Question Local rotate and stop at new position?

Hi

Playing with rotating blades on a wind turbine..


I am trying to pitch the blades to a angle,
Initially i was using

Code (csharp):

1. BladeC.GetComponent<Transform>().localRotation = Quaternion.Slerp(Quaternion.Euler(240, 0, 0), Quaternion.Euler(0, NewAngle, 0), 0.1f * Time.deltaTime);

But that is not a "local" transform, and caused rotation on unwanted sides..

I only wish to rotate around it self, and i do that with

NewAngle is a int giving the new pitch angle.

Code (csharp):

1.  
2.  
3.         BladeA.GetComponent<Transform>().localEulerAngles += new Vector3(0f, NewAngle, 0f) * 0.5f * Time.deltaTime;
4.         BladeB.GetComponent<Transform>().localEulerAngles += new Vector3(0f, NewAngle, 0f) * 0.5f * Time.deltaTime;
5.         BladeC.GetComponent<Transform>().localEulerAngles += new Vector3(0f, NewAngle, 0f) * 0.5f * Time.deltaTime;
6.  

However, ofcourse it keeps spinning around itself, but atleast on the correct axis.

Any suggestions on how i can achieve this, and make it stop at it's desired angle?

 

First you shouldn't use GetComponent in Update. It's eating up too much resources and bad practice. Get it once and store it.
About your Question: You should have a look at Lerp.
My Approach would be somethin like this:

Code (CSharp):

1.  
2. float elapsedTime = 0f;
3. float startVal = 0f;
4. float goalVal = 10f;
5.  
6. void Update()
7. {
8.  if(elapsedTime < 1f)
9.  {
10.    elapsedTime += Time.deltaTime;
11.    elapsedTime = Mathf.Clamp(elapsedTime, 0f, 1f);//not necessarily needed, but hey...
12.    myCachedTransform.localEulerAngles = new Vector3(0f, Mathf.Lerp(startVal, goalVal, elapsedTime), 0f);
13.  }
14. }
15.  
16. //This might be a neat extension..
17. void SetNewRotation(float rotation)
18. {
19.   elapsedTime = 0f;
20.   goalVal = rotation;
21.   startVal = myCachedTransform.localEulerAngles.y
22. }
23.  

What's happening here: We keep track of the elapsed Time and use that value (kept between 0 and 1) to Linear interpolate between a start and a goal value.

 

Thanks for the tip..
Then i can reply, first of all i am not using Getcomponent in update.. But i call the function when a bool is true.
In this case,

If pitch is true, then run the function once.
in the function the pitch is set back to false, So it's only called once

 

Perfect. Just wanted to make sure. Let me know how the rest goes.