Bug / Crash Strange errors after import (clear project) and questions about perfomance

[josemendez]

Thanks for the answer.

I've tried switching to late update but this leads to worse visual results. 


In the intercollisions demo at lateupdate these physics artifacts are not noticeable, but I found a problem that physics consumes CPU even when the bodies are not moving/at rest.


Can these problems be solved somehow? or are there workarounds?

Hi,

Using LateUpdate is not always an ideal solution, as it causes cloth to be updated using a variable timestep. This is generally not noticeable for characters, fast moving clothing, or clothing that does not interact with other objects and can be regarded as a visual embellishment (as explained in the video). You should reduce Unity's max fixed timestep instead.

Also, please note that performance of Unity games running inside the editor is generally much worse than in a standalone build.

Solvers can stop updating the simulation when not visible. To do this, simply uncheck the "Simulate when invisible" option in ObiSolver. However, only entire solvers (not individual cloth pieces) can be culled. If you don't plan on having cloth pieces collide with each other, this is not an issue as you can use a separate solver for each cloth.

Resting cloth pieces still have to be updated. You could deactivate the cloth when its kinetic energy gets below a threshold (get particle velocities and calculate their weighted mean), then reactivate it when the user interacts with it, or when any other condition is met.