1.  
  1. 以下xmal是我从msdn上复制下来的。是用于在wpf中创建3d模型的实例
    链接https://msdn.microsoft.com/zh-cn/library/ms747437.aspx
    看它的使用方式。我画了个比较马虎的逻辑图。
  1.  1 <UserControl x:Class="HostingWpfUserControlInWf.UserControl1"
  2.      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  3.      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  4.      >
  5.  
  6.      <Grid>
  7.  
  8.        <!-- Place a Label control at the top of the view. -->
  9.        <Label
  10.                  HorizontalAlignment="Center"
  11.                  TextBlock.TextAlignment="Center"
  12.                  FontSize="20"
  13.                  Foreground="Red"
  14.                  Content="Model: Cone"/>
  15.  
  16.        <!-- Viewport3D is the rendering surface. -->
  17.        <Viewport3D Name="myViewport" >
  18.  
  19.          <!-- Add a camera. -->
  20.          <Viewport3D.Camera>
  21.            <PerspectiveCamera
  22.                          FarPlaneDistance="20"
  23.                          LookDirection="0,0,1"
  24.                          UpDirection="0,1,0"
  25.                          NearPlaneDistance="1"
  26.                          Position="0,0,-3"
  27.                          FieldOfView="45" />
  28.          </Viewport3D.Camera>
  29.  
  30.          <!-- Add models. -->
  31.          <Viewport3D.Children>
  32.  
  33.            <ModelVisual3D>
  34.              <ModelVisual3D.Content>
  35.  
  36.                <Model3DGroup >
  37.                  <Model3DGroup.Children>
  38.  
  39.                    <!-- Lights, MeshGeometry3D and DiffuseMaterial objects are added to the ModelVisual3D. -->
  40.                    <DirectionalLight Color="#FFFFFFFF" Direction="3,-4,5" />
  41.  
  42.                    <!-- Define a red cone. -->
  43.                    <GeometryModel3D>
  44.  
  45.                      <GeometryModel3D.Geometry>
  46.                        <MeshGeometry3D
  47.      Positions="0.293893 -0.5 0.404509  0.475528 -0.5 0.154509  0 0.5 0  0.475528 -0.5 0.154509  0 0.5 0  0 0.5 0  0.475528 -0.5 0.154509  0.475528 -0.5 -0.154509  0 0.5 0  0.475528 -0.5 -0.154509  0 0.5 0  0 0.5 0  0.475528 -0.5 -0.154509  0.293893 -0.5 -0.404509  0 0.5 0  0.293893 -0.5 -0.404509  0 0.5 0  0 0.5 0  0.293893 -0.5 -0.404509  0 -0.5 -0.5  0 0.5 0  0 -0.5 -0.5  0 0.5 0  0 0.5 0  0 -0.5 -0.5  -0.293893 -0.5 -0.404509  0 0.5 0  -0.293893 -0.5 -0.404509  0 0.5 0  0 0.5 0  -0.293893 -0.5 -0.404509  -0.475528 -0.5 -0.154509  0 0.5 0  -0.475528 -0.5 -0.154509  0 0.5 0  0 0.5 0  -0.475528 -0.5 -0.154509  -0.475528 -0.5 0.154509  0 0.5 0  -0.475528 -0.5 0.154509  0 0.5 0  0 0.5 0  -0.475528 -0.5 0.154509  -0.293892 -0.5 0.404509  0 0.5 0  -0.293892 -0.5 0.404509  0 0.5 0  0 0.5 0  -0.293892 -0.5 0.404509  0 -0.5 0.5  0 0.5 0  0 -0.5 0.5  0 0.5 0  0 0.5 0  0 -0.5 0.5  0.293893 -0.5 0.404509  0 0.5 0  0.293893 -0.5 0.404509  0 0.5 0  0 0.5 0  "
  48.      Normals="0.7236065,0.4472139,0.5257313  0.2763934,0.4472138,0.8506507  0.5308242,0.4294462,0.7306172  0.2763934,0.4472138,0.8506507  0,0.4294458,0.9030925  0.5308242,0.4294462,0.7306172  0.2763934,0.4472138,0.8506507  -0.2763934,0.4472138,0.8506507  0,0.4294458,0.9030925  -0.2763934,0.4472138,0.8506507  -0.5308242,0.4294462,0.7306172  0,0.4294458,0.9030925  -0.2763934,0.4472138,0.8506507  -0.7236065,0.4472139,0.5257313  -0.5308242,0.4294462,0.7306172  -0.7236065,0.4472139,0.5257313  -0.858892,0.429446,0.279071  -0.5308242,0.4294462,0.7306172  -0.7236065,0.4472139,0.5257313  -0.8944269,0.4472139,0  -0.858892,0.429446,0.279071  -0.8944269,0.4472139,0  -0.858892,0.429446,-0.279071  -0.858892,0.429446,0.279071  -0.8944269,0.4472139,0  -0.7236065,0.4472139,-0.5257313  -0.858892,0.429446,-0.279071  -0.7236065,0.4472139,-0.5257313  -0.5308242,0.4294462,-0.7306172  -0.858892,0.429446,-0.279071  -0.7236065,0.4472139,-0.5257313  -0.2763934,0.4472138,-0.8506507  -0.5308242,0.4294462,-0.7306172  -0.2763934,0.4472138,-0.8506507  0,0.4294458,-0.9030925  -0.5308242,0.4294462,-0.7306172  -0.2763934,0.4472138,-0.8506507  0.2763934,0.4472138,-0.8506507  0,0.4294458,-0.9030925  0.2763934,0.4472138,-0.8506507  0.5308249,0.4294459,-0.7306169  0,0.4294458,-0.9030925  0.2763934,0.4472138,-0.8506507  0.7236068,0.4472141,-0.5257306  0.5308249,0.4294459,-0.7306169  0.7236068,0.4472141,-0.5257306  0.8588922,0.4294461,-0.27907  0.5308249,0.4294459,-0.7306169  0.7236068,0.4472141,-0.5257306  0.8944269,0.4472139,0  0.8588922,0.4294461,-0.27907  0.8944269,0.4472139,0  0.858892,0.429446,0.279071  0.8588922,0.4294461,-0.27907  0.8944269,0.4472139,0  0.7236065,0.4472139,0.5257313  0.858892,0.429446,0.279071  0.7236065,0.4472139,0.5257313  0.5308242,0.4294462,0.7306172  0.858892,0.429446,0.279071  "                   TriangleIndices="0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 " />
  49.                      </GeometryModel3D.Geometry>
  50.  
  51.                      <GeometryModel3D.Material>
  52.                        <DiffuseMaterial>
  53.                          <DiffuseMaterial.Brush>
  54.                            <SolidColorBrush
  55.                              Color="Red"
  56.                              Opacity="1.0"/>
  57.                          </DiffuseMaterial.Brush>
  58.                        </DiffuseMaterial>
  59.                      </GeometryModel3D.Material>
  60.  
  61.                    </GeometryModel3D>
  62.  
  63.                  </Model3DGroup.Children>
  64.                </Model3DGroup>
  65.  
  66.              </ModelVisual3D.Content>
  67.  
  68.            </ModelVisual3D>
  69.  
  70.          </Viewport3D.Children>
  71.  
  72.        </Viewport3D>
  73.      </Grid>
  74.  
  75.  </UserControl>
  76.  
  1.  

其实，最为关键的ModelView3D还有其他用法，比如ModelView3D.Content下只放个Model3DGroup，Model3DGroup下写个DirectionalLight，、ModelView3D再另外写个Children,下面放一些模型，也就是灯光放在Content里面，模型放在Children里面。例如上面的xmal代码可以改为：

  1.  <UserControl
  2.      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  3.      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  4.      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="WpfControlLibrary1.UserControl1"
  5.      d:DesignWidth="300" d:DesignHeight="200"
  6.      >
  7.  
  8.      <Grid>
  9.  
  10.          <!-- Place a Label control at the top of the view. -->
  11.          <Label
  12.                  HorizontalAlignment="Center"
  13.                  TextBlock.TextAlignment="Center"
  14.                  FontSize="20"
  15.                  Foreground="Red"
  16.                  Content="Model: Cone"/>
  17.  
  18.          <!-- Viewport3D is the rendering surface. -->
  19.          <Viewport3D x:Name="myViewport" >
  20.  
  21.              <!-- Add a camera. -->
  22.              <Viewport3D.Camera>
  23.                  <PerspectiveCamera
  24.                          FarPlaneDistance="20"
  25.                          LookDirection="0,0,1"
  26.                          UpDirection="0,1,0"
  27.                          NearPlaneDistance="1"
  28.                          Position="0,0,-3"
  29.                          FieldOfView="45" />
  30.              </Viewport3D.Camera>
  31.  
  32.              <!-- Add models. -->
  33.  
  34.              <ModelVisual3D>
  35.                  <ModelVisual3D.Children>
  36.                      <ModelVisual3D>
  37.                          <ModelVisual3D.Content>
  38.                              <Model3DGroup>
  39.                                  <Model3DGroup.Children>
  40.                                      <GeometryModel3D>
  41.  
  42.                                          <GeometryModel3D.Geometry>
  43.                                              <MeshGeometry3D
  44.                                      Positions="0.293893,-0.5,0.404509 0.475528,-0.5,0.154509 0,0.5,0 0.475528,-0.5,0.154509 0,0.5,0 0,0.5,0 0.475528,-0.5,0.154509 0.475528,-0.5,-0.154509 0,0.5,0 0.475528,-0.5,-0.154509 0,0.5,0 0,0.5,0 0.475528,-0.5,-0.154509
  45.  0.293893,-0.5,-0.404509 0,0.5,0 0.293893,-0.5,-0.404509 0,0.5,0 0,0.5,0 0.293893,-0.5,-0.404509 0,-0.5,-0.5 0,0.5,0 0,-0.5,-0.5 0,0.5,0 0,0.5,0 0,-0.5,-0.5 -0.293893,-0.5,-0.404509
  46.  0,0.5,0 -0.293893,-0.5,-0.404509 0,0.5,0 0,0.5,0 -0.293893,-0.5,-0.404509 -0.475528,-0.5,-0.154509 0,0.5,0 -0.475528,-0.5,-0.154509 0,0.5,0 0,0.5,0 -0.475528,-0.5,-0.154509 -0.475528,-0.5,0.154509 0,0.5,0
  47.  -0.475528,-0.5,0.154509 0,0.5,0 0,0.5,0 -0.475528,-0.5,0.154509 -0.293892,-0.5,0.404509 0,0.5,0 -0.293892,-0.5,0.404509 0,0.5,0 0,0.5,0 -0.293892,-0.5,0.404509 0,-0.5,0.5 0,0.5,0 0,-0.5,0.5
  48.  0,0.5,0 0,0.5,0 0,-0.5,0.5 0.293893,-0.5,0.404509 0,0.5,0 0.293893,-0.5,0.404509 0,0.5,0 0,0.5,0"
  49.                                      Normals="0.7236065,0.4472139,0.5257313 0.2763934,0.4472138,0.8506507 0.5308242,0.4294462,0.7306172 0.2763934,0.4472138,0.8506507 0,0.4294458,0.9030925 0.5308242,0.4294462,0.7306172 0.2763934,0.4472138,0.8506507 -0.2763934,0.4472138,0.8506507 0,0.4294458,0.9030925 -0.2763934,0.4472138,0.8506507 -0.5308242,0.4294462,0.7306172 0,0.4294458,0.9030925 -0.2763934,0.4472138,0.8506507
  50.  -0.7236065,0.4472139,0.5257313 -0.5308242,0.4294462,0.7306172 -0.7236065,0.4472139,0.5257313 -0.858892,0.429446,0.279071 -0.5308242,0.4294462,0.7306172 -0.7236065,0.4472139,0.5257313 -0.8944269,0.4472139,0 -0.858892,0.429446,0.279071 -0.8944269,0.4472139,0 -0.858892,0.429446,-0.279071 -0.858892,0.429446,0.279071 -0.8944269,0.4472139,0 -0.7236065,0.4472139,-0.5257313
  51.  -0.858892,0.429446,-0.279071 -0.7236065,0.4472139,-0.5257313 -0.5308242,0.4294462,-0.7306172 -0.858892,0.429446,-0.279071 -0.7236065,0.4472139,-0.5257313 -0.2763934,0.4472138,-0.8506507 -0.5308242,0.4294462,-0.7306172 -0.2763934,0.4472138,-0.8506507 0,0.4294458,-0.9030925 -0.5308242,0.4294462,-0.7306172 -0.2763934,0.4472138,-0.8506507 0.2763934,0.4472138,-0.8506507 0,0.4294458,-0.9030925
  52.  0.2763934,0.4472138,-0.8506507 0.5308249,0.4294459,-0.7306169 0,0.4294458,-0.9030925 0.2763934,0.4472138,-0.8506507 0.7236068,0.4472141,-0.5257306 0.5308249,0.4294459,-0.7306169 0.7236068,0.4472141,-0.5257306 0.8588922,0.4294461,-0.27907 0.5308249,0.4294459,-0.7306169 0.7236068,0.4472141,-0.5257306 0.8944269,0.4472139,0 0.8588922,0.4294461,-0.27907 0.8944269,0.4472139,0
  53.  0.858892,0.429446,0.279071 0.8588922,0.4294461,-0.27907 0.8944269,0.4472139,0 0.7236065,0.4472139,0.5257313 0.858892,0.429446,0.279071 0.7236065,0.4472139,0.5257313 0.5308242,0.4294462,0.7306172 0.858892,0.429446,0.279071"                   TriangleIndices="0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 " />
  54.                                          </GeometryModel3D.Geometry>
  55.  
  56.                                          <GeometryModel3D.Material>
  57.                                              <DiffuseMaterial>
  58.                                                  <DiffuseMaterial.Brush>
  59.                                                      <SolidColorBrush
  60.                                              Color="Red"
  61.                                              Opacity="1.0"/>
  62.                                                  </DiffuseMaterial.Brush>
  63.                                              </DiffuseMaterial>
  64.                                          </GeometryModel3D.Material>
  65.  
  66.                                      </GeometryModel3D>
  67.  
  68.                                  </Model3DGroup.Children>
  69.                              </Model3DGroup>
  70.                          </ModelVisual3D.Content>
  71.                      </ModelVisual3D>
  72.                  </ModelVisual3D.Children>
    //上面是Children，放模型
    //这里是Content,里面只放灯光
  73.                  <ModelVisual3D.Content>
  74.                      <Model3DGroup >
  75.                          <Model3DGroup.Children>
  76.                              <!-- Lights, MeshGeometry3D and DiffuseMaterial objects are added to the ModelVisual3D. -->
  77.                              <DirectionalLight Color="#FFFFFFFF" Direction="3,-4,5" />
  78.  
  79.                              <!-- Define a red cone. -->
  80.                          </Model3DGroup.Children>
  81.                      </Model3DGroup>
  82.  
  83.                  </ModelVisual3D.Content>
  84.  
  85.              </ModelVisual3D>
  86.  
  87.          </Viewport3D>
  88.      </Grid>
  89.  
  90.  </UserControl>

以上是我对wpf中最基础的三维的理解，如果错误，欢迎指出。

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