Go back to Richel Bilderbeek's homepage.

Go back to Richel Bilderbeek's C++ page.

 

 

 

 

 

(C++) BoostGeometryExample14

 

BoostQt CreatorLubuntu

 

Boost.Geometry example 14: Convert points to a linestring and back is a Boost.Geometry example.

Technical facts

 

Application type(s)

Operating system(s) or programming environment(s)

IDE(s):

Project type:

C++ standard:

Compiler(s):

Libraries used:

 

 

 

 

 

Qt project file: ./CppBoostGeometryExample14/CppBoostGeometryExample14.pro

 

exists(../../ConsoleApplication.pri) {
  include(../../ConsoleApplication.pri)
}
!exists(../../ConsoleApplication.pri) {
  QT += core
  QT += gui
  greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
  CONFIG   += console
  CONFIG   -= app_bundle
  TEMPLATE = app
  CONFIG(release, debug|release) {
    DEFINES += NDEBUG NTRACE_BILDERBIKKEL
  }
  QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++
  unix {
    QMAKE_CXXFLAGS += -Werror
  }
}

exists(../../Libraries/Boost.pri) {
  include(../../Libraries/Boost.pri)
}
!exists(../../Libraries/Boost.pri) {
  win32 {
    INCLUDEPATH += \
      ../../Libraries/boost_1_55_0
  }
}

SOURCES += main.cpp

 

 

 

 

 

./CppBoostGeometryExample14/main.cpp

 

#include <cassert>
#include <iostream>
#include <vector>

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#pragma GCC diagnostic ignored "-Wunused-variable"
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/geometries/linestring.hpp>
#pragma GCC diagnostic pop

int main()
{
  typedef boost::geometry::model::d2::point_xy<double> Point;
  typedef boost::geometry::model::linestring<Point> Linestring;

  //Obtain the points
  const std::vector<Point> points {
    {1.2,3.4},
    {2.3,4.5},
    {3.4,5.6},
    {4.5,6.7}
  };

  //Create a linestring from these points
  Linestring linestring;
  boost::geometry::append(linestring, points);
  assert(boost::geometry::num_points(linestring) == 4);

  //Create the points back again from that linestring
  const std::vector<Point> points_again = linestring;

  //Initial and re-created points must be equal
  assert(
    std::equal(points.begin(),points.end(),points_again.begin(),
      [](const boost::geometry::model::d2::point_xy<double>& a, const boost::geometry::model::d2::point_xy<double>& b)
      {
        return boost::geometry::equals(a,b);
      }
    )
  );
}

 

 

 

 

 

Go back to Richel Bilderbeek's C++ page.

Go back to Richel Bilderbeek's homepage.

 

Valid XHTML 1.0 Strict

This page has been created by the tool CodeToHtml