[Player] Add AI Pathfinding on a 2D grid to the player character

Assets/External/AstarPathfindingProject/ExampleScenes/ExampleScripts/SnapToNode.cs

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+using UnityEngine;
+using System.Collections;
+using Pathfinding;
+
+/// <summary>
+/// Helper editor script to snap an object to the closest node.
+/// Used in the "Turn Based" example scene for snapping obstacles to the hexagon grid.
+/// </summary>
+[ExecuteInEditMode]
+[HelpURL("http://arongranberg.com/astar/docs/class_snap_to_node.php")]
+public class SnapToNode : MonoBehaviour {
+	void Update () {
+		if (transform.hasChanged && AstarPath.active != null) {
+			var node = AstarPath.active.GetNearest(transform.position, NNConstraint.None).node;
+			if (node != null) {
+				transform.position = (Vector3)node.position;
+				transform.hasChanged = false;
+			}
+		}
+	}
+}