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Figure 4 . Cropped upper-left corner of the game window without honoring alpha transparency.

Missing image

Honoring alpha transparency is the default in XNA 4.0. Figure 4 was created by setting the Premultiply Alpha property (see Figure 7 ) of the image named gorightarrow.png to a value of False and then re-running the program.

Not a very exciting program

This program isn't very exciting because there is no motion and no sound. The program simply draws the same image in the same position during every iterationof the game loop. Despite that, this program will give us the opportunity to drill down into the technical aspects of several areas of the XNA framework.

Discussion and sample code

Creating a new Windows Game project

Before getting into the details of the code, I'm going to walk you through the steps involved in creating this Windows Game project using XNA.

Step 1: Create a new Windows Game project named XNA0118Proj

Pull down the Visual C# File menu and select New Project as shown in Figure 5 .

Figure 5 . Select New Project on the Visual C# File menu.

Missing image

Select a Windows Game project

Select XNA Game Studio 4.0 in the left pane of the New Project dialog. Select the Windows Game (4.0) icon and enter the name of your project in the Name field. Enter the storage location in the Location field and click the OK button that is off screen further to the right in Figure 6 .

Figure 6 . Select a Windows Game project.

Missing image

Step 2: Add your image file to the Content folder

If necessary, pull down the View menu and select Other Windows . Then select Solution Explorer and/or Properties Window so that they are exposed on the right side of the IDE as shown in Figure 7 . (Note that the initial view of the Properties window is different from that shown in Figure 7 .)

Figure 7 . Solutions explorer and properties window exposed.

Missing image

Add your image to the Content folder

Assuming that your project is named XNA0118proj , right click on the XNA0118projContent (Content) folder in the Solution Explorer . Select Add/Existing Item in the dialog that follows. Browse to the image file that you are going to use and click the Add button. A copy of the image file should appear in the Content folder.

The Asset Name

Click the image file name in the Content folder and the information in the Properties Window should change to describe that file. Note the value of the Asset Name property in the Properties Window . You will need it later. (In this example, the value of the Asset Name in Figure 7 is gorightarrow .)

Steps 3, 4, and 5: Write code

The next three steps involve writing code to upgrade the skeleton version of the class definition of the Game1 class. I will explain that new code later. For now, the three steps for this example program are:

  • Declare two instance variables named myTexture and spritePosition .
  • Add a statement to the LoadContent method to load the image.
  • Add statements to the Draw method to cause the image to be drawn in the game window.

Modify two overridden methods

As you saw in Listing 3 , there are five overridden methods in the class definition for the Game1 class that you can modify to customize the class for your game. This program modifies only two of those methods:

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
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..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
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.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
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
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Xna game studio. OpenStax CNX. Feb 28, 2014 Download for free at https://legacy.cnx.org/content/col11634/1.6
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