tree stuff

Projects/UOContent/Mobiles/BT/Composite/RandomSelectorNode.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Server.Mobiles.BT
+{
+    public class RandomSelectorNode : CompositeNode
+    {
+        private Dictionary<BaseCreature, int> retryCache = new Dictionary<BaseCreature, int>();
+        public RandomSelectorNode(BehaviorTree tree) : base(tree)
+        {
+        }
+        public override Result Execute(BaseCreature mob, Blackboard blackboard)
+        {
+            if (!Tree.Claims.TryGetValue(mob, out BehaviorTreeNode node) || node != this)
+            {
+                Tree.Claim(mob, this);
+            }
+
+            if (!currentTaskCache.TryGetValue(mob, out int currentTask))
+            {
+                currentTask = Utility.RandomMinMax(0, Children.Count - 1);
+                currentTaskCache.Add(mob, currentTask);
+            }
+
+            if (!retryCache.TryGetValue(mob, out int currentIteration))
+            {
+                currentIteration = 0;
+                retryCache.Add(mob, currentIteration);
+            }
+
+            var result = Children[currentTask].Execute(mob, blackboard);
+
+            if (result == Result.Running)
+            {
+                return Result.Running;
+            }
+            else if (result == Result.Failure)
+            {
+                currentIteration++;
+                currentTaskCache[mob] = Utility.RandomMinMax(0, Children.Count - 1);
+                if (currentIteration >= Children.Count)
+                {
+                    retryCache[mob] = 0;
+                    Tree.Release(mob);
+                    return Result.Failure;
+                }
+                retryCache[mob] = currentIteration;
+                return Result.Running;
+            }
+
+            retryCache[mob] = 0;
+            currentTaskCache[mob] = 0;
+            Tree.Release(mob);
+            return Result.Success;
+        }
+    }
+}