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Listing 7 . Beginning of the overridden LoadContent method of the Game1 class.

protected override void LoadContent() { spriteBatch = new SpriteBatch(GraphicsDevice);//Create a sprite for the background image. spiderWeb =new Sprite("spiderwebB",Content,random); spiderWeb.Position = new Vector2(0f,0f);

A background sprite with a spider web image

The last two statements in Listing 7 instantiate a new Sprite object and load it with an image of the spider web shown in Figure 1 .

The purpose of this sprite is to serve as a background image. Before adding the image of the spider web to the Content folder during the design phase, I used an external program to scale the image to the same size asthe game window established by the constructor in Listing 15 .

The code in Listing 7 positions the upper left corner of the sprite at the upper left corner of the game window so that it just fills the game window asshown in Figure 1 .

Instantiate the spider and ladybug Sprite objects

The code in Listing 8 instantiates all of the spider and ladybug Sprite objects and sets their properties.

Listing 8 . Instantiate the spider and ladybug Sprite objects.

//Instantiate all of the spiders and cause them to // move from left to right, top to// bottom. Pass a reference to the same Random // object to all of the sprites.for(int cnt = 0;cnt<numSpiders;cnt++) { spiders.Add(new Sprite("blackWidowSpider",Content,random)); //Set the position of the current spider at a// random location within the game window. spiders[cnt].Position = new Vector2( (float)(windowWidth * random.NextDouble()),(float)(windowHeight * random.NextDouble())); //Get a direction vector for the current spider.// Make both components positive to cause the // vector to point down and to the right.spiders[cnt].Direction = DirectionVector((float)maxVectorLength, (float)(maxVectorLength * random.NextDouble()),false,//xNeg false);//yNeg//Notify the spider object of the size of the // game window.spiders[cnt].WindowSize =new Point(windowWidth,windowHeight); //Set the speed in moves per second for the// current spider to a random value between // maxSpiderSpeed/2 and maxSpiderSpeed.spiders[cnt].Speed = maxSpiderSpeed / 2+ maxSpiderSpeed * random.NextDouble() / 2; }//end for loop//Use the same process to instantiate all of the // ladybugs and cause them to move from right to// left, bottom to top. for(int cnt = 0;cnt<numLadybugs;cnt++) { ladybugs.Add(new Sprite("ladybug",Content,random)); ladybugs[cnt].Position = new Vector2( (float)(windowWidth * random.NextDouble()),(float)(windowHeight * random.NextDouble())); ladybugs[cnt].Direction = DirectionVector( (float)maxVectorLength,(float)(maxVectorLength * random.NextDouble()), true,//xNegtrue);//yNeg ladybugs[cnt].WindowSize = new Point(windowWidth,windowHeight);ladybugs[cnt].Speed = maxLadybugSpeed / 2+ maxLadybugSpeed * random.NextDouble() / 2; }//end for loop}//end LoadContent

Questions & Answers

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.
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
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
characteristics of micro business
for teaching engĺish at school how nano technology help us
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
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
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.
what is the actual application of fullerenes nowadays?
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.
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.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
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