mirror of https://github.com/CGAL/cgal
115 lines
2.8 KiB
C++
115 lines
2.8 KiB
C++
// ============================================================================
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//
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// Copyright (c) 1997-2003 The CGAL Consortium
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//
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// This software and related documentation is part of an INTERNAL release
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// of the Computational Geometry Algorithms Library (CGAL). It is not
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// intended for general use.
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//
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// ----------------------------------------------------------------------------
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//
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// release : $CGAL_Revision: CGAL-I $
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// release_date : $CGAL_Date$
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//
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// file : include/CGAL/QP_engine/QPE_full_exact_pricing.h
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// package : $CGAL_Package: QP_engine $
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// chapter : Quadratic Programming Engine
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//
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// revision : 3.0alpha
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// revision_date : 2003/08
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//
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// author(s) : Sven Schönherr <sven@inf.fu-berlin.de>
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// coordinator : ETH Zürich (Bernd Gärtner <gaertner@inf.ethz.ch>)
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//
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// implementation: Pricing Strategy with full exact pricing
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// ============================================================================
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#ifndef CGAL_QPE_FULL_EXACT_PRICING_H
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#define CGAL_QPE_FULL_EXACT_PRICING_H
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// includes
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#include <CGAL/QP_engine/QPE_pricing_strategy.h>
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CGAL_BEGIN_NAMESPACE
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// =================
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// class declaration
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// =================
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template < class Rep_ >
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class QPE_full_exact_pricing;
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// ===============
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// class interface
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// ===============
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template < class Rep_ >
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class QPE_full_exact_pricing : public QPE_pricing_strategy<Rep_> {
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// self
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typedef Rep_ Rep;
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typedef QPE_pricing_strategy<Rep> Base;
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typedef QPE_full_exact_pricing<Rep> Self;
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// types from the base class
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typedef typename Base::ET ET;
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public:
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// creation
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QPE_full_exact_pricing( );
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// operations
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int pricing( );
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};
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// ----------------------------------------------------------------------------
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// =============================
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// class implementation (inline)
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// =============================
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// construction
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template < class Rep_ > inline
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QPE_full_exact_pricing<Rep_>::
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QPE_full_exact_pricing( )
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: QPE_pricing_strategy<Rep_>( "full exact")
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{ }
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// operations
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template < class Rep_ >
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int QPE_full_exact_pricing<Rep_>::
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pricing( )
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{
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// get properties of quadratic program
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int w = solver().number_of_working_variables();
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// loop over all non-basic variables
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int j, min_j = -1;
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ET mu, min_mu = et0;
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for ( j = 0; j < w; ++j) {
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// variable non-basic?
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if ( ! solver().is_basic( j)) {
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// compute mu_j
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mu = mu_j( j);
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CGAL_qpe_debug {
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vout() << "mu_" << j << ": " << mu << std::endl;
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}
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// new minimum?
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if ( mu < min_mu) { min_j = j; min_mu = mu; }
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}
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}
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vout() << std::endl;
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// return index of entering variable
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return min_j;
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}
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CGAL_END_NAMESPACE
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#endif // CGAL_QPE_FULL_EXACT_PRICING_H
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// ===== EOF ==================================================================
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