/*
- tex-beam.cc -- implement Lookup::{beam_element, beam, rule_symbol}
+ tex-beam.cc -- implement Lookup::beam
source file of the GNU LilyPond music typesetter
- (c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1996, 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
/*
#include "molecule.hh"
#include "tex.hh"
#include "symtable.hh"
-#include "dimen.hh"
+#include "dimension.hh"
#include "debug.hh"
#include "lookup.hh"
#include "misc.hh"
-
-Atom
-Lookup::beam_element (int sidx, int widx, Real slope) const
-{
- String name = String("slope");
- Atom bs=(*symtables_p_)("beamslopes")->lookup (name);
-
- 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;
-}
+#include "paper-def.hh"
+#include "string-convert.hh"
+#include "main.hh"
Atom
Lookup::rule_symbol (Real height, Real width) const
{
- Atom bs=(*symtables_p_)("beamslopes")->lookup ("horizontal");
+ Atom bs=(*symtables_p_)("param")->lookup ("rule");
Array<String> args;
args.push (print_dimen (height));
args.push (print_dimen (width));
return bs;
}
-Atom
-Lookup::beam (Real &slope, Real width) const
+Atom
+Lookup::beam(Real slope, Real width, Real thick) const
{
- const Real MAX_SLOPE = 0.6;
- const Real SLOPES = 20.0;
- int sidx = 0;
- if (abs (slope) > MAX_SLOPE)
- {
- WARN << _("beam too steep (") << slope << ")\n";
- slope = sign (slope) * MAX_SLOPE;
- }
-
- sidx = int (rint (slope / MAX_SLOPE * SLOPES));
- slope = MAX_SLOPE * sidx / SLOPES;
-
- Interval xdims = (*symtables_p_)("beamslopes")->lookup ("slope").dim_[X_AXIS];
- Real min_wid = xdims[LEFT];
- Real max_wid = xdims[RIGHT];
- assert(max_wid > 0);
- int widths = intlog2 (int (max_wid/min_wid)) + 1;
-
- if (width < min_wid)
- {
- WARN<<_("Beam too narrow. (") << print_dimen (width) <<")\n";
- width = min_wid;
- }
-
- Real elemwidth = max_wid;
-
- int widx =widths - 1;
- 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 * widths, widx, slope));
- m.add (elem);
- while (x < last_x)
- {
- Atom a(elem);
- a.translate (Offset (x-overlap, (x-overlap)*slope));
- m.add (a);
- x += elemwidth - overlap;
- }
- Atom a(elem);
- a.translate (Offset (last_x, (last_x) * slope));
- m.add (a);
+
+ 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;
+
+ a.dim_[X_AXIS] = Interval(0, width);
+ a.dim_[Y_AXIS] = Interval(min_y, max_y);
+ return a;
+}
- Atom ret;
- ret.tex_ = m.TeX_string();
- ret.dim_.y() = Interval (0,width*slope);
- ret.dim_.x() = Interval (0,width);
+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}";
- return ret;
+ Atom s;
+ s.tex_ = ps;
+ return s;
}
+