Re: [Boost-users] [Geometry] warnings

12 May 2015

      Hi,

Pb wrote:
...
Hello,
Using Boost 1.58 on VC9 (MSVC++ 2008) compiling a small program 
generates warnings in the Geometry headers in Release and Debug modes. 
Please let me know if this is a Boost.Geometry issue or something I'm 
not doing correctly.
It's a known Boost.Geometry issue. Internally the coordinates at some 
point can be rescaled to int64 in some cases and then to the floating 
point type which trigers the warning.
Thanks for reminding about the issue!
...
The program source
=================
#include 
#include 
#include 
#include 
typedef boost::geometry::model::d2::point_xy<double> point;
typedef boost::geometry::model::polygon polygon;
typedef boost::geometry::model::linestring<point> polyline;
int main()
{
polygon green, blue;
green.outer().push_back(point(-1.0, 1.0));
green.outer().push_back(point(1.0, 1.0));
green.outer().push_back(point(1.0, -1.0));
green.outer().push_back(point(-1.0, -1.0));
blue.outer().push_back(point(0.5, 0.5));
blue.outer().push_back(point(0.5, 1.5));
blue.outer().push_back(point(1.5, 1.5));
blue.outer().push_back(point(1.5, 0.5));
std::vector<polygon> output;
boost::geometry::intersection(blue, green, output);
}
I see one problem though.
Your polygon is defined as Counter-Clockwise and Closed
see 
http://www.boost.org/doc/libs/1_58_0/libs/geometry/doc/html/geometry/referen...
But the data you pushed back into the polygon define a Clockwise 
polygon. Plus Closed polygon should have the first and the last point equal.
So you should either pass the correct template parameters into the 
model::polygon, create the polygons differently or call bg::correct() 
afterwards.

Regards,
Adam
...
Warning summary
==============
Warning1warning C4244: 'initializing' : conversion from 'const 
coordinate_type' to 'const promoted_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp96
Warning2warning C4244: 'initializing' : conversion from 'const 
coordinate_type' to 'const promoted_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp97
Warning3warning C4244: 'initializing' : conversion from 'const 
coordinate_type' to 'const promoted_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp98
Warning4warning C4244: 'initializing' : conversion from 'const 
coordinate_type' to 'const promoted_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp99
Warning5warning C4244: 'argument' : conversion from '__int64' to 
'const double', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\algorithms\detail\recalculate.hpp51
Warning6warning C4244: 'argument' : conversion from '__int64' to 
'const double', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\algorithms\detail\recalculate.hpp51
Warning7warning C4244: 'initializing' : conversion from '__int64' to 
'const coordinate_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp88
Warning8warning C4244: 'initializing' : conversion from '__int64' to 
'const coordinate_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp89
Warning9warning C4244: 'initializing' : conversion from '__int64' to 
'const coordinate_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp91
Warning10warning C4244: 'initializing' : conversion from '__int64' to 
'const coordinate_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp92
Warning11warning C4244: 'initializing' : conversion from '__int64' to 
'const coordinate_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp93
Warning12warning C4244: 'initializing' : conversion from '__int64' to 
'const coordinate_type', possible loss of 
datac:\releases\lib\boost\boost_1_58_0\include\boost\geometry\strategies\cartesian\side_by_triangle.hpp94
Warnings in more detail
===============
1>------ Build started: Project: boost_geom_warnings, Configuration: 
Release Win32 ------
1>Compiling...
1>main.cpp
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(96) 
: warning C4244: 'initializing' : conversion from 'const 
coordinate_type' to 'const promoted_type', possible loss of data
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(138) 
: see reference to function template instantiation 'PromotedType 
boost::geometry::strategy::side::side_by_triangle<>::side_value(const 
P1 &,const P2 &,const P &,EpsPolicy &)' being compiled
1>        with
1>        [
1>            PromotedType=promoted_type,
1>            CoordinateType=coordinate_type,
1>            P1=robust_point_type,
1>            P2=robust_point_type,
1>            P=robust_point_type,
1> 
 EpsPolicy=boost::geometry::strategy::side::side_by_triangle<>::eps_policy>
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(234) 
: see reference to function template instantiation 'PromotedType 
boost::geometry::strategy::side::side_by_triangle<>::compute_side_value::apply::eps_policy<Policy>>(const 
P1 &,const P2 &,const P &,EpsPolicy &)' being compiled
1>        with
1>        [
1>            PromotedType=promoted_type,
1>            CoordinateType=coordinate_type,
1>            AreAllIntegralCoordinates=true,
1>            P1=robust_point_type,
1>            P2=robust_point_type,
1>            P=robust_point_type,
1> 
 Policy=boost::geometry::math::detail::equals_factor_policy,
1> 
 EpsPolicy=boost::geometry::strategy::side::side_by_triangle<>::eps_policy>
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/point_is_spike_or_equal.hpp(51) 
: see reference to function template instantiation 'int 
boost::geometry::strategy::side::side_by_triangle<>::apply(const 
P1 &,const P2 &,const P &)' being compiled
1>        with
1>        [
1>            Point1=robust_point_type,
1>            Point2=robust_point_type,
1>            Point3=robust_point_type,
1>            P1=robust_point_type,
1>            P2=robust_point_type,
1>            P=robust_point_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/point_is_spike_or_equal.hpp(117) 
: see reference to function template instantiation 'bool 
boost::geometry::detail::point_is_spike_or_equal(const 
Point1 &,const Point2 &,const Point3 &)' being compiled
1>        with
1>        [
1>            Point1=robust_point_type,
1>            Point2=robust_point_type,
1>            Point3=robust_point_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/append_no_dups_or_spikes.hpp(95) 
: see reference to function template instantiation 'bool 
boost::geometry::detail::point_is_spike_or_equal(const 
Point1 &,const Point2 &,const Point3 &,const RobustPolicy &)' being 
compiled
1>        with
1>        [
1>            Point=point_type,
1>            CoordinateType=double,
1>            RobustPolicy=rescale_policy_type,
1>            Point1=point_type,
1>  Point2=boost::geometry::model::d2::point_xy<double>,
1>  Point3=boost::geometry::model::d2::point_xy<double>
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/traverse.hpp(289) 
: see reference to function template instantiation 'void 
boost::geometry::detail::overlay::append_no_dups_or_spikes(Range 
&,const Point &,const RobustPolicy &)' being compiled
1>        with
1>        [
1>            Point=point_type,
1>            RobustPolicy=rescale_policy_type,
1>            Range=ring_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/overlay.hpp(232) 
: see reference to function template instantiation 'void 
boost::geometry::detail::overlay::traverse::apply(const 
Geometry1 &,const Geometry2 
&,boost::geometry::detail::overlay::operation_type,const RobustPolicy 
&,Turns &,Rings &)' being compiled
1>        with
1>        [
1>            Reverse1=true,
1>            Reverse2=true,
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            RobustPolicy=rescale_policy_type,
1>            Turns=container_type,
1>            Rings=ring_container_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/intersection/interface.hpp(57) 
: see reference to function template instantiation 'OutputIterator 
boost::geometry::detail::overlay::overlay::apply,Strategy>(const 
Geometry1 &,const Geometry2 &,const RobustPolicy 
&,OutputIterator,const Strategy &)' being compiled
1>        with
1>        [
1>  OutputIterator=std::back_insert_iterator,
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            Reverse1=true,
1>            Reverse2=true,
1>            ReverseOut=true,
1>            GeometryOut=OneOut,
1>            Direction=overlay_intersection,
1>            RobustPolicy=rescale_policy_type,
1>            _Container=std::vector<polygon>,
1> 
 Strategy=boost::geometry::strategy_intersection
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/intersection/interface.hpp(138) 
: see reference to function template instantiation 'bool 
boost::geometry::dispatch::intersection::apply>(const 
Geometry1 &,const Geometry2 &,const RobustPolicy &,GeometryOut &,const 
Strategy &)' being compiled
1>        with
1>        [
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            GeometryOut=std::vector<polygon>,
1>            Tag=boost::geometry::cartesian_tag,
1>  IntersectionPoint=boost::geometry::model::d2::point_xy<double>,
1>            RobustPolicy=rescale_policy_type,
1> 
 Strategy=boost::geometry::strategy_intersection
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/intersection/interface.hpp(302) 
: see reference to function template instantiation 'bool 
boost::geometry::resolve_variant::intersection::apply<GeometryOut>(const 
Geometry1 &,const Geometry2 &,GeometryOut &)' being compiled
1>        with
1>        [
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            GeometryOut=std::vector<polygon>
1>        ]
1>        .\main.cpp(24) : see reference to function template 
instantiation 'bool 
boost::geometry::intersection>(const 
Geometry1 &,const Geometry2 &,GeometryOut &)' being compiled
1>        with
1>        [
1>            _Ty=polygon,
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            GeometryOut=std::vector<polygon>
1>        ]
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(97) 
: warning C4244: 'initializing' : conversion from 'const 
coordinate_type' to 'const promoted_type', possible loss of data
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(98) 
: warning C4244: 'initializing' : conversion from 'const 
coordinate_type' to 'const promoted_type', possible loss of data
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(99) 
: warning C4244: 'initializing' : conversion from 'const 
coordinate_type' to 'const promoted_type', possible loss of data
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/recalculate.hpp(51) 
: warning C4244: 'argument' : conversion from '__int64' to 'const 
double', possible loss of data
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/recalculate.hpp(224) 
: see reference to function template instantiation 'void 
boost::geometry::detail::recalculate::recalculate_point<Dimension>::apply(Point1 
&,const Point2 &,const Strategy &)' being compiled
1>        with
1>        [
1>            Dimension=2,
1>  Geometry1=boost::geometry::model::d2::point_xy<double>,
1>  Geometry2=boost::geometry::model::d2::point_xy<double>,
1>            Strategy=rescale_policy_type,
1>  Point1=boost::geometry::model::d2::point_xy<double>,
1>  Point2=boost::geometry::model::d2::point_xy<double>
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/handle_tangencies.hpp(109) 
: see reference to function template instantiation 'void 
boost::geometry::recalculate(Geometry1 &,const Geometry2 &,const Strategy &)' being 
compiled
1>        with
1>        [
1>            CoordinateType=double,
1>            RobustPolicy=rescale_policy_type,
1>  Geometry1=boost::geometry::model::d2::point_xy<double>,
1>  Geometry2=boost::geometry::model::d2::point_xy<double>,
1>            Strategy=rescale_policy_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/handle_tangencies.hpp(96) 
: while compiling class template member function 'void 
boost::geometry::detail::overlay::sort_in_cluster::get_situation_map(const 
Indexed &,const Indexed 
&,boost::geometry::model::d2::point_xy<CoordinateType> 
&,boost::geometry::model::d2::point_xy<CoordinateType> 
&,boost::geometry::model::d2::point_xy<CoordinateType> 
&,boost::geometry::model::d2::point_xy<CoordinateType> 
&,boost::geometry::model::d2::point_xy<CoordinateType> 
&,boost::geometry::model::d2::point_xy<CoordinateType> &) const'
1>        with
1>        [
1>            TurnPoints=container_type,
1>            Indexed=indexed_turn_operation,
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            RobustPolicy=const rescale_policy_type,
1>            Reverse1=true,
1>            Reverse2=true,
1>  Strategy=boost::geometry::strategy::side::side_by_triangle<>,
1>            CoordinateType=double
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/handle_tangencies.hpp(742) 
: see reference to class template instantiation 
'boost::geometry::detail::overlay::sort_in_cluster' 
being compiled
1>        with
1>        [
1>            TurnPoints=container_type,
1>            Indexed=indexed_turn_operation,
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            RobustPolicy=const rescale_policy_type,
1>            Reverse1=true,
1>            Reverse2=true,
1>  Strategy=boost::geometry::strategy::side::side_by_triangle<>
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/enrich_intersection_points.hpp(290) 
: see reference to function template instantiation 'void 
boost::geometry::detail::overlay::handle_cluster(Iterator,Iterator,TurnPoints 
&,boost::geometry::detail::overlay::operation_type,const Geometry1 
&,const Geometry2 &,RobustPolicy &,const Strategy &)' being compiled
1>        with
1>        [
1>            IndexType=indexed_turn_operation,
1>            TurnPoints=container_type,
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            RobustPolicy=rescale_policy_type,
1>  Strategy=boost::geometry::strategy::side::side_by_triangle<>,
1>            Iterator=nc_iterator
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/enrich_intersection_points.hpp(533) 
: see reference to function template instantiation 'void 
boost::geometry::detail::overlay::enrich_sort(Container 
&,TurnPoints &,boost::geometry::detail::overlay::operation_type,const 
Geometry1 &,const Geometry2 &,const RobustPolicy &,const Strategy &)' 
being compiled
1>        with
1>        [
1>  _Ty2=std::vector,
1>            TurnPoints=container_type,
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            RobustPolicy=rescale_policy_type,
1>  Strategy=boost::geometry::strategy::side::side_by_triangle<>,
1>  Container=std::vector
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/overlay.hpp(215) 
: see reference to function template instantiation 'void 
boost::geometry::enrich_intersection_points>(TurnPoints 
&,boost::geometry::detail::overlay::operation_type,const Geometry1 
&,const Geometry2 &,const RobustPolicy &,const Strategy &)' being compiled
1>        with
1>        [
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            RobustPolicy=rescale_policy_type,
1>            TurnPoints=container_type,
1>  Strategy=boost::geometry::strategy::side::side_by_triangle<>
1>        ]
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/recalculate.hpp(51) 
: warning C4244: 'argument' : conversion from '__int64' to 'const 
double', possible loss of data
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/recalculate.hpp(52) 
: see reference to function template instantiation 'void 
boost::geometry::detail::recalculate::recalculate_point<Dimension>::apply(Point1 
&,const Point2 &,const Strategy &)' being compiled
1>        with
1>        [
1>            Dimension=1,
1>  Point1=boost::geometry::model::d2::point_xy<double>,
1>  Point2=boost::geometry::model::d2::point_xy<double>,
1>            Strategy=rescale_policy_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/recalculate.hpp(224) 
: see reference to function template instantiation 'void 
boost::geometry::detail::recalculate::recalculate_point<Dimension>::apply(Point1 
&,const Point2 &,const Strategy &)' being compiled
1>        with
1>        [
1>            Dimension=2,
1>  Geometry1=boost::geometry::model::d2::point_xy<double>,
1>  Geometry2=boost::geometry::model::d2::point_xy<double>,
1>            Strategy=rescale_policy_type,
1>  Point1=boost::geometry::model::d2::point_xy<double>,
1>  Point2=boost::geometry::model::d2::point_xy<double>
1>        ]
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(88) 
: warning C4244: 'initializing' : conversion from '__int64' to 'const 
coordinate_type', possible loss of data
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(138) 
: see reference to function template instantiation 'PromotedType 
boost::geometry::strategy::side::side_by_triangle<CalculationType>::side_value(const 
P1 &,const P2 &,const P &,EpsPolicy &)' being compiled
1>        with
1>        [
1>            PromotedType=promoted_type,
1>            CalculationType=coordinate_type,
1>            CoordinateType=coordinate_type,
1>            P1=robust_point_type,
1>            P2=robust_point_type,
1>            P=robust_point_type,
1> 
 EpsPolicy=boost::geometry::strategy::side::side_by_triangle::eps_policy>
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(234) 
: see reference to function template instantiation 'PromotedType 
boost::geometry::strategy::side::side_by_triangle<CalculationType>::compute_side_value::apply(const 
P1 &,const P2 &,const P &,EpsPolicy &)' being compiled
1>        with
1>        [
1>            PromotedType=promoted_type,
1>            CalculationType=coordinate_type,
1>            CoordinateType=coordinate_type,
1>            AreAllIntegralCoordinates=true,
1>            P1=robust_point_type,
1>            P2=robust_point_type,
1>            P=robust_point_type,
1> 
 Policy=boost::geometry::math::detail::equals_factor_policy,
1> 
 EpsPolicy=boost::geometry::strategy::side::side_by_triangle::eps_policy>
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/cart_intersect.hpp(140) 
: see reference to function template instantiation 'int 
boost::geometry::strategy::side::side_by_triangle<CalculationType>::apply(const 
P1 &,const P2 &,const P &)' being compiled
1>        with
1>        [
1>            CalculationType=coordinate_type,
1>            RobustPoint=robust_point_type,
1>            P1=robust_point_type,
1>            P2=robust_point_type,
1>            P=robust_point_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/cart_intersect.hpp(107) 
: see reference to function template instantiation 
'boost::tuples::tuple 
boost::geometry::strategy::intersection::relate_cartesian_segments::apply(const 
Segment1 &,const Segment2 &,const RobustPolicy &,const RobustPoint 
&,const RobustPoint &,const RobustPoint &,const RobustPoint &)' being 
compiled
1>        with
1>        [
1> 
 T0=boost::geometry::segment_intersection_points::type>,
1>  T1=boost::geometry::policies::relate::segments_direction::return_type,
1> 
 Policy=boost::geometry::policies::relate::segments_tupled::type>>,boost::geometry::policies::relate::segments_direction>,
1>            CalculationType=void,
1>  Segment1=boost::geometry::model::referring_segment,
1>  Segment2=boost::geometry::model::referring_segment,
1>            RobustPolicy=rescale_policy_type,
1>            RobustPoint=robust_point_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/get_turn_info_helpers.hpp(220) 
: see reference to function template instantiation 
'boost::tuples::tuple 
boost::geometry::strategy::intersection::relate_cartesian_segments::apply(const 
Segment1 &,const Segment2 &,const RobustPolicy &)' being compiled
1>        with
1>        [
1> 
 T0=boost::geometry::segment_intersection_points::type>,
1>  T1=boost::geometry::policies::relate::segments_direction::return_type,
1> 
 Policy=boost::geometry::policies::relate::segments_tupled::type>>,boost::geometry::policies::relate::segments_direction>,
1>            CalculationType=void,
1>            ConstOrNonConstPoint=const 
boost::geometry::model::d2::point_xy<double>,
1>            RobustPolicy=rescale_policy_type,
1>  Segment1=boost::geometry::model::referring_segment,
1>  Segment2=boost::geometry::model::referring_segment
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/get_turn_info_helpers.hpp(214) 
: while compiling class template member function 
'boost::geometry::detail::overlay::intersection_info::intersection_info(const 
Point1 &,const Point1 &,const Point1 &,const Point2 &,const Point2 
&,const Point2 &,const RobustPolicy &)'
1>        with
1>        [
1>  Point1=boost::geometry::model::d2::point_xy<double>,
1>  Point2=boost::geometry::model::d2::point_xy<double>,
1>  TurnPoint=boost::geometry::model::d2::point_xy<double>,
1>            RobustPolicy=rescale_policy_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/get_turn_info.hpp(926) 
: see reference to class template instantiation 
'boost::geometry::detail::overlay::intersection_info' 
being compiled
1>        with
1>        [
1>  Point1=boost::geometry::model::d2::point_xy<double>,
1>  Point2=boost::geometry::model::d2::point_xy<double>,
1>  TurnPoint=boost::geometry::model::d2::point_xy<double>,
1>            RobustPolicy=rescale_policy_type
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/get_turns.hpp(297) 
: see reference to function template instantiation 'OutputIterator 
boost::geometry::detail::overlay::get_turn_info<AssignPolicy>::apply>(const 
Point1 &,const Point1 &,const Point1 &,const Point2 &,const Point2 
&,const Point2 &,bool,bool,bool,bool,const TurnInfo &,const 
RobustPolicy &,OutputIterator)' being compiled
1>        with
1>        [
1>  OutputIterator=std::back_insert_iterator,
1>  AssignPolicy=boost::geometry::detail::overlay::assign_null_policy,
1>            CoordinateType=double,
1>            RobustPolicy=rescale_policy_type,
1>            _Container=container_type,
1>  Point1=boost::geometry::model::d2::point_xy<double>,
1>  Point2=boost::geometry::model::d2::point_xy<double>,
1>            TurnInfo=turn_info
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/get_turns.hpp(426) 
: see reference to function template instantiation 'bool 
boost::geometry::detail::get_turns::get_turns_in_sections::apply(int,const 
Geometry1 &,const Section1 &,int,const Geometry2 &,const Section2 
&,bool,const RobustPolicy &,Turns &,InterruptPolicy &)' being compiled
1>        with
1>        [
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            Reverse1=true,
1>            Reverse2=true,
1>  Section1=boost::geometry::section,
1>  Section2=boost::geometry::section,
1>            TurnPolicy=TurnPolicy,
1>            Turns=container_type,
1>            RobustPolicy=rescale_policy_type,
1> 
 InterruptPolicy=boost::geometry::detail::get_turns::no_interrupt_policy
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/partition.hpp(641) 
: see reference to function template instantiation 'bool 
boost::geometry::detail::get_turns::section_visitor::apply>(const 
Section &,const Section &)' being compiled
1>        with
1>        [
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            Reverse1=true,
1>            Reverse2=true,
1>            Turns=container_type,
1>            TurnPolicy=TurnPolicy,
1>            RobustPolicy=rescale_policy_type,
1> 
 InterruptPolicy=boost::geometry::detail::get_turns::no_interrupt_policy,
1>            Box=box_type,
1>            DimensionCount=2,
1>  Section=boost::geometry::section
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/get_turns.hpp(485) 
: see reference to function template instantiation 'void 
boost::geometry::partition::apply>(const 
InputCollection1 &,const InputCollection2 &,VisitPolicy 
&,size_t,VisitBoxPolicy)' being compiled
1>        with
1>        [
1>            Box=box_type,
1>  ExpandPolicy1=boost::geometry::detail::section::get_section_box,
1> 
 OverlapsPolicy1=boost::geometry::detail::section::overlaps_section_box,
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            Reverse1=true,
1>            Reverse2=true,
1>            Turns=container_type,
1>            TurnPolicy=TurnPolicy,
1>            RobustPolicy=rescale_policy_type,
1> 
 InterruptPolicy=boost::geometry::detail::get_turns::no_interrupt_policy,
1>            InputCollection1=sections_type,
1>            InputCollection2=sections_type,
1> 
 VisitPolicy=boost::geometry::detail::get_turns::section_visitor,
1>  VisitBoxPolicy=boost::geometry::detail::partition::visit_no_policy
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/get_turns.hpp(1002) 
: see reference to function template instantiation 'void 
boost::geometry::detail::get_turns::get_turns_generic::apply(int,const 
Geometry1 &,int,const Geometry2 &,const RobustPolicy &,Turns 
&,InterruptPolicy &)' being compiled
1>        with
1>        [
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            Reverse1=true,
1>            Reverse2=true,
1>            TurnPolicy=TurnPolicy,
1>            RobustPolicy=rescale_policy_type,
1>            Turns=container_type,
1> 
 InterruptPolicy=boost::geometry::detail::get_turns::no_interrupt_policy
1>        ]
1> 
 c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/algorithms/detail/overlay/overlay.hpp(203) 
: see reference to function template instantiation 'void 
boost::geometry::get_turns(const 
Geometry1 &,const Geometry2 &,const RobustPolicy &,Turns 
&,InterruptPolicy &)' being compiled
1>        with
1>        [
1>            Geometry1=polygon,
1>            Geometry2=polygon,
1>            RobustPolicy=rescale_policy_type,
1>            Turns=container_type,
1> 
 InterruptPolicy=boost::geometry::detail::get_turns::no_interrupt_policy
1>        ]
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(89) 
: warning C4244: 'initializing' : conversion from '__int64' to 'const 
coordinate_type', possible loss of data
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(91) 
: warning C4244: 'initializing' : conversion from '__int64' to 'const 
coordinate_type', possible loss of data
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(92) 
: warning C4244: 'initializing' : conversion from '__int64' to 'const 
coordinate_type', possible loss of data
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(93) 
: warning C4244: 'initializing' : conversion from '__int64' to 'const 
coordinate_type', possible loss of data
1>c:\releases\lib\boost\boost_1_58_0\include\boost/geometry/strategies/cartesian/side_by_triangle.hpp(94) 
: warning C4244: 'initializing' : conversion from '__int64' to 'const 
coordinate_type', possible loss of data
1>Build log was saved at 
"file://c:\cpp\boost_geom_warnings\Release\BuildLog.htm"
1>boost_geom_warnings - 0 error(s), 12 warning(s)
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped 
==========
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Re: [Boost-users] [Geometry] warnings

Adam Wulkiewicz