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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

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
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
what is biological synthesis of nanoparticles
Sanket 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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