Method run

filters/ExpressionFilter.cpp:120–154

PointViewSet ExpressionFilter::run(PointViewPtr inView)
{
    PointViewSet viewSet;
    if (!inView->size())
        return viewSet;

    // make a view for each one of our expressions

    std::vector<PointViewPtr> views;
    for (expr::ConditionalExpression& expr: m_args->m_expressions)
    {
        PointViewPtr outView = inView->makeNew();
        views.push_back(outView);
    }

    // eval our expression across each point for each view.
    // TODO: make this threaded
    for (PointRef point : *inView)
    {
        for (size_t i = 0; i < views.size(); i++)
        {
            auto& view = views[i];
            auto& expr = m_args->m_expressions[i];

            bool status = expr.eval(point);
            if (status)
                view->appendPoint(*inView.get(), point.pointId());
        }
    }

    for(auto& v: views)
        viewSet.insert(v);

    return viewSet;
}

} // namespace pdal