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Your Introduction to Scripting Tutorial

 
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Aoleon



Joined: 26 May 2010
Posts: 7
PostPosted: Sun May 30, 2010 8:16 am    Post subject: Your Introduction to Scripting Tutorial Reply with quote
Hi,

I just watched your introduction to scripting.

I have a few questions and issues.

1) What are the {} brackets for? You don't tell us when and how to use them.

2) When I copied your move object script and used it in one of my own unity scenes I get the following errors...

Here is the script...

Code:
var moveSpeed : float = 5;
function Update ()
{
   if (Input.GetKey(KeyCode.UpArrow)) {
      transform.Translate(Vector3(0,moveSpeed * Time.deltaTime,0));
   }
   else {
      if (Input.GetKey(KeyCode.DownArrow)) {
         transform.Translate(Vector3(0,-moveSpeed * Time.deltaTime,0));
   }
   if (Input.GetKey(KeyCode.RightArrow)) {
      transform.Translate(Vector3(moveSpeed * Time.deltaTime,0,0));
   }
   else {
      if (Input.GetKey(KeyCode.LeftArrow)) {
      transform.Translate(Vector3(-moveSpeed * Time.deltaTime,0,0));
      }
   }
}

fuction Start ()
{
   while (true) {
      Debug.Log(transform.position.ToString());
      yield;
   }
}


Here are the errors...
Quote:
- Finished compile Library/ScriptAssemblies/Assembly - UnityScript - first pass.dll
Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js(19,2): BCE0044: expecting }, found ''.

(Filename: Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js Line: 19)

Updating assets/standard assets/scripts/active scripts/gui scripts/cameramove.js - GUID: 2f8cefd05223d4fbf81dd4552c47c7c9...
Calculating changed assemblies
End Calculating changed assemblies
- starting compile Library/ScriptAssemblies/Assembly - UnityScript - first pass.dll
done: hash - a37433e1005938a626ec5ea0e6946151
BCE0042: Error reading from 'Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js': 'null reference for: item'.

- Finished compile Library/ScriptAssemblies/Assembly - UnityScript - first pass.dll
Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js(21,Cool: UCE0001: ';' expected. Insert a semicolon at the end.

(Filename: Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js Line: 21)

Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js(21,17): UCE0001: ';' expected. Insert a semicolon at the end.

(Filename: Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js Line: 21)

Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js(23,9): BCE0043: Unexpected token: while.

(Filename: Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js Line: 23)

Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js(23,21): UCE0001: ';' expected. Insert a semicolon at the end.

(Filename: Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js Line: 23)

Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js(24,57): BCE0044: expecting :, found ';'.

(Filename: Assets/Standard Assets/Scripts/ACTIVE SCRIPTS/GUI SCRIPTS/CameraMove.js Line: 24)
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GargerathSunman



Joined: 20 Jul 2009
Posts: 47
PostPosted: Wed Jun 09, 2010 4:09 pm    Post subject: Reply with quote
You missed a down bracket after these lines:
Code:
if (Input.GetKey(KeyCode.DownArrow)) {
         transform.Translate(Vector3(0,-moveSpeed * Time.deltaTime,0));


Put one there and you'll be fine.

The brackets mark what statement you're currently inside in the script. The up bracket, {, marks an entrance to a statement and the down bracket, }, marks an exit. All if statements, loops, and functions need them so the code knows where you currently are.

Code:
if (upBracket) {
    downBracket = true;
}


Whenever you have more up brackets than down brackets, it can't figure out where the exit is and runs a gigantic list of errors like the ones you saw.
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