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+using Microsoft.Xna.Framework;
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+using Microsoft.Xna.Framework.Graphics;
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+using Microsoft.Xna.Framework.Input;
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+using System;
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+using System.Runtime.Intrinsics.Arm;
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+
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+namespace AutoPong.DesktopGL
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+{
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+ public class AutoPongGame : Game
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+ {
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+ private GraphicsDeviceManager _graphics;
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+ private SpriteBatch _spriteBatch;
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+ private Point GameBounds = new Point(1280, 720); //window resolution
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+
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+ private Rectangle PaddleLeft;
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+ private Rectangle PaddleRight;
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+
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+ private Rectangle Ball;
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+ private Vector2 BallVelocity;
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+ private Vector2 BallPosition;
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+ private float BallSpeed = 15.0f;
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+
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+ public Texture2D Texture;
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+ private Rectangle DrawRec = new Rectangle(0, 0, 3, 3);
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+
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+ private Random Rand = new Random();
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+ private byte HitCounter = 0;
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+
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+ private int PointsLeft;
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+ private int PointsRight;
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+ private int PointsPerGame = 4;
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+
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+ private AudioSource SoundFX;
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+ private int JingleCounter = 0;
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+
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+ public AutoPongGame()
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+ {
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+ _graphics = new GraphicsDeviceManager(this);
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+ Content.RootDirectory = "Content";
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+ IsMouseVisible = true;
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+ _graphics.PreferredBackBufferWidth = GameBounds.X;
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+ _graphics.PreferredBackBufferHeight = GameBounds.Y;
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+ }
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+
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+ protected override void LoadContent()
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+ {
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+ _spriteBatch = new SpriteBatch(GraphicsDevice);
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+
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+ Reset();
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+ }
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+
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+ protected override void Update(GameTime gameTime)
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+ {
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+#if !__IOS__
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+ if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
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+ Exit();
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+#endif
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+ #region Update Ball
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+
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+ //limit how fast ball can move each frame
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+ float maxVelocity = 1.5f;
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+ if (BallVelocity.X > maxVelocity) { BallVelocity.X = maxVelocity; }
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+ else if (BallVelocity.X < -maxVelocity) { BallVelocity.X = -maxVelocity; }
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+ if (BallVelocity.Y > maxVelocity) { BallVelocity.Y = maxVelocity; }
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+ else if (BallVelocity.Y < -maxVelocity) { BallVelocity.Y = -maxVelocity; }
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+
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+ //apply velocity to position
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+ BallPosition.X += BallVelocity.X * BallSpeed;
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+ BallPosition.Y += BallVelocity.Y * BallSpeed;
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+
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+ //check for collision with paddles
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+ HitCounter++;
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+ if (HitCounter > 10)
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+ {
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+ if (PaddleLeft.Intersects(Ball))
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+ {
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+ BallVelocity.X *= -1;
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+ BallVelocity.Y *= 1.1f;
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+ HitCounter = 0;
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+ BallPosition.X = PaddleLeft.X + PaddleLeft.Width + 10;
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+ SoundFX.PlayWave(220.0f, 50, WaveType.Sin, 0.3f);
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+ }
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+ if (PaddleRight.Intersects(Ball))
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+ {
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+ BallVelocity.X *= -1;
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+ BallVelocity.Y *= 1.1f;
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+ HitCounter = 0;
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+ BallPosition.X = PaddleRight.X - 10;
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+ SoundFX.PlayWave(220.0f, 50, WaveType.Sin, 0.3f);
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+ }
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+ }
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+
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+ //bounce on screen
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+ if (BallPosition.X < 0) //point for right
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+ {
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+ BallPosition.X = 1;
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+ BallVelocity.X *= -1;
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+ PointsRight++;
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+ SoundFX.PlayWave(440.0f, 50, WaveType.Square, 0.3f);
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+ }
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+ else if (BallPosition.X > GameBounds.X) //point for left
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+ {
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+ BallPosition.X = GameBounds.X - 1;
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+ BallVelocity.X *= -1;
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+ PointsLeft++;
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+ SoundFX.PlayWave(440.0f, 50, WaveType.Square, 0.3f);
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+ }
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+
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+ if (BallPosition.Y < 0 + 10) //limit to minimum Y pos
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+ {
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+ BallPosition.Y = 10 + 1;
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+ BallVelocity.Y *= -(1 + Rand.Next(-100, 101) * 0.005f);
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+ }
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+ else if (BallPosition.Y > GameBounds.Y - 10) //limit to maximum Y pos
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+ {
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+ BallPosition.Y = GameBounds.Y - 11;
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+ BallVelocity.Y *= -(1 + Rand.Next(-100, 101) * 0.005f);
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+ }
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+
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+ #endregion
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+
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+ #region Simulate Left Paddle Input
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+ { //simple ai, not very good, moves random amount each frame
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+ int amount = Rand.Next(0, 6);
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+ int Paddle_Center = PaddleLeft.Y + PaddleLeft.Height / 2;
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+ if (Paddle_Center < BallPosition.Y - 20) { PaddleLeft.Y += amount; }
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+ else if (Paddle_Center > BallPosition.Y + 20) { PaddleLeft.Y -= amount; }
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+ LimitPaddle(ref PaddleLeft);
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+ }
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+ #endregion Simulate Left Paddle Input
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+
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+ #region Simulate Right Paddle Input
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+ { //simple ai, better than left, moves % each frame
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+ int Paddle_Center = PaddleRight.Y + PaddleRight.Height / 2;
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+ if (Paddle_Center < BallPosition.Y - 20)
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+ { PaddleRight.Y -= (int)((Paddle_Center - BallPosition.Y) * 0.08f); }
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+ else if (Paddle_Center > BallPosition.Y + 20)
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+ { PaddleRight.Y += (int)((BallPosition.Y - Paddle_Center) * 0.08f); }
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+ LimitPaddle(ref PaddleRight);
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+ }
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+ #endregion Simulate Right Paddle Input
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+
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+ #region Check Win
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+ //Check for win condition, reset
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+ if (PointsLeft >= PointsPerGame) { Reset(); }
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+ else if (PointsRight >= PointsPerGame) { Reset(); }
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+ #endregion Check Win
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+
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+ #region Play Reset Jingle
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+ //use jingle counter as a timeline to play notes
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+ JingleCounter++;
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+
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+ int speed = 7;
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+ if (JingleCounter == speed * 1) { SoundFX.PlayWave(440.0f, 100, WaveType.Sin, 0.2f); }
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+ else if (JingleCounter == speed * 2) { SoundFX.PlayWave(523.25f, 100, WaveType.Sin, 0.2f); }
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+ else if (JingleCounter == speed * 3) { SoundFX.PlayWave(659.25f, 100, WaveType.Sin, 0.2f); }
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+ else if (JingleCounter == speed * 4) { SoundFX.PlayWave(783.99f, 100, WaveType.Sin, 0.2f); }
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+ //only play this jingle once
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+ else if (JingleCounter > speed * 4) { JingleCounter = int.MaxValue - 1; }
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+ #endregion Play Reset Jingle
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+
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+ base.Update(gameTime);
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+ }
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+
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+ protected override void Draw(GameTime gameTime)
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+ {
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+ GraphicsDevice.Clear(Color.CornflowerBlue);
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+
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+ _spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.PointClamp);
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+
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+ //draw dots down center
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+ int total = GameBounds.Y / 20;
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+ for (int i = 0; i < total; i++)
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+ {
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+ DrawRectangle(_spriteBatch, new Rectangle(GameBounds.X / 2 - 4, 5 + (i * 20), 8, 8), Color.White * 0.2f);
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+ }
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+
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+ //draw paddles
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+ DrawRectangle(_spriteBatch, PaddleLeft, Color.White);
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+ DrawRectangle(_spriteBatch, PaddleRight, Color.White);
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+
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+ //draw ball
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+ Ball.X = (int)BallPosition.X;
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+ Ball.Y = (int)BallPosition.Y;
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+ DrawRectangle(_spriteBatch, Ball, Color.White);
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+
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+ //draw current game points
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+ for (int i = 0; i < PointsLeft; i++)
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+ {
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+ DrawRectangle(_spriteBatch, new Rectangle((GameBounds.X / 2 - 25) - i * 12, 10, 10, 10), Color.White * 1.0f);
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+ }
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+ for (int i = 0; i < PointsRight; i++)
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+ {
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+ DrawRectangle(_spriteBatch, new Rectangle((GameBounds.X / 2 + 15) + i * 12, 10, 10, 10), Color.White * 1.0f);
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+ }
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+
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+ _spriteBatch.End();
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+
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+ base.Draw(gameTime);
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+ }
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+
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+ private void DrawRectangle(SpriteBatch sb, Rectangle Rec, Color color)
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+ {
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+ Vector2 pos = new Vector2(Rec.X, Rec.Y);
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+ sb.Draw(Texture, pos, Rec,
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+ color * 1.0f,
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+ 0, Vector2.Zero, 1.0f,
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+ SpriteEffects.None, 0.00001f);
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+ }
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+
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+ private void LimitPaddle(ref Rectangle Paddle)
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+ {
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+ //limit how far paddles can travel on Y axis so they dont exceed top or bottom
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+ if (Paddle.Y < 10) { Paddle.Y = 10; }
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+ else if (Paddle.Y + Paddle.Height > GameBounds.Y - 10)
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+ { Paddle.Y = GameBounds.Y - 10 - Paddle.Height; }
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+ }
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+
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+ private void Reset()
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+ {
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+ if (Texture == null)
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+ { //create texture to draw with if it does not exist
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+ Texture = new Texture2D(_graphics.GraphicsDevice, 1, 1);
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+ Texture.SetData<Color>(new Color[] { Color.White });
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+ }
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+
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+ int PaddleHeight = 100;
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+ PaddleLeft = new Rectangle(0 + 10, 150, 20, PaddleHeight);
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+ PaddleRight = new Rectangle(GameBounds.X - 30, 150, 20, PaddleHeight);
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+
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+ BallPosition = new Vector2(GameBounds.X / 2, 200);
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+ Ball = new Rectangle((int)BallPosition.X, (int)BallPosition.Y, 10, 10);
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+ BallVelocity = new Vector2(1, 0.1f);
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+
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+ PointsLeft = 0; PointsRight = 0;
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+ JingleCounter = 0;
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+
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+ //setup sound sources
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+ if (SoundFX == null)
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+ {
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+ SoundFX = new AudioSource();
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+ }
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+ }
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+ }
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+}
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Simon Jackson
