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Assets/AstarPathfindingProject/Behaviors/Patrol.cs

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+using UnityEngine;
+using System.Collections;
+
+namespace Pathfinding {
+	/// <summary>
+	/// Simple patrol behavior.
+	/// This will set the destination on the agent so that it moves through the sequence of objects in the <see cref="targets"/> array.
+	/// Upon reaching a target it will wait for <see cref="delay"/> seconds.
+	///
+	/// See: <see cref="Pathfinding.AIDestinationSetter"/>
+	/// See: <see cref="Pathfinding.AIPath"/>
+	/// See: <see cref="Pathfinding.RichAI"/>
+	/// See: <see cref="Pathfinding.AILerp"/>
+	/// </summary>
+	[UniqueComponent(tag = "ai.destination")]
+	[HelpURL("http://arongranberg.com/astar/docs/class_pathfinding_1_1_patrol.php")]
+	public class Patrol : VersionedMonoBehaviour {
+		/// <summary>Target points to move to in order</summary>
+		public Transform[] targets;
+
+		/// <summary>Time in seconds to wait at each target</summary>
+		public float delay = 0;
+
+		/// <summary>Current target index</summary>
+		int index;
+
+		IAstarAI agent;
+		float switchTime = float.PositiveInfinity;
+
+		protected override void Awake () {
+			base.Awake();
+			agent = GetComponent<IAstarAI>();
+		}
+
+		/// <summary>Update is called once per frame</summary>
+		void Update () {
+			if (targets.Length == 0) return;
+
+			bool search = false;
+
+			// Note: using reachedEndOfPath and pathPending instead of reachedDestination here because
+			// if the destination cannot be reached by the agent, we don't want it to get stuck, we just want it to get as close as possible and then move on.
+			if (agent.reachedEndOfPath && !agent.pathPending && float.IsPositiveInfinity(switchTime)) {
+				switchTime = Time.time + delay;
+			}
+
+			if (Time.time >= switchTime) {
+				index = index + 1;
+				search = true;
+				switchTime = float.PositiveInfinity;
+			}
+
+			index = index % targets.Length;
+			agent.destination = targets[index].position;
+
+			if (search) agent.SearchPath();
+		}
+	}
+}