mouse_take_point.rar_ITK

/* This example demonstrates cell picking using vtkCellPicker. It displays the results of picking using a vtkTextMapper. converted from TCL */ #include "vtkSphereSource.h" #include "vtkConeSource.h" #include "vtkPolyDataMapper.h" #include "vtkTextMapper.h" #include "vtkActor2D.h" #include "vtkRenderer.h" #include "vtkRenderWindow.h" #include "vtkRenderWindowInteractor.h" #include "vtkCamera.h" #include "vtkLODActor.h" #include "vtkGlyph3D.h" #include "vtkInteractorStyleTrackballCamera.h" #include "vtkCellPicker.h" #include "vtkTextProperty.h" #include "vtkCallbackCommand.h" int MouseMotion; vtkCellPicker *picker; vtkActor2D *textActor; vtkTextMapper *textMapper; vtkRenderer *ren1; vtkRenderWindow *renWin; vtkRenderWindowInteractor *iren; class PickCommand : public vtkCommand { public: static PickCommand *New() { return new PickCommand; } void Delete() { delete this; } virtual void Execute(vtkObject *caller, unsigned long l, void *callData) { if (picker->GetCellId() < 0 ) { textActor->VisibilityOff(); } else { double selpt[3]; picker->GetSelectionPoint(selpt); double x = selpt[0]; double y = selpt[1]; double pickPos[3]; picker->GetPickPosition( pickPos ); double xp = pickPos[0]; double yp = pickPos[1]; double zp = pickPos[2]; char text[120]; sprintf( text, "(%5.5f, %5.5f, %5.5f)", xp, yp, zp ); textMapper->SetInput( text ); textActor->SetPosition(x, y); textActor->VisibilityOn(); } renWin->Render(); } }; void PickerInteractionCallback( vtkObject* vtkNotUsed(object), unsigned long event, void* clientdata, void* vtkNotUsed(calldata) ) { vtkInteractorStyleTrackballCamera * style = (vtkInteractorStyleTrackballCamera*)clientdata; switch( event ) { case vtkCommand::LeftButtonPressEvent: MouseMotion = 0; style->OnLeftButtonDown(); break; case vtkCommand::LeftButtonReleaseEvent: if (MouseMotion == 0) { int *pick = iren->GetEventPosition(); picker->Pick((double)pick[0], (double)pick[1], 0.0, ren1); } style->OnLeftButtonUp(); break; case vtkCommand::MouseMoveEvent: MouseMotion = 1; style->OnMouseMove(); break; } } int main(int argc, char* argv) { MouseMotion = 0; vtkSphereSource *sphere = vtkSphereSource::New(); vtkPolyDataMapper *sphereMapper = vtkPolyDataMapper::New(); sphereMapper->SetInput(sphere->GetOutput()); sphereMapper->GlobalImmediateModeRenderingOn(); vtkLODActor *sphereActor = vtkLODActor::New(); sphereActor->SetMapper(sphereMapper); //设置spereActor； // create the spikes by glyphing the sphere with a cone. Create the mapper // and actor for the glyphs. vtkConeSource *cone = vtkConeSource::New(); vtkGlyph3D *glyph = vtkGlyph3D::New(); glyph->SetInput(sphere->GetOutput()); glyph->SetSource(cone->GetOutput()); glyph->SetVectorModeToUseNormal(); glyph->SetScaleModeToScaleByVector(); glyph->SetScaleFactor(0.25); vtkPolyDataMapper *spikeMapper = vtkPolyDataMapper::New(); spikeMapper->SetInput(glyph->GetOutput()); vtkLODActor *spikeActor = vtkLODActor::New(); spikeActor->SetMapper(spikeMapper); //设置spikerActor； PickCommand* pickObserver = PickCommand::New(); vtkCellPicker *picker = vtkCellPicker::New(); picker->AddObserver( vtkCommand::EndPickEvent, pickObserver ); //设置picker； vtkTextMapper *textMapper = vtkTextMapper::New(); vtkTextProperty *tprop = textMapper->GetTextProperty(); tprop->SetFontFamilyToArial(); tprop->SetFontSize(12); tprop->BoldOn(); tprop->SetColor(1, 0, 0); vtkActor2D *textActor = vtkActor2D::New(); textActor->VisibilityOff(); textActor->SetMapper(textMapper); //设置textActor； // Create the Renderer, RenderWindow, and RenderWindowInteractor vtkInteractorStyleTrackballCamera *style = vtkInteractorStyleTrackballCamera::New(); vtkCallbackCommand * pickerCommand = vtkCallbackCommand::New(); pickerCommand->SetClientData(style); pickerCommand->SetCallback(PickerInteractionCallback); style->AddObserver(vtkCommand::LeftButtonPressEvent, pickerCommand); style->AddObserver(vtkCommand::MouseMoveEvent, pickerCommand); style->AddObserver(vtkCommand::LeftButtonReleaseEvent, pickerCommand); //设置style； vtkRenderer *ren1 = vtkRenderer::New(); vtkRenderWindow *renWin = vtkRenderWindow::New(); renWin->AddRenderer(ren1); vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New(); iren->SetRenderWindow(renWin); iren->SetInteractorStyle(style); iren->SetPicker(picker); //设置iren； // Add the actors to the renderer, set the background and size ren1->AddActor2D(textActor); ren1->AddActor(sphereActor); ren1->AddActor(spikeActor); ren1->SetBackground(1, 1, 1); //设置ren1； renWin->SetSize(300, 300); // Get the camera and zoom in closer to the image. vtkCamera *cam1 = ren1->GetActiveCamera(); cam1->Zoom(1.4); iren->Initialize(); iren->Start(); picker->RemoveObserver( pickObserver ); sphere->Delete(); sphereMapper->Delete(); sphereActor->Delete(); cone->Delete(); glyph->Delete(); spikeMapper->Delete(); spikeActor->Delete(); picker->Delete(); textMapper->Delete(); textActor->Delete(); pickerCommand->Delete(); style->Delete(); ren1->Delete(); renWin->Delete(); pickObserver->Delete(); iren->Delete(); }