Angry Ant's Path following

Question

I have been trying to get a simple AI working with Angry Ant's path tool, I've followed the tutorial so I've got a path to follow but I cannot work out how to make the object follow the it. Is there a simple example project available so I can see it in action or could someone please tell me how access the path data?

P.s. I'm using c# if you want to post code.

Answer 1

Answer by IBDelta · Feb 22, 2011 at 02:29 PM

I finally got the answer to my own question. For those who wish to know, the two lines I was missing are as follows;

targWayFrom = m_CurrentPath.Segments[WayCnt].From as Waypoint;
targWayTo = m_CurrentPath.Segments[WayCnt].To as Waypoint;

They work from within the DemoSeeker script. WayCnt is the current connection you are accessing, the first position the object moves to is Segments[0].From

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Ganesh Faterpekar · Apr 04, 2011 at 12:48 PM 0

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Hi I am trying the same, can you post the full example of moving an object along the path in Angry Ant's path

thanks in advance

Answer 2

This was the script I got working. It's designed to use the Mixamo zombie character. I had to edit the zombie controller to accept script driven stimulus instead of a keystroke. I'll be doing a tutorial on how to make path and behave work together and I'll post a link here if I can. I don't do a lot of coding in summer so it will have to wait a bit.

using UnityEngine; using System.Collections;

[RequireComponent (typeof (Navigator))] public class DemoSeeker : MonoBehaviour { public Transform m_Target;

 public Path m_CurrentPath;

 public float speed = 3.0F;
 public float rotateSpeed = 3.0F;
 public float ZombieRotate = 0.0F;
 public float targetDir=0.0f;    
 public Vector3 targVect=Vector3.zero;   
 public int PathCnt;
 public int WayCnt;
 public int NodeCnt;
 public Connection[] WaypointObj; 
 public int WaypointCnt;
 public int WayPathCnt;
 public Connection targObj;
 public Waypoint targWayFrom;
 public Waypoint targWayTo;
 public float WayDist;
 public bool ZombieMove=false;
 public static bool ZomFwd=false;
 public static bool ZomLft=false;
 public static bool ZomRgt=false;
 public static Vector3 RelativePos;
 public int TurnCnt=0;

 void Start ()
 {
     m_Target=GameObject.FindWithTag("Player").transform;
     GetComponent&lt;Navigator&gt; ().RegisterWeightHandler ("Water", OnHandleWaterWeight);
     GetComponent&lt;Navigator&gt;().targetPosition=m_Target.position;
     GetComponent&lt;Navigator&gt;().ReSeek();
     PathCnt=0;
     WayCnt=0;
     NodeCnt=0;
     TurnCnt=0;
 }

     // Update is called once per frame
 void Update () 
 {
     PathCnt++;
     if(PathCnt==5)
     {
         targWayFrom = m_CurrentPath.Segments[WayCnt].From as Waypoint;
         targWayTo = m_CurrentPath.Segments[WayCnt].To as Waypoint;
         ZombieMove=true;
         PathCnt=0;
         if ((transform.position.x&lt;targWayFrom.Position.x+2)&amp;&amp;(transform.position.x&gt;targWayFrom.Position.x-2)&amp;&amp;(transform.position.z&lt;targWayFrom.Position.z+2)&amp;&amp;(transform.position.z&gt;targWayFrom.Position.z-2))
         {
             WayCnt++;
         }
     }
     if(ZombieMove==true)
     {
         ZomRgt=false;
         ZomLft=false;

         TurnCnt++;
         ZomFwd=true;
         if(TurnCnt==5)
         {
             TurnCnt=0;
             RelativePos=transform.InverseTransformPoint(targWayFrom.Position);
             if (RelativePos.x &gt; 0) 
             {
                 ZomRgt=true;
                 ZomLft=false;
             }
             if (RelativePos.x &lt; 0) 
             {
                 ZomRgt=false;
                 ZomLft=true;
             }
         }
     }
 }


 void OnNewPath (Path path)
 // When pathfinding via Navigator.targetPosition
 {
     Debug.Log ("Received new Path from " + path.StartNode + " to " + path.EndNode + ". Took " + path.SeekTime + " seconds.");
     m_CurrentPath = path;
 }


 void OnTargetUnreachable ()
 // When pathfinding via Navigator.targetPosition
 {
     Debug.Log ("Could not pathfind to target position");
     m_CurrentPath = null;
 }


 void OnPathAvailable (Path path)
 // When pathfinding via Navigator.RequestPath (startPositio, endPosition)
 {
     Debug.Log ("Requested Path from " + path.StartNode + " to " + path.EndNode + " is now available. Took " + path.SeekTime + " seconds.");
 }


 void OnPathUnavailable ()
 // When pathfinding via Navigator.RequestPath (startPositio, endPosition)
 {
     Debug.Log ("The requested path could not be established.");
 }


 void OnPathInvalidated (Path path)
 // When a path requested by a Navigator on this GameObject is no longer valid - due to a connection or node disabling or removal
 {
     Debug.Log ("The path from " + path.StartNode + " to " + path.EndNode + " is no longer valid.");
 }


 void OnGUI ()
 {
     if (GUILayout.Button ("Pathfind"))
     {
         GetComponent&lt;Navigator&gt; ().targetPosition = m_Target.position;
     }
     if (GUILayout.Button ("ReSeek"))
     {
         GetComponent&lt;Navigator&gt; ().ReSeek ();
     }
 }


 void OnDrawGizmos ()
 {
     if (m_CurrentPath == null)
     {
         return;
     }

     m_CurrentPath.OnDrawGizmos ();
 }


 float OnHandleWaterWeight (object obj)
 {
     return 3.0f;
 }

}

P.s. Mr Ant, if you happen to read this, your path system is smarter than my dog. She managed to get herself stuck in a tennis court with an open gate this morning :-)

Angry Ant's Path following

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