static function Raycast (sourcePosition : Vector3, targetPosition : Vector3, out hit : NavMeshHit, passableMask : int) : boolean

Parameters

Returns

boolean - True if the ray is terminated before reaching target position. Otherwise returns false.

Description

Trace a line between two points on the NavMesh.

This function follows the path of a "ray" between the specified source and target positions on the navmesh. If an obstruction is encountered along the line then a true value is returned and the position and other details of the obstructing object are stored in the hit parameter. This can be used to check if there is a clear shot or line of sight between a character and a target object. This function is preferable to the similar Physics.Raycast because the line tracing is performed in a simpler way using the navmesh and has a lower processing overhead.

    var mesh: NavMesh;
    var target: Transform;
    function Update () {
        var hit: NavMeshHit;
        
        // Note the negative test condition! Using -1 for the mask 
        // indicates all layers are to be used.
        if (!mesh.Raycast(transform.position, target.position, hit, -1)) {
            // Target is "visible" from our position.
        }
    }

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public NavMesh mesh;
    public Transform target;
    void Update() {
        NavMeshHit hit;
        if (!mesh.Raycast(transform.position, target.position, out hit, -1)) {
        }
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public mesh as NavMesh

    public target as Transform

    def Update():
        hit as NavMeshHit
        if not mesh.Raycast(transform.position, target.position, hit, -1):
            pass