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Listing 6 . The main method.
public static void main(String[] args)throws SlickException{ try{AppGameContainer app = ( new AppGameContainer(new Slick0130a(),400,200,false)); app.start();}catch(SlickException e){ e.printStackTrace();}//end catch }//end main

A different constructor

Listing 6 calls a different overloaded constructor for the AppGameContainer class than I have used in earlier modules.

This version of the constructor allows for setting the width and height of the game window. In this case, the game window is set to a width of 400 pixelsand a height of 200 pixels as shown in Figure 1 .

The last parameter to this constructor is described as a boolean parameter that allows for the selection of a full-screen game window. As of thiswriting, I have been unable to get this to work. When I set the third parameter to true, I get a compiler error. However, I haven't spent any time investigatingwhat I might be doing wrong.

The overridden init method

The overridden init method is shown in Listing 7 .

Listing 7 . The overridden init method.
public void init(GameContainer gc) throws SlickException {//Set the frame rate in frames per second. gc.setTargetFrameRate(2);}//end init

Set the target frame rate

Listing 7 calls the setTargetFrameRate on the GameContainer object passing 2 as a parameter. The description of this method in the javadocs is "Set the target fps we're hoping to get,"

The overridden update method

Listing 8 shows the overridden update method.

Listing 8 . The overridden update method.
public void update(GameContainer gc, int delta) throws SlickException{//Compute and save total time since start in seconds. totalTime += delta/1000.0;//Save delta for display in render method.incrementalTime = delta;}//end update

Compute total elapsed time

Listing 8 converts the incoming value of delta in milliseconds into seconds and adds it to the value stored in the instancevariable named totalTime that is declared in Listing 5 . The totalTime value will be used to display the first line of text near the center of Figure 1 .

Save the value of delta

Listing 8 saves the incoming value of delta in the instance variable named i ncrementalTime that was also declared in Listing 5 . The value stored in incrementalTime will be used to display the second line of text near the center of Figure 1 .

The overridden render method

Listing 9 shows the overridden render method.

Listing 9 . The overridden render method.
public void render(GameContainer gc, Graphics g) throws SlickException{//Truncate totalTime to one decimal digit and // displaydouble time = (int)(totalTime*10)/10.0; g.drawString("totalTime: "+time,100.0f,100.0f);//Display incremental time.g.drawString("incrementalTime: " + incrementalTime, 100.0f,120.0f);}//end render

Truncate and draw the total time

Listing 9 begins by truncating the value of totalTime to only two decimal digits and saving the truncated value in a local variable named time . I will leave it as an exercise for the student to analyze the code that I used todo that.

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
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
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
what is a peer
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
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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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