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Learn to use objects of the Slick2D SpriteSheet class and the Animation class to perform more complex spritesheet animation than in the previous module.

Table of contents

Preface

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 use objects of the SpriteSheet class and the Animation class to perform more complex sprite sheet animations than was the case in the earlier moduletitled Slick0180: Sprite sheet animation, part 1 .

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.

Figures

Listings

  • Listing 1 . Beginning of the class named Slick0190.
  • Listing 2 . Beginning of the init method.
  • Listing 3 . Begin populating the Animation object.
  • Listing 4 . Add images from the bottom row of
  • Listing 5 . Finish populating the animation object.
  • Listing 6 . Beginning of the update method.
  • Listing 7 . Compute display locations for first 20 frames.
  • Listing 8 . Don't change position for middle group of sprite images
  • Listing 9 . Run from right to left.
  • Listing 10 . The render method.
  • Listing 11 . Source code for Slick0190.

Preview

I will present and explain a program that uses both rows of sprites from the sprite sheet shown in Figure 1 . The program uses a SpriteSheet object and an Animation object to produce an animation of a dog playing and answering nature's call. (Note that the overall sprite sheet image is quite small, and the image shown in Figure 1 was enlarged for this presentation.)

Figure 1 . The sprite sheet.
Missing image.

Description of the animation

This animation begins with the sprite running from left to right across the game window. Then the sprite stops on the right side of the game window and answers nature's call. Although it isn't shown here, the sprite turns andfaces left during that process. Then the sprite runs from right to left across the game window. This pattern repeats for as long as the program runs, and is illustrated by the three screen shots that follow.

Sprite running to the right

Figure 2 shows the sprite running from left to right. This is a flipped version of one of the images in the top row of Figure 1 .

Figure 2 . Sprite running to the right.
Missing image.

Sprite answering nature's call

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
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.
Bharti
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
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
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
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
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.
Tarell
what is the actual application of fullerenes nowadays?
Damian
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.
Tarell
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.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
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Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
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what is the function of carbon nanotubes?
Cesar
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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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