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There is nothing unusual about the code that was added to the Move method, so it shouldn't require further explanation beyond the embedded comments.

End of discussion of the Sprite class

There were no additional changes made to the Sprite class other than those identified above, so that will end the discussion of the Sprite class.

The Game1 class for XNA0132Proj

General information

This project demonstrates how to write a simple 2D arcade style game.

Ten spiders try to make it from the top to the bottom of a spider web.

The bottom of the web is guarded by two large ladybugs that are intent on eating the spiders.

If a ladybug collides with a spider, the spider gets eaten by the ladybug and removed from the population of spiders. If the player plays long enough, all ofthe spiders should eventually be eaten.

The objective of the game

The objective of the game is for the player to cause as many spiders as possible to be eaten by the ladybugs before they make it to the bottom of thegame window.

Ladybug control

The ladybugs can be moved by the player using either the keyboard or the mouse. Pressing the arrow keys moves one of the ladybugs. Holding down the A keyand pressing the arrow keys moves the other ladybug.

The player can drag one of the ladybugs with the mouse pointer by pressing the left mouse button. The player can drag the other ladybug by pressing theright mouse button.

Spiders are recycled

Even though the game begins with only ten spiders, those that are not eaten before they reach the bottom of the game window are recycled. If a spider makesit from the top to the bottom of the game window without being eaten, the spider wraps around and appears back at the top of the game window ready to start thetrip over.

Keeping score

A counter keeps track of the number of spiders that cross the bottom of the game window. On-screen text displays that number as the game progresses as shownin Figure 1 . Note, however, that if two or more spiders cross the bottom edge of the game window during the same iteration of the game loop, only one will becounted. In hindsight, therefore, the elapsed time required to cause the ladybugs to eat all of the spiders might be a better scorekeeping mechanism thancounting spider crossings.

Modifying the program to keep score on the basis of elapsed time might make a good student project.

Code for the Game1 Class

Listing 6 shows the beginning of the Game1 class along with the constructor in abbreviated form. By abbreviated form, I mean that much ofthe code is very similar to code that I have explained in earlier modules so I deleted that code from Listing 6 for brevity. You can view all of the code for the Game1 class in Listing 14 .

Listing 6 . Abbreviated beginning of the Game1 Class for the XNA0132Proj project.

namespace XNA0132Proj { public class Game1 : Microsoft.Xna.Framework.Game {GraphicsDeviceManager graphics; SpriteBatch spriteBatch;//code deleted for brevity //The following variable is used to count the number// of spiders that make it past the ladybugs and // reach the bottom of the game window.int spiderCount = 0; SpriteFont Font1;//font for on-screen textVector2 FontPos;//position of on-screen text //-------------------------------------------------//public Game1() {//constructor //code deleted for brevity}//end constructor

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
is it a question of log
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris 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?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele 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, Xna game studio. OpenStax CNX. Feb 28, 2014 Download for free at https://legacy.cnx.org/content/col11634/1.6
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