Creating object properties dynamically in unity javascript.

Question

I am new to "unity Script", which seems to actually be fake javascript, and I'm not sure just how strict it is.

In plain old "nothing's sacred" Javascript, you can have, for instance:

 var canvas;
 canvas = document.getElementById("cvs");
 canvas.my_New_Attribute_Out_Of_Thin_Air_Because_Javascript = { "and" : 1,
                                                                "this" : 2,
                                                                "was" : "awesome"
                                                              };

Now it has come to my attention that this poop don't fly with unityScript...

My question is, is there any similarly convenient way to assign some attributes to some object?

The reason I wanted this behaviour, is that I have a large project with objects like "special_box : GameObject" already used in various places/ways, and it would be annoying to turn that into a data structure which contains "special_box" and other properties...

Answer 1

Best Answer

Answer by bamboo · Oct 06, 2012 at 02:03 PM

You can enable that behavior through the pragma expando directive. In the example below both properties.message and aGameObject.myProperties are dynamic properties.

 #pragma expando
 
 var aGameObject: GameObject;
 
 function Start () {
     
     var properties = new Object();
     properties.message = 'Look, Ma! A dynamic property!';
     
     aGameObject.myProperties = properties;
     
     Go();
 }
 
 function Go () {
     while (true) {
         yield WaitForSeconds(3);
         Debug.Log(aGameObject.myProperties.message);
     }
 }

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Tudor · Oct 06, 2012 at 02:53 PM 0

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That's the stuff! I promise I will use it wisely :) (as in, not for serious projects). Also, this directive sounds like a harry potter spell...

Answer 2

Answer by DaveA · Oct 05, 2012 at 10:54 PM

It seems I heard of someone that made a plugin to do that kind of thing, but I would recommend against it, if you care about performance.

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Tudor · Oct 06, 2012 at 12:07 PM 0

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If you know what it was called, don't keep it to yourself. It might just be fine for my project.

Creating object properties dynamically in unity javascript.

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