X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=flower%2Finclude%2Foffset.hh;h=a8c5987801069b01790b545b4a12db4c70923bfc;hb=97a0169312a260933246ab224e4f8b0969871dd5;hp=eaefeb26bb5a8a8b19a39df680c2063c929986c7;hpb=7e8fe57c989986b0948b08f4f1c09ac620abba10;p=lilypond.git

diff --git a/flower/include/offset.hh b/flower/include/offset.hh
index eaefeb26bb..a8c5987801 100644
--- a/flower/include/offset.hh
+++ b/flower/include/offset.hh
@@ -1,20 +1,29 @@
 /*
-  offset.hh -- part of GNU LilyPond
+  This file is part of LilyPond, the GNU music typesetter.
 
-  (c) 1996--2005 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
 #define OFFSET_HH
 
 #include "axis.hh"
-#include "string.hh"
+#include "std-string.hh"
 #include "real.hh"
 
-Offset complex_multiply (Offset, Offset);
-Offset complex_divide (Offset, Offset);
-Offset complex_exp (Offset);
-
 /*
   This is a mixture a 2D vector. Sometimes it can
   also be convenient to think of 2D vectors as complex numbers
@@ -67,6 +76,12 @@ public:
     return *this;
   }
 
+  Offset &operator /= (Real a)
+  {
+    (*this) *= 1 / a;
+    return *this;
+  }
+
   Offset &operator *= (Real a)
   {
     (*this)[X_AXIS] *= a;
@@ -86,28 +101,37 @@ public:
     coordinate_a_[X_AXIS] = coordinate_a_[Y_AXIS] = 0.0;
   }
 
-  String to_string () const;
+  string to_string () const;
 
   Offset &mirror (Axis a)
   {
     coordinate_a_[a] = -coordinate_a_[a];
     return *this;
   }
+  Offset direction () const;
+  Offset swapped () const;
 
-  Real arg () const;
+  Real angle_degrees () const;
   Real length () const;
   bool is_sane () const;
-  Offset operator *= (Offset z2)
-  {
-    *this = complex_multiply (*this, z2);
-    return *this;
-  }
+  Offset operator *= (Offset z2);
 };
 
+#include "arithmetic-operator.hh"
 IMPLEMENT_ARITHMETIC_OPERATOR (Offset, +);
 IMPLEMENT_ARITHMETIC_OPERATOR (Offset, -);
 IMPLEMENT_ARITHMETIC_OPERATOR (Offset, *);
 
+Offset complex_multiply (Offset, Offset);
+Offset offset_directed (Real);
+
+inline Offset
+Offset::operator *= (Offset z2)
+{
+  *this = complex_multiply (*this, z2);
+  return *this;
+}
+
 inline Offset
 operator * (Real o1, Offset o2)
 {
@@ -115,6 +139,13 @@ operator * (Real o1, Offset o2)
   return o2;
 }
 
+inline Offset
+operator / (Offset o1, Real a)
+{
+  o1 /= a;
+  return o1;
+}
+
 inline Offset
 operator * (Offset o1, Real o2)
 {
@@ -136,5 +167,13 @@ dot_product (Offset o1, Offset o2)
   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 */