# DistanceBetweenPoints

vtk-examples/Cxx/SimpleOperations/DistanceBetweenPoints

### Description¶

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

Other languages

See (Python), (Java), (CSharp)

Question

### Code¶

DistanceBetweenPoints.cxx

#include <vtkMath.h>

int main(int, char*[])
{
// Create two points.
double p0 = {0.0, 0.0, 0.0};
double p1 = {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 = std::sqrt(squaredDistance);

// Output the results.
std::cout << "SquaredDistance = " << squaredDistance << std::endl;
std::cout << "Distance = " << distance << std::endl;

return EXIT_SUCCESS;
}


### CMakeLists.txt¶

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(DistanceBetweenPoints)

find_package(VTK COMPONENTS
CommonCore
)

if (NOT VTK_FOUND)
message(FATAL_ERROR "DistanceBetweenPoints: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
target_link_libraries(DistanceBetweenPoints PRIVATE ${VTK_LIBRARIES} ) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS DistanceBetweenPoints MODULES${VTK_LIBRARIES}
)


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

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