Silo scaling (#360)

* scaling

* round

code/controllers/subsystem/silo.dm

@@ -16,7 +16,11 @@ SUBSYSTEM_DEF(silo)
 /datum/controller/subsystem/silo/fire(resumed = 0)
 	var/datum/job/xeno_job = SSjob.GetJobType(/datum/job/xenomorph)
 	var/active_humans = length(GLOB.humans_by_zlevel[SSmonitor.gamestate == SHIPSIDE ? "3" : "2"])
-	var/active_xenos = length(GLOB.alive_xeno_list_hive[XENO_HIVE_NORMAL]) + (xeno_job.total_positions - xeno_job.current_positions)
+	var/active_xenos = xeno_job.total_positions - xeno_job.current_positions //burrowed
+	for(var/mob/living/carbon/xenomorph/xeno AS in GLOB.alive_xeno_list_hive[XENO_HIVE_NORMAL])
+		if(xeno.xeno_caste.caste_flags & CASTE_IS_A_MINION)
+			continue
+		active_xenos ++
 	//The larval spawn is based on the amount of silo, ponderated with a define. Larval follow a f(x) = (x + a)/(1 + a) * something law, which is smoother that f(x) = x * something
 	current_larva_spawn_rate = length(GLOB.xeno_resin_silos_by_hive[XENO_HIVE_NORMAL]) ? SILO_OUTPUT_PONDERATION + length(GLOB.xeno_resin_silos_by_hive[XENO_HIVE_NORMAL]) : 0
 	//We then are normalising with the number of alive marines, so the balance is roughly the same whether or not we are in high pop
@@ -27,7 +31,9 @@ SUBSYSTEM_DEF(silo)
 	current_larva_spawn_rate *= SSmonitor.gamestate == SHIPSIDE ? 3 : 1
 	current_larva_spawn_rate *= SSticker.mode.silo_scaling
 	//We scale the rate based on the current ratio of humans to xenos
-	current_larva_spawn_rate *= clamp(round((active_humans / active_xenos) / (LARVA_POINTS_REGULAR / xeno_job.job_points_needed), 0.01), 0.5, 1)
+	var/current_human_to_xeno_ratio = active_humans / active_xenos
+	var/optimal_human_to_xeno_ratio = xeno_job.job_points_needed / LARVA_POINTS_REGULAR
+	current_larva_spawn_rate *= clamp(round(current_human_to_xeno_ratio / optimal_human_to_xeno_ratio, 0.01), 0.5, 2)
 
 	current_larva_spawn_rate += larva_spawn_rate_temporary_buff