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Question by GwnKeon · Jul 09, 2017 at 11:08 AM · c#unity 52dcar gameracing game

AI car doesn't work?

I have made this code so that the car is going to follow the path, but the car doesn't follow the Path and continues just straight.`using System.Collections; using System.Collections.Generic; using UnityEngine;

public class Path : MonoBehaviour { public Color lineColor; public Color color = Color.white;

 private List<Transform> Nodes = new List<Transform>();

 void OnDrawGizmosSelected()
 {
     
     Gizmos.color = lineColor;

     Transform[] pathTransform = GetComponentsInChildren<Transform>();
     Nodes = new List<Transform>();

     for (int i = 0; i < pathTransform.Length; i++)
     {
         if (pathTransform[i] != transform)
         {
             Nodes.Add(pathTransform[i]);
         }
     }

     for (int i = 0; i < Nodes.Count; i++)
     {
         Vector3 currentNode = Nodes[i].position;
         Vector3 previousNode = Vector3.zero;

         if (i > 0)
         {
             previousNode = Nodes[i - 1].position;
         }
         else if (i == 0 && Nodes.Count > 1)
         {
             previousNode = Nodes[Nodes.Count - 1].position;
         }

         Gizmos.color = Color.white;
         Gizmos.DrawLine(previousNode, currentNode);
         Gizmos.DrawWireSphere(currentNode, 0.2f);
     }
 }



}
` that is the script for the Path

and this is the script for the AI car

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class SteeringByItself : MonoBehaviour {
 
     public Transform path;
     public float maxSteerAngle = 180f;
     public float speedForce = 2f;        
 
     private List<Transform> Nodes;
     private int currentNode = 0;
 
     // Use this for initialization
     void Start () {
         Transform[] pathTransform = path.GetComponentsInChildren<Transform>();
         Nodes = new List<Transform>();
 
         for (int i = 0; i < pathTransform.Length; i++)
         {
             if (pathTransform[i] != path.transform)
             {
                 Nodes.Add(pathTransform[i]);
             }
         }
 
     }
 
     private void FixedUpdate()
     {
         ApplySteer();
         Drive();
         CheckWayPointDistance();
     }
 
    
     private void ApplySteer ()
     {
         Rigidbody2D rb = GetComponent<Rigidbody2D>();
 
         Vector3 relativeVector = transform.TransformPoint(Nodes[currentNode].position);
         float newSteer = (relativeVector.x / relativeVector.magnitude) * maxSteerAngle;
         rb.angularVelocity = newSteer;
 
 
     }
 
     private void Drive()
     {
         Rigidbody2D rb = GetComponent<Rigidbody2D>();
 
         rb.AddForce(transform.up * speedForce);
 
 
     }
 
     private void CheckWayPointDistance()
     {
         if(Vector3.Distance(transform.position, Nodes[currentNode].position) < 0.5f)
 
         {
             if(currentNode == Nodes.Count -1)
                 {
                 currentNode = 0;
                 }
             else
             {
                 currentNode++;
             }
         }
     }
 }
 

What I'm doing wrong?

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Answer by Maunda · Jul 09, 2017 at 01:03 PM

I Think You Forgot To Use Navigation

Bake Your Scene With Navmesh Its in your windows>Navigation

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avatar image Maunda · Jul 09, 2017 at 01:07 PM 0
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And There's Nothing Wrong With Your Script, The Only Thing You Have To Do Is Bake Your Scene In Navigation Cause AI Need Navmesh To Walk On To $$anonymous$$AYBE ? :/

avatar image GwnKeon · Jul 09, 2017 at 02:42 PM 0
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I did what you sad but it doesn't work. Is this script also good for a 2D race game? and thank you for responding :)

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