Method RenderCircleFeatureObject

source/MRViewer/MRRenderFeatureObjects.cpp:209–236

MR_REGISTER_RENDER_OBJECT_IMPL( CircleObject, RenderCircleFeatureObject )
RenderCircleFeatureObject::RenderCircleFeatureObject( const VisualObject& object )
    : RenderObjectCombinator( object ), object_( &object )
{
    // Main visualization.
    static const auto polyline = []{
        auto ret = std::make_shared<Polyline3>();
        std::array<Vector3f, numCircleSegments> points;
        for ( int i = 0; i < numCircleSegments; ++i )
        {
            float angle = i * 2 * PI_F / numCircleSegments;
            points[i].x = cosf( angle );
            points[i].y = sinf( angle );
        }
        ret->addFromPoints( points.data(), numCircleSegments, true );
        return ret;
    }();
    getLines().setPolyline( polyline );

    // Subfeatures.
    getPoints().setPointCloud( std::make_shared<PointCloud>() );
    addSubfeatures( CircleObject{}, &getLines(), &getPoints() );

    // More or less an arbitrary direction. Just something that's not +X to avoid overlaps with other stuff.
    Vector3f nameTagDir = Vector3f( -1, -1, 0 ).normalized();
    nameUiPoint = nameTagDir;
    nameUiPointIsRelativeToBoundingBoxCenter = false;
    nameUiLocalOffset = nameTagDir * 2.f / 3.f;
}

void RenderCircleFeatureObject::renderUi( const UiRenderParams& params )
{