实现：

1.给鸟类随机播放随机动画使得每一只鸟扇翅膀的频率都不尽相同

2.可以自行添加权重，并在最后 sumForce = separationForce + cohesionForce + alignmentForce;分别乘上相应权重，这样鸟就能快速飞行和转向辣

using System.Collections.Generic;
using UnityEngine;
using System.Collections;public class BoidsCode1 : MonoBehaviour {Rigidbody rb;//鸟群存储线性表public List<GameObject> birdNeighbors = new List<GameObject>();//separation分离  alignment对齐 cohesion凝聚public Vector3 separationForce = Vector3.zero;public Vector3 alignmentForce = Vector3.zero;public Vector3 cohesionForce = Vector3.zero;//平均位置,鸟群朝向public Vector3 averagePosition = Vector3.zero;public Vector3 birdForward = Vector3.zero;//鸟群速度public Vector3 birdVelocity = Vector3.zero;//总力public Vector3 sumForce;//检测间隔public float checkInterval = 0.2f;//检测距离public float checkDistance = 2;//分离力最大值public float maxSeparationForce = 1.0f;private void Awake() {rb = GetComponent<Rigidbody>();}private void Start() {InvokeRepeating("CalcForce", 0, checkInterval);}//计算函数private void CalcForce() {//清空邻居鸟的列表birdNeighbors.Clear();//检测到范围内所有的鸟Collider[] colliders = Physics.OverlapSphere(transform.position, checkDistance);foreach (Collider collider in colliders) {if (collider != null && collider.gameObject != this.gameObject) {//添加到列表里面birdNeighbors.Add(collider.gameObject);}}//平均点位置为0averagePosition = Vector3.zero;//朝向设置为0birdForward = Vector3.zero;birdVelocity = Vector3.zero;separationForce = Vector3.zero; //分离力重设cohesionForce = Vector3.zero; //凝聚力重设alignmentForce = Vector3.zero; //对齐力重设foreach (GameObject bird in birdNeighbors) {//设定分离力的方向Vector3 spForceDirection = (this.transform.position - bird.transform.position);if (spForceDirection.magnitude > 0) {separationForce += spForceDirection.normalized / spForceDirection.sqrMagnitude;}//得到鸟群位置(加起来的和)averagePosition += bird.transform.position;//得到鸟群的方向和速度birdForward += bird.transform.forward;birdVelocity += bird.GetComponent<Rigidbody>().velocity;}//限制分离力的最大值if (separationForce.magnitude > maxSeparationForce) {separationForce = separationForce.normalized * maxSeparationForce;}//计算平均位置if (birdNeighbors.Count > 0) {averagePosition /= birdNeighbors.Count;}//设定凝聚力的方向Vector3 cohesionDirection = (averagePosition - transform.position).normalized;if (cohesionDirection.magnitude > 0) {cohesionForce += cohesionDirection;}//求取平均速度if (birdNeighbors.Count > 0) {alignmentForce = birdVelocity / birdNeighbors.Count;}施加分离力//rb.AddForce(separationForce, ForceMode.VelocityChange);施加凝聚力//rb.AddForce(cohesionForce, ForceMode.VelocityChange);施加对齐力//rb.AddForce(alignmentForce, ForceMode.VelocityChange);sumForce = separationForce + cohesionForce + alignmentForce;rb.AddForce(sumForce,ForceMode.Force);// 仅当当前鸟不是头鸟时，才设置朝向if (birdForward.magnitude > 0 && !gameObject.CompareTag("Leader")) {this.transform.forward = birdForward.normalized;}给予一只鸟速度平均速度//if (alignmentForce.magnitude > 0) {//    this.GetComponent<Rigidbody>().velocity = alignmentForce;//}}
}