Hi Joel,


On 20-3-2013 2:54, Joel Markham wrote:
Trying to use the boost geometry library.

Have a very simple example from the boost geometry home page

From which homepage?



int main(int argc, const char * argv[])
{
    double points[][2] = {{2.0, 1.3}, {4.1, 3.0}, {5.3, 2.6}, {2.9, 0.7}, {2.0, 1.3}};
    bgm::polygon<bgm::d2::point_xy<double> > poly;
    bg::append(poly, points);
    boost::tuple<double, double> p = boost::make_tuple(3.7, 2.0);
    std::cout << "Point p is in polygon? " << std::boolalpha << bg::within(p, poly) << std::endl;
    …
}

When trying to build on my Mac I get compiler warnings:

point_type.hpp
No matching function for call to 'assertion_failed"

coordinate_type.hpp
No matching function for call to 'assertion_failed"

convert_point_to_point.hpp
Call to function 'get that is neither visible in the template definition or found…

access.hpp
Nom member named 'get in boost::geometry::core_dispatch…



Your example is not complete (no headers) so I cannot see what is missing here. The complete version below compiles for me. Registration of tuples is necessary (to indicate which coordinate system). Same for C-Arrays, if append is used like this (it can be done differently too).

Regards, Barend
------------------------


#include <boost/geometry.hpp>
#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/geometries/polygon.hpp>
#include <boost/geometry/multi/geometries/multi_polygon.hpp>

#include <boost/geometry/geometries/adapted/boost_tuple.hpp>
#include <boost/geometry/geometries/adapted/c_array.hpp>

#include <iostream>

namespace bg = boost::geometry;
namespace bgm = boost::geometry::model;

BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
BOOST_GEOMETRY_REGISTER_C_ARRAY_CS(cs::cartesian)


int main(int argc, const char * argv[])
{
    double points[][2] = {{2.0, 1.3}, {4.1, 3.0}, {5.3, 2.6}, {2.9, 0.7}, {2.0, 1.3}};
    bgm::polygon<bgm::d2::point_xy<double> > poly;
    bg::append(poly, points);
    boost::tuple<double, double> p = boost::make_tuple(3.7, 2.0);
    std::cout << "Point p is in polygon? " << std::boolalpha << bg::within(p, poly) << std::endl;
    return 0;
}