fbx文件导入3dmax_3d中z轴的值没办法输入

//本代码以网上参考稍作修改，使用请注明非本人原创，因未知是谁原创特此声明非本人原创
using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System.Runtime.Remoting.Messaging;

namespace _3DModel
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {

        #region 变量
        GraphicsDeviceManager graphics;    //声明一个图形设备管理器//define a graphics manage
        SpriteBatch spriteBatch;           //声明一个精灵集群.可以以相同的设置操纵(draw)一组精灵//define a SpriteBatch 
        Model myModel;                     //定义一个Model//define a model
        float aspectRatio;                 //屏幕高宽比,控制3D世界的视图怎样转换成屏幕上的2D图象(投射)用到//control the screen,make the 3d model show in 2d sreen
        Vector3 modelPosition = Vector3.Zero;        //模型在屏幕上的位置(世界坐标系),屏幕中心为坐标原点//define a world coordinate,the origin is the center of screen
        //float modelRotationY = 0.0f;                  //模型旋转角度 //rotate the angle
        //float modelRotationX = 0.0f;                  //模型旋转角度 //rotate the angle
        /*******************************************************************************
         *                       +Y
         *                       |    -Z
         *                       |    /
         *                       |   /
         *                       |  /
         *                       | /
         *                (0,0,0) ------------+X
        /*******************************************************************************/
        Vector3 cameraPosition = new Vector3(1000.0f, 0.0f, 5000.0f);       //摄像机(眼睛)的位置和方向//vidicon location

        #endregion 变量
        System.Windows.Forms.Form xnaWindow;  //保存原始的窗体对象
        MainForm mainform; 
        public Game1(MainForm form)
        {
           
            graphics = new GraphicsDeviceManager(this);
            graphics.PreferredBackBufferHeight = 760;
            graphics.PreferredBackBufferWidth = 1200;
            Content.RootDirectory = "Content";
            //窗体对换
            this.mainform  = form;  
            graphics.PreparingDeviceSettings += new EventHandler<PreparingDeviceSettingsEventArgs>(graphics_PreparingDeviceSettings);
            xnaWindow = (System.Windows.Forms.Form)System.Windows.Forms.Control.FromHandle((this.Window.Handle));
            xnaWindow.GotFocus += new EventHandler(delegate(object sender, EventArgs e)
            {
                ((System.Windows.Forms.Form)sender).Visible = false;
                form.TopMost = false;
            });

        }

        public Game1()
        {
        }

        private void graphics_PreparingDeviceSettings(object sender, PreparingDeviceSettingsEventArgs e)
        {
            e.GraphicsDeviceInformation.PresentationParameters.DeviceWindowHandle = mainform.Panel.Handle;
        }
        
    
        SpriteBatch sprites;

        protected override void Initialize()
        {
            
         //   backgroundTexture = Content.Load<Texture2D>("akqm");
         
            sprites = new SpriteBatch(graphics.GraphicsDevice);
           

            
            base.Initialize();
        }

      protected override void LoadContent()
        {
            
            //spriteBatch = new SpriteBatch(GraphicsDevice);
            //myModel = Content.Load<Model>("Models\\"+mainform.filename);         //素材管道载入3D模型//download the 3d model
            //aspectRatio = (float)graphics.GraphicsDevice.Viewport.Width /(float)graphics.GraphicsDevice.Viewport.Height;
            loade();
            // TODO: use this.Content to load your game content here
        }


        public void loade()
        {
           
            spriteBatch = new SpriteBatch(GraphicsDevice);
            myModel = Content.Load<Model>("Models\\" + mainform.filename);         //素材管道载入3D模型//download the 3d model
            aspectRatio = (float)graphics.GraphicsDevice.Viewport.Width / (float)graphics.GraphicsDevice.Viewport.Height;

        }
      

        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }

       /// <summary>
       /// 
       /// </summary>
       /// <param name="gameTime"></param>


        protected override void Update(GameTime gameTime)
        {
            // Allows the game to exi
            GamePadState gamePad = GamePad.GetState(PlayerIndex.One);

            KeyboardState keyboard = Keyboard.GetState();
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || keyboard.IsKeyDown(Keys.Escape))
                     this.Exit();
            if (keyboard.IsKeyDown (Keys.Right ))
                Program.modelRotationY += (float)gameTime.ElapsedGameTime.TotalMilliseconds * MathHelper.ToRadians(0.1f);
             else if (keyboard.IsKeyDown (Keys.Left  ))
                Program.modelRotationY -= (float)gameTime.ElapsedGameTime.TotalMilliseconds * MathHelper.ToRadians(0.1f);
            else if (keyboard.IsKeyDown(Keys.Up ))
               Program.modelRotationX -= (float)gameTime.ElapsedGameTime.TotalMilliseconds * MathHelper.ToRadians(0.1f);
            else if (keyboard.IsKeyDown(Keys.Down ))
                Program.modelRotationX += (float)gameTime.ElapsedGameTime.TotalMilliseconds * MathHelper.ToRadians(0.1f);
            //if (mainform.filename != mainform.filename)
            //{
            //    base.Update(gameTime);
            //}
          

            base.Update(gameTime);
        }

       /// <summary>
       /// /
       /// </summary>
       /// <param name="gameTime"></param>
        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.Black);
            Matrix[] transforms = new Matrix[myModel.Bones.Count];
            myModel.CopyAbsoluteBoneTransformsTo(transforms);

            // 绘制模型 
            foreach (ModelMesh mesh in myModel.Meshes)   //遍历模型mesh// for() all the mesh
            {
                //BasicEffect类可以简单的通过设置属性，包含光照、纹理等等就可以在“五分钟”内实现对一个物体的呈现。
                string aaa = mesh.Name;
                //if (aaa.ToString().IndexOf("矩形")>0 ) {
    
    
                    foreach (BasicEffect effect in mesh.Effects)
                    {
               
                    effect.EnableDefaultLighting();        //光照 //light
                    effect.World = transforms[mesh.ParentBone.Index] * Matrix.CreateRotationY(Program.modelRotationY) * Matrix.CreateRotationX(Program.modelRotationX) * Matrix.CreateTranslation(modelPosition);     //使用World矩阵来改变模型在世界坐标系中的位置//use the World Matrix change the world coordinate
                        effect.View = Matrix.CreateLookAt(cameraPosition, Vector3.Zero, Vector3.Up);
                        effect.Projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.ToRadians(60.0f), aspectRatio, 1.0f, 10000.0f);
                    //Color[] colors = new Color[3];

                    //for (int i = 0; i < 3; i++)
                    //{
                    //    colors.SetValue(new Color(0, 1, 0), i);
                    //}
                  
                  

                }
                    
                    mesh.Draw();
                //}
            }
          

            //sprites.Begin();
            //sprites.Draw(backgroundTexture, Vector2.Zero, Color.White);
            //sprites.End();
            base.Draw(gameTime);
        }
    }
}