Camera movement script not working properly

Code (csharp):

1.  
2. {
3.     public Transform target;
4.  
5.     public float height = 7;
6.  
7.     public float radius = 7;
8.  
9.     public float angle = 0;
10.     public float rotationalSpeed = 1;
11.    
12.     void Update ()
13.     {
14.         float cameraX = target.position.x + (radius * Mathf.Cos(angle));
15.         float cameraY = target.position.y + height;
16.         float cameraZ = target.position.z + (radius * Mathf.Sin(angle));
17.  
18.         transform.position = new Vector3(cameraX, cameraY, cameraZ);
19.  
20.         if(Input.GetKey(KeyCode.A))
21.         {
22.             angle = angle - rotationalSpeed + Time.deltaTime;
23.         }
24.         else if(Input.GetKey(KeyCode.D))
25.         {
26.             angle = angle + rotationalSpeed + Time.deltaTime;
27.         }
28.  
29.         transform.LookAt(target.position);
30.     }
31. }
32.  

This is the script I am working with but there are a few small issues with it.

1.) For some reason if the rotate speed is set to 1 and I press the key to turn the camera it moves extremely fast and far, the transition is not smooth at all. In fact its only about as smooth as I want it if I set the speed down to 0.05 which doesn't seem right to me. Am I doing something wrong?

2.) when using the A key to rotate the camera it moves at one speed, but when I use the D key it moves at a much faster speed, about twice as fast or more. As far as I can tell this shouldn't happen but it is, no clue why.

3.) if I want to change the keys for A and D to the arrow keys, what code do I use?

Any help at all on these issues would be great! Thanks

 

You are adding the time, p=vt, multiplying should take care of 1 and 2. As for 3, in Visual Studio you can get a list of everything 'under the dot' by deleting the .A after KeyCode temporarily and pressing the period key. You should see a list of options popup.

 

I am assuming I am switching line:
angle = angle - rotationalSpeed +Time.deltaTime;

ah ok handy, did not know that. I knew it was something simple haha. Thanks a bunch!

 

Both worked like a charm! Thanks a ton!