<< Chapter < Page
  Xna game studio     Page 10 / 12
Chapter >> Page >

The first two parameters

The first two parameters that identify the sprite sheet and the position at which to draw the image are the same as the version that I explained in anearlier module.

Three interesting parameters

Three of the parameters shown in the above list and in Listing 12 are parameters that are new to this module and in which I have an interest.

The remaining four parameters

Four of the parameters shown in the above list and in Listing 12 are new to this module, but I don't have any interest in them. The program simply passes "harmless" values to them.

The rectangle

The first thing that is new to this module in Listing 12 is the passing of a new object of type Rectangle as the third parameter.

With this version of the Draw method, only the contents of the sprite sheet that fall within that rectangle are drawn. The size andposition of the rectangle are specified with:

  • The coordinates of the upper left corner of the rectangle
  • The width and the height of the rectangle

The upper left corner of the rectangle

The upper left corner of the rectangle is specified in Listing 12 by the contents of the variables named xStart and yStart . The values in these two variables were assigned in Listing 5 . They specify the coordinates of the upper left corner of a small rectangle that contains one ofthe sprite images shown in Figure 1 .

The width and the height of the rectangle

The width and the height are specified by the contents of the variables named frameWidth and frameHeight . The values in these two variables were assigned in Listing 3 as the width and height of the small rectangle that contains one of the sprite images in Figure 1 .

The horizontal and vertical scale factors

The seventh parameter requires a Vector2D object containing the scale factors to be applied to the horizontal and vertical sizes of thesprite before it is drawn. (You learned about the Vector2D class in an earlier module.)

A new object

Listing 12 instantiates a new object of the Vector2D class that encapsulates the value stored in the variable named scale for the horizontal and vertical scale factors.

A value of 4 was assigned to the variable named scale when it was initialized in Listing 1 .

Four times larger

Therefore, the sprite images that are drawn in the game window are actually four times larger than the sprite images in the sprite sheet shown in Figure 1 . ( Note that the images were also scaled in Figure 1 for display purposes in order to make them more visible. You need to take that into account if you downloadthe sprite sheet and use it to replicate this program.)

Causing the sprite to face in the correct direction

The eighth parameter to the Draw method in Listing 12 requires an object of type SpriteEffects . The contents of the variable named spriteEffect are passed as this parameter. The contents of this variable were set to one of the following two values by thecode in Listing 9 :

  • noEffect - SpriteEffects.None
  • flipEffect - SpriteEffects.FlipHorizontally

The purpose of this parameter is to cause the sprite to face in the correct direction.

Questions & Answers

how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
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
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Xna game studio. OpenStax CNX. Feb 28, 2014 Download for free at https://legacy.cnx.org/content/col11634/1.6
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Xna game studio' conversation and receive update notifications?

Ask