/// <summary>
/// Removes all children from this node.
/// </summary>
public virtual void RemoveChildren()
{
if (children.Count == 0)
{
return;
}
foreach (Node node in children)
{
node.Parent = null;
node.SceneGraph = null;
if (node is BranchNode)
{
foreach (Node child in ((BranchNode)node).Children)
{
PropagateSceneGraph(child);
}
}
// at this time, still don't remove the node from children to guarantee thread-safe operation
// will be actually removed right before processing the scene graph in Scene class
NodeChangeInfo info = new NodeChangeInfo();
info.Node = node;
info.Type = ChangeType.Remove;
changeList.Add(info);
}
}
/// <summary>
/// Adds a child to this node.
/// </summary>
/// <param name="node">The child node to be added</param>
public virtual void AddChild(Node node)
{
if (node.Parent != null)
{
throw new GoblinException(node.Name + " already has a parent");
}
if (children.Contains(node))
{
throw new GoblinException("This child is already added to this node");
}
if (node == this)
{
throw new GoblinException("You cannot add a node to itself");
}
if (node.Parent == this)
{
throw new GoblinException(Name + " already has " + node.Name + " as child");
}
CheckForLoops(node);
if (scene != null && scene.IsStarted)
{
// at this time, still don't add the node to children to guarantee thread-safe operation
// will be actually added during processing the scene graph in Scene class
NodeChangeInfo info = new NodeChangeInfo();
info.Node = node;
info.Type = ChangeType.Add;
changeList.Add(info);
}
// if the scene hasn't started processing the tree yet, then it's safe to add now
else
{
children.Add(node);
}
node.Parent = this;
PropagateSceneGraph(node);
}
/// <summary>
/// Removes all children from this node.
/// </summary>
public virtual void RemoveChildren()
{
if (children.Count == 0)
return;
foreach (Node node in children)
{
node.Parent = null;
node.SceneGraph = null;
if(node is BranchNode)
foreach (Node child in ((BranchNode)node).Children)
PropagateSceneGraph(child);
// at this time, still don't remove the node from children to guarantee thread-safe operation
// will be actually removed right before processing the scene graph in Scene class
NodeChangeInfo info = new NodeChangeInfo();
info.Node = node;
info.Type = ChangeType.Remove;
changeList.Add(info);
}
}
/// <summary>
/// Adds a child to this node.
/// </summary>
/// <param name="node">The child node to be added</param>
public virtual void AddChild(Node node)
{
if (node.Parent != null)
throw new GoblinException(node.Name + " already has a parent");
if (children.Contains(node))
throw new GoblinException("This child is already added to this node");
if (node == this)
throw new GoblinException("You cannot add a node to itself");
if (node.Parent == this)
throw new GoblinException(Name + " already has " + node.Name + " as child");
CheckForLoops(node);
if (scene != null && scene.IsStarted)
{
// at this time, still don't add the node to children to guarantee thread-safe operation
// will be actually added during processing the scene graph in Scene class
NodeChangeInfo info = new NodeChangeInfo();
info.Node = node;
info.Type = ChangeType.Add;
changeList.Add(info);
}
// if the scene hasn't started processing the tree yet, then it's safe to add now
else
children.Add(node);
node.Parent = this;
PropagateSceneGraph(node);
}