动态改变粒子系统的速度[Unity]

void LateUpdate ()

{

ParticleSystem.Particle[] particles = new ParticleSystem.Particle[particleSystem.particleCount];

int count = particleSystem.GetParticles(particles);

for(int i = 0; i < count; i++)

{

particles[i].velocity = new Vector3(0, speed, 0);

}

particleSystem.SetParticles(particles, count);

}