Detailed Description

Ensure that a set of particles remains connected with one another.

The restraint implements ambiguous connectivity. That is, it takes several particles and ensures that they remain connected, but allows how they are connected to change. If you wish to restrain the connectivity of sets of particles (e.g. each protein is represented using a set of balls) use an appropriate PairScore which calls a Refiner (such as ClosePairsPairScore).

 ## \example core/connectivity_restraint.py
 # This example shows how to use the ConnectivityRestraint to ensure that
 # all the particles end up in a connected conformation following the
 # optimization. One should also check out the
 # IMP::atom::create_connectivity_restraint() helper functions.
 
 import IMP
 import IMP.core
 import IMP.container
 import IMP.algebra
 import IMP.atom
 import sys
 
 IMP.setup_from_argv(sys.argv, "Connectivity restraint")
 
 m = IMP.Model()
 
 # Put the parent particles for each molecule
 hs = []
 
 # create the molecules, with 5 particles for each of 10 molecules
 for i in range(0, 10):
     pr = IMP.Particle(m)
     pr.set_name("root " + str(i))
     d = IMP.atom.Hierarchy.setup_particle(pr)
     for j in range(0, 5):
         p = IMP.Particle(m)
         p.set_name("fragment " + str(i) + " " + str(j))
         cd = IMP.atom.Fragment.setup_particle(p)
         d.add_child(cd)
         xd = IMP.core.XYZR.setup_particle(
             p, IMP.algebra.Sphere3D(IMP.algebra.Vector3D(3 * i, j, 0), 1))
     hs.append(pr)
 
 
 ps = IMP.core.SphereDistancePairScore(IMP.core.HarmonicUpperBound(0, 1))
 cps = IMP.core.ChildrenRefiner(IMP.atom.Hierarchy.get_traits())
 
 # score based on the one closest particle from each set of balls
 lrps = IMP.core.KClosePairsPairScore(ps, cps, 1)
 # connect all 10 molecules together
 lsc = IMP.container.ListSingletonContainer(m, hs)
 cr = IMP.core.ConnectivityRestraint(lrps, lsc)
 
 cr.evaluate(False)

More precisely, the restraint scores by computing the minimum spanning tree on the complete graph connecting all the particles. The edge weights are given by the value of the PairScore for the two endpoints of the edge.

Definition at line 39 of file ConnectivityRestraint.h.

Public Member Functions
	ConnectivityRestraint (PairScore *ps, SingletonContainerAdaptor sc)
	Use the given PairScore. More...

Restraints	do_create_current_decomposition () const

IMP::ModelObjectsTemp	do_get_inputs () const

ParticleIndexPairs	get_connected_index_pairs () const
	Return the set of pairs which are connected by the restraint. More...

PairScore *	get_pair_score () const
	Return the pair score used for scoring. 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...

double	unprotected_evaluate (IMP::DerivativeAccumulator *accum) const

Public Member Functions inherited from IMP::Restraint
	Restraint (Model *m, std::string name)

void	add_score_and_derivatives (ScoreAccumulator sa) const
	Perform the actual restraint scoring. More...

void	add_score_and_derivatives_moved (ScoreAccumulator sa, const ParticleIndexes &moved_pis, const ParticleIndexes &reset_pis) const

Restraint *	create_current_decomposition () const
	Decompose this restraint into constituent terms for the current conf. More...

Restraint *	create_decomposition () const
	Decompose this restraint into constituent terms. More...

virtual ScoringFunction *	create_scoring_function (double weight=1.0, double max=NO_MAX) const
	Create a scoring function with only this restraint. More...

virtual RestraintInfo *	get_dynamic_info () const

virtual double	get_last_last_score () const
	Get the unweighted score from the last-but-one time it was evaluated. More...

virtual double	get_last_score () const

double	get_score () const

virtual RestraintInfo *	get_static_info () const

bool	get_was_good () const

void	set_weight (Float weight)

Float	get_weight () const

double	get_maximum_score () const

void	set_maximum_score (double s)

Public Member Functions inherited from IMP::ModelObject
	ModelObject (Model *m, std::string name)

bool	get_has_dependencies () const
	Return whether this object has dependencies computed. More...

bool	get_has_required_score_states () const
	Return whether score states are computed. More...

ModelObjectsTemp	get_inputs () const

ModelObjectsTemps	get_interactions () const
	Get the interacting sets induced by this ModelObject. More...

Model *	get_model () const

ModelObjectsTemp	get_outputs () const

const ScoreStatesTemp &	get_required_score_states () const
	Get the score states that are ancestors of this in the dependency graph. More...

void	set_has_dependencies (bool tf)
	Either invalidate the dependencies or ensure they are correct. More...

void	set_has_required_score_states (bool tf)
	Compute the required score states. More...

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::Restraint
virtual void	do_add_score_and_derivatives (ScoreAccumulator sa) const

virtual void	do_add_score_and_derivatives_moved (ScoreAccumulator sa, const ParticleIndexes &moved_pis, const ParticleIndexes &reset_pis) const

virtual Restraints	do_create_decomposition () const

ModelObjectsTemp	do_get_outputs () const

Protected Member Functions inherited from IMP::ModelObject
virtual ModelObjectsTemps	do_get_interactions () const

virtual void	handle_set_has_required_score_states (bool)

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::ConnectivityRestraint::ConnectivityRestraint	(	PairScore *	ps,
		SingletonContainerAdaptor	sc
	)

Use the given PairScore.

Member Function Documentation

Restraints IMP::core::ConnectivityRestraint::do_create_current_decomposition ( ) const

virtual

A Restraint should override this if it wants to decompose itself for display and other purposes. The returned restraints will be made into a RestraintSet if needed, with suitable weight and maximum score.

The returned restraints should be only the non-zero terms and should have their last scores set appropriately.

Reimplemented from IMP::Restraint.

IMP::ModelObjectsTemp IMP::core::ConnectivityRestraint::do_get_inputs ( ) const

virtual

Get any Particle, Container or other ModelObjects read by this during evaluation. If you read everything in a container, you can just return that container.

Implements IMP::ModelObject.

ParticleIndexPairs IMP::core::ConnectivityRestraint::get_connected_index_pairs ( ) const

Return the set of pairs which are connected by the restraint.

This set of pairs reflects the current configuration at the time of the get_connected_pairs() call, not the set at the time of the last evaluate() call.

PairScore* IMP::core::ConnectivityRestraint::get_pair_score ( ) const

Return the pair score used for scoring.

Definition at line 55 of file ConnectivityRestraint.h.

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

virtual

Get information about the module and version of the object.

Reimplemented from IMP::Object.

Definition at line 63 of file ConnectivityRestraint.h.

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

ConnectivityRestraint.h

Detailed Description

Public Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation