Targetting

最新推荐文章于 2024-09-27 14:46:53 发布

原创最新推荐文章于 2024-09-27 14:46:53 发布 · 814 阅读

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#vector #distance #include #go #class #list

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本文介绍了一个使用Unity实现的游戏内敌人目标选择系统。该系统通过自动查找所有带有“Enemy”标签的游戏对象并将其添加到目标列表中，实现了按距离排序的目标切换功能，并允许玩家通过Tab键在敌人之间进行切换。

using UnityEngine;
using System.Collections;
using System.Collections.Generic;	// which include Generic

public class Targetting : MonoBehaviour {
	public List<Transform> targets;
	public Transform selectedTarget;
	
	private Transform myTransform;
	
	// Use this for initialization
	void Start () {
		targets = new List<Transform>();
		selectedTarget = null;
		myTransform = transform;
		
		AddAllEnemies();
	}
	
	// Get a list of enemies
	public void AddAllEnemies () {
		GameObject[] go = GameObject.FindGameObjectsWithTag("Enemy");
		
		foreach(GameObject enemy in go)
			AddTarget(enemy.transform);
	}
	
	public void AddTarget(Transform enemy) {
		targets.Add(enemy);
	}
	
	// Sort by distance in descending order
	private void SortTargetsByDistance () {
		targets.Sort(delegate(Transform t1, Transform t2) {
					return Vector3.Distance(t1.position, myTransform.position).CompareTo(Vector3.Distance(t2.position, myTransform.position));			
				});
	}
	
	// Some sets
	private void TargetEnemy () {
		if (selectedTarget == null) {
			SortTargetsByDistance();
			selectedTarget = targets[0];
		}
		else {
		// Loop switcher in List<Transform> targets
			int index = targets.IndexOf(selectedTarget);
			
			if (index < targets.Count - 1)
				index++;
			else
				index = 0;
			
			DselectTarget();
			selectedTarget = targets[index];	
		}
		SelectTarget();
	}
	
	// Render the selectedTarget
	private void SelectTarget () {
		selectedTarget.renderer.material.color = Color.red;
	}

	private void DselectTarget () {
		selectedTarget.renderer.material.color = Color.blue;
	}
	
	// Update is called once per frame
	void Update () {
		if (Input.GetKeyDown(KeyCode.Tab)) {
			TargetEnemy();
		}
	}
}