/* 00 01 02 03 04 05 06 07 08 09 ->>> x 00 xx xx xx xx xx xx xx xx xx xx 01 xx xx 02 xx xx 03 xx xx xx xx xx xx 04 xx xx 18 1A xx xx 05 xx xx 18 1B xx xx 06 xx xx 19 1C xx xx 07 xx xx xx xx xx xx 08 xx xx 09 xx xx 10 xx xx xx xx xx xx xx xx xx xx ^ ^ | y switch (FEAT_INDUSTRIES, SELF, oil_rig_location_callback, industry_distance(INDUSTRYTYPE_OIL_RIG, -1) ) { 0..6: CB_RESULT_LOCATION_DISALLOW; CB_RESULT_LOCATION_ALLOW; } */