When importing C2 projects, C3 guesses the C3 ID by converting to lowercase and adding dashes, e.g. "My Property" -> "my-property". You used an underscore though ("my_property"), if you use a dash it should import correctly. If it doesn't automatically get the right name you can use the LoadC2Property method. But I just realised none of this is documented, so I should update the docs

Now LoadC2Property is documented here

construct.net/make-games/manuals/addon-sdk/reference/base-classes/iinstancebase

But it's still unclear how to use this method. There's "Script files" property in the c2 version of my plugin. And there's a corresponding "Scriptfiles" property ID in the c3 version. How do I override this using LoadC2Property method?

You can't convert a plugin with Code Templater. You can only create (or recreate) a plugin from scratch with it. Sometimes it makes sense and pays off though. If you got a plugin on your hands that is only for C2, you can recreate it in Code Templater and get all three versions: C2, C3 and C3 runtime 3

Hey!

JS.AliasValue is a Construct expression. It only returns Construct basic types: number or string. It can't return arrays. Construct doesn't understand this type of variables.

Thus, JS.AliasValue( "wavePoints" ) returns 0, so you're calling function "updateWavePoints" with parameter "0".

Also the thing that you're doing is very strange. You have both "updateWavePoints" function and "wavePoints" array in javascript, but instead of calling the function in javascript code, you're trying to call it from Construct. That is wrong on so many levels.

If you're using Javascript Plugin you're supposed to either call javascript functions with parameters from Construct, or do Construct stuff using data from javascript. Using plugin to call javascript functions that operate on javascript data that was taken from javascript to Construst and translated back to javascript, — is weird and ineffective.

Hi, i've a problem with arrays. I've two functions in my js, the first one return an array as result, and it works correctly. Then i need to call the second one passing the array (stored in an alias) as parameter but it seems to not working. What i'm wrong!?

As you can see, "wavePoints" is an array, and i would like to pass to "updateWavePoints" function.

It's hard to create and maintain several versions of the plugin for several Construct versions. The actual code is all the same, but you need to wrap it into different file structures, classes and manifests for each Construct version. This is a boring work that can be automated. This is when Code Templater comes in useful.

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Well it does work because it's actually:

Expression()
{
	//- C2-C3 COMPATIBILITY ------------------------
	var params_ = Array.from(arguments);
	var ret;
	
	if( __CONSTRUCT3_RUNTIME3__ )
		ret = {set_int(){}, set_float(){}, set_string(){}, set_any(){}};
	else
	{
		ret = params_[0];
	
		for( var i=0; i<params_.length-1; i++ ) 
		params_[i] = params_[i+1];
	
		params_.pop();
	}
	//----------------------------------------------

	// runtime-independent code goes here ----------

	ret.set_any( result );
	return result;
}

I'm about to migrate my plugin to the C3 runtime.

Now expression methods should return the value using "return" statement instead of calling ret.set_int/set_float/set_string like it was in the C2 runtime. It's cool and all but I need to support both (C2 runtime and C3 runtime) versions of the plugin and the last thing I need is having two of every expression methods that are almost identical.

I thought I could avoid having identical methods by doing both "return" and "ret_set":

Expression() 
{ 
	// code goes here ------------

	ret.set_any( result ); 
	return result;
}

What's the situation with this.runtime.getProjectFileUrl in the new C3 runtime? How do I get file urls?

Ashley

Due to the way preview mode works in C3 loading local files has to be done slightly differently. This is one of the few differences in the runtime in C3. Instead of using "myscript.js" directly, call:

var realUrl = this.runtime.getProjectFileUrl("myscript.js");[/code:26wp3i4q]

That gives you the real URL to request that will work in both preview and export.