SbbIntegerBranchingObject Class Reference

#include <SbbBranchActual.hpp>

Inheritance diagram for SbbIntegerBranchingObject:

List of all members.

Public Member Functions
	SbbIntegerBranchingObject ()
	Default constructor.
	SbbIntegerBranchingObject (SbbModel *model, int variable, int way, double value)
	SbbIntegerBranchingObject (SbbModel *model, int variable, int way, double lowerValue, double upperValue)
	SbbIntegerBranchingObject (const SbbIntegerBranchingObject &)
	Copy constructor.
SbbIntegerBranchingObject &	operator= (const SbbIntegerBranchingObject &rhs)
	Assignment operator.
virtual SbbBranchingObject *	clone () const
	Clone.
virtual	~SbbIntegerBranchingObject ()
	Destructor.
virtual void	branch ()
	Sets the bounds for the variable according to the current arm of the branch and advances the object state to the next arm.
Private Attributes
double	down_ [2]
	Lower [0] and upper [1] bounds for the down arm (way_ = -1).
double	up_ [2]
	Lower [0] and upper [1] bounds for the up arm (way_ = 1).

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Detailed Description

Simple branching object for an integer variable

This object can specify a two-way branch on an integer variable. For each arm of the branch, the upper and lower bounds on the variable can be independently specified.

Variable_ holds the index of the integer variable in the integerVariable_ array of the model.

Definition at line 196 of file SbbBranchActual.hpp.

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Constructor & Destructor Documentation

SbbIntegerBranchingObject::SbbIntegerBranchingObject (  SbbModel *  model, int  variable, int  way, double  value )

Create a standard floor/ceiling branch object Specifies a simple two-way branch. Let value = x*. One arm of the branch will be is lb <= x <= floor(x*), the other ceil(x*) <= x <= ub. Specify way = -1 to set the object state to perform the down arm first, way = 1 for the up arm. Definition at line 522 of file SbbBranchActual.cpp. References down_, OsiSolverInterface::getColLower(), SbbModel::getColUpper(), SbbModel::integerVariable(), SbbModel::solver(), and up_. :SbbBranchingObject(model,variable,way,value) { int iColumn = model_->integerVariable()[variable_]; down_[0] = model_->solver()->getColLower()[iColumn]; down_[1] = floor(value_); up_[0] = ceil(value_); up_[1] = model->getColUpper()[iColumn]; }

SbbIntegerBranchingObject::SbbIntegerBranchingObject (  SbbModel *  model, int  variable, int  way, double  lowerValue, double  upperValue )

Create a degenerate branch object Specifies a `one-way branch'. Calling branch() for this object will always result in lowerValue <= x <= upperValue. Used to fix a variable when lowerValue = upperValue. Definition at line 533 of file SbbBranchActual.cpp. References down_, and up_. :SbbBranchingObject(model,variable,way,lowerValue) { numberBranchesLeft_=1; down_[0] = lowerValue; down_[1] = upperValue; up_[0] = lowerValue; up_[1] = upperValue; }

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

• SbbBranchActual.hpp
• SbbBranchActual.cpp

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