how to check if the target is to the left or the right?

Question

i have this code, which checks for if the target is behind or in front, but was wondering how can i check if it is to the left or the right of me ( i need it so i can play a certain animation).

 Vector3 dir = (target.transform.position - transform.position).normalized;
     float direction = Vector3.Dot (dir, transform.forward);
 if (direction < 0.3f) {// stuff here
 }

Answer 1

Best Answer

Answer by Mortoc · May 07, 2012 at 11:51 PM

Get the Dot product of the transform.right vector and the direction vector. Same deal, negative value is to the left and positive is to the right.

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Answer 2

Answer by Seyed_Morteza_Kamaly · Jun 10, 2017 at 07:26 PM

     using System.Collections;
     using UnityEngine;
     
     public class NewBehaviourScript : MonoBehaviour {
         public Transform target;
         private Vector2 mypos;
         
     void Start () {
         mypos = transform.position;
         var targetPos = target.position;
         if (target.position.x < mypos.x && changed(mypos.y,targetPos.y)) {
             print ("Right");
         } else if(changed(mypos.y,targetPos.y)){
             print ("Left");
         }
 
 
         if(target.position.y < mypos.y && changed(mypos.x,targetPos.x)){
             print("Up");
         }else if(changed(mypos.x,targetPos.x)){
             print("Down");
         }
     }
 
 
     bool changed(float a,float b){
         if((int)a == (int)b){
             return true;
         }else{
             return false;
         }
     }
 }

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Answer 3

Answer by italoha · Jul 18, 2019 at 03:08 AM

 if(Vector3.Dot(transform.right, transform.position) > 0) {
     //Is moving right
 } else {
     //Is moving left
 }

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how to check if the target is to the left or the right?

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