also, remove hardcoded lack of activity/rotation.

particle system needs vorticity field, then does its own interpolation.

still a work in progress because the code will only work with the Euler
integration scheme for now.
we need to switch `enforce_unit_orientation` to work on the orientation
itself, and to call it in a different place in the code.

Ensure that the limit will not be included in the interval -- Add an assertion if a dead lock will appear

Sampled position is different from checkpoint position, I still need to
fix that.
However, there's another issue that needs to be solved first

Make it compile, but I would have prefer a class attribute instead of method to decompose template of field

switching to other computer

Berenger Bramas authored 8 years ago and Cristian Lalescu committed 8 years ago

Add a sampling method -- update to be generic against the field -- need to update NSVEparticles::do_stats