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Assets/Plugins/ParadoxNotion/NodeCanvas/Modules/BehaviourTrees/Nodes/Composites/Sequencer.cs

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+using NodeCanvas.Framework;
+using ParadoxNotion;
+using ParadoxNotion.Design;
+using UnityEngine;
+
+namespace NodeCanvas.BehaviourTrees
+{
+
+    [Name("Sequencer", 10)]
+    [Category("Composites")]
+    [Description("Executes its children in order and returns Success if all children return Success. As soon as a child returns Failure, the Sequencer will stop and return Failure as well.")]
+    [ParadoxNotion.Design.Icon("Sequencer")]
+    [Color("bf7fff")]
+    public class Sequencer : BTComposite
+    {
+
+        [Tooltip("If true, then higher priority children are re-evaluated per frame and if either returns Failure, then the Sequencer will immediately stop and return Failure as well.")]
+        public bool dynamic;
+        [Tooltip("If true, the children order of execution is shuffled each time the Sequencer resets.")]
+        public bool random;
+
+        private int lastRunningNodeIndex = 0;
+
+        protected override Status OnExecute(Component agent, IBlackboard blackboard) {
+
+            for ( var i = dynamic ? 0 : lastRunningNodeIndex; i < outConnections.Count; i++ ) {
+
+                status = outConnections[i].Execute(agent, blackboard);
+
+                switch ( status ) {
+                    case Status.Running:
+
+                        if ( dynamic && i < lastRunningNodeIndex ) {
+                            for ( var j = i + 1; j <= lastRunningNodeIndex; j++ ) {
+                                outConnections[j].Reset();
+                            }
+                        }
+
+                        lastRunningNodeIndex = i;
+                        return Status.Running;
+
+                    case Status.Failure:
+
+                        if ( dynamic && i < lastRunningNodeIndex ) {
+                            for ( var j = i + 1; j <= lastRunningNodeIndex; j++ ) {
+                                outConnections[j].Reset();
+                            }
+                        }
+
+                        return Status.Failure;
+                }
+            }
+
+            return Status.Success;
+        }
+
+        protected override void OnReset() {
+            lastRunningNodeIndex = 0;
+            if ( random ) { outConnections = outConnections.Shuffle(); }
+        }
+
+        public override void OnChildDisconnected(int index) {
+            if ( index != 0 && index == lastRunningNodeIndex ) {
+                lastRunningNodeIndex--;
+            }
+        }
+
+        public override void OnGraphStarted() { OnReset(); }
+
+        ///----------------------------------------------------------------------------------------------
+        ///---------------------------------------UNITY EDITOR-------------------------------------------
+#if UNITY_EDITOR
+        protected override void OnNodeGUI() {
+            if ( dynamic ) { GUILayout.Label("<b>DYNAMIC</b>"); }
+            if ( random ) { GUILayout.Label("<b>RANDOM</b>"); }
+        }
+#endif
+
+    }
+}