source: 2014/30/MikkoI/WindowsGame1/WindowsGame1/WindowsGame1/Game1.cs @ 5558

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace WindowsGame1
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Pikseli : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        //ContentManager contentManager;
        SpriteBatch spriteBatch;
        Texture2D texture;
        Vector2 screenSize = new Vector2(1920, 1080);
        MouseState currentMouseState;
        MouseState previousMouseState;
        Vector2 mapSize = new Vector2(40, 40);
        Random random;
        Camera camera;
        MapRenderer mapRenderer;

        BasicEffect effect;

        public Pikseli()
        {
            graphics = new GraphicsDeviceManager(this);
            graphics.PreferredBackBufferWidth = (int)screenSize.X;
            graphics.PreferredBackBufferHeight = (int)screenSize.Y;
            //graphics.IsFullScreen = true;
            //contentManager = new ContentManager();
            Content.RootDirectory = "Content";
            currentMouseState = new MouseState();
        }

        /// <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
            random = new Random();
            camera = new Camera();
            //siirrä kamera keskelle
            camera.offset = screenSize / 2;
            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);
            mapRenderer = new MapRenderer(spriteBatch);

            effect = new BasicEffect(GraphicsDevice);

            texture = Content.Load<Texture2D>("Graphics/Test/taso5.1");

            // TODO: use this.Content to load your game content here
        }

        /// <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)
        {
            // Allows the game to exit
            if (Keyboard.GetState(PlayerIndex.One).IsKeyDown(Keys.Escape))
                this.Exit();

            // TODO: Add your update logic here

            currentMouseState = Mouse.GetState();

            int erotus = currentMouseState.ScrollWheelValue - previousMouseState.ScrollWheelValue;
            if (erotus > 0)
            {
                camera.zoomFactor *= 1.2f;
            }
            else if (erotus < 0)
            {
                camera.zoomFactor /= 1.2f;
            }
            previousMouseState = currentMouseState;

            if (Keyboard.GetState(PlayerIndex.One).IsKeyDown(Keys.Down))
            {
                camera.yaw += 0.6f;
            }
            else if (Keyboard.GetState(PlayerIndex.One).IsKeyDown(Keys.Up))
            {
                camera.yaw -= 0.6f;
            }

            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.Gray);



            // TODO: Add your drawing code here
            Matrix matrix = camera.getMatrix(new Vector2(texture.Width, texture.Height), mapSize);
            Vector2 size = new Vector2(texture.Width, texture.Height) * camera.zoomFactor;

            spriteBatch.Begin(SpriteSortMode.Deferred, null, null, null, null, null, matrix);
            for (var x = 0; x < mapSize.X; x++)
            {
                for (var y = 0; y < mapSize.Y; y++)
                {
                    mapRenderer.renderGroundTile(texture,x,y);
                }
            }
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}