DistancePointToLine
VTKExamples/Cxx/SimpleOperations/DistancePointToLine
Description
This example computes the distance from a point to a line.
Code
DistancePointToLine.cxx
#include <vtkSmartPointer.h>
#include <vtkLine.h>
#include <vtkPoints.h>
int main(int, char *[])
{
double lineP0[3] = {0.0, 0.0, 0.0};
double lineP1[3] = {2.0, 0.0, 0.0};
double p0[3] = {1.0, 0, 0};
double p1[3] = {1.0, 2.0, 0};
/*
vtkSmartPointer<vtkLine> line =
vtkSmartPointer<vtkLine>::New();
line->GetPoints()->SetPoint(0, lineP0);
line->GetPoints()->SetPoint(0, lineP1);
*/
{
double dist0 = vtkLine::DistanceToLine(p0, lineP0, lineP1);
std::cout << "Dist0: " << dist0 << std::endl;
double dist1 = vtkLine::DistanceToLine(p1, lineP0, lineP1);
std::cout << "Dist1: " << dist1 << std::endl;
}
{
double t;
double closest[3];
double dist0 = vtkLine::DistanceToLine(p0, lineP0, lineP1, t, closest);
std::cout << "Dist0: " << dist0 << " closest point: " << closest[0] << " " << closest[1] << " " << closest[2] << std::endl;
double dist1 = vtkLine::DistanceToLine(p1, lineP0, lineP1, t, closest);
std::cout << "Dist1: " << dist1 << " closest point: " << closest[0] << " " << closest[1] << " " << closest[2] << std::endl;
}
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(DistancePointToLine)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(DistancePointToLine MACOSX_BUNDLE DistancePointToLine.cxx)
target_link_libraries(DistancePointToLine ${VTK_LIBRARIES})
Download and Build DistancePointToLine
Click here to download DistancePointToLine and its CMakeLists.txt file. Once the tarball DistancePointToLine.tar has been downloaded and extracted,
cd DistancePointToLine/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:
./DistancePointToLine
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.