# 1.3 Game 2302-0110: updating the game math library for graphics  (Page 4/20)

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I will also provide exercises for you to complete on your own at the end of the module. The exercises will concentrate on the material that you have learnedin this module and previous modules.

## Discussion and sample code

Much of the code in the library remains unchanged. I explained that code in the previous module and I won't repeat that explanation in this module. Rather,in this module, I will concentrate on explaining the modifications that I made to the library.

## The game-programming library named GM2D02

A complete listing of the modified game-programming library named GM2D02 is provided in Listing 26 .

This library is an update of the earlier game-math library named GM2D01 . This update added the following new capabilities:

• Draw circles to represent GM2D02.Point objects.
• Draw visible lines to represent GM2D02.Line objects.
• Draw visible lines and circles to represent GM2D02.Vector objects.
• Call a setData method to change the values in a GM2D02.ColMatrix object.
• Call a setData method to change the values in a GM2D02.Point object.
• Call a setData method to change the values in a GM2D02.Vector object.
• Call a setHead method or a setTail method to change one of the points that defines a GM2D02.Line object.

Constructors were updated to ensure that existing points, vectors, and lines are not corrupted by using the new set methods to change the values in the ColMatrix and/or Point objects originally used to construct the points, vectors, and lines. The updated constructors create and saveclones of the ColMatrix and/or Point objects originally used to define the Point , Vector , and/or Line objects.

I will explain the new code in the library in conjunction with the explanations of the programs named PointLine03 and PointLine04 .

## The program named PointLine03

A complete listing of the program named PointLine03 is provided in Listing 27 .

This program illustrates the use of draw methods that were added to the GM2D02 game-math library to produce visual manifestations of Point , Line , and Vector objects instantiated from classes in the game-math library. The program also illustrates drawing on off-screenimages and then copying those images to a Canvas object in an overridden paint method.

As mentioned earlier, this program produces the screen output shown in Figure 1 .

Beginning of the class named PointLine03 and the class named GUI

Listing 1 shows the beginning of the class named PointLine03 (including the main method) and the beginning of the class named GUI .

Listing 1 . Beginning of the class named PointLine03 and the class named GUI.
```class PointLine03{ public static void main(String[]args){ GUI guiObj = new GUI();}//end main }//end controlling class PointLine03//======================================================// class GUI extends JFrame{//Specify the horizontal and vertical size of a JFrame // object.int hSize = 400; int vSize = 200;Image osiA;//one off-screen image Image osiB;//another off-screen imageint osiWidth;//off-screen image width int osiHeight;//off-screen image heightMyCanvas myCanvas;//a subclass of Canvas```

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what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
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why?
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?
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
what does nano mean?
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?
absolutely yes
Daniel
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it is a goid question and i want to know the answer as well
Maciej
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
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
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
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?
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 ?
for screen printed electrodes ?
SUYASH
What is lattice structure?
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
how did you get the value of 2000N.What calculations are needed to arrive at it
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