Another NavMeshAgent not stopping, could you please have a look?

Behavior & Navigation Navigation
1

Hi guys,

Apologies for making yet another thread on NavMeshAgents but believe me, I have looked at most topics reading each one of them over and over and none of the solutions I’ve found were able to help me out. Yes I am a noob, maybe not to scripting but a big yes to Unity and Java.

Well the deal is, my Agent slides or rather moves for apparently a fixed distance before it stops. I have tried several NavMeshAgent methods, Stop(), enable(), ResetPath(), SetPath() to itself but it keeps moving towards the target or just straight if I ResetPath(). I am suspicious that this is not something with my code, maybe something with one of the NavMeshAgent’s variables even thoughI have also changed accelaration et al to several super-small or large values?

If any of you would be kind enough to give me pointers it would be immensely appreciated. It may well be something silly and I will embarrass myself yet again on a different forum.

var Distance;
var target : Transform;
var searchDistance = 45.0;
var interestDistance = 30.0;
var chaseRange = 15.0;
var Damping = 6.0; //smooths rotation

private var navMeshComponent: NavMeshAgent;

function Start () 
{
 	navMeshComponent = gameObject.GetComponent(NavMeshAgent);
}

function Update ()
{

	Distance = Vector3.Distance(target.position, transform.position);
	
	if (Distance > searchDistance)
	{
		animation.Play("LookAround01");
		
	}
	
		if (Distance < searchDistance  Distance > interestDistance)
	{
		navMeshComponent.ResetPath(); // it does indeed reset the path, it stops following
		navMeshComponent.SetDestination(transform.position); // keeps sliding
		navMeshComponent.Stop(true); // keeps sliding		
		search();		
	}
	
	if (Distance < interestDistance  Distance > chaseRange)
	{			
		investigate();		
	}
	
	if (Distance < chaseRange)
	{
		chase();		
	}
}

//FUNCTIONS

function search ()
{		
	var rotation = Quaternion.LookRotation(target.position - transform.position);
	transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.deltaTime * Damping);
	animation.Play("LookAround01");
	
}

function investigate ()
{
	navMeshComponent.destination = target.position;
	navMeshComponent.speed = 3.0;
	animation.CrossFade("AngryWalk_AngryWalk");	
}

function chase ()
{	
	navMeshComponent.destination = target.position;
	navMeshComponent.speed = 7.0;
	animation.CrossFade("Running01");	
}

Many thanks!

2

have you tried turning off automatic move/rotate, and handling it yourself?

you can probably turn it off and on as required if you dont want to handle the movement youself.

probably the easiest way.

3

Thank you for you reply James, yes I’ve tried that by setting:

navMeshComponent.updatePosition = false;

And the agent still moves towards me, it shifts to the “LookAround01” animation in the search() function when I reach the specified distance but it keeps moving towards me using this animation which actually looks like if he’s ice skating but to be honest this stopped being funny a few hours ago.

I have no idea what is going on. My acceleration value is set to 80, played with other settings just to see if the agent was taking its time before stopping but I am yet to be successful on this.

4

There are no other scripts moving it?

5

Nope, no other scripts. It seems that nothing within this if clause is working:

    if (Distance < searchDistance  Distance > interestDistance)

    {

        navMeshComponent.ResetPath(); // it does indeed reset the path, it stops following

        navMeshComponent.SetDestination(transform.position); // keeps sliding

        navMeshComponent.Stop(true); // keeps sliding       

        search();       

    }

Maybe I’m too tired to spot something wrong here? I have no idea why it isn’t calling ‘search()’. I’ve disabled my if clause that plays ‘LookAround01’ and now I see that the animation is not being called on the search() nor if I place the animation in the if clause above.

6

Not sure if this is exactly what you need but this is what worked for me:

http://forum.unity3d.com/threads/180498-Stopping-navmesh-AI-from-getting-too-close

7

Thanks Sajid, I have tried .enable and I have read your topic many times. It was something with my if clause and I just can’t figure it out. I have eliminated the if clause and worked around it and now I am getting the expected behavior. Not ideal I have to say but at least I can move forward. Thanks to you and James for taking the time to reply to this thread.

8

Glad to hear you got it working.

Mind posting the script so people who come across this thread later on can figure it out as well?

9

Sure, but I really haven’t done much to be honest. I have eliminated one of my if clauses and used the .Stop and .Resume functions which were not working within the eliminated if clause for some obscure reason, I’ve used .Stop(true) when the player gets too far and the .Resume() in the investigate() function called when the player gets closer.

Here it is:

var Distance;
var target : Transform;
var searchDistance = 45;
var interestDistance = 30;
var chaseRange = 15;
var Damping = 6.0; //smooths rotation

private var navMeshComponent: NavMeshAgent;

function Start () 
{
 	navMeshComponent = gameObject.GetComponent(NavMeshAgent);
}

function Update ()
{

	Distance = Vector3.Distance(target.position, transform.position);
	
	if (Distance > interestDistance)
	{
		animation.CrossFade("LookAround01");
		navMeshComponent.Stop(true);		
	}
	
	if (Distance <= interestDistance  Distance >= chaseRange)
	{			
		investigate();		
	}
	
	if (Distance < chaseRange)
	{
		chase();		
	}
}

//FUNCTIONS


function investigate ()
{
	navMeshComponent.Resume();
	navMeshComponent.destination = target.position;
	navMeshComponent.speed = 3.0;
	animation.CrossFade("AngryWalk_AngryWalk");	
}

function chase ()
{	
	navMeshComponent.destination = target.position;
	navMeshComponent.speed = 7.0;
	animation.CrossFade("Running01");	
}
10

In your first IF statement in Update(), It should be ( Distance > searchDistance )

This code works as expected:

using UnityEngine;
using System.Collections;

public class NavMeshComponent : MonoBehaviour {

public Transform target;
public float searchDistance = 20.0f;
public float interestDistance = 15.0f;
public float chaseRange = 10.0f;
public float damping = 5.0f;
       
private NavMeshAgent _navMeshComponent;
private float distance;
    void Start(){
           
        _navMeshComponent = GetComponent<NavMeshAgent>();
    }
    
    void Update(){
           
    
        distance = Vector3.Distance( target.position, transform.position);

        if ( distance > searchDistance ){ search(); }
        if ( distance < interestDistance &&  distance > chaseRange ){ investigate(); }
        if ( distance < chaseRange ){ chase(); }
    }
    
    private void search(){
       
        Debug.Log( "search()" );
       
        //animation.CrossFade("LookAround01");
        _navMeshComponent.Stop(true);                
    }

    private void investigate(){
           
        Debug.Log( "investigate()" );
       
        _navMeshComponent.Resume();
        _navMeshComponent.destination = target.position;
        _navMeshComponent.speed = 3.0f;
        //animation.CrossFade("AngryWalk_AngryWalk");
    }
    
    private void chase(){
       
        Debug.Log( "chase()" );
       
        _navMeshComponent.destination = target.position;
        _navMeshComponent.speed = 7.0f;
        //animation.CrossFade("Running01");
    }
}