Unity实现射击游戏光标自动瞄准

直接上代码

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;public class Target : MonoBehaviour {public Transform source;public GameObject destination = null;public static Target Instance;void Awake() {if (Instance == null)Instance = this;else if (Instance != this)Destroy(gameObject);}GameObject[] enemy;Vector3 minDestance;float minDes = float.MaxValue;void Update() {enemy = GameObject.FindGameObjectsWithTag("Enemy"); // 寻找敌人foreach (var item in enemy) {Vector3 targetDir = source.position - item.transform.position; // 目标坐标与当前坐标差的向量float angle = Vector3.Angle(-source.forward, targetDir); // 返回当前坐标与目标坐标的角度//前方夹角10度if (angle > 10) {minDestance = new Vector3(0, 0, 0);continue;}float DesX = source.position.x - item.transform.position.x;float DesY = source.position.y - item.transform.position.y;float DesZ = source.position.z - item.transform.position.z;//设置最大距离if (DesZ > 500) {minDestance = new Vector3(0, 0, 0);continue;}Vector3 temp = new Vector3(DesX, DesY, DesZ);float min = (source.position - temp).sqrMagnitude;//寻找最近目标if (min < minDes) {minDes = min;minDestance = temp;destination = item;}}float ratio = (source.position.z - transform.position.z) / minDestance.z;if (minDestance != Vector3.zero) {Vector3 newPos = new Vector3(source.position.x - minDestance.x * ratio, source.position.y - minDestance.y * ratio, transform.position.z);transform.position = Vector3.MoveTowards(transform.position, newPos, 0.5f);if (destination == null) {minDestance = new Vector3(0, 0, 0);}}else {minDes = float.MaxValue;destination = null;}}
}

主要的逻辑是运用相似三角形原理，通过角度计算三维坐标。

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