Lag nearly game freeze after NavMeshAgent.Stop [Soved]

Unity Engine
1

I got a small script for removing my monster the problem is when i execute it the game go down to 1 frame per minute. After some tests i found the problem it is line 4. where i Stop the NavMeshAgent when i remove it there is no game freeze but i need the agent to stop.
NavMeshAgent .speed = 0 also lead to a freeze i realy dont know what goes wrong…

Code

        if(alive == false && remove == false)
        {
            this.transform.FindChild("Model").GetComponent<SkinnedMeshRenderer>().enabled = false;
            this.GetComponent<NavMeshAgent>().Stop();

            Main.gold  +=  10 * Main.wave + 1;
            remove         =  true;
            remove_time =  Time.time + 5;

            if(this.GetComponent<MonsterDebuffs>().poison == true)
                this.GetComponent<MonsterDebuffs>().EndPoison();
            if(this.GetComponent<MonsterDebuffs>().slowed == true)
                this.GetComponent<MonsterDebuffs>().EndSlow();
            if(this.GetComponent<MonsterDebuffs>().stunned == true)
                this.GetComponent<MonsterDebuffs>().EndStun();
        }
        if(remove == true && Time.time >= remove_time)
        {
            Destroy(gameObject);
        }
2

so if you comment out that line of code, the problem goes away?

3

After some more testing it seems like if i do a NavMeshAgent.stop lag is there for 100% when i remove it i have a chance that there is no lag and after some time the game go back to normal fps

Edit : Ok got it now it have to do with the Agent Size Radius every monster with a Agent Size that is to small cause that freeze…

looks like every thing smaller then 0.01 can cause a freeze at 0.001 it is a 100% freeze :slight_smile:

Edit2: This also removed the lag that some time came up when instantiating a Monster…

Destroy(gameObject) will also cause the freeze when the size is 0.001

4

those sizes are very small.

any reason for such small radius?

5

At the moment i am to lazy to port my old A* from java or to write a new one in c# thtas the main reason using navmesh and those small values gave me the best results when the monster moved through a maze…

6

well, if its giving you problem, you might need to look at increasing the size of your maze. Not sure there is a solution for managing it otherwise.

You could also manage all the movement code yourself. You can generate paths without an agent.

NavMesh.CalculatePath

7

Sounds nice with this i probly only need to calculate one path every x minutes

also they say
Returns
bool True if a either a complete or partial path is found and false otherwise.

is there a easy way to get true only on a complete path not partial ?

8

the path status should indicate if its full or partial

9

Thank you for the help will try to implement it for now it sounds very promising

Ok it work as needed here a small test
Code

        NavMesh.CalculatePath (this.transform.position, waypoints [0].transform.position, NavMesh.AllAreas, path);
        if (path.status == NavMeshPathStatus.PathInvalid)
        {
            Debug.Log ("no path");
        } else
            this.GetComponent<NavMeshAgent> ().SetPath (path);
10

Well got it working now more or less the problem is that when i place my tower to close to the first spawn/way point
the agent lose his path.

Situation 1 tower are placed far away he get his path and start moving

2207243--146677--path1.jpg
2207243--146677--path1.jpg1198×661 181 KB

Situation 2 tower are close to the spawn and first way point navmeshagent dont get his path or lose it i dont know

2207243--146678--path2.png
2207243--146678--path2.png1187×672 846 KB

I also played with diferent nav mesh sizes and other values but dont got any progress

Where i get the Path from
Code

public class PathFinding
{
    private NavMeshPath []     path;
    public  GameObject[]     way_points;
    public  GameObject         spawn;
    private bool             blocking = false;

    public PathFinding ( GameObject[]     way_points, GameObject spawn)
    {
        this.way_points = way_points;
        this.spawn = spawn;
        this.path = new NavMeshPath[way_points.Length];
    }

    public void DrawDebugLine()
    {
        for(int i = 0; i < path.Length - 1; i ++)
            for (int c = 0; c < path[i].corners.Length-1; c++)
                Debug.DrawLine(new Vector3(path[i].corners[c].x,1,path[i].corners[c].z), new Vector3(path[i].corners[c+1].x,1,path[i].corners[c+1].z), new Color(0.0f,0.0f,0.0f),10,false);       
    }

    public bool CalculatePath()
    {
        path = new NavMeshPath[way_points.Length];
        blocking = false;
        for (int i = 0; i < way_points.Length-1; i ++)
        {           
            path[i] = new NavMeshPath();

            NavMesh.CalculatePath (way_points [i].transform.position, way_points [i+1].transform.position, NavMesh.AllAreas, path[i]);

            if (path[i].status != NavMeshPathStatus.PathComplete)
            {
                blocking = true;
            }
        }
        return blocking;
    }

    public NavMeshPath GetPath(int index)
    {
        return path [index];
    }
}

where i give it to the navmesh
Code

    void Start()
    {
        this.GetComponent<NavMeshAgent>().SetPath(Main.path_finding.GetPath (way_point));
        // when tower are to close Distance is 0
        Debug.Log (this.GetComponent<NavMeshAgent>().remainingDistance);
        for (int c = 0; c < this.GetComponent<NavMeshAgent>().path.corners.Length-1; c++)
            Debug.DrawLine(new Vector3(this.GetComponent<NavMeshAgent>().path.corners[c].x,2,this.GetComponent<NavMeshAgent>().path.corners[c].z), new Vector3(this.GetComponent<NavMeshAgent>().path.corners[c+1].x,2,this.GetComponent<NavMeshAgent>().path.corners[c+1].z), new Color(0.5f,0.5f,1.0f),5,false);       
   
        alive = true;
    }
11

Ok agen a stupid mistake i got 3 overlaping navigation meshes (forgot to remove the static modifyer when dublicating some assets)
after removing 2 of them no more problems.

for now … :stuck_out_tongue: