/*
- offset.hh -- part of GNU LilyPond
+ This file is part of LilyPond, the GNU music typesetter.
- (c) 1996--2007 Han-Wen Nienhuys
+ Copyright (C) 1996--2015 Han-Wen Nienhuys
+
+ LilyPond 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.
+
+ LilyPond 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 LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OFFSET_HH
#include "std-string.hh"
#include "real.hh"
-
/*
This is a mixture a 2D vector. Sometimes it can
also be convenient to think of 2D vectors as complex numbers
Offset &operator /= (Real a)
{
- (*this) *= 1/a;
+ (*this) *= 1 / a;
return *this;
}
}
Offset direction () const;
Offset swapped () const;
-
- Real arg () const;
+
Real angle_degrees () const;
Real length () const;
bool is_sane () const;
IMPLEMENT_ARITHMETIC_OPERATOR (Offset, -);
IMPLEMENT_ARITHMETIC_OPERATOR (Offset, *);
-
-
Offset complex_multiply (Offset, Offset);
-Offset complex_divide (Offset, Offset);
-Offset complex_exp (Offset);
+Offset offset_directed (Real);
inline Offset
Offset::operator *= (Offset z2)
return o1[X_AXIS] * o2[X_AXIS] + o1[Y_AXIS] * o2[Y_AXIS];
}
+inline
+Real
+cross_product (Offset o1, Offset o2)
+{
+ return o1[X_AXIS] * o2[Y_AXIS] - o1[Y_AXIS] * o2[X_AXIS];
+}
+
+
#endif /* OFFSET_HH */