sourcePosition	The origin of the distance query.
hit	Holds the properties of the resulting location.
passableMask	A mask specifying which NavMesh layers can be passed when finding the nearest edge.

Returns
bool True if a nearest edge is found.

Locate the closest NavMesh edge from a point on the NavMesh.

The returned NavMeshHit object contains the position and details of the nearest point on the nearest edge of the navmesh. Since an edge typically corresponds to a wall or other large object, this could be used to make a character take cover as close to the wall as possible.

	var mesh: NavMesh;
	var player: Transform;
	// Move a marker object to show a position of cover
	// that the player should head for.
	function IndicateCoverPosition() {
		var hit: NavMeshHit;
		
		if (mesh.FindClosestEdge(player.position, hit, -1)) {
			transform.position = hit.position;
		}
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public NavMesh mesh;
    public Transform player;
    void IndicateCoverPosition() {
        NavMeshHit hit;
        if (mesh.FindClosestEdge(player.position, out hit, -1))
            transform.position = hit.position;
        
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public mesh as NavMesh

	public player as Transform

	def IndicateCoverPosition() as void:
		hit as NavMeshHit
		if mesh.FindClosestEdge(player.position, , -1):
			transform.position = hit.position