<< Chapter < Page Chapter >> Page >

You will learn how to write a minimal Java application in conjunction with a set of Slick2D jar files to create your own Slick2D game engine. Using that programas an example, you will learn about the overall structure of the Slick2D game engine.

You will learn that game engines are typically service provider programs and you will learn about a common set of services that is provided bymany game engines.

You will learn about the two cooperating objects that form the heart of the Slick2D game engine.

You will learn about the methods declared in the interface named Game .

What is a game engine?

The term "game engine" is jargon for something that is more properly called a "software framework."

A software framework

Here is part of what Wikipedia has to say about a software framework:

A software framework , in computer programming, is an abstraction in which common code providing generic functionality can be selectively overridden or specialized by user code providing specific functionality .

Frameworks are a special case of software libraries in that they are reusable abstractions of code wrapped in a well-defined API, yet they contain some key distinguishing features that separate them from normal libraries.

Software frameworks have these distinguishing features that separate them from libraries or normal user applications :

  1. inversion of control - In a framework, unlike in libraries or normal user applications, the overall program's flow of control is not dictated by the caller, but by the framework.
  2. default behavior - A framework has a default behavior. This default behavior must actually be some useful behavior and not a series of no-ops.
  3. extensibility - A framework can be extended by the user by selective overriding of framework code in order to provide specific functionality
  4. non-modifiable framework code - The framework code, in general should not normally be modified by the user. Users can extend the framework, butnormally should not modify its code.

In short, a framework is a computer program that helps you to write computer programs.

Not a game engine

Under this definition, Slick2D in its raw form is not a game engine nor is it a framework. Instead, it is a library of Java classes that you can use to create aframework or game engine.

In particular, if you combine the contents of the files named slick.jar and lwjgl.jar with the minimal Java application shown in Listing 1 and described in Figure 1 , you will have created a game engine. That combination is what I will refer to hereafter as the Slick2D game engine .

Having done that, the framework description given above is a good match for the Slick2D game engine.

Background information

Listing 1 shows a very simple Java application program.This is possibly the simplest program that can be written using Slick2D that will run as a Java application.

(A different approach is used to create a Slick2D program that will run as a Java applet, but I probably won't get into Java applets in this collection ofmodules.)

I will use this program to explain the overall structure of the Slick2D game engine in this module. I will explain the inner workings of the game engine in more detail infuture modules.

Questions & Answers

Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Anatomy of a game engine. OpenStax CNX. Feb 07, 2013 Download for free at https://legacy.cnx.org/content/col11489/1.13
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Anatomy of a game engine' conversation and receive update notifications?

Ask