VTK/Examples/Cxx/Filtering/TransformPolyData

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VTK Examples Baseline Filters TestTransformPolyData.png

This example demonstrates how to apply a transform to a data set. vtkTransformPolyDataFilter can be replaced with vtkTransformFilter for different types of data sets, including UnstructuredGrid and StructuredGrid. (vtkTransformFilter will work with PolyData, too).

TransformPolyData.cxx

#include <vtkSmartPointer.h>
#include <vtkTransformPolyDataFilter.h>
#include <vtkSphereSource.h>
#include <vtkPolyData.h>
#include <vtkTransform.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkProperty.h>
 
int main(int, char *[])
{
  vtkSmartPointer<vtkSphereSource> sphereSource =
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();
 
  vtkSmartPointer<vtkTransform> translation =
    vtkSmartPointer<vtkTransform>::New();
  translation->Translate(1.0, 2.0, 3.0);
 
  vtkSmartPointer<vtkTransformPolyDataFilter> transformFilter =
    vtkSmartPointer<vtkTransformPolyDataFilter>::New();
  transformFilter->SetInputConnection(sphereSource->GetOutputPort());
  transformFilter->SetTransform(translation);
  transformFilter->Update();
 
  // Create a mapper and actor
  vtkSmartPointer<vtkPolyDataMapper> originalMapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  originalMapper->SetInputConnection(sphereSource->GetOutputPort());
 
  vtkSmartPointer<vtkActor> originalActor =
    vtkSmartPointer<vtkActor>::New();
  originalActor->SetMapper(originalMapper);
  originalActor->GetProperty()->SetColor(1,0,0);
 
  // Create a mapper and actor
  vtkSmartPointer<vtkPolyDataMapper> transformedMapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  transformedMapper->SetInputConnection(transformFilter->GetOutputPort());
 
  vtkSmartPointer<vtkActor> transformedActor =
    vtkSmartPointer<vtkActor>::New();
  transformedActor->SetMapper(transformedMapper);
  transformedActor->GetProperty()->SetColor(0,1,0);
 
  // Create a renderer, render window, and interactor
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  // Add the actor to the scene
  renderer->AddActor(originalActor);
  renderer->AddActor(transformedActor);
  renderer->SetBackground(.3, .6, .3); // Background color green
 
  // Render and interact
  renderWindow->Render();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
 
PROJECT(TransformPolyData)
 
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
 
if (APPLE)
  add_executable(TransformPolyData MACOSX_BUNDLE TransformPolyData.cxx)
else()
  add_executable(TransformPolyData TransformPolyData.cxx)
endif()
 
if(VTK_LIBRARIES)
  target_link_libraries(TransformPolyData ${VTK_LIBRARIES})
else()
  target_link_libraries(TransformPolyData vtkHybrid )
endif()
Retrieved from "http://batchmake.org/Wiki/VTK/Examples/Cxx/Filtering/TransformPolyData"
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