public Node insert(Node root, MobileObject /*int*/ v)
{
if (root.value == null)
{
root = new Node();
root.value = v;
root.parent = null;
}
// insertion logic, if the value (v )is < root, insert to the root.left
// otherwise it's >=, so insert to the right
//Objects are sorted based on their distance from origin
//Parent tracking takes place here, but won't work for MOBS no matter how you do it
else if (v.Dfo < root.value.Dfo)
{
Node Left = insert(root.left, v);
root.left = Left;
Left.parent = root;
}
else
{
Node Right = insert(root.right, v);
root.right = Right;
Right.parent = root;
}
return(root);
}
public void Delete(MobileObject key)
{
//first find the node in the tree to delete and assign to item pointer/reference
Node item = Find(key);
Node X = null;
Node Y = null;
if (item == null)
{
Console.WriteLine("Nothing to delete!");
return;
}
if (item.left == null || item.right == null)
{
Y = item;
}
else
{
Y = TreeSuccessor(item);
}
if (Y.left != null)
{
X = Y.left;
}
else
{
X = Y.right;
}
if (X != null)
{
X.parent = Y;
}
if (Y.parent == null)
{
root = X;
}
else if (Y == Y.parent.left)
{
Y.parent.left = X;
}
else
{
Y.parent.left = X;
}
if (Y != item)
{
item.value = Y.value;
}
if (Y.colour == Color.Black)
{
DeleteFixUp(X);
}
}
/// <summary>
/// Find item in the tree
/// </summary>
/// <param name="key"></param>
/// <summary>
/// Insert a new object into the RB Tree
/// </summary>
/// <param name="item"></param>
public void Insert(MobileObject item)
{
Node newItem = new Node();
newItem.value = item;
if (root == null)
{
root = newItem;
root.colour = Color.Black;
return;
}
Node Y = null;
Node X = root;
while (X != null)
{
Y = X;
if (newItem.value.CompareTo(X.value) == -1)
{
X = X.left;
}
else
{
X = X.right;
}
}
newItem.parent = Y;
if (Y == null)
{
root = newItem;
}
else if (newItem.value.CompareTo(Y.value) == -1)
{
Y.left = newItem;
}
else
{
Y.right = newItem;
}
newItem.left = null;
newItem.right = null;
newItem.colour = Color.Red; //colour the new node red
InsertFixUp(newItem); //call method to check for violations and fix
}
public Node insert(Node root, MobileObject v)
{
if (root == null)
{
root = new Node();
root.value = v;
}
else if (v.CompareTo(root.value) == -1)
{
root.left = insert(root.left, v);
root = balance_tree(root);
}
else
{
root.right = insert(root.right, v);
root = balance_tree(root);
}
return(root);
}
/// <summary>
/// Deletes a specified value from the tree
/// </summary>
/// <param name="item"></param>
///
public Node Find(MobileObject key)
{
bool isFound = false;
Node temp = root;
Node item = null;
while (!isFound)
{
if (temp == null)
{
break;
}
if (key.CompareTo(temp.value) == -1)
{
temp = temp.left;
}
if (key.CompareTo(temp.value) == 1)
{
temp = temp.right;
}
if (key.CompareTo(temp.value) == 0)
{
isFound = true;
item = temp;
}
}
if (isFound)
{
Console.WriteLine("{0} was found", key);
return(temp);
}
else
{
Console.WriteLine("{0} not found", key);
return(null);
}
}
static void Main(string[] args)
{
Node root = new Node();
BinarySearchTree bst = new BinarySearchTree();
AVLTree avl = new AVLTree();
RB rb = new RB();
SplayTree <MobileObject, MobileObject> splay = new SplayTree <MobileObject, MobileObject>();
Stopwatch bstWatch = new Stopwatch();
Stopwatch avlWatch = new Stopwatch();
Stopwatch rbWatch = new Stopwatch();
Stopwatch splayWatch = new Stopwatch();
//My laptop refuses to load more than 100 or so objects, it just won't do it
MobileObject[] MOBArray = new MobileObject[100];
MobileObject[] MOBArray2 = new MobileObject[20];
Random rnd = new Random();
//testing
for (int i = 0; i < MOBArray2.Length; i++)
{
MOBArray2[i] = new Vehicle(i.ToString(), i, i, i, i, i, i);
}
foreach (MobileObject item in MOBArray2)
{
bst.insert(root, item);
avl.insert(root, item);
rb.Insert(item);
splay.Add(item, item);
}
Console.WriteLine("rb tree find function test: found matching mob, dfo = " + MOBArray2[3].Dfo);
Console.WriteLine();
//For sorted insert
for (int i = 0; i < MOBArray.Length; i++)
{
MOBArray[i] = new Vehicle(i.ToString(), i, i, i, i, i, i);
}
//Unsorted insert
/* for(int i = 0; i<MOBArray.Length; i++)
* {
* MOBArray[i] = new Vehicle(i.ToString(), i, rnd.Next(100), rnd.Next(100), rnd.Next(100), rnd.Next(100), rnd.Next(100));
* } */
bstWatch.Start();
foreach (MobileObject item in MOBArray)
{
bst.insert(root, item);
}
bstWatch.Stop();
avlWatch.Start();
foreach (MobileObject item in MOBArray)
{
avl.insert(root, item);
}
avlWatch.Stop();
rbWatch.Start();
foreach (MobileObject item in MOBArray)
{
rb.Insert(item);
}
rbWatch.Stop();
splayWatch.Start();
foreach (MobileObject item in MOBArray)
{
splay.Add(item, item);
}
splayWatch.Stop();
Console.WriteLine("BST time(ticks) = " + bstWatch.ElapsedTicks);
Console.WriteLine("AVL time(ticks) = " + avlWatch.ElapsedTicks);
Console.WriteLine("RB time(ticks) = " + rbWatch.ElapsedTicks);
Console.WriteLine("splay time(ticks) = " + splayWatch.ElapsedTicks);
Console.ReadLine();
}
