/// <summary>
/// Load the information for a single tile (as in parse the needed .t -file.
/// </summary>
/// <param name="tileX">The cornerIndexX-value of the tile number</param>
/// <param name="tileZ">The cornerIndexZ-value of the tile number</param>
/// <param name="loTiles">Loading LO tile (Distant Mountain) or not</param>
/// <returns>The tile information as a 'Tile' object</returns>
private Tile LoadTile(int tileX, int tileZ, bool loTiles)
{
TileHelper.Zoom zoom = loTiles ? TileHelper.Zoom.DMSmall : TileHelper.Zoom.Small;
string path = loTiles ? this.lotilesPath : this.tilesPath;
// Note, code is similar to ORTS.Viewer3D.TileManager.Load
// Check for 1x1 or 8x8 tiles.
TileHelper.Snap(ref tileX, ref tileZ, zoom);
// we set visible to false to make sure errors are loaded
Tile newTile = new Tile(path, tileX, tileZ, zoom, false);
if (newTile.Loaded)
{
return(newTile);
}
else
{
// Check for 2x2 or 16x16 tiles.
TileHelper.Snap(ref tileX, ref tileZ, zoom - 1);
newTile = new Tile(tilesPath, tileX, tileZ, zoom - 1, false);
if (newTile.Loaded)
{
return(newTile);
}
}
return(null);
}
/// <summary>
/// Make sure the Tile and its needed textures are loaded. This means checking if it is already loaded, (or at least tried to load)
/// and if it is not loaded, load it.
/// </summary>
/// <param name="tileX">The cornerIndexX-value of the tile number</param>
/// <param name="tileZ">The cornerIndexZ-value of the tile number</param>
private void EnsureTileIsLoaded(int tileX, int tileZ)
{
uint index = this.locationTranslator.TileIndex(tileX, tileZ, 1);
if (loadedTerrainTiles.Contains(index))
{
return;
}
loadedTerrainTiles.Add(index); // whatever comes next, there is not need to reload this tile ever again.
Tile newTile = LoadTile(tileX, tileZ, false);
if (newTile == null)
{
newTile = LoadTile(tileX, tileZ, true);
if (newTile == null)
{
return;
}
}
uint storeIndex = this.locationTranslator.TileIndex(tileX, tileZ, newTile.Size);
if (terrainTiles.ContainsKey(storeIndex))
{
// this larger than 1x1 tile has already been loaded from a different tileX and tileZ
return;
}
var newTerrainTile = new TerrainTile2D(newTile, textureManager, locationTranslator);
terrainTiles.Add(storeIndex, newTerrainTile);
SetTerrainReduction();
}