TargetCenter.vb
' Copyright 2012 ESRI ' ' All rights reserved under the copyright laws of the United States ' and applicable international laws, treaties, and conventions. ' ' You may freely redistribute and use this sample code, with or ' without modification, provided you include the original copyright ' notice and use restrictions. ' ' See the use restrictions. ' Imports ESRI.ArcGIS.Analyst3D Imports ESRI.ArcGIS.GeomeTry Imports ESRI.ArcGIS.Controls Imports ESRI.ArcGIS.ADF.BaseClasses Imports ESRI.ArcGIS.ADF.CATIDs Imports System.Runtime.InteropServices <ComClass(TargetCenter.ClassId, TargetCenter.InterfaceId, TargetCenter.EventsId)> _ Public NotInheritable Class TargetCenter Inherits BaseTool #Region "COM GUIDs" ' These GUIDs provide the COM identity for this class ' and its COM interfaces. If you change them, existing ' clients will no longer be able to access the class. Public Const ClassId As String = "5A168A30-31A4-4971-9595-59B648BD2783" Public Const InterfaceId As String = "D6F30DFD-6010-4526-927A-D62FADE076D0" Public Const EventsId As String = "89FE92A8-76B0-4FF1-925E-3E535982329B" #End Region #Region "COM Registration Function(s)" <ComRegisterFunction(), ComVisibleAttribute(False)> _ Public Shared Sub RegisterFunction(ByVal registerType As Type) ' Required for ArcGIS Component Category Registrar support ArcGISCategoryRegistration(registerType) 'Add any COM registration code after the ArcGISCategoryRegistration() call End Sub <ComUnregisterFunction(), ComVisibleAttribute(False)> _ Public Shared Sub UnregisterFunction(ByVal registerType As Type) ' Required for ArcGIS Component Category Registrar support ArcGISCategoryUnregistration(registerType) 'Add any COM unregistration code after the ArcGISCategoryUnregistration() call End Sub #Region "ArcGIS Component Category Registrar generated code" ''' <summary> ''' Required method for ArcGIS Component Category registration - ''' Do not modify the contents of this method with the code editor. ''' </summary> Private Shared Sub ArcGISCategoryRegistration(ByVal registerType As Type) Dim regKey As String = String.Format("HKEY_CLASSES_ROOT\CLSID\{{{0}}}", registerType.GUID) ControlsCommands.Register(regKey) End Sub ''' <summary> ''' Required method for ArcGIS Component Category unregistration - ''' Do not modify the contents of this method with the code editor. ''' </summary> Private Shared Sub ArcGISCategoryUnregistration(ByVal registerType As Type) Dim regKey As String = String.Format("HKEY_CLASSES_ROOT\CLSID\{{{0}}}", registerType.GUID) ControlsCommands.Unregister(regKey) End Sub #End Region #End Region Private m_pCursor As System.Windows.Forms.Cursor Private m_pSceneHookHelper As ISceneHookHelper ' A creatable COM class must have a Public Sub New() ' with no parameters, otherwise, the class will not be ' registered in the COM registry and cannot be created ' via CreateObject. Public Sub New() MyBase.New() MyBase.m_category = "Sample_SceneControl(VB.NET)" MyBase.m_caption = "Target Center" MyBase.m_toolTip = "Center on Target" MyBase.m_name = "Sample_SceneControl(VB.NET)/TargetCenter" MyBase.m_message = "Center view at selected target" 'Load resources Dim res() As String = GetType(TargetCenter).Assembly.GetManifestResourceNames() If res.GetLength(0) > 0 Then MyBase.m_bitmap = New System.Drawing.Bitmap(GetType(TargetCenter).Assembly.GetManifestResourceStream("SceneToolsVB.TargetCenter.bmp")) End If m_pCursor = New System.Windows.Forms.Cursor(GetType(TargetCenter).Assembly.GetManifestResourceStream("SceneToolsVB.targetcenter.cur")) m_pSceneHookHelper = New SceneHookHelperClass End Sub Public Overrides Sub OnCreate(ByVal hook As Object) m_pSceneHookHelper.Hook = hook End Sub Public Overrides ReadOnly Property Enabled() As Boolean Get If (m_pSceneHookHelper.Scene Is Nothing) Then Return False Else Return True End If End Get End Property Public Overrides ReadOnly Property Cursor() As Integer Get Return m_pCursor.Handle.ToInt32() End Get End Property Public Overrides Function Deactivate() As Boolean Return True End Function Public Overrides Sub OnMouseUp(ByVal Button As Integer, ByVal Shift As Integer, ByVal X As Integer, ByVal Y As Integer) 'Get the scene graph Dim pSceneGraph As ISceneGraph = CType(m_pSceneHookHelper.SceneGraph, ISceneGraph) Dim pNewTgt As IPoint = Nothing Dim pOwner As Object = Nothing, pObject As Object = Nothing 'Translate screen coordinates into a 3D point pSceneGraph.Locate(pSceneGraph.ActiveViewer, X, Y, esriScenePickMode.esriScenePickAll, True, pNewTgt, pOwner, pObject) If (pNewTgt Is Nothing) Then Return End If 'Get the scene viewer's camera Dim pCamera As ICamera = CType(m_pSceneHookHelper.Camera, ICamera) 'If orthographic (2D) view If (pCamera.ProjectionType = esri3DProjectionType.esriOrthoProjection) Then 'Set the camera's new target pCamera.Target = pNewTgt 'Redraw the scene viewer pSceneGraph.ActiveViewer.Redraw(True) Else 'Get the camera's old target and observer Dim pOldTgt, pOldObs As IPoint pOldTgt = pCamera.Target pOldObs = pCamera.Observer 'Set the camera's new target and get the new observer pCamera.Target = pNewTgt pCamera.PolarUpdate(1, 0, 0, True) Dim pNewObs As IPoint = CType(pCamera.Observer, IPoint) 'Get the duration in seconds of last redraw 'and the average number of frames per second Dim dlastFrameDuration, dMeanFrameRate As Double pSceneGraph.GetDrawingTimeInfo(dlastFrameDuration, dMeanFrameRate) If (dlastFrameDuration < 0.01) Then dlastFrameDuration = 0.01 End If Dim iSteps As Integer iSteps = 2 / dlastFrameDuration If (iSteps < 1) Then iSteps = 1 End If If (iSteps > 60) Then iSteps = 60 End If Dim dxObs, dyObs, dzObs As Double Dim dxTgt, dyTgt, dzTgt As Double dxObs = (pNewObs.X - pOldObs.X) / iSteps dyObs = (pNewObs.Y - pOldObs.Y) / iSteps dzObs = (pNewObs.Z - pOldObs.Z) / iSteps dxTgt = (pNewTgt.X - pOldTgt.X) / iSteps dyTgt = (pNewTgt.Y - pOldTgt.Y) / iSteps dzTgt = (pNewTgt.Z - pOldTgt.Z) / iSteps 'Loop through each step moving the camera's observer and target from the 'old positions to the new positions, refreshing the scene viewer each time Dim i As Integer For i = 0 To iSteps pNewObs.X = pOldObs.X + (i * dxObs) pNewObs.Y = pOldObs.Y + (i * dyObs) pNewObs.Z = pOldObs.Z + (i * dzObs) pNewTgt.X = pOldTgt.X + (i * dxTgt) pNewTgt.Y = pOldTgt.Y + (i * dyTgt) pNewTgt.Z = pOldTgt.Z + (i * dzTgt) pCamera.Observer = pNewObs pCamera.Target = pNewTgt pSceneGraph.ActiveViewer.Redraw(True) Next i End If End Sub End Class