Add an option to continue simulation from saved snapshot

[pdziekan]

Snapshots would be huge, though.

[trontrytel]

It would be awesome to have that. Do you think it would be much different than what you wrote for the piggybacker? We are reading in the velocities and scalars there anyhow?

[trontrytel]

Also, for the bulk schemes we wouldn't need to save that much? If you tell me how to start I could try adding that

[pdziekan]

Right, with bulk microphysics snapshots would not bo so large.

With bulk, all variables are stored as blitz arrays, so IO to file can be done the same way as for velocity fields in piggybacking.
You simply open a text file and use << for output and >> for input.

It would be much better to store snapshots in binary files (hdf5), but that would take some more effort.

How this could be implemented (from the top of my head, probably missing a lot of details):
Each snapshot should contain the following arrays:
u, v (only in 3D), w, th, rv, rc, rr
and simulation time.

When running from the snapshot, the arrays should be read after "intcond" method of the case class has been called. Also, timestep should be set to the one from the snapshot.

[trontrytel]

Thanks!. I'll work on it