VTK/Examples/Cxx/SimpleOperations/DistanceBetweenPoints

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

DistanceBetweenPoints.cxx

#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;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(DistanceBetweenPoints)

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

add_executable(DistanceBetweenPoints MACOSX_BUNDLE DistanceBetweenPoints.cxx)

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

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:

make

and run it:

./DistanceBetweenPoints

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.