void UpdateVisibleChunks()
{
HashSet <Vector2> alreadyUpdatedChunkCoords = new HashSet <Vector2>();
for (int i = visibleTerrainChunks.Count - 1; i >= 0; i--)
{
alreadyUpdatedChunkCoords.Add(visibleTerrainChunks[i].coord);
visibleTerrainChunks[i].UpdateTerrainChunk();
}
int currentChunkCoordX = Mathf.RoundToInt(viewerPosition.x / meshWorldSize);
int currentChunkCoordY = Mathf.RoundToInt(viewerPosition.y / meshWorldSize);
for (int yOffset = -chunksVisibleInViewDst; yOffset <= chunksVisibleInViewDst; yOffset++)
{
for (int xOffset = -chunksVisibleInViewDst; xOffset <= chunksVisibleInViewDst; xOffset++)
{
Vector2 viewedChunkCoord = new Vector2(currentChunkCoordX + xOffset, currentChunkCoordY + yOffset);
if (!alreadyUpdatedChunkCoords.Contains(viewedChunkCoord))
{
if (terrainChunkDictionary.ContainsKey(viewedChunkCoord))
{
terrainChunkDictionary[viewedChunkCoord].UpdateTerrainChunk();
}
else
{
TerrainChunk newChunk = new TerrainChunk(viewedChunkCoord, heightMapSettings, meshSettings, detailLevels, colliderLODIndex, transform, viewer, mapMaterial);
terrainChunkDictionary.Add(viewedChunkCoord, newChunk);
newChunk.onVisibilityChanged += OnTerrainChunkVisibilityChanged;
newChunk.Load();
}
}
}
}
}
void OnTerrainChunkVisibilityChanged(TerrainChunk chunk, bool isVisible)
{
if (isVisible)
{
visibleTerrainChunks.Add(chunk);
}
else
{
visibleTerrainChunks.Remove(chunk);
}
}