Function update_cloud_knowledge

crawl-ref/source/map-knowledge.cc:288–305

Iter over all known-but-unseen clouds & remove known-gone clouds.

/// Iter over all known-but-unseen clouds & remove known-gone clouds.
void update_cloud_knowledge()
{
    for (int x = X_BOUND_1; x <= X_BOUND_2; ++x)
    {
        for (int y = Y_BOUND_1; y <= Y_BOUND_2; ++y)
        {
            if (env.map_knowledge[x][y].update_cloud_state())
            {
#ifdef USE_TILE
                tile_draw_map_cell({x, y}, true);
#endif
#ifdef USE_TILE_WEB
                tiles.mark_for_redraw({x, y});
#endif
            }
        }
    }
}

/// If there's a cloud in this cell that we know should be gone, remove it.
/// Returns true if a cloud was removed.