void OnTerrainChunkVisibilityChanged(TerrainChunk chunk, bool isVisible)
{
if (isVisible)
{
VisibleTerrainChunks.Add(chunk);
}
else
{
VisibleTerrainChunks.Remove(chunk);
}
}
void UpdateVisibleChunks()
{
var alreadyUpdatedChunkCoords = new HashSet <Vector2>();
for (int i = VisibleTerrainChunks.Count - 1; i > -1; i--)
{
alreadyUpdatedChunkCoords.Add(VisibleTerrainChunks[i].Coord);
VisibleTerrainChunks[i].UpdateTerrainChunk();
}
int currentChunkCoordX = Mathf.RoundToInt(viewerPosition.x / _worldSize);
int currentChunkCoordY = Mathf.RoundToInt(viewerPosition.y / _worldSize);
for (int yOffset = -_chunksVisibleInViewDistance; yOffset <= _chunksVisibleInViewDistance; yOffset++)
{
for (int xOffset = -_chunksVisibleInViewDistance; xOffset <= _chunksVisibleInViewDistance; xOffset++)
{
var viewedChunkCoord = new Vector2(currentChunkCoordX + xOffset, currentChunkCoordY + yOffset);
if (!alreadyUpdatedChunkCoords.Contains(viewedChunkCoord))
{
if (_terrainChunkDictionary.ContainsKey(viewedChunkCoord))
{
_terrainChunkDictionary[viewedChunkCoord].UpdateTerrainChunk();
}
else
{
var terrainChunk = new TerrainChunk(
viewedChunkCoord,
heightMapSettings,
meshSettings,
detailLevels,
colliderLODIndex,
transform,
viewer,
mapMaterial);
_terrainChunkDictionary.Add(viewedChunkCoord,
terrainChunk);
terrainChunk.OnVisibilityChanged += OnTerrainChunkVisibilityChanged;
terrainChunk.Load();
}
}
}
}
}