introduce random genetic mutations

[blobs.git] / src / creature / goal.cpp

diff --git a/src/creature/goal.cpp b/src/creature/goal.cpp
index daf8f901d7989b780cb067712eb65e4b5e14cd3c..9d3e1254c870670e15db2f38eb28d08358af57e6 100644 (file)
--- a/src/creature/goal.cpp
+++ b/src/creature/goal.cpp
@@ -1,3 +1,4 @@
+#include "BlobBackgroundTask.hpp"
 #include "Goal.hpp"
 #include "IdleGoal.hpp"
 #include "LocateResourceGoal.hpp"
@@ -16,6 +17,71 @@
 namespace blobs {
 namespace creature {
 
+BlobBackgroundTask::BlobBackgroundTask(Creature &c)
+: Goal(c) {
+}
+
+BlobBackgroundTask::~BlobBackgroundTask() {
+}
+
+std::string BlobBackgroundTask::Describe() const {
+       return "being a blob";
+}
+
+void BlobBackgroundTask::Tick(double dt) {
+}
+
+void BlobBackgroundTask::Action() {
+       // check if eligible to split
+       if (GetCreature().Mass() > GetCreature().GetProperties().Birth().mass * 1.8) {
+               double fert = GetCreature().Fertility();
+               double rand = Assets().random.UNorm();
+               if (fert > rand) {
+                       std::cout << "[" << int(GetCreature().GetSimulation().Time())
+                               << "s] " << GetCreature().Name() << " split" << std::endl;
+                       Split(GetCreature());
+                       return;
+               }
+       }
+       // check for random property mutation
+       if (GetCreature().Mutability() > Assets().random.UNorm()) {
+               double amount = 1.0 + (Assets().random.SNorm() * 0.05);
+               auto &props = GetCreature().GetGenome().properties;
+               double r = Assets().random.UNorm();
+               math::Distribution *d = nullptr;
+               if (Assets().random.UNorm() < 0.5) {
+                       auto &set = props.props[(int(Assets().random.UNorm() * 4.0) % 4) + 1];
+                       if (r < 0.25) {
+                               d = &set.age;
+                       } else if (r < 0.5) {
+                               d = &set.mass;
+                       } else if (r < 0.75) {
+                               d = &set.fertility;
+                       } else {
+                               d = &set.highlight;
+                       }
+               } else {
+                       if (r < 0.2) {
+                               d = &props.strength;
+                       } else if (r < 0.4) {
+                               d = &props.stamina;
+                       } else if (r < 0.6) {
+                               d = &props.dexerty;
+                       } else if (r < 0.8) {
+                               d = &props.intelligence;
+                       } else {
+                               d = &props.mutability;
+                       }
+               }
+               if (Assets().random.UNorm() < 0.5) {
+                       d->Mean(d->Mean() * amount);
+               } else {
+                       d->StandardDeviation(d->StandardDeviation() * amount);
+               }
+       }
+}
+
+
 Goal::Goal(Creature &c)
 : c(c)
 , on_complete()
@@ -88,16 +154,6 @@ void IdleGoal::Tick(double dt) {
 }
 
 void IdleGoal::Action() {
-       // check if eligible to split
-       if (GetCreature().Mass() > GetCreature().GetProperties().Birth().mass * 1.8) {
-               double fert = GetCreature().Fertility();
-               double rand = Assets().random.UNorm();
-               if (fert > rand) {
-                       std::cout << "[" << int(GetCreature().GetSimulation().Time())
-                               << "s] " << GetCreature().Name() << " split" << std::endl;
-                       Split(GetCreature());
-               }
-       }
 }