Collecting Papers and Keeping Track of how many collected - need help

Question

Hi, having many issues. This is my code... the furthest I've gotten after a half day trying to get it to work. I have 30 papers scattered around my scene and I want the papers to be destroyed/vanish when the first person controller touches them and I'd like the 'score' to count the number collected - so far this code is only able to display the GUI as 0 Papers - which is great, but I really need help on this.

var papersDisplay : GUIText;

var paper = 0;

var paperToWin = 30;

function Start() {

 DisplayAmount();

}

function DisplayAmount () {

 papersDisplay.text = ""+ paper + " Papers";

}

function OnTriggerEnter( other : Collider ) {

 if (other.tag == "paper") {
 
     paper += 1;
 
     Destroy(other.gameObject);
 }

}

Answer 1

Best Answer

Answer by AlucardJay · Apr 14, 2012 at 03:20 AM

A few things to check :

the statement [other.tag == "paper"] should read [other.gameObject.tag == "paper"]
does the gameObject have the tag "paper"
does either the player or the paper have a rigidbody component? e.g. Note that trigger events are only sent if one of the colliders also has a rigidbody attached.
is either of the object's collider's set to [is Trigger]

From the Unity Scripting Reference : http://unity3d.com/support/documentation/ScriptReference/Collider.OnTriggerEnter.html

Edit with code from comments :

   var Paper : int = 0;
     var paperToWin : int = 30;
 
     function Start() {
     } 
 
     function Update() { 
     } 
 
     function OnTriggerEnter( other : Collider ) {
         // Debug.Log("Triggered by [tag] : " + other.gameObject.tag);
         // Debug.Log("Triggered by [name] : " + other.gameObject.name);
         if (other.gameObject.tag == "Paper"){
             Paper += 1;
             Debug.Log("A paper was picked up. Total papers = " + Paper);
             Destroy(other.gameObject);
         }
     }
 
     function OnGUI()
     {
         if (Paper < paperToWin)
         {
             GUI.Box(Rect((Screen.width/2)-100, 10, 200, 35), "" + Paper + " Papers");
         }
         else
         {
             GUI.Box(Rect((Screen.width/2)-100, 10, 200, 35), "All Papers Collected!");
         }
     }

Edit : uploaded an example using this script.

Here is a link to an example : http://www.alucardj.net16.net/unityanswers/PickUpPaper.html

Here is a link to the script on the example : http://www.alucardj.net16.net/unityanswers/ScriptPickUpPaper.js

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AlucardJay · Apr 14, 2012 at 03:35 AM 0

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Please post comments here

AlucardJay · Apr 14, 2012 at 03:41 AM 0

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ok to check if the the trigger is working , try some Debugging.

put this as the first and second line in the OnTriggerEnter. The console should print some information when the trigger is activated. IF no printout , the trigger is not working.

     Debug.Log("Triggered by [tag] : " + other.gameObject.tag);
     Debug.Log("Triggered by [name] : " + other.gameObject.name);

also , try setting the collider of the paper to Is Trigger = enabled.

Th1rt33nth · Apr 14, 2012 at 03:57 AM 0

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Tried it - Had a multiple print outs: Triggered by [tag] Untagged, as well as [name] First Person Controller, and [tag]Paper, and [name] PAPER, and [name] lst Floor 002.... so yeah, what does that mean?

AlucardJay · Apr 14, 2012 at 04:06 AM 0

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that's it then =] the trigger is working , but you need to change your if statement. Note the printout shows the papers tag as Paper , not paper. (capitol P). so now :

     if (other.gameObject.tag == "Paper") {

now you see that you can use a name as well as a tag to check things! Hope this helps =]

Th1rt33nth · Apr 14, 2012 at 04:20 AM 0

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Ok, that totally was the case... gah, it's alway such a tiny error. HOWEVER! Unfortunately... while the papers now vanish, the 'score' is not increasing! Any ideas... Here's the revised code:

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Collecting Papers and Keeping Track of how many collected - need help

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