private void GenerateMeshes()
{
byte chunkSize = (byte)tileMap.ChunkSize;
//Offsets For Positioning the Grid
float vertexOffset = 0.5f;
Vector3 tileOffset = new Vector3();
Vector3 chunkOffset = new Vector3();
//Row and Column Count of the Chunks
int chunkRows = tileMap.Rows / chunkSize;
int chunkColumns = tileMap.Columns / chunkSize;
float chunkOffsetX = -(chunkColumns * chunkSize * 0.5f) + (chunkSize * 0.5f);
float chunkOffsetY = -(chunkRows * chunkSize * 0.5f) + (chunkSize * 0.5f);
//TODO: Load Materials from a Different Place and maybe assign it to Tilemap Data
Material mat_Tilemap = this.CreateMaterial();
int x, y, meshID = 0;
tileMap.Chunks = new TilemapChunk[chunkColumns, chunkRows];
tileMap.FlattenedChunks = new TilemapChunk[chunkColumns * chunkRows];
for (int j = 0; j < chunkRows; j++)
{
for (int i = 0; i < chunkColumns; i++)
{
//Arrays for Filling the Chunk Data
Vector3[] vertices = new Vector3[chunkSize * chunkSize * 4];
int[] triangles = new int[chunkSize * chunkSize * 6];
Vector2[] texCoords = new Vector2[vertices.Length];
Color[] colors = new Color[vertices.Length];
//Tracker Variables
int v = 0;
int t = 0;
//Create a New Tilemap Chunk and a corresponding Mesh
TilemapChunk tileMapChunk = new TilemapChunk();
Mesh chunkMesh = new Mesh();
Tile[] chunkTiles = new Tile[chunkSize * chunkSize];
chunkOffset.Set(chunkOffsetX + (i * chunkSize), chunkOffsetY + (j * chunkSize), 0);
for (int cY = 0; cY < chunkSize; cY++)
{
for (int cX = 0; cX < chunkSize; cX++)
{
tileOffset.Set(cX - chunkSize * 0.5f + 0.5f, cY - chunkSize * 0.5f + 0.5f, 0);
vertices[v + 0] = new Vector3(-vertexOffset, -vertexOffset, 0) + tileOffset + chunkOffset;
vertices[v + 1] = new Vector3(-vertexOffset, vertexOffset, 0) + tileOffset + chunkOffset;
vertices[v + 2] = new Vector3(vertexOffset, -vertexOffset, 0) + tileOffset + chunkOffset;
vertices[v + 3] = new Vector3(vertexOffset, vertexOffset, 0) + tileOffset + chunkOffset;
texCoords[v + 0] = new Vector2(0, 0);
texCoords[v + 1] = new Vector2(0, 1);
texCoords[v + 2] = new Vector2(1, 0);
texCoords[v + 3] = new Vector2(1, 1);
colors[v + 0] = Color.white;
colors[v + 1] = Color.white;
colors[v + 2] = Color.white;
colors[v + 3] = Color.white;
triangles[t + 0] = v + 0;
triangles[t + 1] = triangles[t + 4] = v + 1;
triangles[t + 2] = triangles[t + 3] = v + 2;
triangles[t + 5] = v + 3;
x = cX + (i * chunkSize);
y = cY + (j * chunkSize);
tileMap.Tiles[x, y].indices = new int[] { (v + 0), (v + 1), (v + 2), (v + 3) };
tileMap.Tiles[x, y].ParentChunk = tileMapChunk;
tileMap.Tiles[x, y].vertices = new Vector3[] { vertices[v + 0], vertices[v + 1], vertices[v + 2], vertices[v + 3] };
//TODO:! Fill Tiles of Chunk
//Debug.Log($"{i},{j} {(chunkSize * i) + cX + (j * chunkSize) + cY}");
//chunkTiles[((chunkSize * i) + cX) + ((j * chunkRows) + cY)] = tileMap.Tiles[x, y];
//Calulate the Intersection Points of The Grid Tiles
tileMap.Intersections[x, y].position = vertices[v + 0];
if (x == tileMap.Columns - 1)
{
tileMap.Intersections[x + 1, y].position = vertices[v + 2];
}
if (y == tileMap.Rows - 1)
{
tileMap.Intersections[x, y + 1].position = vertices[v + 1];
}
if (x == tileMap.Columns - 1 && y == tileMap.Rows - 1)
{
tileMap.Intersections[x + 1, y + 1].position = vertices[v + 3];
}
v += 4;
t += 6;
}
}
//Generate the Mesh from the Calculated vertices, indices, UVs and colors
chunkMesh.Clear();
chunkMesh.vertices = vertices;
chunkMesh.triangles = triangles;
chunkMesh.uv = texCoords;
chunkMesh.colors = colors;
chunkMesh.RecalculateNormals();
//Apply the Chunk data
tileMapChunk.id = meshID;
tileMapChunk.Mesh = chunkMesh;
tileMapChunk.TexCoords = texCoords;
tileMapChunk.Material = mat_Tilemap;
tileMapChunk.Colors = colors;
tileMapChunk.TRS = Matrix4x4.TRS(chunkOffset, Quaternion.identity, Vector3.one);
tileMapChunk.Visible = false;
//tileMapChunk.Tiles = chunkTiles;
//One can always use a 1-D array with "meshID" as index
tileMap.Chunks[i, j] = tileMapChunk;
tileMap.FlattenedChunks[meshID] = tileMapChunk;
meshID += 1;
}
}
}
