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IMP Reference Guide  2.13.0
The Integrative Modeling Platform
IMP::core::Cosine Class Reference

Cosine function. More...

#include <IMP/core/Cosine.h>

+ Inheritance diagram for IMP::core::Cosine:

Detailed Description

Cosine function.

This evaluates the function |k| - k cos(nf + a) where k is a force constant, n the periodicity, a the phase, and f the input value. This is most commonly used for dihedral angle restraints, e.g. in the CHARMM force field.

Definition at line 22 of file Cosine.h.

Public Member Functions

 Cosine (Float force_constant, int periodicity, Float phase)
 Constructor. More...
 
void do_show (std::ostream &out) const
 
virtual double evaluate (double feature) const
 Calculate score with respect to the given feature. More...
 
virtual DerivativePair evaluate_with_derivative (double feature) const
 Calculate score and derivative with respect to the given feature. More...
 
virtual std::string get_type_name () const
 
virtual ::IMP::VersionInfo get_version_info () const
 Get information about the module and version of the object. More...
 
- Public Member Functions inherited from IMP::UnaryFunction
 UnaryFunction (std::string name="UnaryFunction%1%")
 
- Public Member Functions inherited from IMP::Object
virtual void clear_caches ()
 
CheckLevel get_check_level () const
 
LogLevel get_log_level () const
 
void set_check_level (CheckLevel l)
 
void set_log_level (LogLevel l)
 Set the logging level used in this object. More...
 
void set_was_used (bool tf) const
 
void show (std::ostream &out=std::cout) const
 
const std::string & get_name () const
 
void set_name (std::string name)
 

Additional Inherited Members

- Protected Member Functions inherited from IMP::Object
 Object (std::string name)
 Construct an object with the given name. More...
 
virtual void do_destroy ()
 

Constructor & Destructor Documentation

IMP::core::Cosine::Cosine ( Float  force_constant,
int  periodicity,
Float  phase 
)

Constructor.

Parameters
[in]force_constantForce constant (score units)
[in]periodicityPeriodicity (generally 1-6)
[in]phasePhase (radians)

Definition at line 29 of file Cosine.h.

Member Function Documentation

virtual double IMP::core::Cosine::evaluate ( double  feature) const
virtual

Calculate score with respect to the given feature.

Parameters
[in]featureValue of feature being tested.
Returns
Score

Reimplemented from IMP::UnaryFunction.

virtual DerivativePair IMP::core::Cosine::evaluate_with_derivative ( double  feature) const
virtual

Calculate score and derivative with respect to the given feature.

Parameters
[in]featureValue of feature being tested.
Returns
a DerivativePair containing the score and its partial derivative with respect to the given feature.

Reimplemented from IMP::UnaryFunction.

virtual ::IMP::VersionInfo IMP::core::Cosine::get_version_info ( ) const
virtual

Get information about the module and version of the object.

Reimplemented from IMP::Object.

Definition at line 38 of file Cosine.h.


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