Option to make AI characters flee when their health is below a specific threshold

Barotrauma/Content/Characters/Crawler/crawler.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8" ?>
-<Character name ="crawler" humanoid="false">
+<Character name ="crawler" humanoid="false" health="100">
   <sound file="Content/Characters/Crawler/attack1.ogg" state="Attack" range="500"/>
   <sound file="Content/Characters/Crawler/attack2.ogg" state="Attack" range="500"/>
 
@@ -78,6 +78,7 @@
 
   <ai attackhumans="500" attackrooms="50.0" attackweaker="50" attackstronger="-30" 
       sight="0.5" hearing="1.0"
+      fleehealththreshold="10"
       attackcooldown="3.0"/>
 </Character>
 

Barotrauma/Content/Characters/Mantis/mantis.xml

@@ -95,6 +95,7 @@
     attackprioritystronger="-30"
     attackcooldown="1.0"
     sight="0.5"
-    hearing="1.0"/>
+    hearing="1.0"
+    fleehealththreshold="20"/>
 </Character>
 

Barotrauma/Source/Characters/AI/EnemyAIController.cs

@@ -48,6 +48,9 @@ namespace Barotrauma
 
         //the limb selected for the current attack
         private Limb attackingLimb;
+
+        //flee when the health is below this value
+        private float fleeHealthThreshold;
         
         private AITarget selectedAiTarget;
         private AITargetMemory selectedTargetMemory;
@@ -89,6 +92,8 @@ namespace Barotrauma
 
             attackWhenProvoked = ToolBox.GetAttributeBool(aiElement, "attackwhenprovoked", false);
 
+            fleeHealthThreshold = ToolBox.GetAttributeFloat(aiElement, "fleehealththreshold", 0.0f);
+
             outsideSteering = new SteeringManager(this);
             insideSteering = new IndoorsSteeringManager(this, false);
 
@@ -146,7 +151,7 @@ namespace Barotrauma
                 }
                 else
                 {
-                    state = (targetValue > 0.0f) ? AiState.Attack : AiState.Escape;
+                    state = (targetValue < 0.0f || Character.Health < fleeHealthThreshold) ? AiState.Escape : AiState.Attack;
                 }
                 //if (coolDownTimer >= 0.0f) return;
             }