新建一个WPF工程；

引入3D Tools；前面已经说了，引入之后，不用写代码即可实现3D物体的鼠标操作；

xaml代码如下；

<Window x:Class="thrbtn.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="3D立方体上加按钮" Height="450" Width="450"
        xmlns:tools="clr-namespace:_3DTools;assembly=3DTools"
    >


    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition Height="Auto"></RowDefinition>
        </Grid.RowDefinitions>

        <Border BorderBrush="Yellow" BorderThickness="1" Margin="5">
            <tools:TrackballDecorator>

                <Viewport3D>
                    <Viewport3D.Camera>
                        <PerspectiveCamera          
          LookDirection="2,-1,-1"
          UpDirection="0,1,0"
          Position="-20,15,15"
          NearPlaneDistance="1"
          FarPlaneDistance="100"
          FieldOfView="40"
            >

                        </PerspectiveCamera>
                    </Viewport3D.Camera>

                    <ModelVisual3D>
                        <ModelVisual3D.Content>
                            <DirectionalLight
             Color="Yellow"
             Direction="-2,-3,-1" />
                        </ModelVisual3D.Content>
                    </ModelVisual3D>

                    <ModelVisual3D>
                        <ModelVisual3D.Content>
                            <DirectionalLight
             Color="Green"
             Direction="2,1,1" />
                        </ModelVisual3D.Content>
                    </ModelVisual3D>

                    <ModelVisual3D>
                        <ModelVisual3D.Content>
                            <GeometryModel3D>
                                <GeometryModel3D.Geometry>
                                    <MeshGeometry3D Positions="0,0,0 10,0,0 0,10,0 10,10,0
                                           0,0,10 10,0,10 0,10,10 10,10,10"
                      TriangleIndices="0,2,1 1,2,3 
                                                 0,1,4 1,5,4 1,7,5 1,3,7 
                                                 4,5,6 7,6,5 2,6,3 3,6,7"
                       Normals="0,1,0 0,1,0 1,0,0 1,0,0
                                 0,1,0 0,1,0 1,0,0 1,0,0" />

                                </GeometryModel3D.Geometry>
                                <GeometryModel3D.Material>
                                    <DiffuseMaterial Brush="LightBlue" />
                                </GeometryModel3D.Material>
                            </GeometryModel3D>
                        </ModelVisual3D.Content>
                        <ModelVisual3D.Transform>
                            <RotateTransform3D>
                                <RotateTransform3D.Rotation>
                                    <AxisAngleRotation3D Angle="{Binding ElementName=sliderRotate, Path=Value}"
                                     Axis="0 1 0" />
                                </RotateTransform3D.Rotation>
                            </RotateTransform3D>
                        </ModelVisual3D.Transform>
                    </ModelVisual3D>


                    <Viewport2DVisual3D>
                        <Viewport2DVisual3D.Geometry>
                            <MeshGeometry3D
                Positions="0,0,0 0,0,10 0,10,0 0,10,10"
               TriangleIndices="0,1,2 2,1,3"
               TextureCoordinates="0,1 1,1 0,0 1,0"
                               />
                        </Viewport2DVisual3D.Geometry>

                        <Viewport2DVisual3D.Material>
                            <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True" />
                        </Viewport2DVisual3D.Material>

                        <Viewport2DVisual3D.Visual>
                            <Border BorderBrush="Yellow" BorderThickness="1">
                                <StackPanel Margin="10">
                                    <TextBlock Margin="3"> 2D content 呈现在3D表面</TextBlock>
                                    <Button Margin="3" Click="cmd_Click">Click Me</Button>
                                    <TextBox Margin="3">......；</TextBox>
                                </StackPanel>
                            </Border>
                        </Viewport2DVisual3D.Visual>

                    </Viewport2DVisual3D>

                </Viewport3D>

            </tools:TrackballDecorator>
        </Border>

        <Slider Margin="5" Grid.Row="1"  Minimum="0" Maximum="360" Orientation="Horizontal" Name="sliderRotate" ></Slider>
    </Grid>
</Window>

首先是一个grid，grid是一个四方形布局控件，对grid进行了行划分；第1行显示3D立方体；第2行显示一个滑动条控件；

grid的第一行；先用Border控件画一个边框；

然后使用3D Tools的<tools:TrackballDecorator>标签，这样此标签里的3D物体可以直接用鼠标操作；

然后是<Viewport3D>，这里面是呈现3D内容的；

在 <Viewport3D> 里；先定义摄像机，光源，然后画3d立方体；

然后添加一个 <Viewport2DVisual3D> 元素；

在<Viewport2DVisual3D>里，先设置纹理坐标；

然后用一个垂直面板控件，三行分别放一个文本块控件、一个按钮、一个文本框；

按钮单击事件在cs文件里只是弹一个消息框；

运行一下如下；

可用鼠标旋转翻转；