/*
- misc.cc -- implement various stuff
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
+
+ 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/>.
*/
+#include <complex>
#include "misc.hh"
+#include "offset.hh"
+#include "warn.hh"
/*
Return the 2-log, rounded down
return ceil (f);
}
-
-
/*
0 at threshold, 1 at 0, with 1/x falloff.
*/
Real
-peak_around (Real epsilon, Real threshold, Real x)
+peak_around (Real epsilon, Real threshold, Real x)
{
if (x < 0)
return 1.0;
}
/*
- 0 at 0, 1 at standard_x, and increasing thereafter.
+ 0 at 0, 1 at standard_x, and increasing thereafter.
*/
Real
convex_amplifier (Real standard_x, Real increase_factor, Real x)
{
- return (exp (increase_factor * x / standard_x) - 1.0) / (exp (increase_factor) - 1.0);
+ return (exp (increase_factor * x / standard_x) - 1.0) / (exp (increase_factor) - 1.0);
}
string
-camel_case_to_lisp_identifier (string in)
+camel_case_to_lisp_identifier (const string &in)
{
vector<char> out;
-
+
/* don't add '-' before first character */
out.push_back (char (tolower (in[0])));
-
+
for (size_t inpos = 1; inpos < in.size (); inpos++)
{
if (isupper (in[inpos]))
- out.push_back ('-');
- out.push_back ( char(tolower (in[inpos])));
+ out.push_back ('-');
+ out.push_back ( char (tolower (in[inpos])));
}
-
+
string result (&out[0], out.size ());
replace_all (&result, '_', '-');
return result;
}
+Offset
+get_point_in_y_direction (Offset orig, Real slope, Real dist, Direction dir)
+{
+ if (slope == infinity_f)
+ return orig + Offset (dir * dist, 0.0);
+
+ Real x = slope == 0.0 ? 1.0 * dir : 1.0 * sign (slope) * dir;
+ Real y = slope * x;
+ Real angle = atan2 (y, x);
+
+ complex<Real> orig_c (orig[X_AXIS], orig[Y_AXIS]);
+ complex<Real> to_move = polar (dist, angle);
+ complex<Real> res = orig_c + to_move;
+
+ return Offset (real (res), imag (res));
+}