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// $Id: Angle.hh 2641 2007-09-02 21:31:02Z flaterco $
// Angle
/*
Copyright (C) 1997 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/>.
*/
class Angle {
public:
Angle (); // Creates a zero angle.
inline Angle (Units::AngleUnits units, double value):
radians((units == Units::degrees) ? (value * M_PI / 180.0) : value) {}
inline void operator+= (Angle a) {
radians += a.radians;
}
void operator-= (Angle a);
protected:
double radians;
// XTide never needs the actual angle--it only needs the sine or
// cosine of it. So if the value is hidden from everything except
// sin and cos, we can dispense with normalization.
friend const double sin (Angle a);
friend const double cos (Angle a);
};
inline const double cos (Angle a) {
return ::cos (a.radians);
}
inline const Angle operator+ (Angle a, Angle b) {
a += b;
return a;
}
// Cleanup2006 Done
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