Small code change ...

Unity Engine
1

… The following code from Unity script reference, it can do the following:
(Find closest object with tag name Enemy, then print its name)

// Print the name of the closest enemy
print(FindClosestEnemy().name); 

// Find the name of the closest enemy
function FindClosestEnemy () : GameObject {
    // Find all game objects with tag Enemy
    var gos : GameObject[];
    gos = GameObject.FindGameObjectsWithTag("Enemy"); 
    var closest : GameObject; 
    var distance = Mathf.Infinity; 
    var position = transform.position; 
    // Iterate through them and find the closest one
    for (var go : GameObject in gos)  { 
        var diff = (go.transform.position - position);
        var curDistance = diff.sqrMagnitude; 
        if (curDistance < distance) { 
            closest = go; 
            distance = curDistance; 
        } 
    } 
    return closest;    
}

I want make this change:
instead of Printing the closest object name, Go to its position

Original Line:

print(FindClosestEnemy().name);

I’ll replace with this line:

FindClosestEnemy().transform;

is it right ?

2

I did it :wink: here is my game link:
http://dl.dropbox.com/u/42356492/_Unity/WebPlayer/WebPlayer.html
I added some lines in Update function:

function Update () {
//Enemy go to waypoint position
var WaypointPosition;
WaypointPosition = FindClosestEnemy().transform.position;
transform.position = WaypointPosition; 
}

Now, enemy find the nearest point and JUMP to it, how can go to point SMOOTHLY instead of JUMPING ?

3

Search MoveTowards in the Unity API scripting reference. That will get you in the right direction :slight_smile:

Unity - Scripting API: ← thats the link incase you dont know how to get there :slight_smile:

Alternatively, burgzergarcade.com

check out episodes Enemy API 1 + 2. That is basically what you need.

4

:face_with_spiral_eyes: … I used MoveTowards – but enemy still jumping not walking toward waypoint, this is my full code:

function Update () {
//Enemy go to waypoint position
var WaypointPositionX;
var WaypointPositionZ;
WaypointPositionX = FindClosestEnemy().transform.position.x;
WaypointPositionZ = FindClosestEnemy().transform.position.z;
//transform.position = WaypointPosition; 
transform.position = Vector3(Mathf.MoveTowards
(WaypointPositionX, target, speed * Time.deltaTime), 0, Mathf.MoveTowards
(WaypointPositionZ, target, speed * Time.deltaTime));
}

// Find the name of the closest point
function FindClosestEnemy () : GameObject {
    // Find all game objects with tag Waypoint
    var gos : GameObject[];
    gos = GameObject.FindGameObjectsWithTag("Waypoint"); 
    var closest : GameObject; 
    var distance = Mathf.Infinity; 
    var position = transform.position; 
    // Iterate through them and find the closest one
    for (var go : GameObject in gos)  { 
        var diff = (go.transform.position - position);
        var curDistance = diff.sqrMagnitude; 
        if (curDistance < distance) { 
            closest = go; 
            distance = curDistance; 
        } 
    } 
    return closest; 
}

What is my mistake … ?

5

https://www.google.com/search?q=unity+move+gameobject+to+position+over+time

6

Now, when game start, red cube can find nearest waypoint and go to it, but I make some changes in my code to let red cube FACE to waypoint, but there is an error in cube rotation… I need some help:

My Game Link:
http://dl.dropbox.com/u/42356492/_Unity/WebPlayer/WebPlayer.html

My Script:

var endPoint : Vector3;
var duration : float = 1.0;

private var startPoint : Vector3;
private var startTime : float;

function Start () {
	startPoint = transform.position;
    startTime = Time.time;
}

function Update () {
endPoint = FindClosestEnemy().transform.position;
transform.position = Vector3.Lerp(startPoint, endPoint, (Time.time - startTime) / duration);

var newWaypoint : Vector3 = (new Vector3 (endPoint.x, endPoint.y, endPoint.z));
        transform.LookAt (newWaypoint);
        transform.rotation = Quaternion.Euler (new Vector3 (0, transform.rotation.eulerAngles.y, 0));
}

function FindClosestEnemy () : GameObject {
    // Find all game objects with tag Waypoint
    var gos : GameObject[];
    gos = GameObject.FindGameObjectsWithTag("Waypoint"); 
    var closest : GameObject; 
    var distance = Mathf.Infinity; 
    var position = transform.position; 
    // Iterate through them and find the closest one
    for (var go : GameObject in gos)  { 
        var diff = (go.transform.position - position);
        var curDistance = diff.sqrMagnitude; 
        if (curDistance < distance) { 
            closest = go; 
            distance = curDistance; 
        } 
    } 
    return closest; 
}