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BoxRegion.C
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C/C++ Source or Header
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1998-11-23
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// $Id: BoxRegion.C,v 1.9 1998/11/23 17:43:17 zeller Exp $ -*- C++ -*-
// BoxRegion class
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// This file is part of DDD.
//
// DDD is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// DDD 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page,
// `http://www.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
char BoxRegion_rcsid[] =
"$Id: BoxRegion.C,v 1.9 1998/11/23 17:43:17 zeller Exp $";
#ifdef __GNUG__
#pragma implementation
#endif
#include "BoxRegion.h"
// Compute intersection of two regions
BoxRegion BoxRegion::operator & (const BoxRegion& r) const
{
if (!origin().isValid())
return r;
if (!r.origin().isValid())
return *this;
BoxPoint nw_corner(max(origin(X), r.origin(X)),
max(origin(Y), r.origin(Y)));
BoxPoint se_corner(min(origin(X) + space(X), r.origin(X) + r.space(X)),
min(origin(Y) + space(Y), r.origin(Y) + r.space(Y)));
return BoxRegion(nw_corner, BoxSize(se_corner - nw_corner));
}
// Compute union of two regions
BoxRegion BoxRegion::operator | (const BoxRegion& r) const
{
if (!origin().isValid())
return r;
if (!r.origin().isValid())
return *this;
BoxPoint nw_corner(min(origin(X), r.origin(X)),
min(origin(Y), r.origin(Y)));
BoxPoint se_corner(max(origin(X) + space(X), r.origin(X) + r.space(X)),
max(origin(Y) + space(Y), r.origin(Y) + r.space(Y)));
return BoxRegion(nw_corner, BoxSize(se_corner - nw_corner));
}
// Dump
ostream& operator << (ostream& s, const BoxRegion& r)
{
return s << r.origin() << r.space();
}