rtp_v.hpp File Reference

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Functions
template<typename IM >
void	do_vrtp (const std::vector< h2d::Point2d > &vecpts, IM &im)
	Variant-based runtime polymorphism function. More...

Function Documentation

do_vrtp()

template<typename IM >

void do_vrtp	(	const std::vector< h2d::Point2d > &	vecpts,
		IM &	im
	)

Variant-based runtime polymorphism function.

Variant-based polymorphism

ONLY TO BE USED WITH THE ASSOCIATED PROGRAMS homog2d_test_rtp_*.cpp

{
    CPolyline cpol( vecpts );
    OPolyline opol( vecpts );

    std::vector<CommonType> vec;

    vec.push_back( Circle()  );
    vec.push_back( Segment() );
    vec.push_back( FRect()   );
    vec.push_back( Line2d()  );
    vec.push_back( Point2d() );
    vec.push_back( Ellipse() );
    vec.push_back( cpol      );
    vec.push_back( opol      );

    fct::DrawFunct vde( im );
    auto h = Homogr().addTranslation(3,3).addScale(15);
    for( auto& e: vec )
    {
        std::cout << getString(type(e))
            << "\n -area=" << area(e)
            << "\n -size=" << size(e);
        if( type(e) != Type::Line2d )
            std::cout <<  "\n -length=" << length(e);
        else
        {
            Line2d li = fct::VariantUnwrapper{e};
            std::cout << "\n -length=N/A (li=" << li << ')';
        }

        std::cout << "\n- data type=" << getString(dtype(e)) << '\n';

        e = transform( h, e );
        std::visit( vde, e );              // then draw
    }
}

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