原文:

WavefrontObjLoader.cs

 

第二步：ModelVisual3DWithName.cs

public class ModelVisual3DWithName:ModelVisual3D

    {         public string Name { get; set; }

        public object Tag { get; set; }

    }

第三步：MainWindow.xmal

<Grid x:Name="lay">

     <Viewport3D x:Name="vp" Margin="0">       <Viewport3D.Camera>        <PerspectiveCamera FieldOfView="45" FarPlaneDistance="100" LookDirection="0,0,-3.4142135623731" NearPlaneDistance="0.1" Position="0,0,3.4142135623731" UpDirection="0,3,0"/>       </Viewport3D.Camera>         </Viewport3D>         <Slider Height="23" HorizontalAlignment="Left" Margin="220,288,0,0" Name="slider1" VerticalAlignment="Top" Width="100" Maximum="2000" />         <Slider Height="23" HorizontalAlignment="Left" Margin="49,288,0,0" Name="slider2" VerticalAlignment="Top" Width="100" Maximum="1000" />         <Slider Height="23" HorizontalAlignment="Left" Margin="367,288,0,0" Name="slider3" VerticalAlignment="Top" Width="100" Minimum="200" Maximum="2000" />         <Slider Height="23" HorizontalAlignment="Left" Margin="567,288,0,0" Name="slider4" VerticalAlignment="Top" Width="100" Minimum="200" Maximum="2000" />     </Grid>

第四步：MainWindow.xmal

PerspectiveCamera myPCamera;

        DirectionalLight myDirectionalLight;         Model3DGroup myModel3DGroup;         WavefrontObjLoader wfl;         ModelVisual3DWithName mv3dw;         public MainWindow()         {             InitializeComponent();             wfl = new WavefrontObjLoader();            slider1.ValueChanged += new RoutedPropertyChangedEventHandler<double>(slider1_ValueChanged);             slider2.ValueChanged += new RoutedPropertyChangedEventHandler<double>(slider2_ValueChanged);             slider3.ValueChanged += new RoutedPropertyChangedEventHandler<double>(slider3_ValueChanged);             slider4.ValueChanged += new RoutedPropertyChangedEventHandler<double>(slider4_ValueChanged);                         createCamera();             createLight();             createModel3D();             create360();             //createAnimation();         }         #region //光源         private void createLight()         {             myDirectionalLight = new DirectionalLight();             myDirectionalLight.Color = Colors.White;             myDirectionalLight.Direction = new Vector3D(-0.61, -0.5, -0.61);         }         #endregion         #region //摄像机         private void createCamera()         {             myPCamera = new PerspectiveCamera();             //myPCamera.Position = new Point3D(0,-1743,-4000);//看的方向             myPCamera.Position = new Point3D(0, 0, 1000);             myPCamera.LookDirection = new Vector3D(0,0,-1000);//摄影机看的方向             myPCamera.UpDirection = new Vector3D(0, 1, -0);             myPCamera.FieldOfView = 45;//法向量 摄影机上下颠倒,左转右转            myPCamera.NearPlaneDistance = 0.1;             myPCamera.FarPlaneDistance = 11050;

            vp.Camera = myPCamera;

        }         #endregion         #region //模型         private void createModel3D()         {             myModel3DGroup = new Model3DGroup();             myModel3DGroup.Children.Add(myDirectionalLight);

            var m = wfl.LoadObjFile(@"C:/Users/Adminstrator/Desktop/3D动态加载/WpfApplication2/xx.obj");

            m.Content = myModel3DGroup;

            vp.Children.Add(m);

        }         #endregion         #region //360旋转动作         RotateTransform3D rtf3D;         AxisAngleRotation3D aar;         private void create360()         {             rtf3D = new RotateTransform3D();                        aar = new AxisAngleRotation3D();             this.RegisterName("myAngleRotation", aar);             aar.Angle = 0;             aar.Axis = new Vector3D(0, 3, 0);             rtf3D.Rotation = aar;             myModel3DGroup.Transform = rtf3D;             myPCamera.Transform = rtf3D;         }         Storyboard sbd;         DoubleAnimation dan;         private void createAnimation()         {             sbd = new Storyboard();             dan = new DoubleAnimation(0,360,new Duration(TimeSpan.FromSeconds(10)));             dan.RepeatBehavior = RepeatBehavior.Forever;             Storyboard.SetTargetName(dan,"myAngleRotation");             Storyboard.SetTargetProperty(dan, new PropertyPath(AxisAngleRotation3D.AngleProperty));             sbd.Children.Add(dan);             sbd.BeginTime = TimeSpan.FromSeconds(5);//开始时间             sbd.Begin(this);         }         #endregion         void slider1_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)         {             myPCamera.Position = new Point3D(slider1.Value , slider2.Value, slider3.Value);         }         void slider2_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)         {             myPCamera.Position = new Point3D(slider1.Value, slider2.Value, slider3.Value);         }         void slider3_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)         {             myPCamera.Position = new Point3D(slider1.Value, slider2.Value, slider3.Value);         }         void slider4_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)         {             aar.Angle = slider4.Value;         }