Question

JavaScript => public function SamplePathPosition(areaMask: int, maxDistance: float, out hit: NavMeshHit): bool;
C# => public bool SamplePathPosition(int areaMask, float maxDistance, out NavMeshHit hit);

Parameters 参数

areaMask	A bitfield mask specifying which NavMesh areas can be passed when tracing the path.
maxDistance	Terminate scanning the path at this distance.
hit	Holds the properties of the resulting location.

Returns 返回

bool True if terminated before reaching the position at maxDistance, false otherwise.

Description 描述

Sample a position along the current path.

沿着当前路径的样本位置。

This function looks ahead a specified distance along the current path. Details of the mesh at that position are then returned in a NavMeshHit object. This could be used, for example, to check the type of surface that lies ahead before the character gets there - a character could raise his gun above his head if he is about to wade through water, say.

该函数看向当前路径前方指定距离。然后在NavMeshHit对象中返回该位置的网格的详细信息。这可以被使用，例如，检查角色到达那儿之前的表面类型——如果角色要涉水，那么他可以把枪举高到头顶之上。

JavaScript:

#pragma strict
public var target: Transform;
public var mesh: NavMesh;
private var agent: NavMeshAgent;
private var waterMask: int;
function Start() {
	agent = GetComponent.<NavMeshAgent>();
	waterMask = 1 << NavMesh.GetAreaFromName("Water");
	agent.SetDestination(target.position);
}
function Update() {
	var hit: NavMeshHit;
	// Check all areas one length unit ahead.
	if (!agent.SamplePathPosition(NavMesh.AllAreas, 1.0F, hit))if ((hit.mask & waterMask) != 0) {
		// Water detected along the path...
	}
}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    public Transform target;
    public NavMesh mesh;
    private NavMeshAgent agent;
    private int waterMask;
 
 
    void Start() {
        agent = GetComponent<NavMeshAgent>();
        waterMask = 1 << NavMesh.GetAreaFromName("Water");
        agent.SetDestination(target.position);
    }
 
 
    void Update() {
        NavMeshHit hit;
 
        // Check all areas one length unit ahead.
        if (!agent.SamplePathPosition(NavMesh.AllAreas, 1.0F, out hit))
            if ((hit.mask & waterMask) != 0) {
            	// Water detected along the path...
            }
    }
}

navmeshagent