Interfaces

Interfaces allow you to define methods a class implementing the interface and how to handle them.
All the methods specified in an interface must be implemented in a class.

interface GeometricShape {
    public function getArea();
    public function draw();
    // ...
}

Features of an Interface:

• A class can implement several interfaces.
• Interface constant cannot be overridden.
• Methods cannot contain code/logic.
• Methods must be public.
• Slower than abstract classes

Abstract Classes

Abstract classes look like interfaces but, this abstract classes can define methods, in other words, you can put a “default” logic to the abstract class methods.

abstract class GeometricShape {
    abstract protected function getArea() {
        // You can add some "default" code here
        return 0;
    }
}

Features of Abstract Classes

• A class can only extend one abstract class.
• Constrants can be overridden.
• Methods can contain logic (i.e. default code which can be overridden).
• Shared code can be in abstract classes.
• Fast.

There are more features you can find in an interface or an abstract class, however I don’t recall them right now

• http://php.net/manual/en/language.oop5.interfaces.php
• http://www.php.net/manual/en/language.oop5.abstract.php

There is this, group of friends I have (including me) with a common goal: we want to make a videogame, but, we have tried to do this for a long, long time now, looks like whatever we plan, it always get stucked. I’ve been asking me “why we can’t make a videogame?”.

Well, it seems like we always say we want to make a videogame and immediately after we start to code / draw, so, we are meeting again, and I’ll ask a lot of questions, like:

• What kind of videogame are we developing?
• What is the fun factor of it?
• How complex do we intend to do this game? Is it casual? is it hardcore?
• What can I do for the project to succeed?

These questions, and probably many more will come to my head, but perhaps, this time, we can do something, with a well-thought base idea.

I really like this tool and it’s really worth the price ($25 USD). If you are using Unity and you want to make a 2D game, try ex2D you wont be dissapointed.

When you are in Unity, it looks something like this (depending on your projects art ):

I’m starting this project, it is a 2D side scroller, and the 2D/3D mixing looks really nice:

Official ex2D website: http://www.ex-dev.com/ex2d/