/// <summary>
/// Begins the rendering process on all layers.
/// </summary>
private void BeginLayerRender()
{
if (_graphicsService == null)
{
_graphicsService = GameResourceFactory?.CreateGraphicsService();
}
_graphicsService.Clear(BackgroundColor);
foreach (var layer in _layers.Values)
{
layer.Begin();
}
}
/// <summary>
/// Adds a layer with given name. DefaultLayer is 0, to go under go negative, to go above add positive.
/// Layers are rendered in order of this zOrder.
/// </summary>
/// <param name="name"></param>
/// <param name="zOrder"></param>
/// <returns></returns>
public Layer AddLayer(string name, int zOrder)
{
if (GameResourceFactory == null)
{
throw new InvalidOperationException("GameResourceFactory must be assigned before a DefaultLayer can be accessed");
}
var layer = new Layer(name, GameResourceFactory.CreateSpriteBatch());
_layers.Add(zOrder, layer);
return(layer);
}
