VTK例子4-vtkLineWidget测量距离

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vtkLineWidget测量距离

#include "stdafx.h"

#include "vtkActor.h"

#include "vtkCommand.h"

#include "vtkInteractorEventRecorder.h"

#include "vtkLineWidget.h"

#include "vtkDICOMImageReader.h"

#include "vtkRenderWindowInteractor.h"

#include <vtkImageMapper.h>

#include <vtkImageData.h>

#include <vtkDICOMImageReader.h>

#include <vtkActor2D.h>

#include <vtkRenderer.h>

#include <vtkRenderWindow.h>

#include <vtkImageActor.h>

#include <vtkImageShiftScale.h>

#include <vtkProperty.h>

#include <vtkTextActor.h>

#include <math.h>

#include <string.h>

class vtkLWCallback : public vtkCommand

{

public:

  static vtkLWCallback *New()

    { return new vtkLWCallback; }

  virtual void Execute(vtkObject *caller, unsigned long, void*)

    {

      vtkLineWidget *lineWidget = reinterpret_cast<vtkLineWidget*>(caller);

      this->Actor->VisibilityOn();

      double first[3],second[3];

      lineWidget->GetPoint1 (first);

      lineWidget->GetPoint2 (second);

      lineWidget->SetPoint1 (first[0],first[1],0);

      lineWidget->SetPoint2 (second[0],second[1],0);

      double length;

      length=sqrt((first[0]-second[0])*(first[0]-second[0])+

                   (first[1]-second[1])*(first[1]-second[1]));

      char cAct[100];

      sprintf((char *)cAct,"%.4f mm",length);//将length传给cAct

      this->TextActor->SetInput (cAct);

    }

  vtkLWCallback():Actor(0),TextActor(0) {}

  vtkImageActor *Actor;

  vtkTextActor *TextActor;

};

int main( int argc, char *argv[] )

{

    vtkDICOMImageReader* reader = vtkDICOMImageReader::New();   

      reader->SetFileName("C://DATADIR/brain/brain_008.dcm");

      reader->SetDataByteOrderToLittleEndian();

      reader->Update();

    vtkImageMapper* mapper = vtkImageMapper::New();

      mapper->SetInput(reader->GetOutput());

      mapper->SetColorLevel(127);

      mapper->SetColorWindow(255);

    vtkImageShiftScale *ShiftScale = vtkImageShiftScale::New();

         ShiftScale->SetInput((vtkDataObject *)reader->GetOutput());

         ShiftScale->SetOutputScalarTypeToUnsignedChar();

//       ShiftScale->SetShift (1024);

         ShiftScale->ClampOverflowOn();

         ShiftScale->Update();

    vtkImageActor* actor = vtkImageActor::New();

      actor->SetInput(ShiftScale->GetOutput());

    vtkTextActor *mmm=vtkTextActor::New();

      mmm->SetDisplayPosition(100, 10 );//设定注释位置

      mmm->SetInput("hello!");

  vtkRenderer *ren1 = vtkRenderer::New();

    vtkRenderWindow *renWin = vtkRenderWindow::New();

    renWin->AddRenderer(ren1);

  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();

    iren->SetRenderWindow(renWin);

  vtkLWCallback *myCallback = vtkLWCallback::New();

    myCallback->Actor = actor;

    myCallback->TextActor = mmm;

  vtkLineWidget *lineWidget = vtkLineWidget::New();

    lineWidget->SetInteractor(iren);

    lineWidget->SetInput(reader->GetOutput());

    lineWidget->SetAlignToYAxis();

    lineWidget->PlaceWidget();

    lineWidget->GetLineProperty()->SetColor(1,0,0);

    lineWidget->GetHandleProperty()->SetColor(0,1,0);

    lineWidget->AddObserver(vtkCommand::InteractionEvent,myCallback);

  ren1->AddActor(actor);

  ren1->AddActor(mmm);//显示注释文字

  // Add the actors to the renderer, set the background and size

  //

  ren1->SetBackground(0.1, 0.2, 0.4);

  renWin->SetSize(600, 600);

  ren1->InteractiveOff();

  iren->Initialize();

  renWin->Render();

  iren->SetKeyCode('i');

  iren->InvokeEvent(vtkCommand::CharEvent,NULL);  

  ren1->InteractiveOff();

  // Remove the observers so we can go interactive. Without this the "-I"

  // testing option fails.

  iren->Start();

  myCallback->Delete();

  lineWidget->Delete();

  iren->Delete();

  renWin->Delete();

  ren1->Delete();

  

  return 0;

}

测量距离

江西魏工

学习学习一下

hosstd

好贴！！！