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Procedura: Applicare un disegno a un modello 3D

  • Articolo

Questo esempio illustra come usare un DrawingBrush oggetto come Material applicato a un modello 3D.

Il codice seguente definisce un oggetto DrawingGroup come contenuto di un oggetto DrawingBrush. l'oggetto DrawingBrush viene impostato come Brush proprietà dell'oggetto DiffuseMaterial applicato a un piano 3D.

Nota

Spesso è consigliabile definire oggetti e valori complessi come il disegno seguente come risorse che possono essere riutilizzate e semplificare il codice. Per altre informazioni, vedi Risorse XAML.

<!-- The material specifies the material applied to the 3D object. In this sample a tiled drawing   
     covers the surface of the 3D object.-->
<GeometryModel3D.Material>
  <DiffuseMaterial>
    <DiffuseMaterial.Brush>
      <DrawingBrush Viewport="0,0,0.1,0.1" TileMode="Tile">
        <DrawingBrush.Drawing>
          <DrawingGroup>
            <DrawingGroup.Children>
              <GeometryDrawing Geometry="M0,0.1 L0.1,0 1,0.9, 0.9,1z"
                Brush="Gray" />
              <GeometryDrawing Geometry="M0.9,0 L1,0.1 0.1,1 0,0.9z"
                Brush="Gray" />
              <GeometryDrawing Geometry="M0.25,0.25 L0.5,0.125 0.75,0.25 0.5,0.5z"
                Brush="#FFFF00" />
              <GeometryDrawing Geometry="M0.25,0.75 L0.5,0.875 0.75,0.75 0.5,0.5z"
                Brush="Black" />
              <GeometryDrawing Geometry="M0.25,0.75 L0.125,0.5 0.25,0.25 0.5,0.5z"
                Brush="#FF0000" />
              <GeometryDrawing Geometry="M0.75,0.25 L0.875,0.5 0.75,0.75 0.5,0.5z"
                Brush="MediumBlue" />
            </DrawingGroup.Children>
          </DrawingGroup>
        </DrawingBrush.Drawing>
      </DrawingBrush>
    </DiffuseMaterial.Brush>
  </DiffuseMaterial>
</GeometryModel3D.Material>

Esempio

Il codice seguente illustra l'intero esempio.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
  <DockPanel>
    <Viewbox>
      <Canvas Width="321" Height="201">

        <!-- The Viewport3D provides a rendering surface for 3-D visual content. -->
        <Viewport3D ClipToBounds="True" Width="150" Height="150" Canvas.Left="0" Canvas.Top="10">

          <!-- Defines the camera used to view the 3D object. -->
          <Viewport3D.Camera>
            <PerspectiveCamera Position="0,0,2" LookDirection="0,0,-1" FieldOfView="60" />
          </Viewport3D.Camera>

          <!-- The ModelVisual3D children contain the 3D models -->
          <Viewport3D.Children>

            <!-- This ModelVisual3D defines the light cast in the scene. Without light, the 3D 
                 object cannot be seen. Also, the direction of the lights affect shadowing. If desired,
                 you can create multiple lights with different colors that shine from different directions. -->
            <ModelVisual3D>
              <ModelVisual3D.Content>
                <DirectionalLight Color="#FFFFFF" Direction="-0.612372,-0.5,-0.612372" />
              </ModelVisual3D.Content>
            </ModelVisual3D>
            <ModelVisual3D>
              <ModelVisual3D.Content>
                <GeometryModel3D>

                  <!-- The geometry specifies the shape of the 3D plane. In this sample, a flat sheet is created. -->
                  <GeometryModel3D.Geometry>
                    <MeshGeometry3D
                     TriangleIndices="0,1,2 3,4,5 "
                     Normals="0,0,1 0,0,1 0,0,1 0,0,1 0,0,1 0,0,1 "
                     TextureCoordinates="0,0 1,0 1,1 1,1 0,1 0,0 "
                     Positions="-0.5,-0.5,0.5 0.5,-0.5,0.5 0.5,0.5,0.5 0.5,0.5,0.5 -0.5,0.5,0.5 -0.5,-0.5,0.5 " />
                  </GeometryModel3D.Geometry>
                  <!-- The material specifies the material applied to the 3D object. In this sample a tiled drawing   
                       covers the surface of the 3D object.-->
                  <GeometryModel3D.Material>
                    <DiffuseMaterial>
                      <DiffuseMaterial.Brush>
                        <DrawingBrush Viewport="0,0,0.1,0.1" TileMode="Tile">
                          <DrawingBrush.Drawing>
                            <DrawingGroup>
                              <DrawingGroup.Children>
                                <GeometryDrawing Geometry="M0,0.1 L0.1,0 1,0.9, 0.9,1z"
                                  Brush="Gray" />
                                <GeometryDrawing Geometry="M0.9,0 L1,0.1 0.1,1 0,0.9z"
                                  Brush="Gray" />
                                <GeometryDrawing Geometry="M0.25,0.25 L0.5,0.125 0.75,0.25 0.5,0.5z"
                                  Brush="#FFFF00" />
                                <GeometryDrawing Geometry="M0.25,0.75 L0.5,0.875 0.75,0.75 0.5,0.5z"
                                  Brush="Black" />
                                <GeometryDrawing Geometry="M0.25,0.75 L0.125,0.5 0.25,0.25 0.5,0.5z"
                                  Brush="#FF0000" />
                                <GeometryDrawing Geometry="M0.75,0.25 L0.875,0.5 0.75,0.75 0.5,0.5z"
                                  Brush="MediumBlue" />
                              </DrawingGroup.Children>
                            </DrawingGroup>
                          </DrawingBrush.Drawing>
                        </DrawingBrush>
                      </DiffuseMaterial.Brush>
                    </DiffuseMaterial>
                  </GeometryModel3D.Material>
                  <!-- Apply a transform to the object. In this sample, a rotation transform is applied, rendering the 
                       3D object rotated. -->
                  <GeometryModel3D.Transform>
                    <RotateTransform3D>
                      <RotateTransform3D.Rotation>
                        <AxisAngleRotation3D Axis="0,3,0" Angle="40" />
                      </RotateTransform3D.Rotation>
                    </RotateTransform3D>
                  </GeometryModel3D.Transform>
                </GeometryModel3D>
              </ModelVisual3D.Content>
            </ModelVisual3D>
          </Viewport3D.Children>
        </Viewport3D>
      </Canvas>
    </Viewbox>
  </DockPanel>
</Page>

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