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Straightforward code

The code in Listing 1 is straightforward. It simply declares a number of instance variables, most of which become properties of the object. Listing 1 also defines a constructor that receives and saves values for many of thoseproperties.

The remaining code in Sprite01

If you examine the remaining code in Listing 11 , you will see that it consists of simple property accessor methods along withsome methods that control the behavior of an object of the class. I will explain those behavioral methods when I use them later in this and the next two modules.

The class named Slick0200

Will discuss in fragments

A complete listing of the program named Slick0200 is provided in Listing 10 . I will break the program down and explain it in fragments.

Beginning of the class named Slick0200

The class named Slick0200, down through the main method is shown in Listing 2 .

Listing 2 . Beginning of the class named Slick0200.
public class Slick0200 extends BasicGame{//Store references to Sprite01 objects here. Sprite01[]sprites = new Sprite01[1000];//Populate this with a ladybug image later.Image image = null;//Populate these variables with the background // image along with the width and height of the// image later. Image background = null;float backgroundWidth; float backgroundHeight;//This object produces random float values for a// variety of purposes. Random random = new Random();//Frame rate we would like to see and maximum frame// rate we will allow. int targetFPS = 60;//----------------------------------------------------// public Slick0200(){//constructor//Set the title super("Slick0200, baldwin");}//end constructor //----------------------------------------------------//public static void main(String[] args)throws SlickException{ AppGameContainer app = new AppGameContainer(new Slick0200(),414,307,false); app.start();}//end main

Everything in Listing 2 is completely straightforward and should not require an explanation beyond the embedded comments.

The init method

The init method begins in Listing 3 .

Listing 3 . Beginning of the init method.
public void init(GameContainer gc) throws SlickException {//Create and save the background image object. Also // compute and save the width and height of the image.background = new Image("background.jpg"); backgroundWidth = background.getWidth();backgroundHeight = background.getHeight(); //Create and save an Image object of a ladybug. The// sprites will wear this image image = new Image("ladybug.png");

There is also nothing new in Listing 3 . Therefore, the embedded comments should suffice to explain the code.

Populate the array

Listing 4 uses a for loop to populate the array object referred to by the variable named sprites that was declared in Listing 2 . The array object is populated with references to objects of the class Sprite01 .

Listing 4 . Populate the array.
//Populate the array with references to objects of // the Sprite01 class.for(int cnt = 0;cnt<sprites.length;cnt++){ sprites[cnt]= new Sprite01( image,//ladybug imagebackgroundWidth/2.0f,//initial position backgroundHeight/2.0f,//initial position(random.nextFloat()>0.5) ? 1f : -1f,//direction (random.nextFloat()>0.5) ? 1f : -1f,//direction 0.1f+random.nextFloat()*2.0f,//step size0.1f+random.nextFloat()*2.0f,//step size random.nextFloat()*0.15f,//scalenew Color(random.nextFloat(),//color filter random.nextFloat(),random.nextFloat())); }//end for loopgc.setTargetFrameRate(targetFPS);//set frame rate }//end init

Questions & Answers

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
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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
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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
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
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sciencedirect big data base
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Introduction about quantum dots in nanotechnology
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what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
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Berger describes sociologists as concerned with
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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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