Основы 3Д. Работа с библиотекой графических примитивов.

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;
using Microsoft.Xna.Framework.Net;
using Microsoft.Xna.Framework.Storage;
using Primitives3D;

namespace Lab4
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        List<GeometricPrimitive> primitives = new List<GeometricPrimitive>();

        float angle;

        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
            primitives.Add(new SpherePrimitive(GraphicsDevice, 1, 20));
            primitives.Add(new SpherePrimitive(GraphicsDevice, 1, 3));
            primitives.Add(new CubePrimitive(GraphicsDevice, 1));
            primitives.Add(new CylinderPrimitive(GraphicsDevice, 1, 1, 20));
            primitives.Add(new TorusPrimitive(GraphicsDevice, 1, 0.3f, 20));
            primitives.Add(new TeapotPrimitive(GraphicsDevice, 1, 20));

            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
        }

        /// <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
            angle += (float)gameTime.ElapsedGameTime.TotalSeconds;

            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
            Matrix world = Matrix.CreateRotationY(angle);
            Matrix view = Matrix.CreateLookAt(new Vector3(0, 0, 5), Vector3.Zero, Vector3.Up);
            Matrix proj = Matrix.CreatePerspectiveFieldOfView(MathHelper.ToRadians(45), GraphicsDevice.Viewport.AspectRatio, 0.1f, 10);

            for (int i = 0; i < primitives.Count; i++)
            {
                Vector3 pos = new Vector3(i / 2 - 1, i % 2 - 0.5f, 0);
                Vector3 dir = pos - Vector3.Zero;
                pos += dir * 0.4f;

                world = Matrix.CreateRotationY(angle) * Matrix.CreateTranslation(pos);
                primitives[i].Draw(world, view, proj, Color.Red);

            }

            base.Draw(gameTime);
        }
    }
}