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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* 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
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <tools/gen.hxx>
#include <basegfx/numeric/ftools.hxx>
void Point::RotateAround( Point& rPoint,
short nOrientation ) const
{
long nX = rPoint.X();
long nY = rPoint.Y();
RotateAround(nX, nY, nOrientation);
rPoint.setX(nX);
rPoint.setY(nY);
}
void Point::RotateAround( long& rX, long& rY,
short nOrientation ) const
{
const long nOriginX = X();
const long nOriginY = Y();
if ( (nOrientation >= 0) && !(nOrientation % 900) )
{
if ( nOrientation >= 3600 )
nOrientation %= 3600;
if ( nOrientation )
{
rX -= nOriginX;
rY -= nOriginY;
if ( nOrientation == 900 )
{
long nTemp = rX;
rX = rY;
rY = -nTemp;
}
else if ( nOrientation == 1800 )
{
rX = -rX;
rY = -rY;
}
else /* ( nOrientation == 2700 ) */
{
long nTemp = rX;
rX = -rY;
rY = nTemp;
}
rX += nOriginX;
rY += nOriginY;
}
}
else
{
double nRealOrientation = nOrientation*F_PI1800;
double nCos = cos( nRealOrientation );
double nSin = sin( nRealOrientation );
// Translation...
long nX = rX-nOriginX;
long nY = rY-nOriginY;
// Rotation...
rX = + static_cast<long>(nCos*nX + nSin*nY) + nOriginX;
rY = - static_cast<long>(nSin*nX - nCos*nY) + nOriginY;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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