Method pickObjects

source/MRViewer/MRViewportGL.cpp:179–230

}

ViewportGL::PickResults ViewportGL::pickObjects( const PickParameters& params, const std::vector<Vector2i>& picks ) const
{
    if ( !inited_ )
        return {};
    MR_TIMER;

    int width = params.baseRenderParams.viewport.z;
    int height = params.baseRenderParams.viewport.w;
    PickResults results( picks.size() );

    Box2i box;
    for ( const auto& pick : picks )
    {
        if ( pick.x < 0 || pick.x >= width ||
            pick.y < 0 || pick.y >= height )
            continue;
        box.include( pick );
    }

    Vector2i size;
    if ( box.valid() )
        size = box.size() + Vector2i::diagonal( 1 );

    auto resColors = pickObjectsInRect_( params, box );

    // read face and geom
    for ( int i = 0; i < results.size(); ++i )
    {
        auto pick = picks[i];
        if ( pick.x < 0 || pick.x >= width ||
            pick.y < 0 || pick.y >= height )
            continue;
        pick -= box.min;
        auto ind = pick.x + ( size.y - pick.y - 1 ) * size.x;
        const auto& color = resColors[ind].color;

        unsigned primId = color[0];
        unsigned geomId = color[1];
        float z = float(color[3])/float( 0xffffffff );

        results[i] = { {geomId ,primId },z };
    }

    // Filter results
    for ( int i = 0; i < results.size(); ++i )
    {
        if ( results[i].geomId >= params.renderVector.size() || !params.renderVector[results[i].geomId] )
            results[i] = {};
    }

    return results;
}

std::vector<unsigned> ViewportGL::findUniqueObjectsInRect( const PickParameters& params, const Box2i& rect,
                                                           int maxRenderResolutionSide ) const