C++ (Cpp) Polygon_2::is_clockwise_oriented примеры использования

Пример #1

Файл: minkowskiSum.cpp Проект: hdeeken/SFCGAL

/*
 * append gA+gB into the polygonSet
 */
void minkowskiSum( const Point& gA, const Polygon_2& gB, Polygon_set_2& polygonSet )
{
    BOOST_ASSERT( gB.size() );

    CGAL::Aff_transformation_2< Kernel > translate(
        CGAL::TRANSLATION,
        gA.toVector_2()
    );

    Polygon_2 sum ;

    for ( Polygon_2::Vertex_const_iterator it = gB.vertices_begin();
            it != gB.vertices_end(); ++it ) {
        sum.push_back( translate.transform( *it ) );
    }

    if ( sum.is_clockwise_oriented() ) {
        sum.reverse_orientation() ;
    }

    if ( polygonSet.is_empty() ) {
        polygonSet.insert( sum );
    }
    else {
        polygonSet.join( sum );
    }
}