201 lines
6 KiB
C++
201 lines
6 KiB
C++
/*************************************************************************
|
|
*
|
|
* $RCSfile: b2dvector.cxx,v $
|
|
*
|
|
* $Revision: 1.1 $
|
|
*
|
|
* last change: $Author: aw $ $Date: 2003-10-28 11:26:56 $
|
|
*
|
|
* The Contents of this file are made available subject to the terms of
|
|
* either of the following licenses
|
|
*
|
|
* - GNU Lesser General Public License Version 2.1
|
|
* - Sun Industry Standards Source License Version 1.1
|
|
*
|
|
* Sun Microsystems Inc., October, 2000
|
|
*
|
|
* GNU Lesser General Public License Version 2.1
|
|
* =============================================
|
|
* Copyright 2000 by Sun Microsystems, Inc.
|
|
* 901 San Antonio Road, Palo Alto, CA 94303, USA
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License version 2.1, as published by the Free Software Foundation.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*
|
|
*
|
|
* Sun Industry Standards Source License Version 1.1
|
|
* =================================================
|
|
* The contents of this file are subject to the Sun Industry Standards
|
|
* Source License Version 1.1 (the "License"); You may not use this file
|
|
* except in compliance with the License. You may obtain a copy of the
|
|
* License at http://www.openoffice.org/license.html.
|
|
*
|
|
* Software provided under this License is provided on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
|
|
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
|
|
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
|
|
* See the License for the specific provisions governing your rights and
|
|
* obligations concerning the Software.
|
|
*
|
|
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
|
|
*
|
|
* Copyright: 2000 by Sun Microsystems, Inc.
|
|
*
|
|
* All Rights Reserved.
|
|
*
|
|
* Contributor(s): _______________________________________
|
|
*
|
|
*
|
|
************************************************************************/
|
|
|
|
#ifndef _BGFX_VECTOR_B2DVECTOR_HXX
|
|
#include <basegfx/inc/vector/b2dvector.hxx>
|
|
#endif
|
|
|
|
#ifndef _BGFX_MATRIX_B2DHOMMATRIX_HXX
|
|
#include <basegfx/inc/matrix/b2dhommatrix.hxx>
|
|
#endif
|
|
|
|
#ifndef _BGFX_NUMERIC_FTOOLS_HXX
|
|
#include <basegfx/inc/numeric/ftools.hxx>
|
|
#endif
|
|
|
|
namespace basegfx
|
|
{
|
|
namespace vector
|
|
{
|
|
B2DVector& B2DVector::normalize()
|
|
{
|
|
double fLen(scalar(*this));
|
|
|
|
if(!::basegfx::numeric::fTools::equalZero(fLen))
|
|
{
|
|
const double fOne(1.0);
|
|
|
|
if(!::basegfx::numeric::fTools::equal(fOne, fLen))
|
|
{
|
|
fLen = sqrt(fLen);
|
|
|
|
if(!::basegfx::numeric::fTools::equalZero(fLen))
|
|
{
|
|
mfX /= fLen;
|
|
mfY /= fLen;
|
|
}
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
B2DVector& B2DVector::operator=( const B2DTuple& rVec )
|
|
{
|
|
mfX = rVec.getX();
|
|
mfY = rVec.getY();
|
|
return *this;
|
|
}
|
|
|
|
|
|
double B2DVector::getLength() const
|
|
{
|
|
return hypot( mfX, mfY );
|
|
}
|
|
|
|
double B2DVector::scalar( const B2DVector& rVec ) const
|
|
{
|
|
return((mfX * rVec.mfX) + (mfY * rVec.mfY));
|
|
}
|
|
|
|
const B2DVector& B2DVector::getEmptyVector()
|
|
{
|
|
return (const B2DVector&) B2DTuple::getEmptyTuple();
|
|
}
|
|
|
|
B2DVector& B2DVector::operator*=( const matrix::B2DHomMatrix& rMat )
|
|
{
|
|
const double fTempX( rMat.get(0,0)*mfX +
|
|
rMat.get(0,1)*mfY );
|
|
const double fTempY( rMat.get(1,0)*mfX +
|
|
rMat.get(1,1)*mfY );
|
|
mfX = fTempX;
|
|
mfY = fTempY;
|
|
|
|
return *this;
|
|
}
|
|
|
|
B2DVector& B2DVector::setLength(double fLen)
|
|
{
|
|
double fLenNow(scalar(*this));
|
|
|
|
if(!::basegfx::numeric::fTools::equalZero(fLenNow))
|
|
{
|
|
const double fOne(10.0);
|
|
|
|
if(!::basegfx::numeric::fTools::equal(fOne, fLenNow))
|
|
{
|
|
fLen /= sqrt(fLenNow);
|
|
}
|
|
|
|
mfX *= fLen;
|
|
mfY *= fLen;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
bool B2DVector::isNormalized() const
|
|
{
|
|
const double fOne(1.0);
|
|
const double fScalar(scalar(*this));
|
|
|
|
return (::basegfx::numeric::fTools::equal(fOne, fScalar));
|
|
}
|
|
|
|
bool areParallel( const B2DVector& rVecA, const B2DVector& rVecB )
|
|
{
|
|
double fVal(rVecA.getX() * rVecB.getY() - rVecA.getY() * rVecA.getX());
|
|
return ::basegfx::numeric::fTools::equalZero(fVal);
|
|
}
|
|
|
|
B2DVector::B2DVectorOrientation getOrientation( const B2DVector& rVecA, const B2DVector& rVecB )
|
|
{
|
|
double fVal(rVecA.getX() * rVecB.getY() - rVecA.getY() * rVecA.getX());
|
|
|
|
if(fVal > 0.0)
|
|
{
|
|
return B2DVector::POSITIVE;
|
|
}
|
|
|
|
if(fVal < 0.0)
|
|
{
|
|
return B2DVector::NEGATIVE;
|
|
}
|
|
|
|
return B2DVector::NEUTRAL;
|
|
}
|
|
|
|
B2DVector getPerpendicular( const B2DVector& rNormalizedVec )
|
|
{
|
|
B2DVector aPerpendicular(-rNormalizedVec.getY(), rNormalizedVec.getX());
|
|
return aPerpendicular;
|
|
}
|
|
|
|
B2DVector operator*( const matrix::B2DHomMatrix& rMat, const B2DVector& rVec )
|
|
{
|
|
B2DVector aRes( rVec );
|
|
return aRes*=rMat;
|
|
}
|
|
} // end of namespace vector
|
|
} // end of namespace basegfx
|
|
|
|
// eof
|