本人将《The VTK User’s Guide 11th Edition 》中的TCL编写的例程进行了C++的转换，使用的平台是VS2015，VTK版本是8.0.1。之所以贴出来，以求方便大家使用C++来进行VTK的研究。
VTK/Examples/Annotation/Tcl/annotatePick.tcl.之 转成C++
1 #include "vtkAutoInit.h" 2 #include "vtkRenderer.h" 3 #include "vtkRenderWindow.h" 4 #include "vtkRenderWindowInteractor.h" 5 #include "vtkSmartPointer.h" 6 #include "vtkSphereSource.h" 7 #include "vtkPolyDataMapper.h" 8 #include "vtkLODActor.h" 9 #include "vtkConeSource.h" 10 #include "vtkGlyph3D.h" 11 #include "vtkCallbackCommand.h" 12 #include "vtkCommand.h" 13 #include "vtkCellPicker.h" 14 #include "vtkTextMapper.h" 15 #include "vtkTextProperty.h" 16 #include "vtkActor2D.h" 17 #include "vtkCamera.h" 18 #include "vtkAbstractPicker.h" 19 #include "vtkPoints.h" 20 #include "vtkObject.h" 21 22 static vtkSmartPointer<vtkCellPicker> picker1; 23 static vtkSmartPointer<vtkTextMapper> textMapper; 24 static vtkSmartPointer<vtkActor2D> textActor; 25 static vtkSmartPointer<vtkPoints> pickPos; 26 static vtkSmartPointer<vtkRenderWindow> renWin; 27 static double *selPt; 28 static double x; 29 static double y; 30 static double xp; 31 static double yp; 32 static double zp; 33 34 void myCallbackFunction(vtkObject* caller, long unsigned int eventId, void* clientData, void* callData) 35 { 36 picker1 = (vtkCellPicker*)clientData; 37 if (picker1->GetCellId() < 0) 38 { 39 textActor->VisibilityOff(); 40 } 41 else 42 { 43 selPt = picker1->GetSelectionPoint(); 44 x = *selPt; 45 y = *(selPt + 1); 46 pickPos = picker1->GetPickedPositions(); 47 xp = *(pickPos->GetPoint(0)); 48 yp = *(pickPos->GetPoint(0)+1); 49 zp = *(pickPos->GetPoint(0)+2); 50 char str[50]; 51 sprintf_s(str, "%f,%f,%f", xp, yp, zp); 52 textMapper->SetInput(str); 53 textActor->SetPosition(x, y); 54 textActor->VisibilityOn(); 55 } 56 57 renWin->Render(); 58 } 59 60 int main() 61 { 62 VTK_MODULE_INIT(vtkRenderingOpenGL2); 63 VTK_MODULE_INIT(vtkRenderingFreeType); 64 VTK_MODULE_INIT(vtkInteractionStyle); 65 66 //# create a sphere source, mapper, and actor 67 vtkSmartPointer<vtkSphereSource> sphere = vtkSmartPointer<vtkSphereSource>::New(); 68 vtkSmartPointer<vtkPolyDataMapper> sphereMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); 69 sphereMapper->SetInputConnection(sphere->GetOutputPort()); 70 sphereMapper->GlobalImmediateModeRenderingOn(); 71 vtkSmartPointer<vtkLODActor> sphereActor = vtkSmartPointer<vtkLODActor>::New(); 72 sphereActor->SetMapper(sphereMapper); 73 74 //# create the spikes by glyphing the sphere with a cone.Create the mapper 75 //# and actor for the glyphs. 76 vtkSmartPointer<vtkConeSource> cone = vtkSmartPointer<vtkConeSource>::New(); 77 vtkSmartPointer<vtkGlyph3D> glyph = vtkSmartPointer<vtkGlyph3D>::New(); 78 glyph->SetInputConnection(sphere->GetOutputPort()); 79 glyph->SetSourceConnection(cone->GetOutputPort()); 80 glyph->SetVectorModeToUseNormal(); 81 glyph->SetScaleModeToScaleByVector(); 82 glyph->SetScaleFactor(0.25); 83 vtkSmartPointer<vtkPolyDataMapper> spikeMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); 84 spikeMapper->SetInputConnection(glyph->GetOutputPort()); 85 vtkSmartPointer<vtkLODActor> spikeActor = vtkSmartPointer<vtkLODActor>::New(); 86 spikeActor->SetMapper(spikeMapper); 87 88 //# Create a cell picker. 89 vtkSmartPointer<vtkCellPicker> picker = vtkSmartPointer<vtkCellPicker>::New(); 90 vtkSmartPointer<vtkCallbackCommand> annotatePick = vtkSmartPointer<vtkCallbackCommand>::New(); 91 annotatePick->SetCallback(myCallbackFunction); 92 annotatePick->SetClientData(picker); 93 picker->AddObserver(vtkCommand::EndPickEvent, annotatePick); 94 95 //# Create a text mapper and actor to display the results of picking. 96 textMapper = vtkSmartPointer<vtkTextMapper>::New(); 97 textMapper->GetTextProperty()->SetFontFamilyToArial(); 98 textMapper->GetTextProperty()->SetFontSize(10); 99 textMapper->GetTextProperty()->BoldOn(); 100 textMapper->GetTextProperty()->ShadowOn(); 101 textMapper->GetTextProperty()->SetColor(1, 0, 0); 102 textActor = vtkSmartPointer<vtkActor2D>::New(); 103 textActor->VisibilityOff(); 104 textActor->SetMapper(textMapper); 105 106 //Create the Renderer, RenderWindow, RenderWindowInteractor 107 vtkSmartPointer<vtkRenderer> ren1 = vtkSmartPointer<vtkRenderer>::New(); 108 renWin = vtkSmartPointer<vtkRenderWindow>::New(); 109 renWin->AddRenderer(ren1); 110 vtkSmartPointer<vtkRenderWindowInteractor> iren = vtkSmartPointer<vtkRenderWindowInteractor>::New(); 111 iren->SetRenderWindow(renWin); 112 iren->SetPicker(picker); 113 114 //Add the actors to the renderer, set the background and size 115 ren1->AddActor2D(textActor); 116 ren1->AddActor(sphereActor); 117 ren1->AddActor(spikeActor); 118 ren1->SetBackground(1, 1, 1); 119 renWin->SetSize(300, 300); 120 ren1->ResetCamera(); 121 ren1->GetActiveCamera()->Zoom(1.4); 122 123 //# Pick the cell at this location. 124 picker->Pick(85.0, 126.0, 0, ren1); 125 126 iren->Start(); 127 return 0; 128 }