/*
+ tex-beam.cc -- implement Lookup::beam
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1996, 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
+/*
Code to generate beams for TeX
-
*/
#include <math.h>
-#include "symbol.hh"
+#include "atom.hh"
#include "molecule.hh"
#include "tex.hh"
#include "symtable.hh"
-#include "dimen.hh"
+#include "dimension.hh"
#include "debug.hh"
#include "lookup.hh"
+#include "misc.hh"
+#include "paper-def.hh"
+#include "string-convert.hh"
+#include "main.hh"
-Symbol
-Lookup::beam_element (int sidx, int widx, Real slope) const
-{
- Symbol bs=(*symtables_)("beamslopes")->lookup ("slope");
-
- Array<String> args;
- args.push (sidx);
- args.push (widx);
- bs.tex = substitute_args (bs.tex,args);
- int w = 2 << widx;
- Real width = w PT;
- bs.dim.x() = Interval (0,width);
- bs.dim.y() = Interval (0,width*slope);
- return bs;
-}
-
-// ugh.. hard wired tex-code.
-static int
-slope_index (Real &s)
-{
- if (abs (s) > 0.5)
- {
- WARN << "beam steeper than 0.5 (" << s << ")\n";
- s = sign (s) * 0.5;
- }
-
- int i = int (rint (s * 20.0));
- s = i/20.0;
- if (s>0)
- return 6*i +122;
- else
- return -6 * i+ 186;
-}
-
-Symbol
+Atom
Lookup::rule_symbol (Real height, Real width) const
{
- Symbol bs=(*symtables_)("beamslopes")->lookup ("horizontal");
+ Atom bs=(*symtables_p_)("param")->lookup ("rule");
Array<String> args;
args.push (print_dimen (height));
args.push (print_dimen (width));
- bs.tex = substitute_args (bs.tex,args);
- bs.dim.x() = Interval (0,width);
- bs.dim.y() = Interval (0,height);
+ bs.tex_ = substitute_args (bs.tex_,args);
+ bs.dim_.x() = Interval (0,width);
+ bs.dim_.y() = Interval (0,height);
return bs;
}
-Symbol
-Lookup::beam (Real &slope, Real width) const
-{
- int sidx = slope_index (slope);
- if (!slope)
- return rule_symbol (2 PT, width);
- if (width < 2 PT)
- {
- WARN<<"Beam too narrow. (" << print_dimen (width) <<")\n";
- width = 2 PT;
- }
- Real elemwidth = 64 PT;
- int widx = 5;
-
- Molecule m;
-
- while (elemwidth > width)
- {
- widx --;
- elemwidth /= 2.0;
- }
- Real overlap = elemwidth/4;
- Real last_x = width - elemwidth;
- Real x = overlap;
- Atom elem (beam_element (sidx, widx, slope));
- Atom a (elem);
- m.add (a);
- while (x < last_x)
- {
- a=elem;
- a.translate (Offset (x-overlap, (x-overlap)*slope));
- m.add (a);
- x += elemwidth - overlap;
- }
- a=elem;
- a.translate (Offset (last_x, (last_x) * slope));
- m.add (a);
+Atom
+Lookup::beam(Real slope, Real width, Real thick) const
+{
- Symbol ret;
- ret.tex = m.TeX_string();
- ret.dim.y() = Interval (0,width*slope);
- ret.dim.x() = Interval (0,width);
+ Atom a (ps_beam (slope, width, thick));
+ Real height = slope * width;
+ Real min_y = (0 <? height) - thick/2;
+ Real max_y = (0 >? height) + thick/2;
- return ret;
+ a.dim_[X_AXIS] = Interval(0, width);
+ a.dim_[Y_AXIS] = Interval(min_y, max_y);
+ return a;
}
+Atom
+Lookup::ps_beam (Real slope, Real width, Real thick) const
+{
+ String ps = "\\embeddedps{\n";
+ ps += to_str (width) + " "+ to_str (slope) + " " + to_str (thick)
+ + " draw_beam}";
+
+ Atom s;
+ s.tex_ = ps;
+ return s;
+}