光线投射问题统一

我需要读取玩家汽车对阵 2 辆 AI 汽车的第一、第二或第三的天气，我试图使用光线投射来实现这一点，但无济于事。我定期在关卡中设置航点，并有一个系统，当AI或玩家进入新航点时，它会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，然后将每次更新的距离分配给变量浮点数。但是，它没有获得正确的顺序，当我第一次出现时，它会在调试中显示所有可能的组合。我认为主要问题出现在我调试距离时，我就在航点旁边，它可能说 300，或者它可能说 0.003447 或其他什么，这真的让我感到困惑。

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到达目标时更改目标的脚本

    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;
        }
    }
}