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HarmonicAngleForce Class Reference

This class implements an interaction between groups of three particles that varies harmonically with the angle between them. More...

+ Inheritance diagram for HarmonicAngleForce:

Public Member Functions

def getNumAngles
 getNumAngles(HarmonicAngleForce self) -> int More...
 
def addAngle
 addAngle(HarmonicAngleForce self, int particle1, int particle2, int particle3, double angle, double k) -> int More...
 
def getAngleParameters
 getAngleParameters(HarmonicAngleForce self, int index) More...
 
def setAngleParameters
 setAngleParameters(HarmonicAngleForce self, int index, int particle1, int particle2, int particle3, double angle, double k) More...
 
def updateParametersInContext
 updateParametersInContext(HarmonicAngleForce self, Context context) More...
 
def __init__
 init(OpenMM::HarmonicAngleForce self) -> HarmonicAngleForce init(OpenMM::HarmonicAngleForce self, HarmonicAngleForce other) -> HarmonicAngleForce More...
 
def __del__
 del(OpenMM::HarmonicAngleForce self) More...
 
- Public Member Functions inherited from Force
def __init__
 
def __del__
 del(OpenMM::Force self) More...
 
def getForceGroup
 getForceGroup(Force self) -> int More...
 
def setForceGroup
 setForceGroup(Force self, int group) More...
 
def __copy__
 
def __deepcopy__
 

Public Attributes

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Detailed Description

This class implements an interaction between groups of three particles that varies harmonically with the angle between them.

To use it, create a HarmonicAngleForce object then call addAngle() once for each angle. After an angle has been added, you can modify its force field parameters by calling setAngleParameters(). This will have no effect on Contexts that already exist unless you call updateParametersInContext().

Constructor & Destructor Documentation

def __init__ (   self,
  args 
)

init(OpenMM::HarmonicAngleForce self) -> HarmonicAngleForce init(OpenMM::HarmonicAngleForce self, HarmonicAngleForce other) -> HarmonicAngleForce

Create a HarmonicAngleForce.

References simtk.openmm.openmm.stripUnits().

def __del__ (   self)

del(OpenMM::HarmonicAngleForce self)

References simtk.openmm.openmm.stripUnits().

Member Function Documentation

def addAngle (   self,
  args 
)

addAngle(HarmonicAngleForce self, int particle1, int particle2, int particle3, double angle, double k) -> int

Add an angle term to the force field.

Parameters
particle1the index of the first particle forming the angle
particle2the index of the second particle forming the angle
particle3the index of the third particle forming the angle
anglethe equilibrium angle, measured in radians
kthe harmonic force constant for the angle, measured in kJ/mol/radian^2

References simtk.openmm.openmm.stripUnits().

def getAngleParameters (   self,
  args 
)

getAngleParameters(HarmonicAngleForce self, int index)

Get the force field parameters for an angle term.

Parameters
indexthe index of the angle for which to get parameters
particle1the index of the first particle forming the angle
particle2the index of the second particle forming the angle
particle3the index of the third particle forming the angle
anglethe equilibrium angle, measured in radians
kthe harmonic force constant for the angle, measured in kJ/mol/radian^2

References simtk.openmm.openmm.stripUnits().

def getNumAngles (   self)

getNumAngles(HarmonicAngleForce self) -> int

Get the number of harmonic bond angle terms in the potential function

References simtk.openmm.openmm.stripUnits().

def setAngleParameters (   self,
  args 
)

setAngleParameters(HarmonicAngleForce self, int index, int particle1, int particle2, int particle3, double angle, double k)

Set the force field parameters for an angle term.

Parameters
indexthe index of the angle for which to set parameters
particle1the index of the first particle forming the angle
particle2the index of the second particle forming the angle
particle3the index of the third particle forming the angle
anglethe equilibrium angle, measured in radians
kthe harmonic force constant for the angle, measured in kJ/mol/radian^2

References simtk.openmm.openmm.stripUnits().

def updateParametersInContext (   self,
  args 
)

updateParametersInContext(HarmonicAngleForce self, Context context)

Update the per-angle parameters in a Context to match those stored in this Force object. This method provides an efficient method to update certain parameters in an existing Context without needing to reinitialize it. Simply call setAngleParameters() to modify this object's parameters, then call updateParametersInState() to copy them over to the Context.

The only information this method updates is the values of per-angle parameters. The set of particles involved in a angle cannot be changed, nor can new angles be added.

References simtk.openmm.openmm.stripUnits().

Member Data Documentation

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The documentation for this class was generated from the following file: