Stop a Navmesh agent mid path

Question

i have a third person hack 'n slash i'm working on and no, it is not a button masher. The combat needs skill to execute attacks plus no auto targeting. Anyhoo, I've hot the player side of things set up and now comes the AI. I'm using Navmesh and mecanim to move the agents. The agent has a rigidbody with a custom third person controler attached. I can get him to patrol nicely. Then the player shows up and he has to stop and come towards the player. However my agent is determined to finish his patrol route.

 void Start (){
 navmeshAgent.updateRotation = false;
 navmeshAgent.updatePosition = true;
 target = GameObject.FindGameObjectWithTag("waypoint2").transform;
 //find game object will change to specific transforms later
 }
 
 //then later in update:
 navmeshAgent.SetDestination(target.position);
 
         if (navmeshAgent.remainingDistance > navmeshAgent.stoppingDistance)
             enemyChar.move(navmeshAgent.desiredVelocity);
         else
             enemyChar.move(Vector3.zero);
             
 //much later on I pass the Vector3 values to mecanim and animate the mesh.
 //this is in another class though

Now go ahead and try to enemyChar.move(Vector3.zero); He wont stop. navmeshAgent.ResetPath()? No thanks. Set him a new destination? He likes his old one. I did manage to het him to stop by miving the waypoint but that's not the way to do it I think. Help.

Answer 1

Answer by M-Hanssen · Apr 22, 2016 at 10:10 AM

 navmeshAgent.Stop();
 navmeshAgent.ResetPath();

Should do the trick

Add comment · Show 2 · Share

techspy · Apr 22, 2016 at 12:15 PM 1

Share

Sir/ma'am you under estimate the deter$$anonymous$$ation of my enemy

Tabu · Oct 22, 2017 at 06:55 AM 0

Share

This did the trick for me - but without the navmeshAgent.Stop(); since this have been deprecated. Thanks

Answer 2

Answer by carlqwe · Apr 22, 2016 at 09:59 AM

If you want to stop the moving object when its for instance half way to its destination, then u can set the destination to the objects current position.

 MyNavMeshAgent.destination = gameObject.localPosition;

Or even easier set the target to the gameObjects local position

 target = gameObject.transform.localPosition;

Doesn't work? Check out this unity documentation

Add comment · Show 1 · Share

techspy · Apr 22, 2016 at 12:13 PM 0

Share

I tried transform.gameObject.transform.position. The enemy (yes he's become my enemy) just ignores me. But if I move the transform of the waypoint he responds. It's like i can't modify anything related to the NavmeshAgent at all. Setting the move Vector to zero just makes him jerk a bit then stop. The code is modified from the unity's examples

Answer 3

Answer by noGrip · Aug 30, 2021 at 08:28 AM

It has been some years since the last reply. But this works for me now:

 nav.velocity = Vector3.zero;
 nav.isStopped = true;

Add comment · Show 3 · Share

NordicMothCEO · Aug 31, 2021 at 12:50 PM 0

Share

It keeps complaining for me, whenever enemy gets in range and keeps on moving on, even though it should stop.

Here's my error: "Stop" can only be called on an active agent that has been placed on a NavMesh. UnityEngine.StackTraceUtility:ExtractStackTrace ()

Can you help with this, please?

noGrip NordicMothCEO · Aug 31, 2021 at 01:38 PM 0

Share

Don't know if I can help much, without seeing a code snippet. But the error description seems to indicate that your agent is not on the NavMesh.

I would check NavMesh.SamplePosition: [link text][1] [1]: https://docs.unity3d.com/ScriptReference/AI.NavMesh.SamplePosition.html

NordicMothCEO noGrip · Aug 31, 2021 at 02:55 PM 0

Share

I decided not to make it stop, but to try and approach the enemy if it gets in range. It works a lot better, than stopping would have, so I'm happy with it.

The lines that make it work basically are as follows:

     public void AttackEnemy()
     {
         if (Target == null)
         {
             Attack(false);
             Move();
         }
         else
         {
             float maxDistance = Vector3.Distance(transform.position, Target.transform.position);
             stance.LookAt(Target.transform);
 
             if (maxDistance < range)
             {
                 Attack(true);
                 Approach();
             }
             else
             {
                 Attack(false);
                 Move();
             }
         }
     }
 
     public void Attack(bool isActive)
     {
         var emissionModule = projectileParticles.emission;
         emissionModule.enabled = isActive;
     }
 
     public void Move()
     {
         NavMeshAgent agent = GetComponent<NavMeshAgent>();
         agent.SetDestination(goal.transform.position);
     }
 
     public void Approach()
     {
         NavMeshAgent agent = GetComponent<NavMeshAgent>();
         agent.SetDestination(Target.transform.position);
     }

Stop a Navmesh agent mid path

3 Replies

Your answer

Follow this Question

Related Questions