WPF 3D Cube及点击交互_wpf 3d 交互

       在WPF中构建一个简单的立方体比较容易实现，可参考资料也比较众多。比较麻烦的是处理点击交互。

       我在WPF中用两种方式实现了3DCube，效果图如下：

方式一： 最常见的3D内容构建模式，结构如下图。

参考

<Viewport3D SnapsToDevicePixels="True" ClipToBounds="True"
                    RenderTransformOrigin="0.5 0.5" RenderOptions.EdgeMode="Aliased" 
                    RenderOptions.CachingHint="Cache">
            <!--Camera-->
            <Viewport3D.Camera>
                <PerspectiveCamera x:Name="CameraMain" Position="4,4,6" UpDirection="0,1,0" LookDirection="-4,-4,-6" 
                                       NearPlaneDistance="1" FarPlaneDistance="100" FieldOfView="120">
                    <PerspectiveCamera.Transform>
                        <Transform3DGroup>
                            <RotateTransform3D>
                                <RotateTransform3D.Rotation>
                                    <AxisAngleRotation3D x:Name="CameraRotate" Axis="0,1,0" Angle="0"/>
                                </RotateTransform3D.Rotation>
                            </RotateTransform3D>
                            <ScaleTransform3D />
                        </Transform3DGroup>
                    </PerspectiveCamera.Transform>
                </PerspectiveCamera>
            </Viewport3D.Camera>
            <!--Light-->
            <ModelVisual3D>
                <ModelVisual3D.Content>
                    <Model3DGroup>
                        <AmbientLight Color="White"></AmbientLight>
                        <DirectionalLight Color="White"  Direction="4,6,-6"/>
                    </Model3DGroup>
                </ModelVisual3D.Content>
            </ModelVisual3D>
            <!--六个面-->
            <ModelVisual3D x:Name="CubeSlaveContainer">
                <ModelUIElement3D>
                    <GeometryModel3D  x:Name="TopPanel">
                        <GeometryModel3D.Material>
                            <DiffuseMaterial x:Name="MaterialTop">
                                <DiffuseMaterial.Brush>
                                    <VisualBrush>
                                        <VisualBrush.Visual>
                                            <TextBlock Text="1" Foreground="White"/>
                                        </VisualBrush.Visual>
                                    </VisualBrush>
                                </DiffuseMaterial.Brush>
                            </DiffuseMaterial>
                        </GeometryModel3D.Material>
                        <GeometryModel3D.BackMaterial>
                            <DiffuseMaterial Brush="Transparent"/>
                        </GeometryModel3D.BackMaterial>
                        <GeometryModel3D.Geometry>
                            <MeshGeometry3D Positions="-2,2,2  2,2,2  2,2,-2  -2,2,-2"