constrain¶
Constraint force classes apply forces and the resulting virial to particles that enforce specific constraints on the positions of the particles. The constraint is satisfied at all times, so there is no potential energy associated with the constraint.
Each constraint removes a number of degrees of freedom from the system.
hoomd.md.compute.ThermodynamicQuantities accounts for these lost degrees of
freedom when computing kinetic temperature and pressure. See
hoomd.State.update_group_dof for details on when the degrees of freedom for a
group are calculated.
Warning
Do not apply multiple constraint class instances to the same particle. Each instance solves for its constraints independently.
Classes