Added population growth boosting policy.

freeorion · Jun 5, 2020 · 5c9b502 · 5c9b502
1 parent 1faeb26
commit 5c9b502
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Showing 4 changed files with 29 additions and 1 deletion.
diff --git a/default/scripting/policies/POPULATION.focs.txt b/default/scripting/policies/POPULATION.focs.txt
@@ -0,0 +1,9 @@
+Policy
+    name = "PLC_POPULATION"
+    description = "PLC_POPULATION_DESC"
+    short_description = "PLC_POPULATION_SHORT_DESC"
+    category = "SOCIAL_CATEGORY"
+    adoptioncost = 10
+    graphic = "icons/focus/growth.png"
+
+#include "/scripting/common/priorities.macros"
diff --git a/default/scripting/species/common/population.macros b/default/scripting/species/common/population.macros
@@ -1,3 +1,11 @@
+
+GROWTH_RATE_FACTOR
+'''
+0.005 *
+(1 - (Statistic If condition = EmpireHasAdoptedPolicy name = "PLC_NO_GROWTH")) *    // no growth with no-growth policy
+(1 + 0.5*(Statistic If condition = EmpireHasAdoptedPolicy name = "PLC_POPULATION")) // +50% growth with population policy
+'''
+
 BASIC_POPULATION
 '''
         [[HOMEWORLD_BONUS_POPULATION]]
@@ -18,7 +26,8 @@ BASIC_POPULATION
             priority = [[EARLY_FIRST_NATURAL_POPULATION_PRIORITY]]
             effects = SetPopulation value =
                 (Statistic If condition = (Value < Target.TargetPopulation) *
-                    min(Target.TargetPopulation, Value + Value*0.01*(Target.TargetPopulation + 1 - Value)))
+                    min(Target.TargetPopulation, Value + Value*[[GROWTH_RATE_FACTOR]]*
+                                                               (Target.TargetPopulation + 1 - Value)))
               + (Statistic If condition = (Value >= Target.TargetPopulation) *
                     max(Target.TargetPopulation, Value - 0.1*(Value - Target.TargetPopulation)))
 

diff --git a/default/scripting/techs/growth/NANOTECH_MED.focs.txt b/default/scripting/techs/growth/NANOTECH_MED.focs.txt
@@ -10,6 +10,7 @@ Tech
         "GRO_GENETIC_MED"
         "PRO_NANOTECH_PROD"
     ]
+    unlock = Item type = Policy name = "PLC_POPULATION"
     graphic = "icons/tech/nanotech_medicine.png"
 
 #include "/scripting/common/base_prod.macros"
diff --git a/default/stringtables/en.txt b/default/stringtables/en.txt
@@ -10891,6 +10891,15 @@ Prevents planets from increasing population from turn to turn.
 PLC_NO_GROWTH_SHORT_DESC
 Stops planet growth
 
+PLC_POPULATION
+Population
+
+PLC_POPULATION_DESC
+Increases Growth Rate
+
+PLC_POPULATION_SHORT_DESC
+Increases natural population growth rate by 50%.
+
 PLC_NO_SUPPLY
 No Supply