Unity粒子2d不会旋转

Question

我试图让粒子以与子弹瞄准的角度相反的角度出来，但是……不，它们总是以相同的角度出来，谁能解释为什么？

  if (collision.gameObject.tag == "Wall")
    {
        float trialboo = this.transform.rotation.z;
        GameObject richochet = Instantiate(ricochetParticles, particleSpawnPoint.position, Quaternion.Euler(0f, 0f, 0f));
        ParticleSystem richochetps = richochet.GetComponent<ParticleSystem>();

      var shape = richochetps.shape;
        var rotationpower = this.transform.rotation.z- 45;
       shape.rotation = new Vector3(0f, 0f, rotationpower);
        richochetps.Play(); shape.rotation = new Vector3(0f, 0f, rotationpower);
        print("winning");
        // Destroy(collision.gameObject);
    }
    Destroy(this.gameObject);
}

}

Answer 1

简单方法：将particle放置为empty object的子粒子，然后旋转父粒子。