How do I convert this script to CSharp?

I have a code that takes a certain Javascript script and lerps a certain variable in it. This is the code...

Code (JavaScript):

1. var aim : float = 20;          //determines amount of zoom capable. Larger number means further zoomed in
2. var normal : float = 60;        //determines the default view of the camera when not zoomed in
3. var smooth : float = 5;          //smooth determines speed of transition between zoomed in and default state
4. var script : HeadBob;
5. script = gameObject.GetComponent( HeadBob );
6.    
7. private var zoomedIn = false; //boolean that determines whether we are in zoomed in state or not
8.  
9. //This function toggles zoom capabilities with the Z key. If it's zoomed in, it will zoom out
10. function Update()
11. {
12.         zoomedIn = false;
13.     if (Input.GetButton("Fire2"))
14.     {  
15.         zoomedIn = true;
16.     }
17.    
18.     //If "zoomedIn" is true, then it will not zoom in, but if it's false (not zoomed in) then it will zoom in.  
19.     if( zoomedIn == true )
20.     {
21.     script.bobbingSpeed = Mathf.Lerp(script.bobbingSpeed, aim, Time.deltaTime*smooth );
22.     }
23.     else
24.     {
25.     script.bobbingSpeed = Mathf.Lerp(script.bobbingSpeed, normal, Time.deltaTime*smooth );
26.     }
27. }
28.  

But the thing is, it won't let me change variables in CSharp scripts unless THIS code is in CSharp, but the problem with that is, I'm really bad at CSharp. Could someone help me convert this code to CSharp? If so, thanks!

 

Have you made an attempt yet?

 

Like I said, I'm near illiterate in CSharp

 

Then learn and take some tutorials! For a script this simple, I doubt it would take you longer than an hour or two.

 

Well, I'm drunk and bored on transit, so I typed it into my phone.

Absorb this into your brain:

Code (CSharp):

1. using UnityEngine;
2.  
3. public class BobHelper : MonoBehaviour {
4.     [SerializeField] float aim = 20f;
5.     [SerializeField] float normal = 20f;
6.     [SerializeField] float smooth = 5f;
7.  
8.     HeadBob headBob;
9.  
10.     void Awake()
11.     {
12.         headBob = GetComponent<HeadBob>();
13.     }
14.  
15.     void Update()
16.     {
17.          bool firing = Input.GetButton("Fire2");
18.  
19.          headBob.bobbingSpeed = Mathf.Lerp(headBob.bobbingSpeed, firing ? aim : normal, Time.deltaTime * smooth);
20.  
21.     }
22.  
23. }
24.  
25.  

 

This. You can look each function up in the API and find examples in both C# and JavaScript.

Key differences

• Variables are typed differently

Code (CSharp):

1. // JavaScript
2. var myInt : int;
3.  
4. // C#
5. int myInt;

• Generics are different

Code (CSharp):

1. // JavaScript
2. GetComponent(MyClass);
3.  
4. // C#
5. GetComponent<MyClass>();

• Functions return values are different

Code (CSharp):

1. // JavaScript
2. function MyMethod (){}
3.  
4. // C#
5. void MyMethod (){}

That should cover it. There are some other differences, but they don't matter in this script.

 

Here's a mini-tutorial...

When you create a new C# script it will look something like this:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class YourScriptName : MonoBehaviour {
5.  
6.     // put the variables up here
7.  
8.     void Start() {
9.     }
10.  
11.     void Update() {
12.     }
13.  
14.  
15. }

I included a line that shows where you'll put the variables -- you won't see that comment in your newly created script.

In C# the variable declarations follow this format (in general):

Code (CSharp):

1. public|private variableType nameOfVariable [= defaultValue];

Which means the first line of code:

Code (Javascript):

1. var aim : float=20;

...turns into this:

Code (CSharp):

1. public float aim = 20;

(I *think* vars in Javascript are public by default, but if not you can ditch the public from the beginning of that line.)

Now change the other variable declarations the same way.

Line 5 in your code needs to be put into the Start() function and possibly tweaked a little. As a beginner in Unity I don't know all the ways something can be done, but I'd put that line of code in the function, like this:

Code (CSharp):

1. void Start()
2. {
3.    script = gameObject.GetComponent<HeadBob>();
4. }

Notice that I changed the format of that line of code a little bit to the way I generally do it.

In line 10 of your code it shows that Javascript functions start with the function keyword, but that's not the case in C#, so you'll need to copy the lines of code from that function (lines 11 through 26) into the Update() function in your C# script.

Most of those lines of code stay the same, but the two calls to Mathf.Lerp need to go inside a call to create a new Vector3, so instead of looking like this:

Code (CSharp):

1. Mathf.Lerp(script.bobbingSpeed, aim, Time.deltaTime*smooth )

...it will look like this:

Code (CSharp):

1. new Vector3( Mathf.Lerp(script.bobbingSpeed, aim, Time.deltaTime*smooth ) )

Note that I only showed partial changes -- there are two lines where you'll have to add the new Vector3() around the Mathf.Lerp parts of the lines.

Try making those changes and see what happens. (If I screwed something up I'm pretty sure someone will come along and straighten me out).

Jay

 

Crap, I type so freaking slow there are three posts before mine is done. Including one from a drunk guy on a phone! Bah!

 

Okay, cool, this really helped, but I got a parsing error on the very last line. How do I fix it (P.S. What's a parsing error)?

 

sorry, forgot to add the script...

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class GunAimY : MonoBehaviour {
5.     public float aim = 0.0;
6.     public float normal = 0.0;
7.     public float smooh = 5;
8.     public GunSway script;
9.  
10.     // Use this for initialization
11.     void Start ()
12.     {
13.         script = gameObject.GetComponent<HeadBob>();  
14.     }
15.    
16.     // Update is called once per frame
17.     void Update ()
18. {
19.  
20.         zoomedIn = false;
21.     if (Input.GetButton("Fire2"))
22.     {    
23.         zoomedIn = true;
24.     }
25.        
26.     //If "zoomedIn" is true, then it will not zoom in, but if it's false (not zoomed in) then it will zoom in.    
27.     if( zoomedIn == true )
28.     {  
29.             script.bobbingSpeed = new Vector3( Mathf.Lerp(script.bobbingSpeed, aim, Time.deltaTime*smooth));
30.     }
31.     else
32.     {
33.             script.bobbingSpeed = new Vector3( Mathf.Lerp(script.bobbingSpeed, aim, Time.deltaTime*smooth));
34.  
35.     }
36. }

 

whoops, made it for the wrong script. Read this one...

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class GunAimY : MonoBehaviour {
5.     public float aim = 0.0;
6.     public float normal = 0.0;
7.     public float smooh = 5;
8.     public GunSway script;
9.  
10.     // Use this for initialization
11.     void Start ()
12.     {
13.         script = gameObject.GetComponent<GunSway>();  
14.     }
15.    
16.     // Update is called once per frame
17.     void Update ()
18. {
19.  
20.         zoomedIn = false;
21.     if (Input.GetButton("Fire2"))
22.     {    
23.         zoomedIn = true;
24.     }
25.        
26.     //If "zoomedIn" is true, then it will not zoom in, but if it's false (not zoomed in) then it will zoom in.    
27.     if( zoomedIn == true )
28.     {  
29.             script.defaultPosition.y = new Vector3( Mathf.Lerp(script.defaultPosition.y, aim, Time.deltaTime*smooth));
30.     }
31.     else
32.     {
33.             script.defaultPosition.y = new Vector3( Mathf.Lerp(script.defaultPosition.y, aim, Time.deltaTime*smooth));
34.  
35.     }
36. }

 

You need one more closing } on the end to close the class scope

 

Okay, I did that, but now I'm getting errors on the variables. Why? They look right to me...

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class GunAimY : MonoBehaviour {
5.     public float aim = 0.0;
6.     public float normal = 0.0;
7.     public float smooh = 5;
8.     public GunSway script;
9.  
10.     // Use this for initialization
11.     void Start ()
12.     {
13.         script = gameObject.GetComponent<GunSway>();  
14.     }
15.    
16.     // Update is called once per frame
17.     void Update ()
18. {
19.  
20.         zoomedIn = false;
21.     if (Input.GetButton("Fire2"))
22.     {    
23.         zoomedIn = true;
24.     }
25.        
26.     //If "zoomedIn" is true, then it will not zoom in, but if it's false (not zoomed in) then it will zoom in.    
27.     if( zoomedIn == true )
28.     {  
29.             script.defaultPosition.y = new Vector3( Mathf.Lerp(script.defaultPosition.y, aim, Time.deltaTime*smooth));
30.     }
31.     else
32.     {
33.             script.defaultPosition.y = new Vector3( Mathf.Lerp(script.defaultPosition.y, aim, Time.deltaTime*smooth));
34.  
35.     }
36. }
37. }

Assets/GunAimY.cs(5,30): error CS0664: Literal of type double cannot be implicitly converted to type `float'. Add suffix `f' to create a literal of this type

also on line (6,33).

 

Read the error message carefully and think about what to do I'm sure you can figure this one out for yourself.

 

You should probably do this:

 

I don't get what it's it's talking about though. Add 'f'? Why would I add f?

 

C# requires everything to be strongly typed. 1.6 is a double. 1.6f is a float. You can't assign a double to a float.

Code (CSharp):

1. public float aim = 0.0f;