VTK/Examples/Cxx/PolyData/TransformFilter

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VTK Examples Baseline PolyData TestTransformFilter.png

This example stretches an arrow.

TransformFilter.cxx

#include <vtkSmartPointer.h>

#include <vtkArrowSource.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkTransform.h>
#include <vtkTransformFilter.h>
 
int main(int, char *[])
{
  // Create an arrow.
  vtkSmartPointer<vtkArrowSource> arrowSource = 
    vtkSmartPointer<vtkArrowSource>::New();
 
  vtkSmartPointer<vtkTransform> transform =
    vtkSmartPointer<vtkTransform>::New();
  transform->Scale(5,1,1);
  
  vtkSmartPointer<vtkTransformFilter> transformFilter =
    vtkSmartPointer<vtkTransformFilter>::New();
  transformFilter->SetInputConnection(arrowSource->GetOutputPort());
  transformFilter->SetTransform(transform);
  
  // Visualize
  vtkSmartPointer<vtkPolyDataMapper> mapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(transformFilter->GetOutputPort());
  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
 
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  renderer->AddActor(actor);
  renderer->SetBackground(.2, .3, .4);
 
  renderWindow->Render();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(TransformFilter)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(TransformFilter MACOSX_BUNDLE TransformFilter.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(TransformFilter ${VTK_LIBRARIES})
else()
  target_link_libraries(TransformFilter vtkHybrid vtkWidgets)
endif()

Download and Build TransformFilter

Click here to download TransformFilter. and its CMakeLists.txt file.

Once the tarball TransformFilter.tar has been downloaded and extracted,

cd TransformFilter/build 
  • If VTK is installed:
cmake ..
  • If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./TransformFilter

WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.

Show before and after in side-by-side renderers.