How to Rotate Game Object in specific Angle repeatedly on Key Press?

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Ok, so I am trying to rotate an Equilateral Triangle in Y-Axis. So basically I want this Triangle to rotate +120 degrees everytime I press the key "W" and -120 degrees every time I press the Key "S".

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Answer by Casy10 · Sep 08, 2017 at 08:35 AM

Hello @manikiran22 ! Hope this helps you :

 using UnityEngine;
 
 public class FixedAngleRotator : MonoBehaviour
 {
     public float XAngle;
     public float YAngle;
     public float ZAngle;
 
     private void Update()
     {
         if (Input.GetKeyDown(KeyCode.W))
             transform.Rotate(XAngle, YAngle, ZAngle);
         if (Input.GetKeyDown(KeyCode.S))
             transform.Rotate(-XAngle, -YAngle, -ZAngle);
     }
 }

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manikiran22 · Sep 09, 2017 at 04:54 PM 0

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Man thanks @Casy10 a ton it is rotating as I wanted it to :) , one thing i want to implement is the triangle is rotating fine but is there a way to see its rotation smoothly like i want the user to see the triangle rotate +120 or -120 degrees. thanks again :)

Litleck manikiran22 · Sep 09, 2017 at 05:50 PM 0

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I may be able to help, what do you mean by wanting the user to see it rotate +120 or -120 degrees? Do you want it to instantly turn that much or slowly rotate until it has turned 120 degrees?

CraigGraff · Sep 10, 2017 at 03:20 AM 0

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@manikiran22 This will do what you want nicely, I think.

 using UnityEngine;
 using System.Collections;
 
 public class FixedAngleRotator : MonoBehaviour
 {
     public Vector3 EulerRotation = new Vector3(0f, 120f, 0f);
     public float TimeToRotate = .5f;
 
     private bool rotating;
 
     private void Update()
     {
         if (!rotating)
         {
             if (Input.GetKeyDown(KeyCode.W))
             {
                 StartCoroutine(doRotate(EulerRotation));
             }
             else if (Input.GetKeyDown(KeyCode.S))
             {
                 StartCoroutine(doRotate(-EulerRotation));
             }
         }
     }
 
     private IEnumerator doRotate(Vector3 rotation)
     {
         Quaternion start = transform.rotation;
         Quaternion destination = start * Quaternion.Euler(rotation);
         float startTime = Time.time;
         float percentComplete = 0f;
         rotating = true;
         while(percentComplete <= 1.0f)
         {
             percentComplete = (Time.time - startTime) / TimeToRotate;            
             transform.rotation = Quaternion.Slerp(start, destination, percentComplete);
             yield return null;
         }
         rotating = false;
     }
 
 }

mahmoud_mousa CraigGraff · Apr 25, 2019 at 12:48 PM 0

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I don`t understand why you multiply the two Quaternion Quaternion destination = start * Quaternion.Euler(rotation); It`s working prefect without this multiplication.

ATLGAN CraigGraff · Jul 23, 2020 at 11:08 AM 0

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But what is mean that? percentComplete = (Time.time - startTime) / TimeToRotate;

How to Rotate Game Object in specific Angle repeatedly on Key Press?

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