/// <summary>
/// Constructor of SceneTree class
/// </summary>
/// <param name="name">Name of the scene tree</param>
/// <param name="renderer">Renderer</param>
/// <param name="assetEngine">AssetEngine</param>
internal SceneTree(string name, Renderer renderer, AssetEngine assetEngine)
{
Name = name;
_renderer = renderer;
AssetEngine = assetEngine;
_camManager = new CameraManager(this);
_root = CreateNode();
}
/// <summary>
/// Detaches parent node
/// </summary>
void IMovable.DetachParent()
{
_parentNode = null;
}
/// <summary>
/// Attaches a parent node
/// </summary>
/// <param name="parent">Parent node</param>
void IMovable.AttachParent(SceneNode parent)
{
if(parent == null)
throw new ArgumentNullException("parent");
_parentNode = parent;
}
/// <summary>
/// Attaches the camera to a scene node<br />
/// <remarks>(Used internally)</remarks>
/// </summary>
/// <param name="parent">Parent scene node</param>
void IMovable.AttachParent(SceneNode parent)
{
if(parent == null)
throw new ArgumentNullException("parent");
ParentTransform = parent;
RequireUpdate();
}
/// <summary>
/// Destroys a node in this graph
/// </summary>
/// <param name="node">Node to destroy</param>
public void DestroyNode(SceneNode node)
{
if(node.Scene != this)
throw new ArgumentException("Already attached to another tree", "node");
if(node == _root)
throw new ArgumentException("Cannot destroy root node", "node");
Node parent = node.ParentNode;
if (parent != null)
parent.RemoveChild(node);
node.DestroyAllChild();
_nodes.Remove(node);
}
/// <summary>
/// Creates a new node in this graph
/// </summary>
/// <returns>Returns a new node</returns>
public SceneNode CreateNode()
{
SceneNode node = new SceneNode(this);
_nodes.Add(node);
return node;
}
