source: 2011/23/sijoseha/SpaceWorld/SpaceWorld/SpaceWorld/Game1.cs @ 2044

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 SpaceWorld
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        GraphicsDevice device;
        SpriteBatch spriteBatch;

        List<WorldPoint> points;
        //WorldPoint point, point2, point3, point4;
        BasicEffect effect;

        Matrix viewMatrix, projectionMatrix;

        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
            IsMouseVisible = true;
            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.
            device = graphics.GraphicsDevice;
            spriteBatch = new SpriteBatch(GraphicsDevice);

            effect = new BasicEffect(device);

            points = new List<WorldPoint>();

            Random r = new Random();
            /*for (int i = 0; i < 10; i++)
            {
                WorldPoint point = new WorldPoint(new Vector2((float)r.NextDouble() * 400 - 200, (float)r.NextDouble() * 200 - 100));
                points.Add(point);
            }*/

            WorldPoint point = new WorldPoint(new Vector2(-10, 0));
            points.Add(point);
            point = new WorldPoint(new Vector2(10, 0));
            points.Add(point);

            projectionMatrix = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4, device.Viewport.AspectRatio, 1.0f, 300.0f);
            //projectionMatrix = Matrix.CreateOrthographic(device.Viewport.Width, device.Viewport.Height, 0.1f, 100);
            viewMatrix = Matrix.CreateLookAt(new Vector3(0, 0, 20), Vector3.Zero, Vector3.Up);
            // 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 (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            // 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.Black);
            RasterizerState rs = new RasterizerState();
            rs.FillMode = FillMode.WireFrame;
            
            //device.RasterizerState = rs;
            effect.Projection = projectionMatrix;
            effect.VertexColorEnabled = true;
            effect.View = viewMatrix;
            effect.World = Matrix.Identity;
            foreach (EffectPass pass in effect.CurrentTechnique.Passes)
            {
                pass.Apply();
                foreach (WorldPoint point in points)
                {
                    point.Draw(device);
                }
            }

            

            base.Draw(gameTime);
        }
    }
}