LUMIERA.clone/src/proc/mobject/session/relativelocation.hpp
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2007-11-27 03:19:35 +01:00

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/*
RELATIVELOCATION.hpp - Placement implementation attaching MObjects relative to another one
Copyright (C) CinelerraCV
2007, Hermann Vosseler <Ichthyostega@web.de>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef MOBJECT_SESSION_RELATIVELOCATION_H
#define MOBJECT_SESSION_RELATIVELOCATION_H
#include "proc/mobject/session/locatingpin.hpp"
namespace mobject
{
namespace session
{
class RelativeLocation : public LocatingPin
{
const PMO & anchor_; ////////////TODO: ooooops, this is a nasty design problem!!!
public:
/**
* the possible kinds of RelativePlacements
*/
enum RelType
{ SAMETIME /**< place subject at the same time as the anchor */
, ATTACH /**< attach subject to anchor (e.g. an effect to a clip) */
};
protected:
RelativeLocation (const PMO& a, Time ofs) : anchor_(a), offset_(ofs) { }
friend class LocatingPin;
/** the kind of relation denoted by this Placement */
RelType relType;
/** Offset the actual position by this (time) value relative to the anchor point. */
Time offset_;
//TODO: suitable representation?
virtual void intersect (LocatingSolution&) const;
public:
virtual RelativeLocation* clone () const;
};
} // namespace mobject::session
} // namespace mobject
#endif