Object Oriented Programming and Games

Building a ProjectThe building blocks of your game.

Variables Functions Conditions

These store data. These do actions.These perform checks and comparisons between variables and facilitate actions.

An Actionscript game is made up of several files with code in them.

These individual files in a program are called Classes. Classes make up the basic structure of every unique item in a game.

Building a ProjectClasses in code are a big deal.

Classes are made up of variables, functions, and conditions which are all put together to provide a purpose.

Classes are like mini programs.

We create classes to define unique objects in our code.

PackagesIn Actionscript 3 we use something called a Package.A package is a collection of classes.A game can be made from multiple or one package

Building a ProjectThe building blocks of your game.

Building a ProjectThe building blocks of your game.

This is Object Oriented ProgrammingObject oriented is how you will create your games.

• You have modular code that you can reuse.

• Because we kept our code in different classes, its modular and reusable.

This is Object Oriented ProgrammingWhat’s the benefit?

A game is made of:- Variables- Functions- Conditions- Classes- Package(s)

Lets apply this to a game model.

Building a gameUsing code structures to make something cool.

Applying the conceptsHow these coding terms fit into a game.

BrickBreaker - Classic and a good place to start

Applying the conceptsHow these coding terms fit into a game.

“We create classes for every unique object in our code.”

What are the unique objects in BrickBreaker?

What would the classes be?

Applying the conceptsHow these coding terms fit into a game.

What are the unique objects?

- Ball

- Paddle (Player)

- Bricks

- The stage we play on

All of these will need to be built as separate classes.

What attributes and actions do each class have?

Ball Stage- Graphics - Collision Detection- Speed - Keeping track of objects on stage- Bounce - Updating movement

Paddle Bricks- Graphics - Graphics- Speed - Knowing when they are hit

Applying the conceptsHow these coding terms fit into a game.

• The attributes will be comes the variables in each class, and the actions will become the functions.

Applying the conceptsHow these coding terms fit into a game.

• It was mentioned before that object oriented programming is reusable.

• If we built the classes to make brickbreaker, we could easily use those same classes to make Pong without rewriting an entire program.

• What would we change?- The ball class would be the same- The orientation of the paddles

would change- The bounds of the stage would be

different

Modular code = happinessThe benefit of Object Oriented.

BrickBreaker!

So lets make a game.