538 

   539 void DoTriggerIndustry(Industry *ind, IndustryTileTrigger trigger)

   540 {

   541 	ResolverObject object;

   542 

   543 	NewIndustryResolver(&object, ind->xy, ind);

   544 	object.callback = CBID_RANDOM_TRIGGER;

   545 	object.trigger = trigger;

   546 

   547 	const SpriteGroup *group = Resolve(GetIndustrySpec(ind->type)->grf_prop.spritegroup, &object);

   548 	if (group == NULL) return;

   549 

   550 	byte new_random_bits = Random();

   551 	ind->random &= ~object.reseed;

   552 	ind->random |= new_random_bits & object.reseed;

   553 }