# DistanceBetweenPoints

VTKExamples/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 = 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 3.3 FATAL_ERROR)

project(DistanceBetweenPoints)

find_package(VTK COMPONENTS
vtkCommonCore QUIET)
if (NOT VTK_FOUND)
message("Skipping DistanceBetweenPoints: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION:${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
# old system
include(${VTK_USE_FILE}) add_executable(DistanceBetweenPoints MACOSX_BUNDLE DistanceBetweenPoints.cxx ) target_link_libraries(DistanceBetweenPoints PRIVATE${VTK_LIBRARIES})
else ()
# include all components
target_link_libraries(DistanceBetweenPoints PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS DistanceBetweenPoints MODULES${VTK_LIBRARIES}
)
endif ()


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.