/// <summary>
/// Adds a layer to the scene.
/// </summary>
/// <param name="layerRoot">The root visual of the layer.</param>
/// <returns>The created layer.</returns>
public SceneLayer Add(IVisual layerRoot)
{
Contract.Requires <ArgumentNullException>(layerRoot != null);
var distance = layerRoot.CalculateDistanceFromAncestor(_root);
var layer = new SceneLayer(layerRoot, distance);
var insert = FindInsertIndex(layer);
_index.Add(layerRoot, layer);
_inner.Insert(insert, layer);
return(layer);
}
/// <summary>
/// Adds a layer to the scene.
/// </summary>
/// <param name="layerRoot">The root visual of the layer.</param>
/// <returns>The created layer.</returns>
public SceneLayer Add(IVisual layerRoot)
{
_ = layerRoot ?? throw new ArgumentNullException(nameof(layerRoot));
var distance = layerRoot.CalculateDistanceFromAncestor(_root);
var layer = new SceneLayer(layerRoot, distance);
var insert = FindInsertIndex(layer);
_index.Add(layerRoot, layer);
_inner.Insert(insert, layer);
return(layer);
}
