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Learn how to develop a Sprite class from which you can instantiate and animate swarms of sprite objects.

Table of contents


This module is one in a collection of modules designed to teach you about the anatomy of a game engine.

Although the modules in this collection will concentrate on the Java game library named Slick2D, theconcepts involved and the knowledge that you will gain is applicable to different game engines written in different programming languages as well.

The purpose of this module is to teach you how to develop a sprite class (see Sprite01 ) from which you can instantiate and animate swarms of sprite objects.

Viewing tip

I recommend that you open another copy of this module in a separate browser window and use the following links to easily find and view the imagesand listings while you are reading about them.


  • Figure 1 . Graphic output from program named Slick0200.
  • Figure 2 . Graphic output from the earlier program.


  • Listing 1 . Beginning of the class named Sprite01.
  • Listing 2 . Beginning of the class named Slick0200.
  • Listing 3 . Beginning of the init method.
  • Listing 4 . Populate the array.
  • Listing 5 . The update method.
  • Listing 6 . The move method of the Sprite01 class.
  • Listing 7 . The edgeBounce method of the Sprite01 class.
  • Listing 8 . The render method.
  • Listing 9 . The draw method of the Sprite01 class.
  • Listing 10 . Source code for the program named Slick0200.
  • Listing 11 . Source code for the sprite class named Sprite01.


I will present and explain a program that uses a class named Sprite01 (see Listing 11 ) to produce an animation of 1000 ladybug sprite objects flying around inside thegame window as shown in Figure 1 .

Figure 1 . Graphic output from program named Slick0200.
Missing image.

The frame rate

As you can see from the text in the upper-left corner of Figure 1 , the program is running at 62 frames per second. My rather old desktop computer can maintain this frame rate up to about 7000 sprite objects.Beyond that, it can no longer handle the computing load and the frame rate begins to decrease.

What you have learned

In the previous module, you learned how to use objects of the SpriteSheet class and the Animation class to perform relatively complex sprite sheet animations.

What you will learn

In this module, you will learn how to develop a sprite class from which you can instantiate and animate swarms of sprite objects. In the next two modules,you will learn how to put that class to work.

General background information

While the Slick2D library provides many useful classes, there is nothing to stop you from developing your own classes to work in combination with theSlick2D library classes. That is the thrust of this module.

In an earlier module titled Slick0150: A first look at sprite motion, collision detection, and timing control , you learned how to cause a single sprite to bounce around inside the game window as shown in Figure 2 .

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
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Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
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what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
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Source:  OpenStax, Anatomy of a game engine. OpenStax CNX. Feb 07, 2013 Download for free at https://legacy.cnx.org/content/col11489/1.13
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