/// <summary>
/// Remove a single map overlay from the map.
/// </summary>
/// <param name="mapOverlay">Map overlay to remove.</param>
/// <returns>True if map overlay was found and removed, otherwise false.</returns>
public bool RemoveMapOverlay(MapOverlay mapOverlay)
{
if (HasOverlayData && mapOverlays.Remove(mapOverlay))
{
overlayDataAltered = true;
return(true);
}
return(false);
}
/// <summary>
/// Loads overlay data from map file if it hasn't already been loaded.
/// </summary>
/// <returns>Array of error messages if something went wrong, otherwise null.</returns>
public string[] LoadOverlayData()
{
if (mapOverlays != null)
{
return new string[] { "Overlay data has already been loaded." }
}
;
List <string> errorMessages = new List <string>();
byte[] overlayPack = new byte[1 << 18];
string errorMessage = ParseEncodedMapSectionData("OverlayPack", ref overlayPack, true);
if (errorMessage != null)
{
errorMessages.Add(errorMessage);
}
byte[] overlayDataPack = new byte[1 << 18];
errorMessage = ParseEncodedMapSectionData("OverlayDataPack", ref overlayDataPack, true);
if (errorMessage != null)
{
errorMessages.Add(errorMessage);
}
if (errorMessages.Count < 1)
{
mapOverlays = new List <MapOverlay>(overlayPack.Length);
for (int i = 0; i < overlayPack.Length; i++)
{
byte index = overlayPack[i];
byte frame = overlayDataPack[i];
short x = (short)(i % 512);
short y = (short)((i - x) / 512);
MapOverlay overlay = new MapOverlay(x, y, index, frame);
overlay.PropertyChanged += MapOverlay_PropertyChanged;
mapOverlays.Add(overlay);
}
overlayDataAltered = false;
}
return(errorMessages.Count > 0 ? errorMessages.ToArray() : null);
}
/// <summary>
/// Replaces map overlay with another assuming tile coordinates match an existing map overlay.
/// </summary>
/// <param name="mapOverlay">Map overlay to replace existing map overlay with.</param>
/// <returns>True if map overlay was replaced, otherwise false.</returns>
public bool ReplaceMapOverlay(MapOverlay mapOverlay)
{
if (HasOverlayData)
{
int index = mapOverlays.FindIndex(t => t.X == mapOverlay.X && t.Y == mapOverlay.Y);
if (index < 0)
{
return(false);
}
mapOverlays[index] = mapOverlay;
mapOverlay.PropertyChanged -= MapOverlay_PropertyChanged;
mapOverlay.PropertyChanged += MapOverlay_PropertyChanged;
tileDataAltered = true;
return(true);
}
return(false);
}
