NavMesh.AllAreas

描述

包含所有导航网格区域的区域遮罩常量。

Use the mask in query functions, such as Raycast, to indicate that all NavMesh area types are accepted.

// TargetReachable
using UnityEngine;
using UnityEngine.AI;

public class TargetReachable : MonoBehaviour
{
    public Transform target;
    private NavMeshHit hit;
    private bool blocked = false;

    void Update()
    {
        // Allow pass through all area types when testing if the target position
        // is reachable from the transform location.
        blocked = NavMesh.Raycast(transform.position, target.position, out hit, NavMesh.AllAreas);
        Debug.DrawLine(transform.position, target.position, blocked ? Color.red : Color.green);
        if (blocked)
            Debug.DrawRay(hit.position, Vector3.up, Color.red);
    }
}

另请参阅： Areas and Costs，了解如何使用不同的区域类型。