在unity做一个烟花，附代码

以下是一个简单的 Unity 烟花实现的示例代码：

using System.Collections;
using UnityEngine;

public class Firework : MonoBehaviour
{
    public GameObject fireworkParticlePrefab;
    public int maxParticles = 100;
    public float explosionForce = 10f;
    public float explosionRadius = 5f;
    public float explosionDuration = 2f;
    public float timeToExplode = 1f;

    private bool exploded = false;

    private void Update()
    {
        if (!exploded && Time.time >= timeToExplode)
        {
            Explode();
            exploded = true;
        }
    }

    private void Explode()
    {
        // Instantiate particle system
        GameObject fireworkParticle = Instantiate(fireworkParticlePrefab, transform.position, Quaternion.identity);

        // Get particles
        ParticleSystem particleSystem = fireworkParticle.GetComponent<ParticleSystem>();
        ParticleSystem.Particle[] particles = new ParticleSystem.Particle[maxParticles];

        // Emit particles
        int numParticles = particleSystem.GetParticles(particles);
        for (int i = 0; i < numParticles; i++)
        {
            particles[i].velocity = Random.onUnitSphere * explosionForce;
        }
        particleSystem.SetParticles(particles, numParticles);

        // Apply explosion force to nearby objects
        Collider[] colliders = Physics.OverlapSphere(transform.position, explosionRadius);
        foreach (Collider collider in colliders)
        {
            Rigidbody rb = collider.GetComponent<Rigidbody>();
            if (rb != null)
            {
                rb.AddExplosionForce(explosionForce, transform.position, explosionRadius);
            }
        }

        // Destroy particle system after duration
        Destroy(fireworkParticle, explosionDuration);
    }
}

这段代码创建了一个 `Firework` 脚本，用于在指定的时间点在场景中创建一个烟花效果。该脚本需要一个预制体，用于创建烟花粒子系统，以及一些参数，如最大粒子数、爆炸力度、爆炸半径、持续时间等。在 `Explode()` 方法中，该脚本实现了烟花效果的创建和爆炸力度的应用，以及随后的销毁粒子系统。在 `Update()` 方法中，该脚本检测是否到达指定的时间点，如果是，则执行 `Explode()` 方法来创建烟花效果。