedData.verticeIndices[(int)IndexOrder.Left].Item2);
}
if (tileVertexCodex.TryGetValue(surroundingTiles[(int)Cardinality.S], out sharedData))
{
tmd.verticeIndices[(int)IndexOrder.BottomRight] = new Tuple <Vector3, int>(bottomRightCorner, sharedData.verticeIndices[(int)IndexOrder.TopRight].Item2);
tmd.verticeIndices[(int)IndexOrder.BottomLeft] = new Tuple <Vector3, int>(bottomLeftCorner, sharedData.verticeIndices[(int)IndexOrder.TopLeft].Item2);
}
if (tileVertexCodex.TryGetValue(surroundingTiles[(int)Cardinality.SW], out sharedData))
{
tmd.verticeIndices[(int)IndexOrder.BottomLeft] = new Tuple <Vector3, int>(bottomLeftCorner, sharedData.verticeIndices[(int)IndexOrder.Right].Item2);
tmd.verticeIndices[(int)IndexOrder.Left] = new Tuple <Vector3, int>(leftCorner, sharedData.verticeIndices[(int)IndexOrder.TopRight].Item2);
}
if (tileVertexCodex.TryGetValue(surroundingTiles[(int)Cardinality.NW], out sharedData))
{
tmd.verticeIndices[(int)IndexOrder.Left] = new Tuple <Vector3, int>(leftCorner, sharedData.verticeIndices[(int)IndexOrder.BottomRight].Item2);
tmd.verticeIndices[(int)IndexOrder.TopLeft] = new Tuple <Vector3, int>(topLeftCorner, sharedData.verticeIndices[(int)IndexOrder.Right].Item2);
}
if (tmd.verticeIndices[(int)IndexOrder.TopLeft] == null)
{
tmd.verticeIndices[(int)IndexOrder.TopLeft] = new Tuple <Vector3, int>(topLeftCorner, vertexIndex++);
}
if (tmd.verticeIndices[(int)IndexOrder.TopRight] == null)
{
tmd.verticeIndices[(int)IndexOrder.TopRight] = new Tuple <Vector3, int>(topRightCorner, vertexIndex++);
}
if (tmd.verticeIndices[(int)IndexOrder.Right] == null)
{
tmd.verticeIndices[(int)IndexOrder.Right] = new Tuple <Vector3, int>(rightCorner, vertexIndex++);
}
if (tmd.verticeIndices[(int)IndexOrder.BottomRight] == null)
{
tmd.verticeIndices[(int)IndexOrder.BottomRight] = new Tuple <Vector3, int>(bottomRightCorner, vertexIndex++);
}
if (tmd.verticeIndices[(int)IndexOrder.BottomLeft] == null)
{
tmd.verticeIndices[(int)IndexOrder.BottomLeft] = new Tuple <Vector3, int>(bottomLeftCorner, vertexIndex++);
}
if (tmd.verticeIndices[(int)IndexOrder.Left] == null)
{
tmd.verticeIndices[(int)IndexOrder.Left] = new Tuple <Vector3, int>(leftCorner, vertexIndex++);
}
tileVertexCodex[tile] = tmd;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.TopLeft].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.TopRight].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.BottomRight].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.TopRight].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.Right].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.BottomRight].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.BottomRight].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.BottomLeft].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.TopLeft].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.BottomLeft].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.Left].Item2;
triangleIndices[triangleIndex++] = tmd.verticeIndices[(int)IndexOrder.TopLeft].Item2;
}
Vector3[] vertices = new Vector3[vertexIndex];
int mapX = noiseMap.GetLength(0);
int mapY = noiseMap.GetLength(1);
int i = 0;
foreach (var kvp in tileVertexCodex)
{
TileMeshData tmd = kvp.Value;
foreach (Tuple <Vector3, int> verts in tmd.verticeIndices)
{
if (vertices[verts.Item2] != Vector3.zero)
{
continue; // If the tilemap is positioned at 0,0 there should never be a vertex there
}
Vector3 pos = verts.Item1;
float percentX = Mathf.InverseLerp(minX, maxX, pos.x);
float percentY = Mathf.InverseLerp(minY, maxY, pos.z);
int x = Mathf.RoundToInt(percentX * (mapX - 1));
int y = Mathf.RoundToInt(percentY * (mapY - 1));
vertices[verts.Item2] = pos + new Vector3(0, noiseMap[x, y] * 5, 0);
++i;
}
}
Mesh mesh = new Mesh();
mesh.vertices = vertices;
mesh.triangles = triangleIndices;
mesh.RecalculateBounds();
GetComponent <MeshFilter>().sharedMesh = mesh;
Debug.Log("i: " + i + " vertices: " + vertices.Length + " triangles: " + (triangleIndices.Length / 3));
}