Snapshot Modifiers

SnapshotModifier([subset_mask])	Abstract class for snapshot modification.
NoModification([as_copy])	Modifier with no change: "

RandomVelocities([beta, engine, subset_mask])

Randomize velocities according to the Boltzmann distribution.

GeneralizedDirectionModifier(delta_v[, ...])	Snapshot modifier which changes velocity direction with constant energy.
VelocityDirectionModifier(delta_v[, ...])	Randomly change all the velocities (in the subset masked, at least) according to the given delta_v.
SingleAtomVelocityDirectionModifier(delta_v)	Change a single atom according to the delta_v.