Physics.RaycastAll使用標籤查找敵人

Question

我是新來的團隊，我想要做的就是創建一個raycast，它可以找到所有標記爲敵人的對象，這些對象位於我的玩家面前，如果他們在當我按下F鍵時，需要每個人的健康，有人可以幫助我嗎？這裏是我的代碼：

using UnityEngine; 
using System.Collections; 

public class meleeAttack : MonoBehaviour { 
public GameObject target; 
public float attackTimer; 
public float coolDown; 

private RaycastHit hit; 


// Use this for initialization 
void Start() { 
    attackTimer = 0; 
    coolDown = 0.5f; 

} 

// Update is called once per frame 
void Update() { 


    if(attackTimer > 0) 
     attackTimer -= Time.deltaTime; 

    if(attackTimer < 0) 
     attackTimer = 0; 

    if (Input.GetKeyUp(KeyCode.F)) { 
     if(attackTimer == 0) 
     Attack(); 
     attackTimer = coolDown; 
    } 
} 

private void Attack() { 



    float distance = Vector3.Distance(target.transform.position, transform.position); 

    Vector3 dir = (target.transform.position - transform.position).normalized; 

    float direction = Vector3.Dot(dir, transform.forward); 

    Debug.Log(direction); 
    if (distance < 3 && direction > 0.5) { 
     enemyhealth eh = (enemyhealth)target.GetComponent("enemyhealth"); 
     eh.AddjustCurrentHealth(-10); 
    } 
} 
} 

---

using UnityEngine; 
using System.Collections; 

public class enemyhealth : MonoBehaviour { 

public int maxHealth = 100; 
public int currentHealth = 100; 


public float healthBarLength; 
// Use this for initialization 
void Start() { 
    healthBarLength = Screen.width/2; 
} 

// Update is called once per frame 
void Update() { 
    AddjustCurrentHealth(0); 
} 

void OnGUI() { 
    GUI.Box(new Rect(10, 40, healthBarLength, 20), currentHealth + "/" + maxHealth); 
} 

public void AddjustCurrentHealth(int adj){ 
    currentHealth += adj; 
    if (currentHealth < 0) 
     currentHealth = 0; 

    if (currentHealth > maxHealth) 
     currentHealth = maxHealth; 

    if (maxHealth < 1) 
     maxHealth = 1; 

    healthBarLength = (Screen.width/2) * (currentHealth/(float)maxHealth); 
} 
} 

Answer 1

private void Attack(){ 
    int user_defined_layer = 8; //use the 'User Layer' you created to define NPCs 
    int layer_mask = 1 << user_defined_layer; 

    RaycastHit[] hits; 

    // Get direction in front of your player 
    Vector3 direction = transform.TransformPoint(Vector3.forward); 
    hits = Physics.RaycastAll(transform.position, direction, Mathf.Infinity, layer_mask) 

    foreach(RaycastHit hit in hits) 
    { 
     //NPC is hit, decrease his/her/its life 
    } 
} 

這是最好的，你不要試圖從你的位置的方向導出到您的NPC。讓Unity的光線投射引擎爲您處理ray-NPC相交測試。這種方法確實需要你的NPC有一個對撞機。