Graal Forums - Object Oriented Programming tutorial

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Prozac

02-13-2006 08:58 PM

Object Oriented Programming tutorial

1 Attachment(s)

Still a little rough, but I think it gets the ideas across for a mindset that is more adaptive to learning gs2.

Please feel free to modify/correct/edit and repost revisions to this as needed.
It is for the newcomers to the gs2 community, and can be openly modified by those in the know. (scroll down for latest version)

Rick	02-13-2006 11:32 PM

Put it on the GraalBible.

Fox1545

02-13-2006 11:58 PM

Quote:

Originally Posted by Rick

Put it on the GraalBible.

Put it on the Graal Wiki.

Skyld

02-14-2006 12:01 AM

Quote:

Originally Posted by Prozac

I think the article could do with fluffing out a bit, to make it easier for the average person with no programming knowledge to understand. If you were to start with basic construct of the language, logic behind the construct, why things are what they are and explaining everything in plain English, it might help people more.

Other than that, looking interesting.

Admins

02-14-2006 12:45 AM

Hmmm Prozac you forgot to put the cup down before leaving the washroom :)
It's a good start I think, although it's more a general programming introduction not only about object oriented programming

ApothiX

02-14-2006 03:35 PM

Hmm.. I think your section on Constructors is a bit flawed. Should try looking up what a constructor is before writing about it :)

Quote:

Originally Posted by Stefan

Hmmm Prozac you forgot to put the cup down before leaving the washroom :)

o_O What do you mean by this? xD

Codein

02-14-2006 09:32 PM

Quote:

Originally Posted by ApothiX

o_O What do you mean by this? xD

In his example of an algorithm, with the stuff about what you do in the morning - he forgot to put the cup down.

Prozac

02-15-2006 01:18 AM

ya, thought I might forget some stuff on the first draft.
thanks for the feedback though. Will see what I can do - or, as mentioned, feel free to 'fluff out' the doc as you see fit and post updates of it on here. I may not get back to it for a while.

ApothiX

02-15-2006 02:45 AM

Quote:

Originally Posted by Codein

In his example of an algorithm, with the stuff about what you do in the morning - he forgot to put the cup down.

Oh, lmao xD

JkWhoSaysNi

02-23-2006 10:42 PM

I hardly consider GS2 an OO language. It has some OO concepts yeah but it's not completley object-oriented.
While each NPC does act like a class you cant make relationships between them (either inheritance or association) you can 'inherit' the classes in the class list on the server (which are basically deferred classes). I can call functions on an NPC by using triggeraction but really I should be able to do npcname.functionname.

I can't do this: object = new Class(); (Please correct me if i'm wrong) which means I cant pass objects around. Sure there's the player object which can always be accessed but sometimes it can be useful. (Admittedly not often given the usually small nature of scripts in graal.) While GS2 has some OO concepts its OO model is quite limiting. Though of course it is just a small scripting langage and not a full programming language and doesn't really need a sophisticated object model.

Anyway, what you have there might be quite useful to non-programmers but some of the explanations might serve the opposite purpose you're using terms like code block without saying what a code block is also, i'd use GS2 only. Doesn't make sense to say "Here's some code but don't do it like this." it's like teaching java and saying "Heres an example GUI in AWT but you shouldn't use AWT you should use Swing or SWT."

oh well just my $0.03 (Damn inflation.)

Skyld

02-23-2006 11:57 PM

Quote:

Originally Posted by JkWhoSaysNi

While each NPC does act like a class you cant make relationships between them (either inheritance or association) you can 'inherit' the classes in the class list on the server (which are basically deferred classes).

Can you think of a need to change the current system?

Quote:

Originally Posted by JkWhoSaysNi

I can call functions on an NPC by using triggeraction but really I should be able to do npcname.functionname.

PHP Code:


		
			
public function myFunction()

{

  return true;

}

PHP Code:


		
			
objectName.myFunction();

Quote:

Originally Posted by JkWhoSaysNi

I can't do this: object = new Class(); (Please correct me if i'm wrong) which means I cant pass objects around.

Yes, you can.

PHP Code:


		
			
myVar = new TStaticVar();

myWindow = new GuiWindowCtrl("myWindow");

Quote:

Originally Posted by JkWhoSaysNi

Sure there's the player object which can always be accessed but sometimes it can be useful.

And with player classes, you can add functions to the player object, i.e

PHP Code:


		
			
player.addMessage("Hello there");

JkWhoSaysNi

02-24-2006 01:11 AM

Quote:

Originally Posted by Skyld

Can you think of a need to change the current system?

PHP Code:


		
			
public function myFunction()

{

  return true;

}

PHP Code:


		
			
objectName.myFunction();

Where does the object name come from? Say I have 2 npc's in a level. I want to call a function on one from the other. Currently you can do this with triggeractions.

Quote:

Yes, you can.

PHP Code:


		
			
myVar = new TStaticVar();

myWindow = new GuiWindowCtrl("myWindow");

Yes but I want to my create my own classes. (Just a simple example. I dont really need to do anything like this but it would make gscript more flexible.)

PHP Code:


		
			
class myClass {

someVar = "something";

someVar2;

public function myClass(a,b) {

this.someVar = a;

this.someVar2 = b;

}

public function stringRepresentation() {

return this.someVar @ this.someVar2; 

}

}

PHP Code:


		
			
myVar = new myClass("One", "Two");

myVar2 = new myClass("Three","Four");

player.chat = myVar.stringRepresntation();

say2(myVar2.stringRepresentation());

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