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Instance variables

Listing 1 declares a number of instance variables. The purpose of these variables should become clear based on their names andtheir usage that I will discuss later.

The constructor and the main method

There is nothing new in the constructor and the main method in Listing 1 .

The init method

The init method begins in Listing 2 . The embedded comments should provide a sufficient explanation of the code in Listing 2 .

Listing 2 . Beginning of the init method.
public void init(GameContainer gc) throws SlickException {spriteSheetImage = new Image("Slick0180a1.png"); //Enlarge the sprite sheet.Image temp = spriteSheetImage.getScaledCopy(580,224); spriteSheetImage = temp;//Get, save, and display the width and the height // of the sprite sheet.spriteSheetWidth = spriteSheetImage.getWidth(); spriteSheetHeight = spriteSheetImage.getHeight();System.out.println( "spriteSheetWidth: " + spriteSheetWidth);System.out.println( "spriteSheetHeight: " + spriteSheetHeight);//Compute the width and height of the individual// sprite images. spriteWidth = (int)(spriteSheetWidth/spritesPerRow);spriteHeight = (int)(spriteSheetHeight/spritesPerColumn);

Create a SpriteSheet object

Listing 3 creates a new SpriteSheet object based on the sprite sheet image along with the width and height of the individual sprites.

Listing 3 . Create a SpriteSheet object.
//Instantiate a new Spritesheet object based on the // width and height of the tiles.spriteSheet = new SpriteSheet(spriteSheetImage, spriteWidth,spriteHeight);

Create a new Animation object

Listing 4 creates a new Animation object that will process the SpriteSheet object instantiated in Listing 3 .

Listing 4 . Create a new Animation object.
//Create a new animation based on a selection of // sprites from the sprite sheet.animation = new Animation(spriteSheet, 0,//first column0,//first row 4,//last column0,//last row true,//horizontalduration,//display time true//autoupdate);

Constructor parameters

Obviously, the first parameter to the constructor for the Animation class specifies the SpriteSheet object.

The second and third parameters specify that the first image in the sequence should be the top-left image in Figure 1 .

The fourth and fifth parameters specify that the last image in the sequence should be the top-right image in Figure 1 .

The true value for the sixth parameter specifies that the images should be scanned horizontally.

The duration value in the seventh parameter specifies that each image should be displayed for 200 milliseconds.

The true value for the last parameter specifies that the display should continue cycling through the images until the animation is stopped.

Set frame rate and display location

The code is Listing 5 sets the frame rate and specifies the drawing location. The drawing location is the locationwithin the game window where the sprite will be displayed.

Questions & Answers

what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
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
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
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
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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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