Fast Question about lag and Navigation!

Just 2 fast questions!

1. Lag: i have this simple script:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. public class EnemyAI : MonoBehaviour {
4. Transform target;
5. public float moveSpeed = 0;
6. public float rotationSpeed = 0;
7. Transform  myTransform;
8. public    float maxdistance;
9.  
10.  
11.  
12. void Awake()
13. {
14.     myTransform = transform;
15.  
16.  
17.         target = GameObject.FindWithTag("Player").transform;
18.         maxdistance = 6;
19. }
20.  
21. void Start()
22. {
23.  
24.  
25.  
26. }
27.  
28. void Update () {
29.  
30.  
31.  
32.          
33.         myTransform.rotation = Quaternion.Slerp (myTransform.rotation,
34.                                                  Quaternion.LookRotation (target.position - myTransform.position), rotationSpeed * Time.deltaTime);
35.      
36.         if (Vector3.Distance (target.position, myTransform.position) < maxdistance) {
37.          
38.             myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;
39.         }
40.  
41.                      
42.  
43.  
44.  
45. }

1. Why im getting lag with just 1 Enemy with this script? (i need at least 20 enemys on the lvl (not on the screen at the same time) I used awake function so... i dont get why im getting this lag :S



2. I remember using "Navigation" to tell to the enemys where they can go or not. Now i cant find that option, is disabled on 4.5+ free Unity ? Cant find that option.

Thanks

 

I don't see anything in that code that could be causing any amount of slowdown. The slowest thing happening there would be Vector3.Distance, but that on its own wouldn't cause anything noticeable until there were hundreds of them around.

Disable this script on the object. Does the slowdown still happen? If so, there's something else on your object causing it. If not, then something very weird is going on.

 

Oh well.... You are totally right. Im newbie with unity as you said there is no problem with that script, and with HealthEnemy Script either.

The problem is with the Mesh Collider

I mean, i put a Mesh Collider on the root of the enemy (its an animate one) and i wanna make that enemy hit the player with a melee attack if the distance is <1.5 (not sure if its less). The "cube" where i was testing this simple IA was a cube, so it works flaweslly with the box colider.

So... if its the Mesh Collider cause this lag, how can i solve this? I mean, i need a collider on the body (i can solve that with a capsule collider, but how can i put a collider on the arms?)

 

Quite simply.... don't used a Mesh Collider for characters. Not only are they slow, but I don't think they animate, either.

You can use compound colliders - if you add a collider without a rigidbody to a child of an object that has a rigidbody, that collider becomes a "part" of that rigidbody. And those, you CAN animate!

 

I was out for 3 days, thanks for the reply. Now things work properly and without lag!

So... and how about point 2? anyone knows? I mean i remember with olders versions of Unity i pressed Navigation and go up a menu to modify where a npc could walk/run or not. Im on 4.5 and i cant find that option. There are 3 option on Navigation, and none of them seems that

 

The NavMesh is what you're thinking of, and that's a Pro feature. At least, parts of it always were, I've never been entirely clear. I think automatic NavMesh generation was Pro? Something like that.