Mathf.LerpAngle - rotate a block via input

I am trying to get a block to smooth rotate from one angle to another

All I seem to get at the moment it the block jumping into positions and not the smooth rotate I was hoping for ?

here is my code so far..

Code (csharp):

1. var current_angle = 0;
2. var desired_angle = 0;
3.  
4. function Update () {
5.  
6.  if (Input.GetKey ("up")) {
7.         desired_angle = 0;
8.     }
9.     else if (Input.GetKey ("right")) {
10.         desired_angle = 90;
11.     }
12.     else if (Input.GetKey ("down")) {
13.         desired_angle = 180;
14.     }
15.      else if (Input.GetKey ("left")) {
16.         desired_angle = 270;
17.      }
18.  
19. var angle = Mathf.LerpAngle(current_angle, desired_angle, Time.time);
20. transform.eulerAngles = Vector3(0, angle, 0);
21.  
22.  
23. }

 

Try using Time.deltaTime instead of Time.time?

EDIT: Also, it looks like current_angle is always zero, which means you will always be lerping from 0. I doubt this is what you want? Maybe try this:

Code (csharp):

1. var current_angle = 0;
2. var desired_angle = 0;
3.  
4. function Update () {
5.  
6.  if (Input.GetKey ("up")) {
7.         desired_angle = 0;
8.     }
9.     else if (Input.GetKey ("right")) {
10.         desired_angle = 90;
11.     }
12.     else if (Input.GetKey ("down")) {
13.         desired_angle = 180;
14.     }
15.      else if (Input.GetKey ("left")) {
16.         desired_angle = 270;
17.      }
18.  
19. current_angle = Mathf.LerpAngle(current_angle, desired_angle, Time.deltaTime);
20. transform.eulerAngles = Vector3(0, current_angle, 0);
21.  
22.  
23. }

 

nice - it now rotates but only when i press down and seems to only get to about 88 degrees before it stops , pressing up gets me back to 0 degrees and so does pressing left at that point .... thanks

 

Duh. That's what I get for not looking at the docs.

I tested this one and it works for me:

Code (csharp):

1. var desired_angle = 0;
2. var speed = 1.0;
3.  
4. function Update () {
5.  
6.  if (Input.GetKey ("up")) {
7.         desired_angle = 0;
8.     }
9.     else if (Input.GetKey ("right")) {
10.         desired_angle = 90;
11.     }
12.     else if (Input.GetKey ("down")) {
13.         desired_angle = 180;
14.     }
15.      else if (Input.GetKey ("left")) {
16.         desired_angle = 270;
17.      }
18.      
19.  var target_rotation = transform.rotation.Euler(0, desired_angle, 0);
20.  transform.rotation = Quaternion.Slerp( transform.rotation, target_rotation, Time.deltaTime * speed );
21. }

Sorry about that!

 

Thank you - someone mentioned slerp at some point, I was getting very confused - if I ever manage to put anything more polished together I will post it.

adam