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72 lines
2.5 KiB
72 lines
2.5 KiB
/*
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**************************************************************************
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description
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--------------------
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copyright : (C) 2002 by Andreas Zehender
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email : zehender@kde.org
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**************************************************************************
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**************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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**************************************************************************/
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#include "pmpolynomexponents.h"
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#include "pmdebug.h"
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bool PMPolynomExponents::m_created[6] = { false, false, false,
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false, false, false };
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TQValueList<PMPolynomExponents> PMPolynomExponents::m_lists[6];
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PMPolynomExponents operator+ ( const PMPolynomExponents& p1,
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const PMPolynomExponents& p2 )
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{
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return PMPolynomExponents( p1.m_exponents[0] + p2.m_exponents[0],
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p1.m_exponents[1] + p2.m_exponents[1],
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p1.m_exponents[2] + p2.m_exponents[2] );
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}
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TQValueList<PMPolynomExponents>& PMPolynomExponents::polynom( int n )
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{
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if( ( n < 2 ) || ( n > 7 ) )
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{
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n = 2;
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kdError( PMArea ) << "Wrong polynom order in PMPolynomExponents::polynom( )\n";
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}
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if( !m_created[n-2] )
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{
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m_lists[n-2] = recPolynom( PMPolynomExponents( 0, 0, 0 ), 0, n, 0 );
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m_created[n-2] = true;
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// kdDebug( PMArea ) << "Polynom n: " << n << " size: " << m_lists[n-2].count( ) << endl;
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}
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return m_lists[n-2];
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}
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TQValueList<PMPolynomExponents>
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PMPolynomExponents::recPolynom( const PMPolynomExponents& base,
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int xyz, int n, int rem )
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{
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TQValueList<PMPolynomExponents> res;
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if( n >= 0 )
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{
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if( ( ( rem + n ) == 0 ) || ( xyz > 2 ) )
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res.append( base );
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else
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{
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PMPolynomExponents newBase = base;
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newBase.setExponent( xyz, n );
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res += recPolynom( newBase, xyz + 1, rem, 0 );
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res += recPolynom( base, xyz, n - 1, rem + 1 );
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}
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}
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return res;
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}
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