void Start()
{
TerrainManager manager = FindObjectOfType <TerrainManager>();
if (manager == null || !manager.enabled)
{
Debug.LogError("Not found TerrainManager or is enabled on scene!");
enabled = false;
return;
}
Vector3 chunkSize = manager.chunkSize;
Chunk.Coords startCoords = manager.ToChunkCoords(transform.position);
Vector3 newPos = transform.position;
if (startOnCenter)
{
newPos.x = startCoords.x * chunkSize.x + chunkSize.x / 2.0f;
newPos.z = startCoords.y * chunkSize.z + chunkSize.z / 2.0f;
}
if (startOnSurface)
{
Chunk chunk = manager.GetChunk(startCoords);
newPos.y = chunk.terrain.SampleHeight(newPos);
}
transform.position = newPos;
}
private bool IsOutOfRange(Chunk.Coords currentCoords, Chunk.Coords otherCoords)
{
float distanceX = Mathf.Abs(currentCoords.x - otherCoords.x);
float distanceY = Mathf.Abs(currentCoords.y - otherCoords.y);
return(distanceX > destoryRange || distanceY > destoryRange);
}
public bool ShowChunk(Chunk.Coords coords)
{
if (!chunkMap.ContainsKey(coords))
{
CreateChunk(coords);
return(true);
}
return(false);
}
void Update()
{
if (ShouldCreateChunks())
{
Chunk.Coords coords = GetCurrentCoords();
OnChangeChunk(coords);
lastCreatedPosition = focus.position;
}
}
public Chunk?TryGetChunk(Chunk.Coords coords)
{
Chunk chunk;
if (chunkMap.TryGetValue(coords, out chunk))
{
return(chunk);
}
return(null);
}
private void OnChangeChunk(Chunk.Coords coords)
{
if (showChunksCoroutine != null)
{
StopCoroutine(showChunksCoroutine);
}
showChunksCoroutine = StartCoroutine(StartShowChunks(coords));
RemoveChunksIfOutOfRange(coords);
}
private Terrain CreateTerrainForChunk(Chunk.Coords coords)
{
TerrainData terrainData = CreateAndSetupTerrainData();
GameObject terrainObject = Terrain.CreateTerrainGameObject(terrainData);
terrainObject.transform.position = new Vector3(chunkSize.x * coords.x, 0.0f, chunkSize.z * coords.y);
terrainObject.transform.parent = gameObject.transform;
terrainObject.transform.name = string.Format("Chunk ({0}, {1})", coords.x, coords.y);
return(GetAndSetupTerrain(terrainObject));
}
private void RemoveChunksIfOutOfRange(Chunk.Coords currentCoords)
{
var chunkCoords = manager.LoadedChunksCoords;
foreach (var coords in chunkCoords)
{
if (IsOutOfRange(currentCoords, coords))
{
manager.RemoveChunk(coords);
}
}
}
public Chunk GetChunk(Chunk.Coords coords)
{
Chunk?chunkOrNull = TryGetChunk(coords);
if (chunkOrNull != null)
{
return((Chunk)chunkOrNull);
}
ShowChunk(coords);
return((Chunk)TryGetChunk(coords));
}
public void RemoveChunk(Chunk.Coords coords)
{
Chunk?chunkOrNull = TryGetChunk(coords);
if (chunkOrNull != null)
{
Chunk chunk = (Chunk)chunkOrNull;
Destroy(chunk.terrain.gameObject);
Destroy(chunk.terrain.terrainData);
Destroy(chunk.terrain);
chunkMap.Remove(coords);
}
}
private IEnumerator StartShowChunks(Chunk.Coords cuurentCoords)
{
chunksToLoad = GetChunkCoordsToLoad(cuurentCoords);
chunksLoadedCount = 0;
foreach (var coords in chunksToLoad)
{
manager.ShowChunk(coords);
chunksLoadedCount++;
yield return(null);
}
chunksToLoad = null;
chunksLoadedCount = 0;
}
private void SetupNeighbors(int x, int y)
{
Chunk.Coords coords = new Chunk.Coords(x, y);
Chunk? chunk = TryGetChunk(x, y);
if (chunk == null)
{
return;
}
Terrain left = GetTerrainOrNull(coords.x - 1, coords.y);
Terrain top = GetTerrainOrNull(coords.x, coords.y + 1);
Terrain right = GetTerrainOrNull(coords.x + 1, coords.y);
Terrain bottom = GetTerrainOrNull(coords.x, coords.y - 1);
chunk.Value.terrain.SetNeighbors(left, top, right, bottom);
}
protected override void OnGenerateTerrain()
{
Chunk.Coords c = chunk.coords;
heightmap = heightmapNoise.GetTiledMap(c.x, c.y, width, height);
alphamap = data.GetAlphamaps(0, 0, width, height);
SetupSplats();
SetupTrees();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
float h = heightmap[y, x];
PaintTexture(x, y, h);
PlaceTree(x, y, h);
}
}
}
private void CreateChunk(Chunk.Coords coords)
{
Terrain terrain = CreateTerrainForChunk(coords);
Chunk chunk = new Chunk();
chunk.coords = coords;
chunk.terrain = terrain;
generator.GenerateChunk(chunk);
chunk.terrain.Flush();
chunkMap.Add(chunk.coords, chunk);
if (setupsNeighbors)
{
SetupNeighbors(chunk.coords.x, chunk.coords.y);
SetupNeighbors(chunk.coords.x + 1, chunk.coords.y);
SetupNeighbors(chunk.coords.x, chunk.coords.y + 1);
SetupNeighbors(chunk.coords.x - 1, chunk.coords.y);
SetupNeighbors(chunk.coords.x, chunk.coords.y - 1);
}
}
private List <Chunk.Coords> GetChunkCoordsToLoad(Chunk.Coords coords)
{
List <Chunk.Coords> loadedChunk = manager.LoadedChunksCoords;
List <Chunk.Coords> list = new List <Chunk.Coords>();
int r2 = createRange * createRange;
for (int x = -createRange; x <= createRange; x++)
{
for (int y = -createRange; y <= createRange; y++)
{
Chunk.Coords c = new Chunk.Coords(coords.x + x, coords.y + y);
bool inRange = x * x + y * y < r2;
bool isLoaded = loadedChunk.Contains(c);
if (inRange && !isLoaded)
{
list.Add(c);
}
}
}
return(list);
}
void Start()
{
Chunk.Coords coords = GetCurrentCoords();
OnChangeChunk(coords);
lastCreatedPosition = focus.position;
}
protected override void GenerateHeightmap()
{
Chunk.Coords c = chunk.coords;
heightmap = noise.GetTiledMap(c.x, c.y, width, height);
}
