How will i make my objects/model(say a car) face the way points and travel towards it,instead of blindly following it?

Question

i'm a newbie and i'm trying out some stuff with a few models. I have a car model and when i was trying to use waypoints to make it follow throught those points ,my car isn't facing towards it . Instead it is trying to just move towards the waypoint no matter what side it is turned .

I want the car's front side to be facing towards the waypoint it is trying to reach.

Answer 1

Best Answer

Answer by save · Aug 01, 2013 at 12:26 PM

To get a direction from two positions the basic calculation is like this:

 target.position - transform.position

To set a new look rotation from a direction over time (with linear interpolation):

 var rotationSpeed : float = 10.0;
 var direction : Vector3 = Vector3(target.position - transform.position);
 var newLookRotation : Quaternion = Quaternion.LookRotation(direction);

 transform.rotation = Quaternion.Slerp(transform.rotation, newLookRotation, rotationSpeed*Time.deltaTime);

There's also a function called RotateTowards which can be useful. If you don't want to rotate over time and just set the rotation immediately, you can use LookAt.

 transform.LookAt(target);

So what you basically have to do is to assign each next waypoint as your target when you've finished the current. As you haven't posted any script, an example:

 var allWayPoints = Transform[];
 var currentWayPoint : int;
 var target : Transform;

 // Called when reaching current waypoint
 function FinishedWaypoint () {
     // Increase currentWayPoint by one and make it loop if exceeds length of all waypoints
     currentWayPoint++; currentWayPoint = currentWayPoint%allWayPoints.Length;

     // Set next waypoint as new target (to later rotate towards it)
     target = allWayPoints[currentWayPoint];
 }

On another note, I saw you had duplicate posts in the moderation queue. There might be a little bit of delay of the publication of your questions as you have to wait for approval from a moderator - just so you don't think that your question got lost.

1 Show 3 · Share

rangapraveen · Aug 01, 2013 at 12:33 PM 0

Share

thanx a lot , will give it a try ! :)

rangapraveen · Aug 01, 2013 at 02:04 PM 0

Share

thanks for ur help

 using UnityEngine;
 using System.Collections;
 
 public class waypoint : MonoBehaviour {
     
     public Transform[] waaypoint;
     public int speed=50;
     private int currentwaypoint;
     public Vector3 velocity;
     
     // Use this for initialization
     void Start () {
         //Debug.Log(currentwaypoint);
     
     }
     
     // Update is called once per frame
     void Update () {
         //Debug.Log(currentwaypoint);
         if(currentwaypoint< waaypoint.Length)
         {
              Vector3 target= waaypoint[currentwaypoint].position;
             Vector3 movedirection=target-transform.position;
          velocity=rigidbody.velocity;
             
             if(movedirection.magnitude<1)
             {
                 currentwaypoint++;
             }
             else
             {
                 velocity=movedirection.normalized*speed;
             }
                 
         }
         rigidbody.velocity= velocity;
             transform.LookAt(waaypoint[currentwaypoint].position);
         if(currentwaypoint == waaypoint.Length)
         {
             // ??
         }
     }
 }

this is the code that i used ....it works fine but my car still continues to move even after reaching the last waypoint.

moreover, i hav a simple terrain with small mountains , the car just after a few elevated movement moves through the mountain to the last waypoint.

how do i solve this ?

Hamilcar-games · Sep 12, 2017 at 10:15 AM 0

Share

thank you so much forr this

Answer 2

Answer by Hamilcar-games · Sep 12, 2017 at 10:21 AM

who likes the c# from the answer code this is the code :

             Vector3 direction = targetPosition - transform.position;

             Quaternion newlook_rotation = Quaternion.LookRotation(direction);

             transform.rotation = Quaternion.Slerp(transform.rotation, newlook_rotation, rotation_speed * Time.deltaTime);

0 · Share

How will i make my objects/model(say a car) face the way points and travel towards it,instead of blindly following it?

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions