ParticleSystem.MainModule.prewarm

Description

启用循环时，这可控制此粒子系统在首次变为可见时，是否看似已模拟了一个循环。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;
    public bool usePrewarm;

    void Start()
    {
        ps = GetComponent<ParticleSystem>();

        var main = ps.main;
        main.loop = true;   // prewarm only works on looping systems

        Restart();
    }

    void OnGUI()
    {
        bool newPrewarm = GUI.Toggle(new Rect(10, 60, 200, 30), usePrewarm, "Use Prewarm");

        if (newPrewarm != usePrewarm)
        {
            usePrewarm = newPrewarm;
            Restart();
        }
    }

    void Restart()
    {
        ps.Stop();
        ps.Clear();

        var main = ps.main;
        main.prewarm = usePrewarm;

        ps.Play();
    }
}