Help Collision Detection XnA 4.0 C# (Noob Programmer)
{
/// <summary>
/// Alan Carstairs
/// 26/9/14
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
GraphicsDeviceManager graphics;
SpriteBatch spriteBatch;
int DisplayWidth;
int DisplayHeight;
const float speed = 2.4f; //speed of image
int PlayerScore = 0; //
//structure for 2D graphics
struct graphic2D
{
public Texture2D image;
public Rectangle rect;
}
//structure for moving 2D graphics
struct sprite2D
{
public Texture2D image; //Texture to hold the image
public Vector3 position; //Position on screen
public Rectangle rect; //Size & position
public Vector2 origin; //Center point
public float size; //Size ratio
public float rotation;//Amount of rotation
public Vector3 velocity; //Sprite speed and direction
public float thrust; //Amount of thrust applied
public BoundingSphere bsphere;//Bounding sphere
//public int spriteNum = 1;
//public int maxSpriteNum;
//public bool alive;
//public Enemy(Texture2D Texture, Vector3 position, Vector3 velocity,
}
sprite2D Sprite, Sprite2;
graphic2D BackGround;
Boolean GameOver;
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()
{
// TODO: Add your initialization logic here
DisplayWidth = graphics.GraphicsDevice.Viewport.Width;
DisplayHeight = graphics.GraphicsDevice.Viewport.Height;
base.Initialize();
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
//Load BackGround
BackGround.image = Content.Load<Texture2D>("fullmoon");
// work out the ratio for image depending on screen size
float ratio = ((float)DisplayWidth / BackGround.image.Width);
BackGround.rect.Width = DisplayWidth;
BackGround.rect.Height = (int)(BackGround.image.Height * ratio);
BackGround.rect.X = 0;
BackGround.rect.Y = (DisplayHeight - BackGround.rect.Height) / 2;
//Sprite
Sprite.image = Content.Load<Texture2D>("raptor");
//Sprite2
Sprite2.image = Content.Load<Texture2D>("raptor2");
reset();
// TODO: use this.Content to load your game content here
}
void reset()
{
//sprite
// Set initial position
Sprite.position = new Vector3(DisplayWidth / 2, DisplayHeight / 2, 0);
Sprite.size = 0.2f; // set size of sprite
Sprite.origin.X = Sprite.image.Width / 2;
Sprite.origin.Y = Sprite.image.Height / 2;
Sprite.rect.Width = (int)(Sprite.image.Width * Sprite.size);
Sprite.rect.Height = (int)(Sprite.image.Height * Sprite.size);
Sprite.rotation = 0;//speed of rotation
//sprite2
// Set initial position
Sprite2.position = new Vector3(DisplayWidth / 2, DisplayHeight / 4, 0);
Sprite2.size = 0.2f; // set size of sprite
Sprite2.origin.X = Sprite2.image.Width / 2;
Sprite2.origin.Y = Sprite2.image.Height / 2;
Sprite2.rect.Width = (int)(Sprite2.image.Width * Sprite2.size);
Sprite2.rect.Height = (int)(Sprite2.image.Height * Sprite2.size);
Sprite2.rotation = 0;//speed of rotation
GameOver = false;
}
/// <summary>
/// UnloadContent will be called once per game and is the place to unload
/// all content.
/// </summary>
protected override void UnloadContent()
{
// TODO: Unload any non ContentManager content here
}
/// <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)
{
GamePadState pad_P1 = GamePad.GetState(PlayerIndex.One);//reads gamepad 1
KeyboardState keys = Keyboard.GetState(); // reads keyboard
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
if (!GameOver)
{
//collision detection
if (Sprite.bsphere.Intersects(Sprite2.bsphere))
{
Sprite.image = null;
PlayerScore++;// increase Points
}
//Display score in top lefthand side of the screen
this.Window.Title = "Score: " + PlayerScore.ToString();
//sprite
Sprite.thrust = (speed * (pad_P1.Triggers.Right + 2));// calculate the amount of thrust based on speen and right trigger
Sprite.velocity.X = pad_P1.ThumbSticks.Right.X;
Sprite.velocity.Y = -pad_P1.ThumbSticks.Right.Y;
Sprite.velocity *= Sprite.thrust;//multi velocity from the thumb stick
Sprite.position += Sprite.velocity; //add current velocity to pos of thr
// check if ball hits any of the four sides and bounce it off them
if ((Sprite.position.X + Sprite.rect.Width / 2) >= DisplayWidth) //RHS
Sprite.position.X = DisplayWidth - (Sprite.rect.Width / 2);
if ((Sprite.position.X - Sprite.rect.Width / 2) <= 0)//LHS
Sprite.position.X = (Sprite.rect.Width / 2);
if ((Sprite.position.Y + Sprite.rect.Height / 2) >= DisplayHeight) //bottom
Sprite.position.Y = DisplayHeight - (Sprite.rect.Height / 2);
if ((Sprite.position.Y - Sprite.rect.Height / 2) <= 0) //Top
Sprite.position.Y = (Sprite.rect.Height / 2);
// set position of Sprite into the rectangle from the position property
Sprite.rect.X = (int)Sprite.position.X;
Sprite.rect.Y = (int)Sprite.position.Y;
//set bounding sphere
Sprite.bsphere = new BoundingSphere(Sprite.position, Sprite.rect.Width / 2);
//sprite2
Sprite2.thrust = speed * (pad_P1.Triggers.Left + 2);// calculate the amount of thrust based on speen and right trigger
Sprite2.velocity.X = pad_P1.ThumbSticks.Left.X;
Sprite2.velocity.Y = -pad_P1.ThumbSticks.Left.Y;
Sprite2.velocity *= Sprite2.thrust;//multi velocity from the thumb stick
Sprite2.position += Sprite2.velocity; //add current velocity to pos of thr
// check if ball hits any of the four sides and bounce it off them
if ((Sprite2.position.X + Sprite2.rect.Width / 2) >= DisplayWidth) //RHS
Sprite2.position.X = DisplayWidth - (Sprite2.rect.Width / 2);
if ((Sprite2.position.X - Sprite2.rect.Width / 2) <= 0)//LHS
Sprite2.position.X = (Sprite2.rect.Width / 2);
if ((Sprite2.position.Y + Sprite2.rect.Height / 2) >= DisplayHeight) //bottom
Sprite2.position.Y = DisplayHeight - (Sprite2.rect.Height / 2);
if ((Sprite2.position.Y - Sprite2.rect.Height / 2) <= 0) //Top
Sprite2.position.Y = (Sprite2.rect.Height / 2);
// set position of Sprite into the rectangle from the position property
Sprite2.rect.X = (int)Sprite2.position.X;
Sprite2.rect.Y = (int)Sprite2.position.Y;
//set bounding sphere
Sprite2.bsphere = new BoundingSphere(Sprite2.position, Sprite2.rect.Width / 2);
// user presses X game is over
if (pad_P1.Buttons.X == ButtonState.Pressed) GameOver = true;
}
else
{
if (pad_P1.Buttons.Start == ButtonState.Pressed || keys.IsKeyDown(Keys.Enter))
reset();
}
// TODO: Add your update logic here
base.Update(gameTime);
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
// TODO: Add your drawing code here
//Draw ship
spriteBatch.Begin();
spriteBatch.Draw(BackGround.image, BackGround.rect, Color.White);
//sprite
spriteBatch.Draw(Sprite.image, Sprite.rect, null, Color.DarkSeaGreen, Sprite.rotation, Sprite.origin, SpriteEffects.None, 0);
//sprite2
spriteBatch.Draw(Sprite2.image, Sprite2.rect, null, Color.DarkSlateBlue, Sprite2.rotation, Sprite2.origin, SpriteEffects.None, 0);
spriteBatch.End();
base.Draw(gameTime);
}
}
}