Constantly rotate a gameobject around y axis.

Question

I want to keep rotating a gameobject throughout the scene, Currently what code i am using is..

   void Update () {
     //rotate the current item
     items[currentItem].transform.Rotate(0,1,0);
     }

However, I think this is not efficient as update gets called in between the object is rotating so there is a huge buffer of rotation building up and the object keeps on rotating even when the gameobject (items[currentItem]) changes. How can i inexpensively keep rotating a object and make it stop as soon as it is not getting any more rotation commands.

Answer 1

this is perfectly, flawlessly, amazingly efficient
note that it is extremely unlikely you want to rotate it by "1" every frame (frames happen up to 100s of times per second)
it is very likely you want to do something like .Rotate( 0, Time.deltaTime, 0)
you can find endless examples on here about the details of this, eg

http://answers.unity3d.com/questions/52790/constant-rotation-to-an-object.html

search in google on "answers.unity3d.com Rotation Time.deltaTime" to find literally 100s of such answers.

more tricky ...

http://answers.unity3d.com/questions/14527/rotate-90-over-time-on-mousedown.html

there is no "buffer" whatsoever
when you change "currentItem", it will instantly stop rotating the previous "currentItem" and begin rotating the new "currentItem". If it does not: you have made a mistake somewhere else. To solve that problem, add a debug line, Debug.Log .. etc
regarding the question of "how to do this only when a button is being held down"

Essentilally, you add code like this:

 function Update()
     {
     if the button is being held down then
          items[currentItem].transform.Rotate(0,1,0);
     }

regarding how to detect if a button is being held down, search on here for 1000s of answers

or glance at the doco

http://docs.unity3d.com/Documentation/ScriptReference/Input.html

http://docs.unity3d.com/Documentation/ScriptReference/Input.GetButton.html

Hope it helps !!!

Constantly rotate a gameobject around y axis.

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