/// <summary>
/// Removes old unneeded positions from the passed nearbyPositions list.
/// </summary>
/// <param name="nearbyPositions"></param>
/// <param name="needRegenerating"></param>
private void RemoveOldPositions(ref List <GridPosition> nearbyPositions, ref List <Tile> needRegenerating)
{
for (int i = 0; i < Cache.ActiveTiles.Count; i++)
{
bool found = false;
foreach (GridPosition nearby in nearbyPositions)
{
Tile t = Cache.ActiveTiles[i];
if (t.GridPosition == nearby) //Position found in ActiveTiles
{
if (t.IsHeightmapLodValid()) //Correct heightmap, ignore
{
found = true;
break;
}
//Invalid heightmap, mark for regeneration
found = true;
needRegenerating.Add(t);
}
}
if (!found)
{
Cache.CacheTile(Cache.ActiveTiles[i]);
Cache.ActiveTiles.RemoveAt(i);
i--;
}
}
}
/// <summary>
/// Updates tiles that are surrounding the tracked GameObject
/// asynchronously
/// </summary>
public IEnumerator UpdateTiles()
{
List <Vector2> nearbyPositions = GetTilePositionsFromRadius();
List <Vector2> newPositions = Cache.GetNewTilePositions(nearbyPositions);
//Remove old positions
for (int i = 0; i < Cache.ActiveTiles.Count; i++)
{
bool found = false;
foreach (Vector2 nearby in nearbyPositions)
{
if (Cache.ActiveTiles[i].Position == nearby) //Position found, ignore
{
found = true;
break;
}
}
if (!found)
{
Cache.CacheTile(Cache.ActiveTiles[i]);
Cache.ActiveTiles.RemoveAt(i);
i--;
}
}
//Add new positions
foreach (Vector2 pos in newPositions)
{
TerrainTile cached = Cache.GetCachedTileAtPosition(pos);
//Attempt to pull from cache, generate if not available
if (cached != null)
{
Cache.AddActiveTile(cached);
}
else
{
yield return(AddTileAsync(pos));
}
}
}
/// <summary>
/// Updates tiles that are surrounding the tracked GameObject
/// asynchronously. When calling this method using
/// <see cref="MonoBehaviour.StartCoroutine(System.Collections.IEnumerator)"/>,
/// tiles are generated once per frame
/// </summary>
public IEnumerator UpdateTiles()
{
List <GridPosition> nearbyPositions = GetTilePositionsFromRadius();
List <GridPosition> newPositions = Cache.GetNewTilePositions(nearbyPositions);
List <Tile> needRegenerating = new List <Tile>();
//Remove old positions
for (int i = 0; i < Cache.ActiveTiles.Count; i++)
{
bool found = false;
foreach (GridPosition nearby in nearbyPositions)
{
Tile t = Cache.ActiveTiles[i];
if (t.GridPosition == nearby) //Position found in ActiveTiles
{
if (t.IsHeightmapLodValid()) //Correct heightmap, ignore
{
found = true;
break;
}
//Invalid heightmap, mark for regeneration
found = true;
needRegenerating.Add(t);
}
}
if (!found)
{
Cache.CacheTile(Cache.ActiveTiles[i]);
Cache.ActiveTiles.RemoveAt(i);
i--;
}
}
//Add new positions
_queuedTiles = newPositions.Count + needRegenerating.Count;
foreach (GridPosition pos in newPositions)
{
Tile cached = Cache.GetCachedTileAtPosition(pos);
//Attempt to pull from cache, generate if not available
if (cached != null)
{
if (cached.IsHeightmapLodValid()) //Cached tile is valid, use it
{
AddTile(cached);
_queuedTiles--;
continue;
}
//Cached tile has too low lod, mark for regeneration
Debug.Log("Cached tile " + cached + " has heightmap res=" + cached.MeshManager.MeshResolution +
". requested res=" + cached.LodLevel.MeshResolution + ". Regenerating.");
//Cache.RemoveCachedTile(cached);
needRegenerating.Add(cached);
Cache.AddActiveTile(cached);
continue;
}
//Generate one tile per frame
if (Application.isPlaying)
{
yield return(null);
}
_isGeneratingTile = true;
AddTileAt(pos, tile => {
_queuedTiles--;
_isGeneratingTile = false;
if (_queuedTiles == 0)
{
_queueCompletedAction(newPositions.ToArray());
}
});
}
//Regenerate tiles with outdated positions
for (int i = 0; i < needRegenerating.Count; i++)
{
Tile t = needRegenerating[i];
Debug.Log("Active tile " + t + " has heightmap res=" + t.MeshManager.MeshResolution +
". requested res=" + t.LodLevel.MeshResolution + ". Regenerating.");
//Generate one tile per frame
if (Application.isPlaying)
{
yield return(null);
}
_isGeneratingTile = true;
AddTileAt(t.GridPosition, tile => {
_queuedTiles--;
_isGeneratingTile = false;
//Remove low res tile
Cache.RemoveActiveTile(t);
Cache.RemoveCachedTile(t);
if (_queuedTiles == 0)
{
_queueCompletedAction(newPositions.ToArray());
}
});
}
//If tiles were updated synchronously, notify queue completion
if (newPositions.Count > 0 && _queuedTiles == 0)
{
_queueCompletedAction(newPositions.ToArray());
}
}