/// <summary>
/// Creates a tile layer by reading the contentManager we got from the SharpTiles library. This will create our tile layers of type "Floor" and "Objects".
/// </summary>
/// <param name="layerContent"></param>
/// <param name="tileSets"></param>
/// <returns></returns>
private TileLayer CreateTileLayer(LayerContent layerContent, IEnumerable <TileSetContent> tileSets)
{
if (layerContent == null)
{
throw new ArgumentNullException("layerContent");
}
if (tileSets == null)
{
throw new ArgumentNullException("tileSets");
}
TileLayerContent tileLayerContent = layerContent as TileLayerContent;
TileLayerType tileLayerType = GetTileLayerType(layerContent);
TileLayer tileLayer = new TileLayer(layerContent.Name, tileLayerContent.Width, tileLayerContent.Height, tileLayerType);
foreach (uint tileID in tileLayerContent.Data)
{
uint flippedHorizontallyFlag = 0x80000000;
uint flippedVerticallyFlag = 0x40000000;
int tileIndex = (int)(tileID & ~(flippedVerticallyFlag | flippedHorizontallyFlag));
Tile tile = CreateTile(tileIndex, tileSets, tileLayerType);
tileLayer.AddTile(tile);
}
return(tileLayer);
}
public TileLayer(string name, int width, int height, TileLayerType type)
{
Type = type;
Name = name;
Width = width;
Height = height;
}
/// <summary>
/// Based on the tile layer type passed, this method returns a tile type for all tiles that would be contained in a layer of that type.
/// </summary>
/// <param name="tileLayerType"></param>
/// <returns></returns>
private static TileType GetTileType(TileLayerType tileLayerType)
{
TileType tileType = TileType.None;
if (tileLayerType == TileLayerType.Floor)
{
tileType = TileType.Floor;
}
if (tileLayerType == TileLayerType.Objects)
{
tileType = TileType.Object;
}
return(tileType);
}
/// <summary>
/// Returns the type of the tile layer according to the layer's name as read from the Tiled map editor.
/// </summary>
/// <param name="layerContent"></param>
/// <returns></returns>
private static TileLayerType GetTileLayerType(LayerContent layerContent)
{
if (layerContent == null)
{
throw new ArgumentNullException("layerContent");
}
TileLayerType tileLayerType = TileLayerType.None;
if (layerContent.Name.Contains("Floor"))
{
tileLayerType = TileLayerType.Floor;
}
else if (layerContent.Name.Contains("Objects"))
{
tileLayerType = TileLayerType.Objects;
}
return(tileLayerType);
}
/// <summary>
/// Based on a passed tile index, create a Tile by looking up which TileSet it belongs to, assign the proper TilSet texture,
/// and find the bounds of the rectangle that encompasses the correct tile texture within the total tileset texture.
/// </summary>
/// <param name="tileIndex">Index of the tile (GID) within the map file</param>
/// <param name="tileSets">Enumerable list of tilesets used to find out which tileset a tile belongs to</param>
/// <param name="tileLayerType"></param>
/// <returns></returns>
private Tile CreateTile(int tileIndex, IEnumerable <TileSetContent> tileSets, TileLayerType tileLayerType)
{
if (tileSets == null)
{
throw new ArgumentNullException("tileSets");
}
Tile tile = new Tile();
// we don't want to look up tiles with ID 0 in tile sets because Tiled Map Editor treats ID 0 as an empty tile
if (tileIndex > Tile.EmptyTileID)
{
Texture tileSetTexture = null;
Rectangle source = new Rectangle();
foreach (TileSetContent tileSet in tileSets)
{
if (tileIndex - tileSet.FirstGID < tileSet.Tiles.Count)
{
tileSetTexture = tileSet.Texture;
source = tileSet.Tiles[tileIndex - tileSet.FirstGID].SourceTextureBounds;
break;
}
}
TileType tileType = GetTileType(tileLayerType);
tile = new Tile(tileSetTexture, source, TileWidth, TileHeight, tileType);
}
return(tile);
}
