public QuadNode(QuadNode parent, NodeChild position)
{
//array for neighbors at each sides
this._neighbors = new QuadNode[4];
//array for all the nine vertices of the current node
this._vertices = new TerrainVertex[QuadNode.VerticesNumber];
//the interpolated position difference with the real position
this._realToInterpolatedVertexHeight = new float[QuadNode.SidesNumber];
this._parent = parent;
this._position = position;
if (parent == null)
this._depth = 0;
else
{
this._depth = Convert.ToByte(parent.Depth + 1);
this._parentTree = parent._parentTree;
}
}
public void RemoveReferenceFrom(QuadNode node)
{
this._references.Remove(node);
}
public void AddReferenceTo(QuadNode node)
{
if (this._references.IndexOf(node) >= 0)
return;
this._references.Add(node);
}
/// <summary>
/// <para>Add a child at the specified position and enable its flag.</para>
/// </summary>
/// <param name="position"></param>
/// <param name="flag"></param>
private void AddChild(NodeChild position, NodeContent flag)
{
this.EnableVertex(flag);
QuadNode node = new QuadNode(this, position);
this.Childs[(int)position] = node;
float size = node.GetNodeSize();
switch (position)
{
case NodeChild.NorthWest:
node.Location = this.Location + new Vector2(0, size);
break;
case NodeChild.NorthEast:
node.Location = this.Location + new Vector2(size, size);
break;
case NodeChild.SouthWest:
node.Location = this.Location + new Vector2(0, 0);
break;
default:
node.Location = this.Location + new Vector2(size, 0);
break;
}
node.InitializeNeighbors();
this.InitializeNeighbors();
node.Initialize();
switch (position)
{
case NodeChild.NorthWest:
this.EnableVertex(NodeContent.NorthVertex, NodeVertex.North);
this.EnableVertex(NodeContent.WestVertex, NodeVertex.West);
break;
case NodeChild.NorthEast:
this.EnableVertex(NodeContent.NorthVertex, NodeVertex.North);
this.EnableVertex(NodeContent.EastVertex, NodeVertex.East);
break;
case NodeChild.SouthWest:
this.EnableVertex(NodeContent.SouthVertex, NodeVertex.South);
this.EnableVertex(NodeContent.WestVertex, NodeVertex.West);
break;
default:
this.EnableVertex(NodeContent.SouthVertex, NodeVertex.South);
this.EnableVertex(NodeContent.EastVertex, NodeVertex.East);
break;
}
}