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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>
void Point::RotateAround( Point& rPoint,
Degree10 nOrientation ) const
{
tools::Long nX = rPoint.X();
tools::Long nY = rPoint.Y();
RotateAround(nX, nY, nOrientation);
rPoint.setX(nX);
rPoint.setY(nY);
}
void Point::RotateAround( tools::Long& rX, tools::Long& rY,
Degree10 nOrientation ) const
{
const tools::Long nOriginX = X();
const tools::Long nOriginY = Y();
if ( (nOrientation >= 0_deg10) && !(nOrientation % 900_deg10) )
{
if ( nOrientation >= 3600_deg10 )
nOrientation %= 3600_deg10;
if ( nOrientation )
{
rX -= nOriginX;
rY -= nOriginY;
if ( nOrientation == 900_deg10 )
{
tools::Long nTemp = rX;
rX = rY;
rY = -nTemp;
}
else if ( nOrientation == 1800_deg10 )
{
rX = -rX;
rY = -rY;
}
else /* ( nOrientation == 2700 ) */
{
tools::Long nTemp = rX;
rX = -rY;
rY = nTemp;
}
rX += nOriginX;
rY += nOriginY;
}
}
else
{
double nRealOrientation = toRadians(nOrientation);
double nCos = cos( nRealOrientation );
double nSin = sin( nRealOrientation );
// Translation...
tools::Long nX = rX-nOriginX;
tools::Long nY = rY-nOriginY;
// Rotation...
rX = + static_cast<tools::Long>(nCos*nX + nSin*nY) + nOriginX;
rY = - static_cast<tools::Long>(nSin*nX - nCos*nY) + nOriginY;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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