CMMotionRemover

class simtk.openmm.openmm.CMMotionRemover(*args)

This class prevents the center of mass of a System from drifting. At each time step, it calculates the center of mass momentum, then adjusts the individual particle velocities to make it zero.

__init__(self, frequency=1) → CMMotionRemover

__init__(self, other) -> CMMotionRemover Create a CMMotionRemover.

Methods

__init__(self[, frequency])	__init__(self, other) -> CMMotionRemover Create a CMMotionRemover.
getForceGroup(self)	Get the force group this Force belongs to.
getFrequency(self)	Get the frequency (in time steps) at which center of mass motion should be removed
setForceGroup(self, group)	Set the force group this Force belongs to.
setFrequency(self, freq)	Set the frequency (in time steps) at which center of mass motion should be removed
usesPeriodicBoundaryConditions(self)	Returns whether or not this force makes use of periodic boundary conditions.

Attributes

thisown

The membership flag

property thisown

The membership flag

getFrequency(self) → int

Get the frequency (in time steps) at which center of mass motion should be removed

setFrequency(self, freq)

Set the frequency (in time steps) at which center of mass motion should be removed

usesPeriodicBoundaryConditions(self) → bool

Returns whether or not this force makes use of periodic boundary conditions.

Returns

true if force uses PBC and false otherwise

Return type

bool

__copy__(self) → Force

getForceGroup(self) → int

Get the force group this Force belongs to.

setForceGroup(self, group)

Set the force group this Force belongs to.

Parameters

group (int) – the group index. Legal values are between 0 and 31 (inclusive).