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Listing 11 . Source code for the sprite class named Sprite01.
/*Sprite01.java Copyright 2013, R.G.BaldwinAn object of this class can be manipulated as a sprite in a Slick2D program.Tested using JDK 1.7 under WinXP *********************************************************/import org.newdawn.slick.AppGameContainer; import org.newdawn.slick.BasicGame;import org.newdawn.slick.GameContainer; import org.newdawn.slick.Graphics;import org.newdawn.slick.Image; import org.newdawn.slick.SlickException;import org.newdawn.slick.Color; public class Sprite01{Image image = null;//The sprite wears this image float X = 0f;//X-Position of the spritefloat Y = 0f;//Y-Position of the sprite float width = 0f;//Width of the spritefloat height = 0f;//Height of the sprite float xStep = 1f;//Incremental step size in pixels - Xfloat yStep = 1f;//Incremental step size in pixels - Y float scale = 1f;//Scale factor for draw methodColor colorFilter = null;//Color filter for draw methodfloat xDirection = 1.0f;//Move to right for positive float yDirection = 1.0f;//Move down for positiveint life = 1;//Used to control life or death of spriteboolean exposed = false;//Used in the contagion program//Constructorpublic Sprite01(Image image,//Sprite wears this image float X,//Initial positionfloat Y,//Initial position float xDirection,//Initial directionfloat yDirection,//Initial direction float xStep,//Initial step sizefloat yStep,//Initial step size float scale,//Scale factor for drawingColor colorFilter) throws SlickException {//Save incoming parameter values this.image = image;this.X = X; this.Y = Y;this.xDirection = xDirection; this.yDirection = yDirection;this.xStep = xStep; this.yStep = yStep;this.scale = scale; this.colorFilter = colorFilter;//Compute and save width and height of imagewidth = image.getWidth(); height = image.getHeight();}//end constructor //----------------------------------------------------////The following accessor methods make many of the // important attributes accessible to the using// program. //----------------------------------------------------//public Image getImage(){return image; }//end getSprite//----------------------------------------------------//public void setImage(Image image) throws SlickException{ this.image = image;width = image.getWidth(); height = image.getHeight();}//end setImage //----------------------------------------------------//public float getWidth(){return width; }//end getWidth//----------------------------------------------------// public float getHeight(){return height; }//end getWidth//----------------------------------------------------//public float getX(){ return X;}//end getX //----------------------------------------------------//public void setX(float X){this.X = X; }//end setX//----------------------------------------------------// public float getY(){return Y; }//end getY//----------------------------------------------------// public void setY(float Y){this.Y = Y; }//end setY//----------------------------------------------------//public float getXDirection(){ return xDirection;}// end getXDirection //----------------------------------------------------//public void setXDirection(float xDirection){this.xDirection = xDirection; }//end setXDirection//----------------------------------------------------//public float getYDirection(){ return yDirection;}//end getYDirection //----------------------------------------------------//public void setYDirection(float yDirection){this.yDirection = yDirection; }//setYDirection//----------------------------------------------------//public float getXStep(){ return xStep;}//end getXStep //----------------------------------------------------//public void setXStep(float xStep){this.xStep = xStep; }//end setXStep//----------------------------------------------------//public float getYStep(){ return yStep;}//end getYStep //----------------------------------------------------//public void setYStep(float yStep){ this.yStep = yStep;}//end setYStep //----------------------------------------------------//public float getScale(){return scale; }//end getScale//----------------------------------------------------// public void setScale(float scale){this.scale = scale; }//end setScale//----------------------------------------------------//public Color getColorFilter(){ return colorFilter;}//end getColorFilter //----------------------------------------------------//public void setColorFilter(float red,float green,float blue){ colorFilter = new Color(red,green,blue);}//end setColorFilter //----------------------------------------------------//public int getLife(){return life; }//end getLife//----------------------------------------------------//public void setLife(int life){ this.life = life;}//end setLife //----------------------------------------------------//public boolean getExposed(){return exposed; }//end getExposed//----------------------------------------------------//public void setExposed(boolean exposed){ this.exposed = exposed;}//end setExposed //----------------------------------------------------////This method causes the sprite to be drawn each time// it is called. public void draw(){image.draw(X,Y,scale,colorFilter); }//end draw//----------------------------------------------------////This method detects collisions between this // rectangular sprite object and another rectangular// sprite object by testing four cases where a // collision could not possibly occur and assuming that// a collision has occurred if none of those cases // are true.public boolean isCollision(Sprite01 other){ //Create variable with meaningful names make the// algorithm easier to understand. Can be eliminated // to make the algorithm more efficient.float thisTop = Y; float thisBottom = thisTop + height*scale;float thisLeft = X; float thisRight = thisLeft + width*scale;float otherTop = other.getY();float otherBottom = otherTop + other.getHeight()*other.getScale(); float otherLeft = other.getX();float otherRight = otherLeft + other.getWidth()*other.getScale(); if (thisBottom<otherTop) return(false); if (thisTop>otherBottom) return(false);if (thisRight<otherLeft) return(false); if (thisLeft>otherRight) return(false);return(true); }//end isCollision//----------------------------------------------------//public void move(){ X += xDirection*xStep;Y += yDirection*yStep; }//end move//----------------------------------------------------//public void edgeBounce(float winWidth,float winHeight){ //Test for a collision with one of the edges and// cause to sprite to bounce off the edge if a // collision has occurred.if(X + width*scale>= winWidth){ //A collision has occurred.xDirection = -1.0f;//reverse direction //Set the position to the right edge less the// width of the sprite. X = winWidth - width*scale;}//end if//Continue testing for collisions with the edges // and take appropriate action.if(X<= 0){ xDirection = 1.0f;X = 0; }//end ifif(Y + height*scale>= winHeight){ yDirection = -1.0f;Y = winHeight - height*scale; }//end ifif(Y<= 0){ yDirection = 1.0f;Y = 0; }//end if}//end edgeBounce //----------------------------------------------------//}//end class Sprite01

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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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit 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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