X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=flower%2Foffset.cc;h=67b97865e55ebe5f723fd2f717616257b72f9d48;hb=f0bd72f53dca7b79853a70007e53f31d7e21ac76;hp=a3ed32aecbbb9ac447d6450411bbe3c34e780a03;hpb=58bcc84c9480dae1b21bc24d8396b91fe19e0131;p=lilypond.git

diff --git a/flower/offset.cc b/flower/offset.cc
index a3ed32aecb..67b97865e5 100644
--- a/flower/offset.cc
+++ b/flower/offset.cc
@@ -3,30 +3,22 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
 #include "offset.hh"
 
-#include <cmath>
-
 #ifndef STANDALONE
-String
+string
 Offset::to_string () const
 {
-  String s;
-  s = String (" (") + ::to_string (coordinate_a_[X_AXIS]) + ", "
+  string s;
+  s = string (" (") + ::to_string (coordinate_a_[X_AXIS]) + ", "
     + ::to_string (coordinate_a_[Y_AXIS]) + ")";
   return s;
 }
 #endif
 
-bool
-isinf_b (Real r)
-{
-  return (fabs (r) > 1e20);
-}
-
 /*
   free bsd fix by John Galbraith
 */
@@ -35,9 +27,9 @@ Offset
 complex_multiply (Offset z1, Offset z2)
 {
   Offset z;
-  if (!isinf_b (z2[Y_AXIS]))
+  if (!isinf (z2[Y_AXIS]))
     {
-      z[X_AXIS] = z1[X_AXIS] * z2[X_AXIS] - z1[Y_AXIS]*z2[Y_AXIS];
+      z[X_AXIS] = z1[X_AXIS] * z2[X_AXIS] - z1[Y_AXIS] * z2[Y_AXIS];
       z[Y_AXIS] = z1[X_AXIS] * z2[Y_AXIS] + z1[Y_AXIS] * z2[X_AXIS];
     }
   return z;
@@ -67,7 +59,7 @@ complex_exp (Offset o)
 
   Real r = exp (o[X_AXIS]);
 
-  return Offset (r*c, r*s);
+  return Offset (r * c, r * s);
 }
 
 Real
@@ -76,11 +68,40 @@ Offset::arg () const
   return atan2 (coordinate_a_[Y_AXIS], coordinate_a_[X_AXIS]);
 }
 
+Real
+Offset::angle_degrees () const
+{
+  return arg () * 180 / M_PI;
+}
 /**
    euclidian vector length / complex modulus
 */
 Real
 Offset::length () const
 {
-  return sqrt (sqr (coordinate_a_[X_AXIS]) + sqr (coordinate_a_[Y_AXIS]));
+  return sqrt (sqr (coordinate_a_[X_AXIS])
+		    + sqr (coordinate_a_[Y_AXIS]));
+}
+
+bool
+Offset::is_sane () const
+{
+  return !isnan (coordinate_a_[X_AXIS])
+    && !isnan (coordinate_a_ [Y_AXIS])
+    && !isinf (coordinate_a_[X_AXIS]) 
+    && !isinf (coordinate_a_[Y_AXIS]);
+}
+
+Offset
+Offset::direction () const
+{
+  Offset d = *this;
+  d /= length (); 
+  return d;
+}
+
+Offset
+Offset::swapped () const
+{
+  return Offset (coordinate_a_[Y_AXIS], coordinate_a_[X_AXIS]);
 }