DataBounds

VTKExamples/Cxx/PolyData/DataBounds

Description

This examples gets the bounds of a dataset. Note that Update() must be applied to create the output of the filter.

Code

DataBounds.cxx

#include <vtkSphereSource.h>
#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
#include <vtkXMLPolyDataReader.h>

int main(int argc, char *argv[])
{
  vtkSmartPointer<vtkPolyData> polyData =
    vtkSmartPointer<vtkPolyData>::New();

  if (argc > 1)
  {
    vtkSmartPointer<vtkXMLPolyDataReader> reader =
      vtkSmartPointer<vtkXMLPolyDataReader>::New();
    reader->SetFileName ( argv[1] );
    reader->Update();
    polyData = reader->GetOutput();
  }
  else
  {
    vtkSmartPointer<vtkSphereSource> modelSource =
      vtkSmartPointer<vtkSphereSource>::New();
    modelSource->Update();
    polyData = modelSource->GetOutput();
  }

  double bounds[6];
  polyData->GetBounds(bounds);

  std::cout  << "xmin: " << bounds[0] << " "
             << "xmax: " << bounds[1] << std::endl
             << "ymin: " << bounds[2] << " "
             << "ymax: " << bounds[3] << std::endl
             << "zmin: " << bounds[4] << " "
             << "zmax: " << bounds[5] << std::endl;

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(DataBounds)

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

add_executable(DataBounds MACOSX_BUNDLE DataBounds.cxx )

target_link_libraries(DataBounds ${VTK_LIBRARIES})

Download and Build DataBounds

Click here to download DataBounds and its CMakeLists.txt file. Once the tarball DataBounds.tar has been downloaded and extracted,

cd DataBounds/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:

./DataBounds

WINDOWS USERS

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