Procedura: ridimensionare un modello tridimensionale
In questo esempio viene illustrata la procedura per ridimensionare un oggetto tridimensionale. Per ridimensionare un oggetto tridimensionale, utilizzare ScaleTransform3D. Le proprietà ScaleX, ScaleY e ScaleZ ridimensionano l'elemento con il fattore specificato. Ad esempio un valore ScaleX di 1,5 estende un oggetto fino al 150% della larghezza originale. Un valore ScaleY di 0,5 riduce l'altezza di un oggetto per il 50%. Nel codice riportato di seguito viene mostrato l'utilizzo di un oggetto ScaleTransform3D come valore per la trasformazione di GeometryModel3D.
<!-- Apply a scale transform to the object. You can transform the scale of the object
for the X, Y, or Z axis. The ScaleX, ScaleY, and ScaleZ properties resize the object
by the factor you specify. For example, a ScaleX value of 1.5 stretches the object to
150 percent of its original width. A ScaleY value of 0.5 shrinks the height of an object
by 50 percent. -->
<GeometryModel3D.Transform>
<!-- This Scale Transform stretches the object horizontally by 200 percent and shrinks it
vertically by 50 percent. -->
<ScaleTransform3D ScaleX="2" ScaleY="0.5" ScaleZ="1" CenterX="0" CenterY="0" CenterZ="0" />
</GeometryModel3D.Transform>
Esempio
Nel codice riportato di seguito viene illustrato l'esempio completo.
<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://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 specifes 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>
<!-- Apply a scale transform to the object. You can transform the scale of the object
for the X, Y, or Z axis. The ScaleX, ScaleY, and ScaleZ properties resize the object
by the factor you specify. For example, a ScaleX value of 1.5 stretches the object to
150 percent of its original width. A ScaleY value of 0.5 shrinks the height of an object
by 50 percent. -->
<GeometryModel3D.Transform>
<!-- This Scale Transform stretches the object horizontally by 200 percent and shrinks it
vertically by 50 percent. -->
<ScaleTransform3D ScaleX="2" ScaleY="0.5" ScaleZ="1" CenterX="0" CenterY="0" CenterZ="0" />
</GeometryModel3D.Transform>
</GeometryModel3D>
</ModelVisual3D.Content>
</ModelVisual3D>
</Viewport3D.Children>
</Viewport3D>
</Canvas>
</Viewbox>
</DockPanel>
</Page>
Vedere anche
Attività
Procedura: aggiungere un'animazione alle traslazioni tridimensionali
Procedura: creare una scena tridimensionale