Programming Assignment5-Game1.cs

using System;
using System.Collections.Generic;

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;

using TeddyMineExplosion;

namespace ProgrammingAssignment5
{
    /// <summary>
    /// This is the main type for your game.
    /// </summary>
    public class Game1 : Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;

        const int windowWidth = 800;
        const int windowHeight = 600;

        const double lowN = -0.5;
        const double highN = 0.5;

        // game world objects and characters
        Texture2D teddySprite;
        List<TeddyBear> bearList = new List<TeddyBear>();

        Texture2D mineSprite;
        List<Mine> mineList = new List<Mine>();

        Texture2D explosionSprite;
        List<Explosion> explosionList = new List<Explosion>();

        // spawning support
        Random rand = new Random();

        int elapsedSpawnDelayMilliseconds = 0;
        int totalSpawnDelayMilliseconds = 1;

        // mouse matters
        bool leftClickStarted = false;
        bool leftButtonReleased = true;

        public Game1()
        {
            if (elapsedSpawnDelayMilliseconds==0)
            {
                int number = rand.Next(1, 4);
                totalSpawnDelayMilliseconds = number * 1000;
            }

            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";

            graphics.PreferredBackBufferWidth = windowWidth;
            graphics.PreferredBackBufferHeight = windowHeight;

            IsMouseVisible = true;
        }

        /// <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

            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);

            // TODO: use this.Content to load your game content here
            mineSprite = Content.Load<Texture2D>(@"graphics/mine");
            teddySprite = Content.Load<Texture2D>(@"graphics/teddybear");
            explosionSprite = Content.Load<Texture2D>(@"graphics/explosion");
        }

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// game-specific 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)
        {
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
                Exit();

            // TODO: Add your update logic here
            elapsedSpawnDelayMilliseconds += gameTime.ElapsedGameTime.Milliseconds;
            MouseState mouse = Mouse.GetState();

            //check mouse click status
            if (mouse.LeftButton == ButtonState.Pressed && leftButtonReleased)
            {
                leftClickStarted = true;
                leftButtonReleased = false;
            }
            else if(mouse.LeftButton==ButtonState.Released)
            {
                leftButtonReleased = true;

                if (leftClickStarted)
                {
                    leftClickStarted = false;
                    mineList.Add(new Mine(mineSprite, mouse.X, mouse.Y));
                }
            }
            // do the bear things
            if (elapsedSpawnDelayMilliseconds>=totalSpawnDelayMilliseconds)
            {
                Vector2 velocity = new Vector2(rand.Next(-5, 5) * 0.1f, rand.Next(-5, 5) * 0.1f);
                TeddyBear teddy = new TeddyBear(teddySprite, velocity, windowWidth, windowHeight);

                bearList.Add(teddy);

                elapsedSpawnDelayMilliseconds = 0;
                int number = rand.Next(1, 4);
                totalSpawnDelayMilliseconds = number * 1000;
            }
            foreach (TeddyBear bear in bearList)
            {
                bear.Update(gameTime);
            }
            foreach(TeddyBear bear in bearList)
            {
                foreach (Mine mine in mineList)
                {
                    if (bear.Active && mine.Active &&
                        bear.CollisionRectangle.Intersects(mine.CollisionRectangle))
                    {
                        bear.Active = false;
                        mine.Active = false;
                        explosionList.Add(new Explosion(explosionSprite,
                            mine.CollisionRectangle.Center.X, mine.CollisionRectangle.Center.Y));
                    }
                }
            }
            foreach (Explosion explosion in explosionList)
            {
                explosion.Update(gameTime);
            }
            for (int i = bearList.Count-1; i>=0; i--)
            {
                if (!bearList[i].Active)
                {
                    bearList.RemoveAt(i);
                }
            }
            for (int i = mineList.Count - 1; i >= 0; i--)
            {
                if (!mineList[i].Active)
                {
                    mineList.RemoveAt(i);
                }
            }
            for (int i = explosionList.Count - 1; i >= 0; i--)
            {
                if (!explosionList[i].Playing)
                {
                    explosionList.RemoveAt(i);
                }
            }
            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
            spriteBatch.Begin();

            // DRAW MINES, TEDDIES and EXPLOSIONS to screen
            foreach(Mine mine in mineList)
            {
                mine.Draw(spriteBatch);
            }
            foreach(TeddyBear bear in bearList)
            {
                bear.Draw(spriteBatch);
            }
            foreach (Explosion explosion in explosionList)
            {
                explosion.Draw(spriteBatch);
            }

            spriteBatch.End();


            base.Draw(gameTime);
        }


    }
}