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‎Runtime/Nodes/Control/SequenceNode.cs‎
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+53Lines changed: 53 additions & 0 deletions b/Collapse file
‎Runtime/Nodes/Control/SequenceNode.cs‎
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+53Lines changed: 53 additions & 0 deletions
diff --git a/Collapse file
‎Runtime/Nodes/Control/SequenceNode.cs.meta‎
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+11Lines changed: 11 additions & 0 deletions b/Collapse file
‎Runtime/Nodes/Control/SequenceNode.cs.meta‎
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+11Lines changed: 11 additions & 0 deletions
@@ -0,0 +1,53 @@
+using System.Collections.Generic;
+
+namespace BehaviorTree.NET.Nodes.Control
+{
+    public class SequenceNode : ControlNode
+    {
+        private int currentRunningIndex;
+
+        public SequenceNode(IEnumerable<INode> children)
+            : base(children)
+        {
+            this.currentRunningIndex = 0;
+        }
+
+        public override NodeStatus Tick()
+        {
+            for (int i = 0; i < this.Children.Count; i++)
+            {
+                var child = this.Children[i];
+                var status = child.Tick();
+                switch (status)
+                {
+                    case NodeStatus.SUCCESS:
+                        continue;
+                    case NodeStatus.FAILURE:
+                        this.Halt();
+                        return status;
+                    case NodeStatus.RUNNING:
+                        if (i != this.currentRunningIndex)
+                        {
+                            // a new child is running, all children after i, up to the previously running child (inclusive) should be halted
+                            for (int j = i + 1; j <= this.currentRunningIndex; j++)
+                            {
+                                this.HaltChild(j);
+                            }
+                        }
+
+                        this.currentRunningIndex = i;
+                        return status;
+                }
+            }
+
+            this.Halt();
+            return NodeStatus.SUCCESS;
+        }
+
+        public override void Halt()
+        {
+            this.currentRunningIndex = 0;
+            base.Halt();
+        }
+    }
+}