通过

RayHitTestParameters.Origin 属性

  • 参考

定义

命名空间:
System.Windows.Media.Media3D
程序集:
PresentationCore.dll

获取沿其执行命中测试的射线的原点。

public:
 property System::Windows::Media::Media3D::Point3D Origin { System::Windows::Media::Media3D::Point3D get(); };
public System.Windows.Media.Media3D.Point3D Origin { get; }
member this.Origin : System.Windows.Media.Media3D.Point3D
Public ReadOnly Property Origin As Point3D

属性值

Point3D

沿其执行命中测试的射线的原点。

示例

public void HitTest(object sender, System.Windows.Input.MouseButtonEventArgs args)
{
    Point mouseposition = args.GetPosition(myViewport);
    Point3D testpoint3D = new Point3D(mouseposition.X, mouseposition.Y, 0);
    Vector3D testdirection = new Vector3D(mouseposition.X, mouseposition.Y, 10);
    PointHitTestParameters pointparams = new PointHitTestParameters(mouseposition);
    RayHitTestParameters rayparams = new RayHitTestParameters(testpoint3D, testdirection);

    //test for a result in the Viewport3D
    VisualTreeHelper.HitTest(myViewport, null, HTResult, pointparams);

Public Sub HitTest(ByVal sender As Object, ByVal args As MouseButtonEventArgs)
    Dim mouseposition As Point = args.GetPosition(myViewport)
    Dim testpoint3D As New Point3D(mouseposition.X, mouseposition.Y, 0)
    Dim testdirection As New Vector3D(mouseposition.X, mouseposition.Y, 10)
    Dim pointparams As New PointHitTestParameters(mouseposition)
    Dim rayparams As New RayHitTestParameters(testpoint3D, testdirection)

    'test for a result in the Viewport3D
    VisualTreeHelper.HitTest(myViewport, Nothing, AddressOf HTResult, pointparams)

注解

请注意，视觉层支持对点或几何图形下的所有对象进行命中测试，而不仅仅是最顶层的对象。 2D 命中测试还将直接在指定的点或几何图形下返回 3D 结果。

适用于

另请参阅