Commit 9e4fe8b4 authored by Maciej Suminski's avatar Maciej Suminski
Browse files

Faster polylines drawing using OpenGL backend. 

Fixed drawing of lines' caps.
parent 4360860b

common/gal/opengl/opengl_gal.cpp

+13 −2
Original line number Diff line number Diff line
@@ -714,7 +714,7 @@ void OPENGL_GAL::DrawLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoin 


    // Line caps

    drawFilledSemiCircle( aStartPoint, lineWidth / 2, lineAngle + M_PI / 2 );

    drawFilledSemiCircle( aEndPoint, lineWidth / 2, lineAngle + M_PI / 2 );

    drawFilledSemiCircle( aEndPoint, lineWidth / 2, lineAngle - M_PI / 2 );

}
@@ -725,8 +725,19 @@ void OPENGL_GAL::DrawPolyline( std::deque<VECTOR2D>& aPointList ) 
    // Start from the second point

    for( it++; it != aPointList.end(); it++ )

    {

        DrawLine( *( it - 1 ), *it );

        const VECTOR2D startEndVector = ( *it - *( it - 1 ) );

        double lineAngle = startEndVector.Angle();



        drawLineQuad( *( it - 1 ), *it );



        // There is no need to draw line caps on both ends of polyline's segments

        drawFilledSemiCircle( *( it - 1 ), lineWidth / 2, lineAngle + M_PI / 2 );

    }



    // ..and now - draw the ending cap

    const VECTOR2D startEndVector = ( *( it - 1 ) - *( it - 2 ) );

    double lineAngle = startEndVector.Angle();

    drawFilledSemiCircle( *( it - 1 ), lineWidth / 2, lineAngle - M_PI / 2 );

}