geo_joinsel geo_sel nd_box_above nd_box_back nd_box_below nd_box_contains nd_box_from_stbox nd_box_front nd_box_left nd_box_overabove nd_box_overback nd_box_overbelow nd_box_overfront nd_box_overleft nd_box_overright nd_box_ratio_above nd_box_ratio_back nd_box_ratio_below nd_box_ratio_front nd_box_ratio_left nd_box_ratio_overabove nd_box_ratio_overback nd_box_ratio_overbelow nd_box_ratio_overfront nd_box_ratio_overleft nd_box_ratio_overright nd_box_ratio_position nd_box_ratio_right nd_box_right pg_get_nd_stats pg_nd_stats_from_tuple

nd_box_ratio_back() static double nd_box_ratio_back ( const ND_BOX *  b1, const ND_BOX *  b2  ) static Return the proportion of b2 that is back of b1.