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Figure 3 shows the sprite answering nature's call. This is a flipped version of one of images from the bottom row of Figure 1 .

Figure 3 . Sprite answering nature's call.
Missing image.

Sprite running to the left

Figure 4 shows the sprite running from right to left. This is one of the images from the top row of Figure 1 .

Figure 4 . Sprite running to the left.
Missing image.

What you have learned

In the previous module , you learned how to use objects of the SpriteSheet class and the Animation class to perform simple sprite sheet animation.

What you will learn

In this module, you will learn how to use objects of the SpriteSheet class and the Animation class to perform more complex sprite sheet animations than was in the previous module.

General background information

The SpriteSheet class

There isn't much that's new in this module regarding the SpriteSheet class. The program instantiates and populates a SpriteSheet object and used the images stored in that object to populate an Animation object.

The SpriteSheet object is used in a different way than was the case in the previous module, but that will be explained in conjunction withpopulating the Animation object.

The Animation class

An Animation object is populated in a significantly different way in this module than in the previous module.

In the previous module, a SpriteSheet object's reference was passed to the Animation constructor along with a specification of the images to be extracted from the sprite sheet and the amount of time thateach image should be displayed. The Animation constructor extracted the images from the sprite sheet and populated the new Animation object automatically. Among other restrictions, it was necessary that each image bedisplayed for the same amount of time.

One image at a time

In this module, an empty Animation object is instantiated and then populated one image at a time. (Of course, loops are used to make that process easier.) Among other things, this makes it possible to:

  • Use multiple copies of the individual images on the sprite sheet
  • Use flipped versions of the images on the sprite sheet
  • Specify different display times for the different images on the sprite sheet

Different animation rates

For example, the display times for the images from the bottom row of Figure 1 are four times greater than the display times for the images from the top row. Thus, the animation slows down when the spritestops to answer nature's call on the right side of the game window then speeds up again when the sprite starts running from right to left.

Discussion and sample code

The class named Slick0190

Will discuss in fragments

A complete listing of the program named Slick0190 is provided in Listing 11 . I will break the program down and discuss it in fragments.

Listing 1 shows the beginning of the class named Slick0190 down through the main method. There is nothing in Listing 1 that should require an explanation beyond the embedded comments. However, it is worth noting thatunlike the previous module, Listing 1 instantiates a new empty object of the class Animation and saves its reference in the instance variable named animation . This object will be populated with images by the init method later.

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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