Raycasting问题Unity

Question

我需要阅读玩家汽车在2辆AI汽车上获得第1，第2或第3天气的天气，我试图使用光线投射来实现这一点无济于事。我定期在关卡中设置航点，并设置一个系统，当AI或玩家进入时设置新的航点，然后它将光线绘制到下一个检查点，以便我可以使用hit.distance计算其距离，然后分配该距离对变量float的每次更新。然而，它没有得到正确的顺序，当我第一次出现时，它会在调试中显示所有可能的组合。 我想到的主要问题是当我调试距离时，我就在航点旁边，它可能会说300，或者它可以说是0.003447或者其他东西而且它让我感到困惑。

以下是投射光线的脚本：

    using UnityEngine;
using System.Collections;

public class RaceManager : MonoBehaviour {
    public GameObject seeking;
    public float distance1;
    public float distance2;
    public float distance3;
    public int playerPos;

    void Update (){
        Debug.Log (playerPos);
        //Firing Rays to the target every update and recording its distance.
        if (this.gameObject.name == "Player") {
            RaycastHit hit;
            Ray playerRay = new Ray (this.gameObject.transform.position, seeking.transform.position);
            if (Physics.Raycast (playerRay, out hit)) {
                distance1 = hit.distance;
                Debug.DrawLine (this.transform.position, seeking.transform.position);
            }
        }
        if (this.gameObject.name == "AICar1"){
        RaycastHit hit;
        Ray playerRay = new Ray (this.gameObject.transform.position, seeking.transform.position);
        if (Physics.Raycast (playerRay, out hit)){
                distance2 = hit.distance;
                Debug.DrawLine(this.transform.position, seeking.transform.position);
        }
    }
        if (this.gameObject.name == "AICar2") {
        RaycastHit hit;
        Ray playerRay = new Ray (this.gameObject.transform.position, seeking.transform.position);
            if (Physics.Raycast (playerRay, out hit)){
                distance3 = hit.distance;
                Debug.DrawLine(this.transform.position, seeking.transform.position);

            }
        }

        //Decide placement based on Ray Length.
        //If Player is first.
        if (distance1 < distance2 && distance1 < distance3) {
                playerPos = 1;
            }
        else if (distance1 < distance2 && distance1 > distance3 || distance1 > distance2 && distance1 < distance3) {
                playerPos = 2;
        }
        else {
                playerPos = 3;
        }
    }
}

这是负责在玩家或AI到达时更改目标的脚本

    using UnityEngine;
using System.Collections;

public class RaceManager : MonoBehaviour {
    public GameObject seeking;
    public float distance1;
    public float distance2;
    public float distance3;
    public int playerPos;

    void Update (){
        Debug.Log (playerPos);
        //Firing Rays to the target every update and recording its distance.
        if (this.gameObject.name == "Player") {
            RaycastHit hit;
            Ray playerRay = new Ray (this.gameObject.transform.position, seeking.transform.position);
            if (Physics.Raycast (playerRay, out hit)) {
                distance1 = hit.distance;
                Debug.DrawLine (this.transform.position, seeking.transform.position);
            }
        }
        if (this.gameObject.name == "AICar1"){
        RaycastHit hit;
        Ray playerRay = new Ray (this.gameObject.transform.position, seeking.transform.position);
        if (Physics.Raycast (playerRay, out hit)){
                distance2 = hit.distance;
                Debug.DrawLine(this.transform.position, seeking.transform.position);
        }
    }
        if (this.gameObject.name == "AICar2") {
        RaycastHit hit;
        Ray playerRay = new Ray (this.gameObject.transform.position, seeking.transform.position);
            if (Physics.Raycast (playerRay, out hit)){
                distance3 = hit.distance;
                Debug.DrawLine(this.transform.position, seeking.transform.position);

            }
        }

        //Decide placement based on Ray Length.
        //If Player is first.
        //All signs reversed for testing
        if (distance1 < distance2 && distance1 < distance3) {
                playerPos = 1;
            }
        else if (distance1 < distance2 && distance1 > distance3 || distance1 > distance2 && distance1 < distance3) {
                playerPos = 2;
        }
        else {
                playerPos = 3;
        }
    }
}

Answer 1

如果您知道感兴趣的航点的位置以及环境中所有车辆的位置，那么只需使用Vector3班Vector3.Distance中的静态距离函数。只需隐藏对车辆的引用即可。变换，然后测量每辆车与相关航路点之间的距离。使用光线投射方法来做你想做的事情会有更多的开销。