RayHitTestParameters.Direction Property

Reference

Definition

Namespace:: System.Windows.Media.Media3D

Assembly:: PresentationCore.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets a Vector3D that indicates the direction (from its origin) of the ray along which to hit test.

public:
 property System::Windows::Media::Media3D::Vector3D Direction { System::Windows::Media::Media3D::Vector3D get(); };

public System.Windows.Media.Media3D.Vector3D Direction { get; }

member this.Direction : System.Windows.Media.Media3D.Vector3D

Public ReadOnly Property Direction As Vector3D

Property Value

Vector3D

Vector3D that indicates the direction of the ray along which to hit test.

Examples

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)

Remarks

Note that the visual layer supports hit testing against all objects under a point or geometry, not just the topmost object. A 2D hit test will also return 3D results directly under the specified point or geometry.

Applies to

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