Difference between revisions of "VTK/Examples/Cxx/IO/WriteSTL"

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<div class="floatright">[[File:VTK_Examples_Baseline_IO_TestWriteSTL.png]]</div>
 
<div class="floatright">[[File:VTK_Examples_Baseline_IO_TestWriteSTL.png]]</div>
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An [[wikipedia:STL (file format)|STL file]] describes a triangulated three-dimensional surface by the unit normal and vertices (ordered by the right-hand rule) of the triangles. This example saves a 3D geometric data stored in a {{class|vtkPolyData}} to an STL file using {{class|vtkSTLWriter}}.
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==WriteSTL.cxx==
 
==WriteSTL.cxx==
 
<source lang="cpp">
 
<source lang="cpp">

Latest revision as of 12:06, 18 May 2016

VTK Examples Baseline IO TestWriteSTL.png

An STL file describes a triangulated three-dimensional surface by the unit normal and vertices (ordered by the right-hand rule) of the triangles. This example saves a 3D geometric data stored in a vtkPolyData to an STL file using vtkSTLWriter.

WriteSTL.cxx

#include <vtkPolyData.h>
#include <vtkSTLWriter.h>
#include <vtkSTLReader.h>
#include <vtkSphereSource.h>
#include <vtkSmartPointer.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>

int main(int argc, char *argv[])
{
  if(argc != 2)
    {
    std::cout << "Required parameters: filename.stl" << std::endl;
    return EXIT_FAILURE;
    }

  std::string filename = argv[1];

  vtkSmartPointer<vtkSphereSource> sphereSource =
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();

  vtkSmartPointer<vtkSTLWriter> stlWriter =
    vtkSmartPointer<vtkSTLWriter>::New();
  stlWriter->SetFileName(filename.c_str());
  stlWriter->SetInputConnection(sphereSource->GetOutputPort());
  stlWriter->Write();

  // Read and display for verification
  vtkSmartPointer<vtkSTLReader> reader =
    vtkSmartPointer<vtkSTLReader>::New();
  reader->SetFileName(filename.c_str());
  reader->Update();
  
  vtkSmartPointer<vtkPolyDataMapper> mapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(sphereSource->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(.3, .6, .3); // Background color green

  renderWindow->Render();
  renderWindowInteractor->Start();
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(WriteSTL)

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

add_executable(WriteSTL MACOSX_BUNDLE WriteSTL.cxx)

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

Download and Build WriteSTL

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

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

cd WriteSTL/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:

./WriteSTL

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.