VTK/Examples/Cxx/SimpleOperations/DistancePointToLine

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This example computes the distance from a point to a line.

DistancePointToLine.cxx (edit)

#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 << "Dist0: " << 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})
 
if (APPLE)
  add_executable(DistancePointToLine MACOSX_BUNDLE DistancePointToLine.cxx)
else()
  add_executable(DistancePointToLine DistancePointToLine.cxx)
endif()
 
if(VTK_LIBRARIES)
  target_link_libraries(DistancePointToLine ${VTK_LIBRARIES})
else()
  target_link_libraries(DistancePointToLine vtkHybrid )
endif()
Retrieved from "http://www.vtk.org/Wiki/VTK/Examples/Cxx/SimpleOperations/DistancePointToLine"
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