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This example finds the squared distance and the Euclidean distance between two 3D points.

Click here to download this example.


#include <vtkMath.h>
int main(int, char *[])
  // Create two points.
  double p0[3] = {0.0, 0.0, 0.0};
  double p1[3] = {1.0, 1.0, 1.0};
  // Find the squared distance between the points.
  double squaredDistance = vtkMath::Distance2BetweenPoints(p0, p1);
  // Take the square root to get the Euclidean distance between the points.
  double distance = sqrt(squaredDistance);
  // Output the results.
  std::cout << "SquaredDistance = " << squaredDistance << std::endl;
  std::cout << "Distance = " << distance << std::endl;
  return EXIT_SUCCESS;


cmake_minimum_required(VERSION 2.8)
find_package(VTK REQUIRED)
add_executable(DistanceBetweenPoints MACOSX_BUNDLE DistanceBetweenPoints.cxx)
  target_link_libraries(DistanceBetweenPoints ${VTK_LIBRARIES})
  target_link_libraries(DistanceBetweenPoints vtkHybrid vtkWidgets)

Download and Build DistanceBetweenPoints

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

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

cd DistanceBetweenPoints/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:


and run it:


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.