VTK/Examples/Cxx/PolyData/PointLocatorRadius

From KitwarePublic
Jump to navigationJump to search

PointLocatorRadius.cxx

#include <vtkSmartPointer.h>
#include <vtkIdList.h>
#include <vtkPolyDataMapper.h>
#include <vtkObjectFactory.h>
#include <vtkPointSource.h>
#include <vtkPolyData.h>
#include <vtkPointLocator.h>

int main(int, char *[])
{
  vtkSmartPointer<vtkPointSource> pointSource = 
    vtkSmartPointer<vtkPointSource>::New();
  pointSource->SetNumberOfPoints(400);
  pointSource->Update();
  
  // Create the tree
  vtkSmartPointer<vtkPointLocator> pointLocator = 
    vtkSmartPointer<vtkPointLocator>::New();
  pointLocator->SetDataSet(pointSource->GetOutput());
  pointLocator->AutomaticOn();
  pointLocator->SetNumberOfPointsPerBucket(2);
  pointLocator->BuildLocator();
  
  double radius = .1;
  double center[3] = {0.0, 0.0, 0.0};
  vtkSmartPointer<vtkIdList> result = 
    vtkSmartPointer<vtkIdList>::New();
  pointLocator->FindPointsWithinRadius (radius, center, result);
  
  for(vtkIdType i = 0; i < result->GetNumberOfIds(); i++)
    {
    unsigned int id = result->GetId(i);
    std::cout << "id of point " << i << " : " << id << std::endl;
    }
     
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(PointLocatorRadius)

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

add_executable(PointLocatorRadius MACOSX_BUNDLE PointLocatorRadius.cxx)

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

Download and Build PointLocatorRadius

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

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

cd PointLocatorRadius/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:

./PointLocatorRadius

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.

Color query point and points that are found to be neighbors.