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IAgStkGraphicsPickResult Interface





Description

A single result from Scene.Pick.

Object Model


Public Properties

Public Property Depth Gets the depth of the picked location in the 3D scene.
Public Property Objects Gets a collection of objects that were on the pick stack for the picked object.
Public Property Position Gets the position of the picked location in the central body's fixed reference frame. The array contains the components of the position arranged in the order x, y, z.

Example

Change a model's color on mouse over
[C#] Copy Code
// 
// Get a collection of picked objects under the mouse location. 
// The collection is sorted with the closest object at index zero. 
// 
IAgStkGraphicsPickResultCollection collection = scene.Pick(mouseX, mouseY); 
if (collection.Count != 0) 
{ 
    IAgStkGraphicsObjectCollection objects = collection[0].Objects; 
    IAgStkGraphicsCompositePrimitive composite = objects[0] as IAgStkGraphicsCompositePrimitive; 
 
    // 
    // Was a model in our composite picked? 
    // 
    if (composite == m_Models) 
    { 
        IAgStkGraphicsPrimitive model = objects[1] as IAgStkGraphicsPrimitive; 
 
        // 
        // Selected Model 
        // 
        model.Color = Color.Cyan; 
 
        if (model != m_SelectedModel) 
        { 
            // 
            // Unselect previous model 
            // 
            if (m_SelectedModel != null) 
            { 
                m_SelectedModel.Color = Color.Red; 
            } 
            m_SelectedModel = model; 
            scene.Render(); 
        } 
        return; 
   } 
} 
 
// 
// Unselect previous model 
// 
if (m_SelectedModel != null) 
{ 
    m_SelectedModel.Color = Color.Red; 
    m_SelectedModel = null; 
    scene.Render(); 
} 
 
Zoom to a particular marker in a batch
[C#] Copy Code
Array selectedMarkerCartesianPosition = null; 
// 
// Get a collection of picked objects under the mouse location. 
// The collection is sorted with the closest object at index zero. 
// 
IAgStkGraphicsPickResultCollection collection = scene.Pick(mouseX, mouseY); 
if (collection.Count != 0) 
{ 
    IAgStkGraphicsObjectCollection objects = collection[0].Objects; 
    IAgStkGraphicsMarkerBatchPrimitive batchPrimitive = objects[0] as IAgStkGraphicsMarkerBatchPrimitive; 
 
    // 
    // Was a marker in our marker batch picked? 
    // 
    if (batchPrimitive == m_MarkerBatch) 
    { 
        // 
        // Get the index of the particular marker we picked 
        // 
        IAgStkGraphicsBatchPrimitiveIndex markerIndex = objects[1] as IAgStkGraphicsBatchPrimitiveIndex; 
 
        // 
        // Get the position of the particular marker we picked 
        // 
        Array markerCartographic = markerPositions[markerIndex.Index]; 
 
        IAgPosition markerPosition = root.ConversionUtility.NewPositionOnEarth(); 
        markerPosition.AssignPlanetodetic( 
            (double)markerCartographic.GetValue(0), 
            (double)markerCartographic.GetValue(1), 
            (double)markerCartographic.GetValue(2)); 
 
        double x, y, z; 
        markerPosition.QueryCartesian(out x, out y, out z); 
 
        selectedMarkerCartesianPosition = new object[] { x, y, z }; 
    } 
} 
 
 
IAgStkGraphicsSceneManager manager = ((IAgScenario)root.CurrentScenario).SceneManager; 
 
IList<Array> positions = new List<Array>(); 
positions.Add(new object[] {39.88, -75.25, 3000.0 }); 
positions.Add(new object[] {38.85, -77.04, 3000.0 }); 
positions.Add(new object[] {38.85, -77.04, 0.0 }); 
positions.Add(new object[] {29.98, -90.25, 0.0 }); 
positions.Add(new object[] {37.37, -121.92, 0.0 }); 
 
Array positionsArray = Array.CreateInstance(typeof(object), positions.Count * 3); 
for (int i = 0; i < positions.Count; ++i) 
{ 
    Array position = positions[i]; 
    position.CopyTo(positionsArray, i * 3); 
} 
 
IAgStkGraphicsMarkerBatchPrimitive markerBatch = manager.Initializers.MarkerBatchPrimitive.Initialize(); 
markerBatch.Texture = manager.Textures.LoadFromStringUri( 
    markerFile); 
markerBatch.SetCartographic("Earth", ref positionsArray); 
 
// Save the positions of the markers for use in the pick event 
markerPositions = positions; 
 
// Enable per item picking 
markerBatch.PerItemPickingEnabled = true; 
 
manager.Primitives.Add((IAgStkGraphicsPrimitive)markerBatch); 
 
Change model colors within a rectangular region
[C#] Copy Code
IAgStkGraphicsSceneManager manager = ((IAgScenario)root.CurrentScenario).SceneManager; 
// 
// Get a collection of picked objects in a 100 by 100 rectangular region. 
// The collection is sorted with the closest object at index zero. 
// 
List<IAgStkGraphicsModelPrimitive> newModels = new List<IAgStkGraphicsModelPrimitive>(); 
IAgStkGraphicsPickResultCollection collection = scene.PickRectangular(mouseX - 50, mouseY + 50, mouseX + 50, mouseY - 50); 
foreach (IAgStkGraphicsPickResult pickResult in collection) 
{ 
    IAgStkGraphicsObjectCollection objects = pickResult.Objects; 
    IAgStkGraphicsCompositePrimitive composite = objects[0] as IAgStkGraphicsCompositePrimitive; 
 
    // 
    // Was a model in our composite picked? 
    // 
    if (composite == m_Models) 
    { 
        IAgStkGraphicsModelPrimitive model = objects[1] as IAgStkGraphicsModelPrimitive; 
 
        // 
        // Selected Model 
        // 
        ((IAgStkGraphicsPrimitive)model).Color = Color.Cyan; 
        newModels.Add(model); 
    } 
} 
// 
// Reset color of models that were previous selected but were not in this pick. 
// 
foreach (IAgStkGraphicsModelPrimitive selectedModel in SelectedModels) 
{ 
    if (!newModels.Contains(selectedModel)) 
    { 
        ((IAgStkGraphicsPrimitive)selectedModel).Color = Color.Red; 
    } 
} 
SelectedModels = newModels; 
 
manager.Render(); 
 
 
Zoom to a model on double click
[C#] Copy Code
IAgStkGraphicsPrimitive selectedModel = null; 
// 
// Get a collection of picked objects under the mouse location. 
// The collection is sorted with the closest object at index zero. 
// 
IAgStkGraphicsPickResultCollection collection = scene.Pick(mouseX, mouseY); 
if (collection.Count != 0) 
{ 
    IAgStkGraphicsObjectCollection objects = collection[0].Objects; 
    IAgStkGraphicsCompositePrimitive composite = objects[0] as IAgStkGraphicsCompositePrimitive; 
 
    // 
    // Was a model in our composite picked? 
    // 
    if (composite == m_Models) 
    { 
        selectedModel = objects[1] as IAgStkGraphicsPrimitive; 
    } 
} 
 
Change a model's color on mouse over
[Visual Basic .NET] Copy Code
'
' Get a collection of picked objects under the mouse location.
' The collection is sorted with the closest object at index zero.
'
            Dim collection As IAgStkGraphicsPickResultCollection = scene.Pick(mouseX, mouseY)
If collection.Count <> 0 Then
    Dim objects As IAgStkGraphicsObjectCollection = collection(0).Objects
    Dim composite As IAgStkGraphicsCompositePrimitive = TryCast(objects(0), IAgStkGraphicsCompositePrimitive)

    '
    ' Was a model in our composite picked?
    '
                If composite Is m_Models Then
                    Dim model As IAgStkGraphicsPrimitive = TryCast(objects(1), IAgStkGraphicsPrimitive)

                    '
                    ' Selected Model
                    '
                    model.Color = Color.Cyan

                    If model IsNot m_SelectedModel Then
                        '
                        ' Unselect previous model
                        '
                        If m_SelectedModel IsNot Nothing Then
                            m_SelectedModel.Color = Color.Red
                        End If
                        m_SelectedModel = model
                        scene.Render()
                    End If
                    Return
                End If
End If

'
' Unselect previous model
'
If m_SelectedModel IsNot Nothing Then
                m_SelectedModel.Color = Color.Red
    m_SelectedModel = Nothing
    scene.Render()
Zoom to a particular marker in a batch
[Visual Basic .NET] Copy Code
Dim selectedMarkerCartesianPosition As Array = Nothing
'
' Get a collection of picked objects under the mouse location.
' The collection is sorted with the closest object at index zero.
'
Dim collection As IAgStkGraphicsPickResultCollection = scene.Pick(mouseX, mouseY)
If collection.Count <> 0 Then
    Dim objects As IAgStkGraphicsObjectCollection = collection(0).Objects
    Dim batchPrimitive As IAgStkGraphicsMarkerBatchPrimitive = TryCast(objects(0), IAgStkGraphicsMarkerBatchPrimitive)

    '
    ' Was a marker in our marker batch picked?
    '
    If batchPrimitive Is m_MarkerBatch Then
        '
        ' Get the index of the particular marker we picked
        '
        Dim markerIndex As IAgStkGraphicsBatchPrimitiveIndex = TryCast(objects(1), IAgStkGraphicsBatchPrimitiveIndex)
        '
        ' Get the position of the particular marker we picked
        '
        Dim markerCartographic As Array = markerPositions(markerIndex.Index)

        Dim markerPosition As IAgPosition = root.ConversionUtility.NewPositionOnEarth()
        markerPosition.AssignPlanetodetic(CDbl(markerCartographic.GetValue(0)), CDbl(markerCartographic.GetValue(1)), CDbl(markerCartographic.GetValue(2)))

        Dim x As Double, y As Double, z As Double
        markerPosition.QueryCartesian(x, y, z)

        selectedMarkerCartesianPosition = New Object() {x, y, z}
    End If
End If


Dim manager As IAgStkGraphicsSceneManager = DirectCast(root.CurrentScenario, IAgScenario).SceneManager

Dim positions As IList(Of Array) = New List(Of Array)()
positions.Add(New Object() {39.88, -75.25, 3000.0})
positions.Add(New Object() {38.85, -77.04, 3000.0})
positions.Add(New Object() {38.85, -77.04, 0.0})
positions.Add(New Object() {29.98, -90.25, 0.0})
positions.Add(New Object() {37.37, -121.92, 0.0})

Dim positionsArray As Array = Array.CreateInstance(GetType(Object), positions.Count * 3)
For i As Integer = 0 To positions.Count - 1
    Dim position As Array = positions(i)
    position.CopyTo(positionsArray, i * 3)
Next

Dim markerBatch As IAgStkGraphicsMarkerBatchPrimitive = manager.Initializers.MarkerBatchPrimitive.Initialize()
markerBatch.Texture = manager.Textures.LoadFromStringUri( _
    markerFile)
markerBatch.SetCartographic("Earth", positionsArray)

' Save the positions of the markers for use in the pick event
markerPositions = positions
' Enable per item picking
markerBatch.PerItemPickingEnabled = True

manager.Primitives.Add(DirectCast(markerBatch, IAgStkGraphicsPrimitive))
Change model colors within a rectangular region
[Visual Basic .NET] Copy Code
Dim manager As IAgStkGraphicsSceneManager = DirectCast(root.CurrentScenario, IAgScenario).SceneManager
'
' Get a collection of picked objects in a 100 by 100 rectangular region.
' The collection is sorted with the closest object at index zero.
'
Dim newModels As New List(Of IAgStkGraphicsModelPrimitive)()
Dim collection As IAgStkGraphicsPickResultCollection = scene.PickRectangular(mouseX - 50, mouseY + 50, mouseX + 50, mouseY - 50)
For Each pickResult As IAgStkGraphicsPickResult In collection
    Dim objects As IAgStkGraphicsObjectCollection = pickResult.Objects
    Dim composite As IAgStkGraphicsCompositePrimitive = TryCast(objects(0), IAgStkGraphicsCompositePrimitive)

    '
    ' Was a model in our composite picked?
    '
    If composite Is m_Models Then
        Dim model As IAgStkGraphicsModelPrimitive = TryCast(objects(1), IAgStkGraphicsModelPrimitive)

        '
        ' Selected Model
        '
        DirectCast(model, IAgStkGraphicsPrimitive).Color = Color.Cyan
        newModels.Add(model)
    End If
Next
'
' Reset color of models that were previous selected but were not in this pick.
'
For Each selectedModel As IAgStkGraphicsModelPrimitive In SelectedModels
    If Not newModels.Contains(selectedModel) Then
        DirectCast(selectedModel, IAgStkGraphicsPrimitive).Color = Color.Red
    End If
Next
SelectedModels = newModels
Zoom to a model on double click
[Visual Basic .NET] Copy Code
Dim selectedModel As IAgStkGraphicsPrimitive = Nothing
'
' Get a collection of picked objects under the mouse location.
' The collection is sorted with the closest object at index zero.
'
Dim collection As IAgStkGraphicsPickResultCollection = scene.Pick(mouseX, mouseY)
If collection.Count <> 0 Then
    Dim objects As IAgStkGraphicsObjectCollection = collection(0).Objects
    Dim composite As IAgStkGraphicsCompositePrimitive = TryCast(objects(0), IAgStkGraphicsCompositePrimitive)

    '
    ' Was a model in our composite picked?
    '
    If composite Is m_Models Then
        selectedModel = TryCast(objects(1), IAgStkGraphicsPrimitive)
    End If

See Also

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STK Programming Interface 11.0.1