控制粒子系统是否使用自动生成的随机数作为随机数生成器的种子。
如果设置为 true,粒子系统将在每次播放时生成一个新的随机种子。如果设置为 false,则改为使用 ParticleSystem.randomSeed - 允许使用常量种子(如果您希望粒子每次都以完全相同的方式播放,这非常有用)或用户定义的随机值(例如,您可以循环使用一个种子数组)。
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