651 lines
20 KiB
C++
651 lines
20 KiB
C++
/*************************************************************************
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*
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* $RCSfile: hommatrixtemplate.hxx,v $
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*
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* $Revision: 1.9 $
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*
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* last change: $Author: thb $ $Date: 2003-11-10 15:10:41 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#ifndef _HOMMATRIX_TEMPLATE_HXX
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#define _HOMMATRIX_TEMPLATE_HXX
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#ifndef _SAL_TYPES_H_
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#include <sal/types.h>
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#endif
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#ifndef _BGFX_NUMERIC_FTOOLS_HXX
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#include <basegfx/numeric/ftools.hxx>
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#endif
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#include <math.h>
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#include <string.h>
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namespace basegfx
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{
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namespace internal
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{
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inline double implGetDefaultValue(sal_uInt16 nRow, sal_uInt16 nColumn)
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{
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if(nRow == nColumn)
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return 1.0;
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return 0.0;
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}
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template < int _RowSize > class ImplMatLine
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{
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enum { RowSize = _RowSize };
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double mfValue[RowSize];
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public:
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ImplMatLine(sal_uInt16 nRow = 0L, ImplMatLine< RowSize >* pToBeCopied = 0L)
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{
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if(pToBeCopied)
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{
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memcpy(&mfValue, pToBeCopied, sizeof(double) * RowSize);
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}
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else
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{
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for(sal_uInt16 a(0); a < RowSize; a++)
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{
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mfValue[a] = implGetDefaultValue(nRow, a);
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}
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}
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}
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double get(sal_uInt16 nColumn) const
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{
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return mfValue[nColumn];
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}
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void set(sal_uInt16 nColumn, const double& rValue)
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{
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mfValue[nColumn] = rValue;
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}
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};
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template < int _RowSize > class ImplHomMatrixTemplate
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{
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enum { RowSize = _RowSize };
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sal_uInt32 mnRefCount;
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ImplMatLine< RowSize > maLine[RowSize - 1];
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ImplMatLine< RowSize >* mpLine;
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public:
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// Is last line used?
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sal_Bool isLastLineDefault() const
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{
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if(!mpLine)
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return sal_True;
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for(sal_uInt16 a(0); a < RowSize; a++)
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{
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const double fDefault(implGetDefaultValue((RowSize - 1), a));
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const double fLineValue(mpLine->get(a));
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if(!::basegfx::numeric::fTools::equal(fDefault, fLineValue))
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{
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return sal_False;
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}
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}
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// reset last line, it equals default
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delete ((ImplHomMatrixTemplate< RowSize >*)this)->mpLine;
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((ImplHomMatrixTemplate< RowSize >*)this)->mpLine = 0L;
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return sal_True;
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}
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// This constructor is only used form the static identity matrix, thus
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// the RefCount is set to 1 to never 'delete' this static incarnation.
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ImplHomMatrixTemplate()
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: mnRefCount(1),
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mpLine(0L)
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{
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// complete initialization with identity matrix, all lines
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// were initialized with a trailing 1 followed by 0's.
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for(sal_uInt16 a(1); a < (RowSize - 1); a++)
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{
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maLine[a].set(0, 0.0);
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maLine[a].set(a, 1.0);
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}
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}
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ImplHomMatrixTemplate(const ImplHomMatrixTemplate& rToBeCopied)
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: mnRefCount(0),
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mpLine(0L)
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{
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// complete initialization using copy
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for(sal_uInt16 a(0); a < (RowSize - 1); a++)
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{
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memcpy(&maLine[a], &rToBeCopied.maLine[a], sizeof(ImplMatLine< RowSize >));
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}
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if(rToBeCopied.mpLine)
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{
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mpLine = new ImplMatLine< RowSize >((RowSize - 1), rToBeCopied.mpLine);
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}
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}
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~ImplHomMatrixTemplate()
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{
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if(mpLine)
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{
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delete mpLine;
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}
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}
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const sal_uInt32 getRefCount() const { return mnRefCount; }
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void incRefCount() { mnRefCount++; }
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void decRefCount() { mnRefCount--; }
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sal_uInt16 getEdgeLength() const { return RowSize; }
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double get(sal_uInt16 nRow, sal_uInt16 nColumn) const
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{
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if(nRow < (RowSize - 1))
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{
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return maLine[nRow].get(nColumn);
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}
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if(mpLine)
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{
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return mpLine->get(nColumn);
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}
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return implGetDefaultValue((RowSize - 1), nColumn);
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}
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void set(sal_uInt16 nRow, sal_uInt16 nColumn, const double& rValue)
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{
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if(nRow < (RowSize - 1))
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{
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maLine[nRow].set(nColumn, rValue);
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}
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else if(mpLine)
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{
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mpLine->set(nColumn, rValue);
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}
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else
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{
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const double fDefault(implGetDefaultValue((RowSize - 1), nColumn));
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if(!::basegfx::numeric::fTools::equal(fDefault, rValue))
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{
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mpLine = new ImplMatLine< RowSize >((RowSize - 1), 0L);
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mpLine->set(nColumn, rValue);
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}
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}
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}
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void testLastLine()
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{
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if(mpLine)
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{
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sal_Bool bNecessary(sal_False);
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for(sal_uInt16 a(0);!bNecessary && a < RowSize; a++)
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{
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const double fDefault(implGetDefaultValue((RowSize - 1), a));
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const double fLineValue(mpLine->get(a));
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if(!::basegfx::numeric::fTools::equal(fDefault, fLineValue))
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{
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bNecessary = sal_True;
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}
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}
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if(!bNecessary)
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{
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delete mpLine;
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mpLine = 0L;
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}
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}
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}
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// Left-upper decompositon
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sal_Bool ludcmp(sal_uInt16 nIndex[], sal_Int16& nParity)
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{
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double fBig, fSum, fDum;
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double fStorage[RowSize];
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sal_uInt16 a, b, c, nAMax;
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nParity = 1;
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// Calc the max of each line. If a line is empty,
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// stop immediately since matrix is not invertible then.
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for(a = 0; a < RowSize; a++)
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{
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fBig = 0.0;
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for(b = 0; b < RowSize; b++)
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{
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double fTemp(fabs(get(a, b)));
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if(::basegfx::numeric::fTools::more(fTemp, fBig))
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{
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fBig = fTemp;
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}
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}
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if(::basegfx::numeric::fTools::equalZero(fBig))
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{
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return sal_False;
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}
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fStorage[a] = 1.0 / fBig;
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}
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// start normalizing
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for(b = 0; b < RowSize; b++)
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{
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for(a = 0; a < b; a++)
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{
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fSum = get(a, b);
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for(c = 0; c < a; c++)
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{
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fSum -= get(a, c) * get(c, b);
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}
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set(a, b, fSum);
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}
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fBig = 0.0;
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for(a = b; a < RowSize; a++)
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{
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fSum = get(a, b);
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for(c = 0; c < b; c++)
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{
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fSum -= get(a, c) * get(c, b);
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}
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set(a, b, fSum);
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fDum = fStorage[a] * fabs(fSum);
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if(::basegfx::numeric::fTools::moreOrEqual(fDum, fBig))
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{
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fBig = fDum;
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nAMax = a;
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}
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}
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if(b != nAMax)
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{
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for(c = 0; c < RowSize; c++)
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{
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fDum = get(nAMax, c);
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set(nAMax, c, get(b, c));
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set(b, c, fDum);
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}
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nParity = -nParity;
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fStorage[nAMax] = fStorage[b];
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}
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nIndex[b] = nAMax;
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// here the failure of precision occurs
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const double fValBB(fabs(get(b, b)));
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if(::basegfx::numeric::fTools::equalZero(fValBB))
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{
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return sal_False;
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}
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if(b != (RowSize - 1))
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{
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fDum = 1.0 / get(b, b);
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for(a = b + 1; a < RowSize; a++)
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{
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set(a, b, get(a, b) * fDum);
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}
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}
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}
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return sal_True;
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}
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void lubksb(const sal_uInt16 nIndex[], double fRow[]) const
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{
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sal_uInt16 b, ip;
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sal_Int16 a, a2 = -1;
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double fSum;
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for(a = 0; a < RowSize; a++)
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{
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ip = nIndex[a];
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fSum = fRow[ip];
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fRow[ip] = fRow[a];
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if(a2 >= 0)
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{
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for(b = a2; b < a; b++)
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{
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fSum -= get(a, b) * fRow[b];
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}
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}
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else if(!::basegfx::numeric::fTools::equalZero(fSum))
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{
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a2 = a;
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}
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fRow[a] = fSum;
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}
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for(a = (RowSize - 1); a >= 0; a--)
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{
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fSum = fRow[a];
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for(b = a + 1; b < RowSize; b++)
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{
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fSum -= get(a, b) * fRow[b];
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}
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const double fValueAA(get(a, a));
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if(!::basegfx::numeric::fTools::equalZero(fValueAA))
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{
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fRow[a] = fSum / get(a, a);
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}
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}
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}
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sal_Bool isIdentity() const
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{
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// last line needs no testing if not existing
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const sal_uInt16 nMaxLine = (mpLine) ? RowSize : (RowSize - 1);
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for(sal_uInt16 a(0); a < nMaxLine; a++)
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{
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for(sal_uInt16 b(0); b < RowSize; b++)
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{
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const double fDefault(implGetDefaultValue(a, b));
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const double fValueAB(get(a, b));
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if(!::basegfx::numeric::fTools::equal(fDefault, fValueAB))
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{
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return sal_False;
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}
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}
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}
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return sal_True;
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}
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sal_Bool isInvertible() const
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{
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ImplHomMatrixTemplate aWork(*this);
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sal_uInt16 nIndex[RowSize];
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sal_Int16 nParity;
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return aWork.ludcmp(nIndex, nParity);
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}
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sal_Bool isNormalized() const
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{
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if(!mpLine)
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return sal_True;
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const double fHomValue(get((RowSize - 1), (RowSize - 1)));
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if(::basegfx::numeric::fTools::equalZero(fHomValue))
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{
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return sal_True;
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}
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const double fOne(1.0);
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if(::basegfx::numeric::fTools::equal(fOne, fHomValue))
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{
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return sal_True;
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}
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return sal_False;
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}
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void doInvert(const ImplHomMatrixTemplate& rWork, const sal_uInt16 nIndex[])
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{
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double fArray[RowSize];
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for(sal_uInt16 a(0); a < RowSize; a++)
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{
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// prepare line
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for(sal_uInt16 b(0); b < RowSize; b++)
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{
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fArray[b] = implGetDefaultValue(a, b);
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}
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// expand line
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rWork.lubksb(nIndex, fArray);
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// copy line transposed to this matrix
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for(b = 0; b < RowSize; b++)
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{
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set(b, a, fArray[b]);
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}
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}
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// evtl. get rid of last matrix line
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testLastLine();
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}
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void doNormalize()
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{
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if(mpLine)
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{
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const double fHomValue(get((RowSize - 1), (RowSize - 1)));
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for(sal_uInt16 a(0); a < RowSize; a++)
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{
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for(sal_uInt16 b(0); b < RowSize; b++)
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{
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set(a, b, get(a, b) / fHomValue);
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}
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}
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// evtl. get rid of last matrix line
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testLastLine();
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}
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}
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double doDeterminant() const
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{
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ImplHomMatrixTemplate aWork(*this);
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sal_uInt16 nIndex[RowSize];
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sal_Int16 nParity;
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double fRetval(0.0);
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if(aWork.ludcmp(nIndex, nParity))
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{
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fRetval = (double)nParity;
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// last line needs no multiply if not existing; default value would be 1.
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const sal_uInt16 nMaxLine = (aWork.mpLine) ? RowSize : (RowSize - 1);
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for(sal_uInt16 a(0); a < nMaxLine; a++)
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{
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fRetval *= aWork.get(a, a);
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}
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}
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return fRetval;
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}
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double doTrace() const
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{
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double fTrace = (mpLine) ? 0.0 : 1.0;
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const sal_uInt16 nMaxLine = (mpLine) ? RowSize : (RowSize - 1);
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for(sal_uInt16 a(0); a < nMaxLine; a++)
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{
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fTrace += get(a, a);
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}
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return fTrace;
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}
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void doTranspose()
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{
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for(sal_uInt16 a(0); a < (RowSize - 1); a++)
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{
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for(sal_uInt16 b(a + 1); b < RowSize; b++)
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{
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const double fTemp(get(a, b));
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set(a, b, get(b, a));
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set(b, a, fTemp);
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}
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}
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testLastLine();
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}
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void doAddMatrix(const ImplHomMatrixTemplate& rMat)
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{
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for(sal_uInt16 a(0); a < RowSize; a++)
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{
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for(sal_uInt16 b(0); b < RowSize; b++)
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{
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set(a, b, get(a, b) + rMat.get(a, b));
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}
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}
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testLastLine();
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}
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void doSubMatrix(const ImplHomMatrixTemplate& rMat)
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{
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for(sal_uInt16 a(0); a < RowSize; a++)
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{
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for(sal_uInt16 b(0); b < RowSize; b++)
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{
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set(a, b, get(a, b) - rMat.get(a, b));
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}
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}
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testLastLine();
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}
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void doMulMatrix(const double& rfValue)
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{
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for(sal_uInt16 a(0); a < RowSize; a++)
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{
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for(sal_uInt16 b(0); b < RowSize; b++)
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{
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set(a, b, get(a, b) * rfValue);
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}
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}
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testLastLine();
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}
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void doMulMatrix(const ImplHomMatrixTemplate& rMat)
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{
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// create a copy as source for the original values
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const ImplHomMatrixTemplate aCopy(*this);
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|
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// TODO: maybe optimize cases where last line is [0 0 1].
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double fValue(0.0);
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|
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for(sal_uInt16 a(0); a < RowSize; ++a)
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{
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for(sal_uInt16 b(0); b < RowSize; ++b)
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{
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fValue = 0.0;
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|
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for(sal_uInt16 c(0); c < RowSize; ++c)
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fValue += aCopy.get(c, b) * rMat.get(a, c);
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|
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set(a, b, fValue);
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}
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}
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|
|
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testLastLine();
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|
}
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|
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sal_Bool isEqual(const ImplHomMatrixTemplate& rMat)
|
|
{
|
|
const sal_uInt16 nMaxLine = (mpLine || rMat.mpLine) ? RowSize : (RowSize - 1);
|
|
|
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for(sal_uInt16 a(0); a < nMaxLine; a++)
|
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{
|
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for(sal_uInt16 b(0); b < RowSize; b++)
|
|
{
|
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const double fValueA(get(a, b));
|
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const double fValueB(rMat.get(a, b));
|
|
|
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if(!::basegfx::numeric::fTools::equal(fValueA, fValueB))
|
|
{
|
|
return sal_False;
|
|
}
|
|
}
|
|
}
|
|
|
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return sal_True;
|
|
}
|
|
};
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|
|
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} // namespace internal
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} // namespace basegfx
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#endif // _HOMMATRIX_TEMPLATE_HXX
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