PerspectiveCamera 类
定义
重要
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表示透视投影摄像机。
public ref class PerspectiveCamera sealed : System::Windows::Media::Media3D::ProjectionCamerapublic sealed class PerspectiveCamera : System.Windows.Media.Media3D.ProjectionCameratype PerspectiveCamera = class
inherit ProjectionCameraPublic NotInheritable Class PerspectiveCamera
Inherits ProjectionCamera- 继承
-
PerspectiveCamera
示例
<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>
注解
PerspectiveCamera 指定 3D 模型到 2D 视觉图面的投影。 此投影包括透视投影。 换句话说， PerspectiveCamera 描述了一个边缘向地平线上的某个点收敛的边缘。 离相机更近的对象看起来更大，离相机较远的对象看起来更小。
下图显示了正交投影和透视前凸起相机投影之间的差异。
构造函数
| PerspectiveCamera() |
初始化 PerspectiveCamera 类的新实例。 |
| PerspectiveCamera(Point3D, Vector3D, Vector3D, Double) |
使用指定的位置、方向和视角初始化 PerspectiveCamera 类的新实例。 |
字段
| FieldOfViewProperty |
标识 FieldOfView 依赖项属性。 |
属性
| CanFreeze |
获取一个值，该值指示是否可将对象变为不可修改。 (继承自 Freezable) |
| DependencyObjectType |
获取 DependencyObjectType 包装此实例的 CLR 类型的 。 (继承自 DependencyObject) |
| Dispatcher |
获取与此 Dispatcher 关联的 DispatcherObject。 (继承自 DispatcherObject) |
| FarPlaneDistance |
获取或设置一个值，该值指定到照相机远端剪裁平面的照相机的距离。 (继承自 ProjectionCamera) |
| FieldOfView |
获取或设置一个值，该值表示摄像机的水平视角。 |
| HasAnimatedProperties |
获取一个值，该值指示一个或多个 AnimationClock 对象是否与此对象的任何依赖项属性相关联。 (继承自 Animatable) |
| IsFrozen |
获取一个值，该值指示对象当前是否可修改。 (继承自 Freezable) |
| IsSealed |
获取一个值，该值指示此实例当前是否为密封的（只读）。 (继承自 DependencyObject) |
| LookDirection |
获取或设置定义摄像机在世界坐标中的拍摄方向的 Vector3D。 (继承自 ProjectionCamera) |
| NearPlaneDistance |
获取或设置一个值，该值指定到照相机近端剪裁平面的照相机的距离。 (继承自 ProjectionCamera) |
| Position |
获取或设置以世界坐标表示的摄像机位置。 (继承自 ProjectionCamera) |
| Transform |
获取或设置应用于摄像机的 Transform3D。 (继承自 Camera) |
| UpDirection |
获取或设置定义摄像机向上方向的 Vector3D。 (继承自 ProjectionCamera) |
方法
事件
| Changed |
在修改 Freezable 或其包含的对象时发生。 (继承自 Freezable) |
显式接口实现
| IFormattable.ToString(String, IFormatProvider) |
使用指定格式对当前实例的值设置格式。 (继承自 Camera) |
