pipe2.cxx

a very goog book

/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: pipe2.cxx,v $
  Language:  C++
  Date:      $Date: 2002/09/30 20:37:43 $
  Version:   $Revision: 1.5 $

  Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "vtkActor.h"
#include "vtkContourFilter.h"
#include "vtkImageData.h"
#include "vtkInputPort.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkRenderWindow.h"
#include "vtkRenderer.h"

#include "PipelineParallelism.h"

// Pipe 2 for PipelineParallelism.
// See PipelineParallelism.cxx for more information.
void pipe2(vtkMultiProcessController* vtkNotUsed(controller), 
           void* vtkNotUsed(arg))
{
  // Input port
  vtkInputPort* ip = vtkInputPort::New();
  ip->SetRemoteProcessId(0);
  ip->SetTag(11);

  // Iso-surface
  vtkContourFilter* cf = vtkContourFilter::New();
  cf->SetInput(ip->GetImageDataOutput());
  cf->SetNumberOfContours(1);
  cf->SetValue(0, 220);

  // Rendering objects
  vtkPolyDataMapper* mapper = vtkPolyDataMapper::New();
  mapper->SetInput(cf->GetOutput());

  vtkActor* actor = vtkActor::New();
  actor->SetMapper(mapper);

  vtkRenderer* ren = vtkRenderer::New();
  ren->AddActor(actor);

  vtkRenderWindow* renWin = vtkRenderWindow::New();
  renWin->AddRenderer(ren);

  // Normally, the Render() call on a RenderWindow() calls
  // update on it's actors two times. This is not appropriate
  // for this example because with each Update(), the data 
  // changes. For this reason, we will use a separate PolyData
  // object and (shallow) copy the data to it.
  vtkPolyData* pd = vtkPolyData::New();
  mapper->SetInput(pd);

  // Prime the pipeline. Tell the producer to start computing.
  ip->Update();

  // Get the first data, adjust camera appropriatly
  cf->GetOutput()->Update();
  pd->ShallowCopy(cf->GetOutput());
  ren->ResetCamera();
  // Display data
  renWin->Render();

  // Get more data. With every update the XFreq of the rtSource
  // is increased.
  for (int i=0; i<17; i++)
    {
    cf->GetOutput()->Update();
    pd->ShallowCopy(cf->GetOutput());
    // Display
    renWin->Render();
    }
  // Tell the producer that we are done.
  ip->GetController()->TriggerRMI(0, vtkMultiProcessController::BREAK_RMI_TAG);

  pd->Delete();
  ip->Delete();
  cf->Delete();
  mapper->Delete();
  actor->Delete();
  ren->Delete();
  renWin->Delete();
  
}