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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: b2ivector.cxx,v $
* $Revision: 1.7 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basegfx.hxx"
#include <basegfx/vector/b2ivector.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/numeric/ftools.hxx>
namespace basegfx
{
B2IVector& B2IVector::operator=( const ::basegfx::B2ITuple& rVec )
{
mnX = rVec.getX();
mnY = rVec.getY();
return *this;
}
double B2IVector::getLength() const
{
return hypot( mnX, mnY );
}
double B2IVector::scalar( const B2IVector& rVec ) const
{
return((mnX * rVec.mnX) + (mnY * rVec.mnY));
}
double B2IVector::cross( const B2IVector& rVec ) const
{
return(mnX * rVec.getY() - mnY * rVec.getX());
}
double B2IVector::angle( const B2IVector& rVec ) const
{
return atan2(double( mnX * rVec.getY() - mnY * rVec.getX()),
double( mnX * rVec.getX() + mnY * rVec.getY()));
}
const B2IVector& B2IVector::getEmptyVector()
{
return (const B2IVector&) ::basegfx::B2ITuple::getEmptyTuple();
}
B2IVector& B2IVector::operator*=( const B2DHomMatrix& rMat )
{
mnX = fround( rMat.get(0,0)*mnX +
rMat.get(0,1)*mnY );
mnY = fround( rMat.get(1,0)*mnX +
rMat.get(1,1)*mnY );
return *this;
}
B2IVector& B2IVector::setLength(double fLen)
{
double fLenNow(scalar(*this));
if(!::basegfx::fTools::equalZero(fLenNow))
{
const double fOne(10.0);
if(!::basegfx::fTools::equal(fOne, fLenNow))
{
fLen /= sqrt(fLenNow);
}
mnX = fround( mnX*fLen );
mnY = fround( mnY*fLen );
}
return *this;
}
bool areParallel( const B2IVector& rVecA, const B2IVector& rVecB )
{
double fVal(rVecA.getX() * rVecB.getY() - rVecA.getY() * rVecB.getX());
return ::basegfx::fTools::equalZero(fVal);
}
B2VectorOrientation getOrientation( const B2IVector& rVecA, const B2IVector& rVecB )
{
double fVal(rVecA.getX() * rVecB.getY() - rVecA.getY() * rVecB.getX());
if(fVal > 0.0)
{
return ORIENTATION_POSITIVE;
}
if(fVal < 0.0)
{
return ORIENTATION_NEGATIVE;
}
return ORIENTATION_NEUTRAL;
}
B2IVector getPerpendicular( const B2IVector& rNormalizedVec )
{
B2IVector aPerpendicular(-rNormalizedVec.getY(), rNormalizedVec.getX());
return aPerpendicular;
}
B2IVector operator*( const B2DHomMatrix& rMat, const B2IVector& rVec )
{
B2IVector aRes( rVec );
return aRes*=rMat;
}
B2VectorContinuity getContinuity(const B2IVector& rBackVector, const B2IVector& rForwardVector )
{
B2VectorContinuity eRetval(CONTINUITY_NONE);
if(!rBackVector.equalZero() && !rForwardVector.equalZero())
{
const B2IVector aInverseForwardVector(-rForwardVector.getX(), -rForwardVector.getY());
if(rBackVector == aInverseForwardVector)
{
// same direction and same length -> C2
eRetval = CONTINUITY_C2;
}
else if(areParallel(rBackVector, aInverseForwardVector))
{
// same direction -> C1
eRetval = CONTINUITY_C1;
}
}
return eRetval;
}
} // end of namespace basegfx
// eof
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