Rigid body dynamic (RBD) precision and subframe sampling

About precision and subframe sampling for rigid body dynamics…here’s my understanding of how these two are related. Note that nobody confirmed this when I asked around, but then again nobody gainsaid it either 😉

The precision determines how frequently the simulation is calculated. For example, if Precision=120, then there is at most 1/120 of a second between calculations.

The subframe sampling determines the number of samples per frame.

So, if you are have this:

  • 30 fps
  • Precision = 120 per second
  • Subframe sampling =2 per frame

Then the RBD simulation is updated/calculated 4 times per frame (120/30), and ICE takes 2 samples of those calculated values per frame.