VTK例子14-point picker(拾取多个点)

medimage

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[0]<<" "<<selPt[1]<<"\n";

    if ( pointpicker->GetPointId() >= 0 )

    {

         p = p+1; //count number of points picked

         pickpos = pointpicker->GetPickPosition();

         cout<<"Point location:"<<pickpos[0]<<" "<<pickpos[1]<<" "<<pickpos[2]<<"\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[0]<<" "<<pc[1]<<" "<<pc[2]<<"\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();

       }

    }

}  

medstd

看看！！！！！谢谢楼主！！！

biomed

大哥谢了

medimage

先学习一下，以留备用

dentaldev

好贴，不要沉了

oevko

先看看在说

mdeimage

学习学习！

medphysics

次贴无用,检定完毕!