[SOLVED] Set WorldTrigger callbacks within user class instance

[jica.monsanto.ph]

Hi!

 

I have a class that 'inherits' from WorldTrigger. When I call setEnterCallback() inside the class, this error shows:

WorldTriggerCallback::run(): can't find "on_enter" callback function

where "on_enter" is a method inside my WorldTrigger child class.

 

I tried calling setEnterCallback() in the world script. It worked but the callback function is inside the world script. I'd like to know if there's a way to set the callback to be an instance method and not a world script method since I will be managing lots of trigger instances with callbacks.

 

Thanks!

 

P.S. I'd like to apply this to Widgets and BodyRigids too

[unclebob]

Hi,

 

Yes, you can put callbacks inside classes. Main idea is to pass reference to 'this' as additional argument. Here is an example for WorldTrigger:

 

class MyTrigger : WorldTrigger {
 private:

   /*
    */
   void on_enter(Node node,MyTrigger trigger) {
     log.message("on_enter: %s %s\n",typeinfo(node),typeinfo(trigger));
   }

   /*
    */
   void on_leave(Node node,MyTrigger trigger) {
     log.message("on_leave: %s %s\n",typeinfo(node),typeinfo(trigger));
   }

 public:

   MyTrigger(vec3 sizes) {
     extern = new WorldTrigger(sizes);
     extern.setEnterCallback("::MyTrigger::on_enter",this);
     extern.setLeaveCallback("::MyTrigger::on_leave",this);
   }
};

 

And for widgets:

 

class MyButton : WidgetButton {
 private:

   /*
    */
   void on_click(MyButton button) {
     log.message("on_click: %s\n",typeinfo(button));
   }

 public:

   MyButton(Gui gui) {
     extern = new WidgetButton(gui);
     extern.setCallback(GUI_CLICKED,"::MyButton::on_click",this);
   }
};

[jica.monsanto.ph]

That did the trick! Thanks! :)

[mandee.cabato.ph]

Hi, is this in the documentation? We're all newbies in the team and haven't quite figured our way around the documents. :-)

[unclebob]

I didn't quite get your question.

 

But our docs have information about 'inheritance' from extern classes and about WorldTrigger callbacks.

 

About inheritance: https://developer.un.../language/class (see 'Inheritance from Base Engine and Extern C++ Classes' section)

About WorldTrigger callbacks: https://developer.un...ss.worldtrigger (see 'WorldTrigger::setLeaveCallback' and 'WorldTrigger::setEnterCallback' sections)

 

Also, you can see this topic about inheritance details: https://developer.un...__fromsearch__1

 

Hope I answered your question. :)

[manguste]

I've added info on callbacks in the inherited classes (Bob's examples) into docs :)