{
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
GraphicsDeviceManager graphics;
Texture2D backgroundTexture;
Rectangle viewportRect;
SpriteBatch spriteBatch;
GameObject cannon;
const int maxCannonBalls = 5;
GameObject[] cannonBalls;
GamePadState previousGamePadState = GamePad.GetState(PlayerIndex.One);
KeyboardState previousKeyboardState = Keyboard.GetState();
const int maxEnemies = 20;
const float maxEnemyHeight = 1.0f;
const float minEnemyHeight = 0.1f;
const float maxEnemyVelocity = 20.0f;
const float minEnemyVelocity = 1.0f;
Random random = new Random();
GameObject[] enemies;
int score;
SpriteFont font;
Vector2 scoreDrawPoint = new Vector2(0.1f, 0.1f);
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
base.Initialize();
}
/// <summary>
/// Load your graphics content
/// </summary>
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(graphics.GraphicsDevice);
backgroundTexture =
Content.Load<Texture2D>("Sprites\\background");
cannon = new GameObject(Content.Load<Texture2D>("Sprites\\cannon"));
cannon.position = new Vector2(350, graphics.GraphicsDevice.Viewport.Height -50);
cannonBalls = new GameObject[maxCannonBalls];
for (int i = 0; i < maxCannonBalls; i++)
{
cannonBalls[i] = new GameObject(Content.Load<Texture2D>(
"Sprites\\cannonball"));
}
enemies = new GameObject[maxEnemies];
for (int i = 0; i < maxEnemies; i++)
{
enemies[i] = new GameObject(
Content.Load<Texture2D>("Sprites\\enemy"));
}
font = Content.Load<SpriteFont>("Fonts\\GameFont");
//drawable area of the game screen.
viewportRect = new Rectangle(0, 0,
graphics.GraphicsDevice.Viewport.Width,
graphics.GraphicsDevice.Viewport.Height);
base.LoadContent();
}
public void UpdateCannonBalls()
{
foreach (GameObject ball in cannonBalls)
{
if (ball.alive)
{
ball.position += ball.velocity;
if (!viewportRect.Contains(new Point(
(int)ball.position.X,
(int)ball.position.Y)))
{
ball.alive = false;
continue;
}
Rectangle cannonBallRect = new Rectangle(
(int)ball.position.X,
(int)ball.position.Y,
ball.sprite.Width,
ball.sprite.Height);
foreach (GameObject enemy in enemies)
{
Rectangle enemyRect = new Rectangle(
(int)enemy.position.X,
(int)enemy.position.Y,
enemy.sprite.Width,
enemy.sprite.Height);
if (cannonBallRect.Intersects(enemyRect))
{
ball.alive = false;
enemy.alive = false;
score += 1;
break;
}
}
}
}
}
/// <summary>
/// Unload any content not managed by the Content Manager
/// </summary>
protected override void UnloadContent()
{
base.UnloadContent();
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
GamePadState gamePadState = GamePad.GetState(PlayerIndex.One);
cannon.rotation += gamePadState.ThumbSticks.Left.X * 0.1f;
if (gamePadState.Buttons.A == ButtonState.Pressed &&
previousGamePadState.Buttons.A == ButtonState.Released)
{
FireCannonBall();
