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// $Id: CurrentBearing.hh 2641 2007-09-02 21:31:02Z flaterco $
/*
CurrentBearing: Store and print <int> or <int> true, or null.
Copyright (C) 1998 David Flater.
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 3 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, see <http://www.gnu.org/licenses/>.
*/
// The redundancy between CurrentBearing and Angle is illusory. XTide
// never needs to do anything with current directions except store
// them and print them in degrees. They can't even be floats (libtcd
// ships ints). However, they can be null.
class CurrentBearing: public Nullable {
public:
CurrentBearing (); // Creates a null CurrentBearing.
// Units must be degrees. Value must be between 0 and 359. Set the
// bool if they are "degrees true."
// AFAIK the only alternative is "degrees relative," which would be
// useless, but, whatever.
CurrentBearing (uint16_t degrees, bool isTrue);
// Print value in degrees with a degrees symbol and possibly a
// "true" qualifier attached. This does not have fixed field width.
// It is an error to attempt to print a null CurrentBearing.
void print (Dstr &text_out) const;
protected:
uint16_t _degrees;
bool isDegreesTrue;
};
// Cleanup2006 Done
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