From 2D to 3D

i found this application made with unity3D and i need help to know the way that i must be in.(sorry for my English)
The question is how can i switch from 2D lines to 3D cube interface?
thanks for help :)))
link text

I think this algorithm can do what you want: when the player starts recording a path, each time the distance from the last point saved reaches a limit, a new point is added. It continues until a predefined number of waypoints is reached. While adding points, cubes are added connecting each point to the previous.

This script does this: create an empty object, attach this script to it and set the player variable to your player; press ā€œpā€ to delete the path and start recording a new one.

var player: Transform; // drag the player here, or find it at Start
var wpDistance: float = 6; // distance between waypoints
var maxWaypoints: int = 20; // number of waypoints to create
private var waypoints = new Vector3[0];
private var cubes = new GameObject[0];
private var curWP = 0;
private var lastWP: Vector3;
private var recording = false;

function AddPoint(){
	var n = curWP;
	curWP += 1;
	waypoints[n] = player.position;
	if (n > 0){
		// create cube
		var cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
		// cube placed between 2 last waypoints
		cube.transform.position = (player.position+lastWP)/2;
		// get difference between 2 last waypoints
		var dir = player.position-lastWP;
		// rotate cube to the correct direction
		cube.transform.forward = dir.normalized;
		// adjust length and set width to 2x2
		var scale = Vector3(2, 2, dir.magnitude);
		cube.transform.localScale = scale;
		cubes[n] = cube;
	}
    lastWP = player.position;
}

// call this function to initiate a new path:
function ResetPath(){
	for (var i=0; i < cubes.length; i++){
		if (cubes_) Destroy(cubes*);*_
_*	}*_
 _*waypoints = new Vector3[maxWaypoints];*_
_*	cubes = new GameObject[maxWaypoints];*_
 _*curWP = 0;*_
_*	recording = true;*_
_*	AddPoint();*_
_*}*_
_*// call this at Update while creating a new path -*_
_*// recording becomes false when path finished*_
_*function RecordPath(){*_
_*	if (curWP < maxWaypoints){*_
_*		var dist = Vector3.Distance(player.position, lastWP);*_
_*		if (dist >= wpDistance) AddPoint();*_
_*	}*_
_*	else {*_
_*		recording = false;*_
_*	}*_
_*}*_
_*function Update(){*_
_*	if (Input.GetKeyDown("p")){*_
_*		ResetPath();  // delete old path and start recording*_
_*	}*_
_*	if (recording){   // while path not ready...*_
_*		RecordPath(); // record path*_
_*	}*_
_*}*_
_*
*_