帧可以在粒子更新上耗用的最长时间。如果帧耗用的时间超过该值,则将更新拆分为多个较小的更新。
使用该函数可在粒子模拟的准确性与性能目标之间取得平衡。
使用较小的值可提供更高品质的粒子模拟,但需要耗用更多的处理时间。如果帧时间超过提供的阈值,粒子更新将以较小的时间增量运行多次。
相反,较大的值将确保粒子模拟不会分解为每帧多个步骤,从而提供最佳性能,但在使用某些更高级的粒子模拟功能时会丢失模拟精度。
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