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Question by najikadri · Mar 19, 2016 at 08:51 AM · directionvectoranglesreflections

Get Direction of a vector

I have a 2D object which is a bullet that I want to reflect when it hits a normal. To reflect the direction of the ray I used Vector3.reflect. The weird thing is I logged both vectors the original and the reflected one and they have the same values but different directions as drawn in the debug. How can I get the direction of the reflect vector rather than the same of the original direction.

here is the code along with a picture:

 using UnityEngine;
 using System.Collections;
 
 public class BulletBehavior2D : MonoBehaviour {
     public bool isEnabled;
     public float speed;
     public bool bounceOff;
     public float rayLength;
     private Ray2D ray;
     private RaycastHit2D hit;
 
     // Use this for initialization
     void Start () {
 
     }
     
     // Update is called once per frame
     void Update () {
 
         ray = new Ray2D (new Vector2 (transform.position.x, transform.position.y), new Vector2 (transform.right.x, transform.right.y));
         RaycastHit2D hit;
         Debug.DrawRay (ray.origin, ray.direction * rayLength);
         hit = Physics2D.Raycast (ray.origin, ray.direction, rayLength);
 
         if (isEnabled) {
             transform.position += transform.right *  Time.deltaTime * speed;
         }
         if (hit != null) {
             Debug.DrawRay (hit.point, hit.normal * rayLength,Color.red);
             Vector3 reflect = BulletBehavior2D.Reflect(transform.right,hit.normal);
             Debug.DrawRay (hit.point, reflect * rayLength ,Color.blue);
             Debug.DrawRay (hit.point, transform.right * rayLength ,Color.blue);
         }
 
 
     }
 
     public static Vector3 Reflect(Vector3 vector, Vector3 normal)
     {
         return 2.0f * (normal * -Vector3.Dot(vector, normal)) + vector;
     }
 
     void OnTriggerEnter2D(Collider2D coll) {
 
         Vector3 reflect = BulletBehavior2D.Reflect (transform.right, hit.normal);
 
     
 
    }
 }
 

alt text

samevectordifferentdirection.png (29.3 kB)
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