/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 1996--2010 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
#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;
IMPLEMENT_ARITHMETIC_OPERATOR (Offset, -);
IMPLEMENT_ARITHMETIC_OPERATOR (Offset, *);
-
-
Offset complex_multiply (Offset, Offset);
Offset complex_divide (Offset, Offset);
Offset complex_exp (Offset);
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 */