limit Quaternion.Euler rotation

Question

hey! so i got this piece of code when a button gets hold down:

 maze.transform.rotation *= Quaternion.Euler(0,0,40*Time.deltaTime);

with this script snippet a plane is rotating smoothly all the time. but i want to let it stop at lets say 20° even if my button is still gets hold down. how can i do this? thanks!

Answer 1

Best Answer

Answer by akh32 · Dec 11, 2015 at 01:56 PM

I would start by storing your result in a temporary variable, then testing the z-rotation, like so:

 Quaternion t = maze.transform.rotation * Quaternion.Euler(0,0,40*Time.deltaTime);
 
 if(t.euler.z > 20){
 t = Quaternion.Euler(t.euler.x, t.euler.y, 20);
 }
 
 maze.transform.rotation = t;

This assumes that you want a global limit of 20° rotation, and not that you want the maximum amount of rotation provided by this button to be 20°.

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Answer 2

Answer by mr_duke · Dec 10, 2015 at 05:23 PM

mby

 maze.transform.rotation = Quaternion.RotateTowards(maze.transform.rotation, Quaternion.Euler(0,0,40), Time.deltaTime);

help

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Der_Kevin · Dec 10, 2015 at 05:51 PM 0

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thanks. but that also let the plane rotate infinite this is the whole code if that helps:

 void Update() {
 
 
         if (Input.Get$$anonymous$$ouseButton(0)) {
             RaycastHit hit;
             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             
             if (Physics.Raycast(ray, out hit, 100)) {
                 // whatever tag you are looking for on your game object
                 if(hit.collider.tag == tag) { 
                     maze.transform.rotation *= Quaternion.Euler(yrotation*Time.deltaTime,0,xrotation*Time.deltaTime);
 
                     Debug.Log("---> Hit: ");
                     
                 }
             }
             
             
         }

mr_duke · Dec 10, 2015 at 07:23 PM 0

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 private const float STOP_ANGLE = 20;
 private const float SPEED_ANGLE = 180;//per second
 public  GameObject maze;
 
 private float mazeYangle = 360;//curren angle
 RaycastHit hit;
 
 private void Update()
 {
     if ( Input.Get$$anonymous$$ouseButton( 0 ) && Physics.Raycast( Camera.main.ScreenPointToRay( Input.mousePosition ), out hit, 100 ) )
     {
         var oldAngle = mazeYangle;
         mazeYangle = ( mazeYangle + SPEED_ANGLE * Time.deltaTime - STOP_ANGLE ) % 360 + STOP_ANGLE;
         maze.transform.Rotate( 0, mazeYangle - oldAngle , 0 ) ;
     } else
     {
         var oldAngle = mazeYangle;
         mazeYangle = $$anonymous$$athf.$$anonymous$$in( mazeYangle + SPEED_ANGLE * Time.deltaTime - STOP_ANGLE, 360 ) + STOP_ANGLE;
         maze.transform.Rotate( 0, mazeYangle - oldAngle, 0  );
     }
 }

limit Quaternion.Euler rotation

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