Problem With RayCast

Question

So I'm trying to have a raycast fire at the nearest target and return the object's that was hit name. I added Debug.Draw to see if it was the raycast and as far as I see the raycast doesn't do anything, not sure what I did wrong; please help.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class GrappleHook : MonoBehaviour
 {
     public RaycastHit HitInfo;
 
     private GameObject GetClosestTarget(string targetTag)
     {
         GameObject closestTarget = null;
         float closestDistance = 3.0F;
         foreach (GameObject target in GameObject.FindGameObjectsWithTag(targetTag))
         {
             float dist = Vector3.Distance(transform.position, target.transform.position);
             if (dist < closestDistance)
             {
                 closestTarget = target;
                 closestDistance = dist;
             }
         }
         return closestTarget;
     }
 
     private void Update()
     {
         GameObject ClosestTarget = GetClosestTarget("Enemy");
 
         transform.LookAt(ClosestTarget.transform);
 
         if(Physics.Raycast(transform.position, transform.forward, out HitInfo))
         {
             print(HitInfo.collider.gameObject.name);
             Debug.DrawLine(Vector2.zero, HitInfo.point); //Doesn't Draw Anything
         }
 
     }
 }

Answer 1

Best Answer

Answer by Vega4Life · Dec 18, 2018 at 12:29 AM

If you want to see where the raycast is visually, debug outside the raycast

 Debug.DrawLine(transform.position, transform.forward, Color.red);
 if(Physics.Raycast(transform.position, transform.forward, out HitInfo))
          {
              print(HitInfo.collider.gameObject.name);
          }

This will draw a red line from your character to 1meter forward - which is the exact length and direction of your raycast.

Add comment · Show 5 · Share

Golden_Gamer · Dec 18, 2018 at 08:58 PM 0

Share

Thx you, but it still doesn't do anything. I moved Debug.DrawLine like you said, but it still has no effect.

Vega4Life Golden_Gamer · Dec 18, 2018 at 09:46 PM 0

Share

It doesn't draw in game view, only the scene view.

Vega4Life Vega4Life · Dec 18, 2018 at 09:48 PM 0

Share

You should also probably make it longer because the transform gizmo arrows are 1meter. So do this

 Debug.DrawLine(transform.position, transform.forward * 5f, Color.red);

Golden_Gamer · Dec 19, 2018 at 06:08 PM 0

Share

THX U, IT WOR$$anonymous$$S NOW. I don't know how, but I deleted all my code and rewrote it and it worked now (with that change of course).

Vega4Life Golden_Gamer · Dec 19, 2018 at 06:11 PM 0

Share

Sure. Good luck!

Answer 2

Answer by Cornelis-de-Jager · Dec 18, 2018 at 09:09 PM

I think it is drawing but just too short to see because you added no distance. Maybe.

Try the code below:

 private void Update()
     {
         GameObject ClosestTarget = GetClosestTarget("Enemy");
  
         transform.LookAt(ClosestTarget.transform);
         
         Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * 2, Color.white);
 
         if(Physics.Raycast(transform.position, transform.forward, out HitInfo))
         {
             Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * 1000, Color.Red);
         }
  
     }
 }

Add comment · Share

Answer 3

Answer by Golden_Gamer · Dec 18, 2018 at 11:50 PM

Oh it's only in the scene view, size isn't a problem; it went as far as I could see, but now I know the raycast is what is wrong with the code, it wont follow the closest target like I want. Thank You For The Help.

Add comment · Share

Problem With RayCast

3 Replies

Your answer

Follow this Question

Related Questions