VTK例子14-point picker(拾取多个点)
point picker(拾取多个点)#include "stdafx.h" #include "vtkPolyDataMapper.h" #include "vtkRenderer.h" #include "vtkRenderWindow.h" #include "vtkWin32RenderWindowInteractor.h" #include "vtkActor.h" #include "vtkPointPicker.h" #include "vtkSphereSource.h" #include "vtkGlyph3D.h" #include "vtkSelectPolyData.h" #include "vtkClipPolyData.h" #include<stdio.h> #include<ctype.h> //#include<iostream.h> #include<vtkConeSource.h> #include<vtkPolyDataNormals.h> #include<vtkProperty.h> #include<vtkSphereSource.h> #include<vtkGlyph3D.h> #include<vtkRenderWindowInteractor.h> #include<vtkCallbackCommand.h> static void pickControl(void *); static vtkRenderer *ren1; static vtkRenderWindow *renWin; static vtkPoints *points; static int n, p; vtkPolyData *PolyData = vtkPolyData::New();vtkRenderWindowInteractor*iren;void pickControl(vtkObject *caller, unsigned long eid, void *clientdata, void *calldata);void main( int argc, char *argv[] ) { ren1 = vtkRenderer::New(); renWin = vtkRenderWindow::New(); renWin->AddRenderer(ren1); iren = vtkRenderWindowInteractor::New(); n=0; p=0; vtkPointPicker *pointpicker = vtkPointPicker::New(); vtkSphereSource *sphere = vtkSphereSource::New(); sphere->SetThetaResolution(50); sphere->SetPhiResolution(50);vtkPolyDataMapper *sphereMapper = vtkPolyDataMapper::New(); sphereMapper->SetInput(sphere->GetOutput());vtkActor *sphereActor = vtkActor::New(); sphereActor->SetMapper(sphereMapper);sphereActor->GetProperty()->SetColor(0.8,0.1,0.8);/*vtkConeSource *cone = vtkConeSource::New(); cone->SetResolution(20);vtkGlyph3D *glyph = vtkGlyph3D::New(); glyph->SetInput((vtkDataSet *)sphere->GetOutput()); glyph->SetSource(cone->GetOutput()); glyph->SetVectorModeToUseNormal(); glyph->SetScaleModeToScaleByVector(); glyph->SetScaleFactor(0.25);vtkPolyDataMapper *spikeMapper = vtkPolyDataMapper::New(); spikeMapper->SetInput(glyph->GetOutput());vtkActor *spikeActor = vtkActor::New(); spikeActor->SetMapper(spikeMapper); *////////////////////////////// iren->SetRenderWindow(renWin); iren->SetPicker(pointpicker); //iren->SetUserMethod(vtkCommand::pickControl, (void *)iren); vtkCallbackCommand * cmd = vtkCallbackCommand::New(); cmd->SetCallback(pickControl); pointpicker->AddObserver(vtkCommand::EndPickEvent, cmd); ren1->AddActor(sphereActor);//ren1->AddActor(spikeActor); ren1->SetBackground(0, 0, 0); renWin->SetSize(500,500); iren->Initialize(); renWin->Render(); iren->Start(); ren1->Delete(); renWin->Delete(); iren->Delete(); pointpicker->Delete(); } // Define picking method void pickControl(vtkObject *caller, unsigned long eid, void *clientdata, void *calldata) { double *selPt; double *pickpos; double *pc; int i; //vtkRenderWindowInteractor *iren = (vtkRenderWindowInteractor *)arg; vtkPointPicker *pointpicker = (vtkPointPicker *)iren->GetPicker(); selPt = pointpicker->GetSelectionPoint(); cout<<"Screen location:"<<selPt<<" "<<selPt<<"\n"; if ( pointpicker->GetPointId() >= 0 ) { p = p+1; //count number of points picked pickpos = pointpicker->GetPickPosition(); cout<<"Point location:"<<pickpos<<" "<<pickpos<<" "<<pickpos<<"\n"; //Define method for placing spheres points=vtkPoints::New(); points->InsertNextPoint(pickpos); points->Modified(); vtkPolyData *profile=vtkPolyData::New(); profile->SetPoints(points); vtkSphereSource *sphere=vtkSphereSource::New(); sphere->SetRadius(0.02); vtkGlyph3D *glyph=vtkGlyph3D::New(); glyph->SetInput(profile); glyph->SetSource(sphere->GetOutput()); vtkPolyDataMapper *glyphMapper=vtkPolyDataMapper::New(); glyphMapper->SetInput(glyph->GetOutput()); vtkActor *glyphActor=vtkActor::New(); glyphActor->SetMapper(glyphMapper); glyphActor->GetProperty()->SetColor(1, 0, 0); //Set colour to red ren1-> AddActor(glyphActor); renWin->Render(); // points-> Delete(); profile->Delete(); sphere->Delete(); glyph->Delete(); glyphMapper->Delete(); glyphActor->Delete(); } else if( pointpicker->GetPointId() < 0 ) { cout<<"No point picked here!"<<"\n"; n=n+1; cout<<"n" <<n<<"\n"; if (n >=3) { cout<<"Selection completed!"<<"\n"; // check the picked points, stored in vtkPoints for (i=0; i<p; i++) { pc = points->GetPoint(i); cout<<"point:"<<pc<<" "<<pc<<" "<<pc<<"\n";//See components points } vtkSelectPolyData *loop = vtkSelectPolyData::New(); // loop->SetInput(reader->GetOutput()); loop->SetInput(PolyData); loop->SetLoop(points); loop->GenerateSelectionScalarsOn(); loop->SetSelectionModeToSmallestRegion(); //negative scalars inside vtkClipPolyData *clip = vtkClipPolyData::New(); //clips out positive region clip->SetInput(loop->GetOutput()); vtkPolyDataMapper *clipMapper = vtkPolyDataMapper::New(); clipMapper->SetInput(clip->GetOutput()); vtkActor *clipActor = vtkActor::New(); clipActor->SetMapper(clipMapper); clipActor->AddPosition(1, 0, 0); clipActor->GetProperty()->SetColor(0, 0, 1); //Set colour blue ren1->AddActor(clipActor); renWin->Render(); points-> Delete(); loop->Delete(); clip->Delete(); clipMapper->Delete(); clipActor->Delete(); } } }看看！！！！！谢谢楼主！！！ 大哥谢了 先学习一下，以留备用 好贴，不要沉了 先看看在说 学习学习！ 次贴无用,检定完毕!
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