VCS/XnaModel - Sample is best!

開発環境	Microsoft Visual C# 2010 Express (SP1)
実行環境	Microsoft Windows XP Home Edition (SP3)
プロジェクトの種類	Windows Game (4.0)
プロジェクト名	XnaModel

Game1.cs

using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
 
namespace XnaModel
{
    class Game1 : Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch sprite;
        SpriteFont font;
        Model model;
        Matrix[] worlds;
        Matrix proj;
        MouseState mStateOld = new MouseState();
 
        // fps
        int sec;
        int draw = 0;
        int fps = 0;
 
        // カメラ
        float camLat = 30;
        float camLon = -150;
        float camDist = 10;
 
        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            graphics.PreferredBackBufferWidth = 1280;
            graphics.PreferredBackBufferHeight = 720;
            Content.RootDirectory = "Content";
            IsMouseVisible = true;
        }
 
        protected override void LoadContent()
        {
            sprite = new SpriteBatch(GraphicsDevice);
            font = Content.Load<SpriteFont>("SpriteFont1");
            model = Content.Load<Model>("aircraft");
 
            worlds = new Matrix[3];
            worlds[0] = Matrix.CreateTranslation(new Vector3(0, 0, 0));
            worlds[1] = Matrix.CreateTranslation(new Vector3(10, 0, -10));
            worlds[2] = Matrix.CreateTranslation(new Vector3(10, 0, 10));
 
            proj = Matrix.CreatePerspectiveFieldOfView(
                MathHelper.ToRadians(45), GraphicsDevice.Viewport.AspectRatio, 0.1f, 1000);
 
            foreach (ModelMesh mesh in model.Meshes)
            {
                foreach (BasicEffect effect in mesh.Effects)
                {
                    effect.EnableDefaultLighting();
                    //effect.DiffuseColor = new Vector3(0.8f, 0.8f, 0.8f);
                }
            }
 
            base.LoadContent();
        }
 
        protected override void Update(GameTime gameTime)
        {
            float deltaLat = 0;
            float deltaLon = 0;
            float deltaDist = 0;
 
            // キーボード
            KeyboardState kState = Keyboard.GetState();
            if (kState.IsKeyDown(Keys.Escape)) Exit();
            if (kState.IsKeyDown(Keys.Up)) deltaLat = 1;
            if (kState.IsKeyDown(Keys.Down)) deltaLat = -1;
            if (kState.IsKeyDown(Keys.Left)) deltaLon = 1;
            if (kState.IsKeyDown(Keys.Right)) deltaLon = -1;
            if (kState.IsKeyDown(Keys.PageUp)) deltaDist = -0.2f;
            if (kState.IsKeyDown(Keys.PageDown)) deltaDist = 0.2f;
 
            // マウス
            MouseState mState = Mouse.GetState();
            if (mState.LeftButton == ButtonState.Pressed)
            {
                deltaLat = (mState.Y - mStateOld.Y) * 0.5f;
                deltaLon = (mState.X - mStateOld.X) * 0.5f;
            }
            if (mState.ScrollWheelValue != mStateOld.ScrollWheelValue)
            {
                deltaDist = (mState.ScrollWheelValue - mStateOld.ScrollWheelValue) / -120;
            }
            mStateOld = mState;
 
            // カメラ移動
            if (deltaLat != 0)
            {
                camLat = MathHelper.Clamp(camLat + deltaLat, -89.9f, 89.9f);
            }
            if (deltaLon != 0)
            {
                camLon += deltaLon;
                if (camLon <= -180) camLon += 360;
                if (180 < camLon) camLon -= 360;
            }
            if (deltaDist != 0)
            {
                camDist = MathHelper.Clamp(camDist + deltaDist, 1, 1000);
            }
 
            base.Update(gameTime);
        }
 
        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);
            GraphicsDevice.DepthStencilState = DepthStencilState.Default;
            GraphicsDevice.BlendState = BlendState.AlphaBlend;
            //GraphicsDevice.RasterizerState = new RasterizerState { FillMode = FillMode.WireFrame};
 
            // カメラ位置
            float rad = MathHelper.ToRadians(camLat);
            float y = (float)Math.Sin(rad) * camDist;
            float r = (float)Math.Cos(rad) * camDist;
            rad = MathHelper.ToRadians(camLon);
            float x = (float)Math.Cos(rad) * r;
            float z = (float)Math.Sin(rad) * r;
            Matrix view = Matrix.CreateLookAt(new Vector3(x, y, z), Vector3.Zero, Vector3.Up);
 
            foreach (Matrix world in worlds)
            {
                model.Draw(world, view, proj);
            }
 
            // fps
            draw++;
            if (gameTime.TotalGameTime.Seconds != sec)
            {
                fps = draw;
                draw = 0;
                sec = gameTime.TotalGameTime.Seconds;
            }
 
            // 2D描画
            sprite.Begin();
            string text = String.Format(
                "fps={0} lat={1} long={2} dist={3:f1}", fps, camLat, camLon, camDist);
            sprite.DrawString(font, text, new Vector2(0, 0), Color.White);
            sprite.End();
 
            base.Draw(gameTime);
        }
    }
}