Method step

plugins/animate/fire/fire.cpp:256–271

}

bool FireAnimation::step()
{
    auto transformer = view->get_transformed_node()
        ->get_transformer<fire_node_t>(name);

    transformer->set_progress_line(this->progression);
    if (this->progression.running())
    {
        transformer->ps->spawn(transformer->ps->size() / 10);
    }

    transformer->ps->update();
    transformer->ps->resize(particle_count_for_width(
        transformer->get_children_bounding_box().width));
    return this->progression.running() || transformer->ps->statistic();
}

void FireAnimation::reverse()
{