SpotLight.OuterConeAngle Vlastnost

Definice

Obor názvů:

System.Windows.Media.Media3D

Sestavení:

PresentationCore.dll

Získá nebo nastaví úhel, který určuje poměr kuželové SpotLightprojekce, mimo kterou světlo nerozsvítí objekty ve scéně.

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

Hodnota vlastnosti

Double

Úhel ve stupních, který určuje poměr SpotLightkuželové projekce, mimo kterou světlo nerozsvítí objekty na scéně. Výchozí hodnota je 90.

Příklady

Následující příklad ukazuje, jak vytvořit prostorovou scénu SpotLight .

<!-- 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>

Následující kód ukazuje celou ukázku.

<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>

Poznámky

Intenzita osvětlení 'se snižuje od plného SpotLightosvětlení k žádnému v daném úhlu projekce světla mezi InnerConeAngle a OuterConeAngle. Světlo neposkytuje žádné osvětlení mimo úhel určený touto vlastností.

Informace o vlastnosti závislosti

Pole identifikátoru	OuterConeAngleProperty
Vlastnosti metadat nastavené na true	Žádné