360 degree plane rotation & texture change

Question

Hello all,

These forums have been really helpful, especially Robertbu,with a question I had about switching textures on an upright plane

The plane is rotating 360 degrees around the Y Axis and

The plane switches its texture depending in the angle

but the plane is following a character and only reading 0 to 180 degrees and then back down (even though it is rotating 360 as the player moves around ) ,

so the texture are only going halfway (180deg) and then back down.

here's the code:

 using UnityEngine;
 using System.Collections;
 
 public class LookAt3 : MonoBehaviour {
     
         
     public Transform player;
 
     public Texture[] textures;
 
     //public int numbersDevide360; 
 
         
         void Start() 
         {
         player = GameObject.FindGameObjectWithTag("Player").transform;
         }
         
 
 
         void Update() 
         {
     // Plane rotates to face the Player
             Vector3 v3 = player.position - transform.position;
             v3.y = 0.0f;
             transform.rotation = Quaternion.LookRotation(-v3);
 
         ChangeTexture();
         }
 
 
 
     void ChangeTexture()
     {
                 Vector3 dir = transform.position - player.position;
                 float angle = Mathf.Atan2 (dir.x, dir.z) * Mathf.Rad2Deg;
                 //int index = (int)angle / numbersDevide360;
                 int index = (int)angle /textures.Length;
                 GetComponent<Renderer> ().material.mainTexture = textures [index];
                 }
         }

Any ideas? Thanks in advance

Answer 1

Answer by robertbu · Nov 18, 2014 at 02:24 AM

Try this to normalize your angle to 0 to 360:

 float angle = Mathf.Atan2 (dir.x, dir.z) * Mathf.Rad2Deg;
 if (angle < 0.0f) {
      angle = 360.0 - angle;
 }

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Bentoon · Nov 18, 2014 at 04:49 AM 0

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Good thinking but I it's jumping all around now,

Angle is 2.2 & Index is 0 in one from and

Angle is 368 & Index 17 in the next

then it works for 7 images (<180 deg) before the Array index goes out of range. I really appreciate your help on this RB

~ be

Bentoon · Nov 18, 2014 at 05:01 AM 0

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Hey

I tried making the Index Absolute and it seems to have helped:

                 index = $$anonymous$$athf.Abs (index);
                 Debug.Log ("index = " + index);
             if (index <= textures.Length) {
                 GetComponent<Renderer> ().material.mainTexture = textures [index];
                 }

A L $$anonymous$$ O S T ... Thanks RB !

360 degree plane rotation & texture change

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