SpotLight.OuterConeAngle Eigenschaft

public:
 property double OuterConeAngle { double get(); void set(double value); };

public double OuterConeAngle { get; set; }

member this.OuterConeAngle : double with get, set

Public Property OuterConeAngle As Double

Eigenschaftswert

Der Winkel in Grad, der den Anteil einer SpotLightkegelförmigen Projektion außerhalb angibt, bei der das Licht keine Objekte in der Szene beleuchtet. Der Standardwert ist 90.

Beispiele

Das folgende Beispiel zeigt, wie Sie eine SpotLight in einer 3D-Szene erstellen.

<!-- A SpotLight is used to light the scene. The InnerConeAngle and OuterConeAngle are used
     to control the size of the light cone created by the SpotLight. The Direction and Position
     properties determine where the SpotLight is pointing in the scene. In this example, the Position
     of the SpotLight is set so that the SpotLight is only illuminating the upper right-hand corner
     of the 3D object. -->
<ModelVisual3D>
  <ModelVisual3D.Content>
    <SpotLight x:Name="mySpotLight" InnerConeAngle="20" OuterConeAngle="20" Color="#FFFFFF" Direction="0,0,-1" 
      Position="1,1,6" Range="20"/>
  </ModelVisual3D.Content>
</ModelVisual3D>

Der folgende Code zeigt das gesamte Beispiel.

<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>
            <!-- A SpotLight is used to light the scene. The InnerConeAngle and OuterConeAngle are used
                 to control the size of the light cone created by the SpotLight. The Direction and Position
                 properties determine where the SpotLight is pointing in the scene. In this example, the Position
                 of the SpotLight is set so that the SpotLight is only illuminating the upper right-hand corner
                 of the 3D object. -->
            <ModelVisual3D>
              <ModelVisual3D.Content>
                <SpotLight x:Name="mySpotLight" InnerConeAngle="20" OuterConeAngle="20" Color="#FFFFFF" Direction="0,0,-1" 
                  Position="1,1,6" Range="20"/>
              </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 linear gradient 
                       covers the surface of the 3D object.-->
                  <GeometryModel3D.Material>
                    <MaterialGroup>
                      <DiffuseMaterial>
                        <DiffuseMaterial.Brush>
                          <LinearGradientBrush StartPoint="0,0.5" EndPoint="1,0.5">
                            <LinearGradientBrush.GradientStops>
                              <GradientStop Color="Yellow" Offset="0" />
                              <GradientStop Color="Red" Offset="0.25" />
                              <GradientStop Color="Blue" Offset="0.75" />
                              <GradientStop Color="LimeGreen" Offset="1" />
                            </LinearGradientBrush.GradientStops>
                          </LinearGradientBrush>
                        </DiffuseMaterial.Brush>
                      </DiffuseMaterial>
                    </MaterialGroup>
                  </GeometryModel3D.Material>
                </GeometryModel3D>
              </ModelVisual3D.Content>
            </ModelVisual3D>
          </Viewport3D.Children>

        </Viewport3D>
      </Canvas>
    </Viewbox>
  </DockPanel>
</Page>

Hinweise

Die Intensität der SpotLightBeleuchtung verringert sich von der vollständigen Beleuchtung bis zu keiner in diesem Winkel der Projektion des Lichts zwischen dem InnerConeAngle und dem OuterConeAngle. Das Licht bietet keine Beleuchtung außerhalb des durch diese Eigenschaft angegebenen Winkels.

Informationen zur Abhängigkeitseigenschaft