TianJin_23/Assets/Time of Day/Examples/TOD_ParticleAtNight.cs

using UnityEngine;

[RequireComponent(typeof(ParticleSystem))]
public class TOD_ParticleAtNight : MonoBehaviour
{
	public  float fadeTime = 1;
	private float lerpTime = 0;

	private ParticleSystem particleComponent;
	private float particleEmission;

	protected void Start()
	{
		particleComponent = GetComponent<ParticleSystem>();
		particleEmission  = particleComponent.emissionRate;

		particleComponent.emissionRate = TOD_Sky.Instance.IsNight ? particleEmission : 0;
	}

	protected void Update()
	{
		int sign = (TOD_Sky.Instance.IsNight) ? +1 : -1;
		lerpTime = Mathf.Clamp01(lerpTime + sign * Time.deltaTime / fadeTime);

		particleComponent.emissionRate = Mathf.Lerp(0, particleEmission, lerpTime);
	}
}