b3dpoint.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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#include <basegfx/point/b3dpoint.hxx>
#include <basegfx/matrix/b3dhommatrix.hxx>
#include <basegfx/numeric/ftools.hxx>
 
namespace basegfx
{
    B3DPoint& B3DPoint::operator*=( const ::basegfx::B3DHomMatrix& rMat )
    {
        double fTempX(
            rMat.get(0, 0) * mfX +
            rMat.get(0, 1) * mfY +
            rMat.get(0, 2) * mfZ +
            rMat.get(0, 3));
        double fTempY(
            rMat.get(1, 0) * mfX +
            rMat.get(1, 1) * mfY +
            rMat.get(1, 2) * mfZ +
            rMat.get(1, 3));
        double fTempZ(
            rMat.get(2, 0) * mfX +
            rMat.get(2, 1) * mfY +
            rMat.get(2, 2) * mfZ +
            rMat.get(2, 3));
 
        if(!rMat.isLastLineDefault())
        {
            const double fOne(1.0);
            const double fTempM(
                rMat.get(3, 0) * mfX +
                rMat.get(3, 1) * mfY +
                rMat.get(3, 2) * mfZ +
                rMat.get(3, 3));
 
            if(!fTools::equalZero(fTempM) && !fTools::equal(fOne, fTempM))
            {
                fTempX /= fTempM;
                fTempY /= fTempM;
                fTempZ /= fTempM;
            }
        }
 
        mfX = fTempX;
        mfY = fTempY;
        mfZ = fTempZ;
 
        return *this;
    }
 
    B3DPoint operator*( const ::basegfx::B3DHomMatrix& rMat, const B3DPoint& rPoint )
    {
        B3DPoint aRes( rPoint );
        aRes *= rMat;
        return aRes;
    }
} // end of namespace basegfx
 
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