Random chance now supports seeds

Author: ashblue

Assets/FluidBehaviorTree/Scripts/BehaviorTree/BehaviorTreeBuilderBase.cs

@@ -102,18 +102,19 @@ public T Condition (Func<bool> action) {
             return Condition("condition", action);
         }
 
-        public T RandomChance (string name, int chance, int outOf) {
+        public T RandomChance (string name, int chance, int outOf, int seed = 0) {
             _tree.AddNode(Pointer, new RandomChance {
                 Name = name,
                 chance = chance,
-                outOf = outOf
+                outOf = outOf,
+                seed = seed
             });
 
             return (T)this;
         }
 
-        public T RandomChance (int chance, int outOf) {
-            return RandomChance("random chance", chance, outOf);
+        public T RandomChance (int chance, int outOf, int seed = 0) {
+            return RandomChance("random chance", chance, outOf, seed);
         }
 
         public T Wait (string name, int turns = 1) {

Assets/FluidBehaviorTree/Scripts/Tasks/Conditions/RandomChance.cs

@@ -2,13 +2,32 @@
 
 namespace Adnc.FluidBT.Tasks {
     public class RandomChance : ConditionBase {
+        private Random.State _state;
+        
         public float chance = 1;
         public float outOf = 1;
-        
+        public int seed;
+
+        protected override void OnInit () {                
+            var oldState = Random.state;
+
+            if (seed != 0) {
+                Random.InitState(seed);
+            }
+
+            _state = Random.state;
+            Random.state = oldState;
+        }
+
         protected override bool OnUpdate () {
+            var oldState = Random.state;
+            Random.state = _state;
+            
             var percentage = chance / outOf;
             var rng = Random.value;
 
+            Random.state = oldState;
+            
             return rng <= percentage;
         }
     }