/*
- lookup.cc -- implement simple Lookup methods.
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
- TODO
- Glissando
+ 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 <math.h>
-#include <ctype.h>
+#include "lookup.hh"
+
+#include <cmath>
+#include <cctype>
+using namespace std;
+
+#include "line-interface.hh"
#include "warn.hh"
+#include "international.hh"
#include "dimensions.hh"
#include "bezier.hh"
-#include "string-convert.hh"
#include "file-path.hh"
#include "main.hh"
#include "lily-guile.hh"
-#include "molecule.hh"
-#include "lookup.hh"
-#include "font-metric.hh"
-Molecule
-Lookup::beam (Real slope, Real width, Real thick)
+Stencil
+Lookup::beam (Real slope, Real width, Real thick, Real blot)
{
- Real height = slope * width;
- Real min_y = (0 <? height) - thick/2;
- Real max_y = (0 >? height) + thick/2;
-
-
-
- Box b( Interval (0, width),
- Interval (min_y, max_y));
-
-
- SCM at = gh_list (ly_symbol2scm ("beam"),
- gh_double2scm (width),
- gh_double2scm (slope),
- gh_double2scm (thick),
- SCM_UNDEFINED);
- return Molecule (b, at);
-}
+ Box b;
+ Offset p;
+ p = Offset (0, thick / 2);
+ b.add_point (p);
+ p += Offset (1, -1) * (blot / 2);
-Molecule
-Lookup::dashed_slur (Bezier b, Real thick, Real dash)
-{
- SCM l = SCM_EOL;
+ SCM points = SCM_EOL;
- for (int i= 4; i -- ;)
- {
- l = gh_cons (ly_offset2scm (b.control_[i]), l);
- }
+ points = scm_cons (scm_from_double (p[X_AXIS]),
+ scm_cons (scm_from_double (p[Y_AXIS]),
+ points));
- SCM at = (gh_list (ly_symbol2scm ("dashed-slur"),
- gh_double2scm (thick),
- gh_double2scm (dash),
- ly_quote_scm (l),
- SCM_UNDEFINED));
+ p = Offset (0, -thick / 2);
+ b.add_point (p);
+ p += Offset (1, 1) * (blot / 2);
- Box box (Interval(0,0),Interval( 0,0));
- return Molecule (box, at);
-}
+ points = scm_cons (scm_from_double (p[X_AXIS]),
+ scm_cons (scm_from_double (p[Y_AXIS]),
+ points));
+
+ p = Offset (width, width * slope - thick / 2);
+ b.add_point (p);
+ p += Offset (-1, 1) * (blot / 2);
+
+ points = scm_cons (scm_from_double (p[X_AXIS]),
+ scm_cons (scm_from_double (p[Y_AXIS]),
+ points));
+
+ p = Offset (width, width * slope + thick / 2);
+ b.add_point (p);
+ p += Offset (-1, -1) * (blot / 2);
+ points = scm_cons (scm_from_double (p[X_AXIS]),
+ scm_cons (scm_from_double (p[Y_AXIS]),
+ points));
+ SCM expr = scm_list_n (ly_symbol2scm ("polygon"),
+ ly_quote_scm (points),
+ scm_from_double (blot),
+ SCM_BOOL_T,
+ SCM_UNDEFINED);
+ return Stencil (b, expr);
+}
-Molecule
-Lookup::blank (Box b)
+Stencil
+Lookup::rotated_box (Real slope, Real width, Real thick, Real blot)
{
- return Molecule (b, SCM_EOL);
+ vector<Offset> pts;
+ Offset rot (1, slope);
+
+ thick -= 2 * blot;
+ width -= 2 * blot;
+ rot /= sqrt (1 + slope * slope);
+ pts.push_back (Offset (0, -thick / 2) * rot);
+ pts.push_back (Offset (width, -thick / 2) * rot);
+ pts.push_back (Offset (width, thick / 2) * rot);
+ pts.push_back (Offset (0, thick / 2) * rot);
+ return Lookup::round_filled_polygon (pts, blot);
}
+Stencil
+Lookup::horizontal_line (Interval w, Real th)
+{
+ SCM at = scm_list_n (ly_symbol2scm ("draw-line"),
+ scm_from_double (th),
+ scm_from_double (w[LEFT]),
+ scm_from_double (0),
+ scm_from_double (w[RIGHT]),
+ scm_from_double (0),
+ SCM_UNDEFINED);
+
+ Box box;
+ box[X_AXIS] = w;
+ box[Y_AXIS] = Interval (-th / 2, th / 2);
+
+ return Stencil (box, at);
+}
-Molecule
-Lookup::filledbox (Box b )
+Stencil
+Lookup::blank (Box b)
{
- SCM at = (gh_list (ly_symbol2scm ("filledbox"),
- gh_double2scm (-b[X_AXIS][LEFT]),
- gh_double2scm (b[X_AXIS][RIGHT]),
- gh_double2scm (-b[Y_AXIS][DOWN]),
- gh_double2scm (b[Y_AXIS][UP]),
- SCM_UNDEFINED));
-
- return Molecule ( b,at);
+ return Stencil (b, scm_from_locale_string (""));
}
-Molecule
-Lookup::frame (Box b, Real thick)
+Stencil
+Lookup::circle (Real rad, Real thick, bool filled)
{
- Molecule m;
- Direction d = LEFT;
- Axis a = X_AXIS;
- while (a < NO_AXES)
- {
- do
- {
- Axis o = Axis ((a+1)%NO_AXES);
-
- Box edges;
- edges[a] = b[a][d] + 0.5 * thick * Interval (-1, 1);
- edges[o][DOWN] = b[o][DOWN] - thick/2;
- edges[o][UP] = b[o][UP] + thick/2;
-
-
- m.add_molecule (filledbox (edges));
- }
- while (flip (&d) != LEFT);
- }
- return m;
-
+ Box b (Interval (-rad, rad), Interval (-rad, rad));
+ return Stencil (b, scm_list_4 (ly_symbol2scm ("circle"),
+ scm_from_double (rad),
+ scm_from_double (thick),
+ scm_from_bool (filled)));
}
+Stencil
+Lookup::filled_box (Box b)
+{
+ return round_filled_box (b, 0.0);
+}
/*
- Make a smooth curve along the points
+ * round filled box:
+ *
+ * __________________________________
+ * / \ ^ / \ ^
+ * | |blot | |
+ * | | |dia | | |
+ * | |meter | |
+ * |\ _ _ / v \ _ _ /| |
+ * | | |
+ * | | | Box
+ * | <------>| | extent
+ * | blot | | (Y_AXIS)
+ * | diameter| |
+ * | | |
+ * | _ _ _ _ | |
+ * |/ \ / \| |
+ * | | |
+ * | | | | |
+ * | | |
+ * x\_____/______________\_____/|_____v
+ * |(0, 0) |
+ * | |
+ * | |
+ * |<-------------------------->|
+ * Box extent (X_AXIS)
*/
-Molecule
-Lookup::slur (Bezier curve, Real curvethick, Real linethick)
+Stencil
+Lookup::round_filled_box (Box b, Real blotdiameter)
{
- Real alpha = (curve.control_[3] - curve.control_[0]).arg ();
- Bezier back = curve;
+ Real width = b.x ().delta ();
+ blotdiameter = min (blotdiameter, width);
+ Real height = b.y ().delta ();
+ blotdiameter = min (blotdiameter, height);
- back.reverse ();
- back.control_[1] += curvethick * complex_exp (Offset (0, alpha + M_PI/2));
- back.control_[2] += curvethick * complex_exp (Offset (0, alpha + M_PI/2));
-
- SCM scontrols[8];
-
- for (int i=4; i--;)
- scontrols[ i ] = ly_offset2scm(back.control_[i]);
- for (int i=4 ; i--;)
- scontrols[i+4] = ly_offset2scm (curve.control_[i]);
-
- /*
- Need the weird order b.o. the way PS want its arguments
- */
- int indices[]= {5, 6, 7, 4, 1, 2, 3, 0};
- SCM list = SCM_EOL;
- for (int i= 8; i--; )
+ if (blotdiameter < 0.0)
{
- list = gh_cons (scontrols[indices[i]], list);
+ if (!isinf (blotdiameter))
+ warning (_f ("Not drawing a box with negative dimension, %.2f by %.2f.",
+ width, height));
+ return Stencil (b, SCM_EOL);
}
-
-
- SCM at = (gh_list (ly_symbol2scm ("bezier-sandwich"),
- ly_quote_scm (list),
- gh_double2scm (linethick),
- SCM_UNDEFINED));
-
- Box b ( curve.extent (X_AXIS), curve.extent (Y_AXIS));
- return Molecule (b, at);
+
+ SCM at = (scm_list_n (ly_symbol2scm ("round-filled-box"),
+ scm_from_double (-b[X_AXIS][LEFT]),
+ scm_from_double (b[X_AXIS][RIGHT]),
+ scm_from_double (-b[Y_AXIS][DOWN]),
+ scm_from_double (b[Y_AXIS][UP]),
+ scm_from_double (blotdiameter),
+ SCM_UNDEFINED));
+
+ return Stencil (b, at);
}
-Molecule
-Lookup::accordion (SCM s, Real staff_space, Font_metric *fm)
+/*
+ * Create Stencil that represents a filled polygon with round edges.
+ *
+ * LIMITATIONS:
+ *
+ * (a) Only outer (convex) edges are rounded.
+ *
+ * (b) This algorithm works as expected only for polygons whose edges
+ * do not intersect. For example, the polygon ((0, 0), (q, 0), (0,
+ * q), (q, q)) has an intersection at point (q/2, q/2) and therefore
+ * will give a strange result. Even non-adjacent edges that just
+ * touch each other will in general not work as expected for non-null
+ * blotdiameter.
+ *
+ * (c) Given a polygon ((x0, y0), (x1, y1), ... , (x (n-1), y (n-1))),
+ * if there is a natural number k such that blotdiameter is greater
+ * than the maximum of { | (x (k mod n), y (k mod n)) - (x ((k+1) mod n),
+ * y ((k+1) mod n)) |, | (x (k mod n), y (k mod n)) - (x ((k+2) mod n),
+ * y ((k+2) mod n)) |, | (x ((k+1) mod n), y ((k+1) mod n)) - (x ((k+2)
+ * mod n), y ((k+2) mod n)) | }, then the outline of the rounded
+ * polygon will exceed the outline of the core polygon. In other
+ * words: Do not draw rounded polygons that have a leg smaller or
+ * thinner than blotdiameter (or set blotdiameter to a sufficiently
+ * small value -- maybe even 0.0)!
+ *
+ * NOTE: Limitations (b) and (c) arise from the fact that round edges
+ * are made by moulding sharp edges to round ones rather than adding
+ * to a core filled polygon. For details of these two different
+ * approaches, see the thread upon the ledger lines patch that started
+ * on March 25, 2002 on the devel mailing list. The below version of
+ * round_filled_polygon () sticks to the moulding model, which the
+ * majority of the list participants finally voted for. This,
+ * however, results in the above limitations and a much increased
+ * complexity of the algorithm, since it has to compute a shrinked
+ * polygon -- which is not trivial define precisely and unambigously.
+ * With the other approach, one simply could move a circle of size
+ * blotdiameter along all edges of the polygon (which is what the
+ * postscript routine in the backend effectively does, but on the
+ * shrinked polygon). --jr
+ */
+Stencil
+Lookup::round_filled_polygon (vector<Offset> const &points,
+ Real blotdiameter)
{
- Molecule m;
- String sym = ly_scm2string(gh_car (s));
- String reg = ly_scm2string(gh_car (gh_cdr(s)));
+ /* TODO: Maybe print a warning if one of the above limitations
+ applies to the given polygon. However, this is quite complicated
+ to check. */
- if (sym == "Discant")
+ const Real epsilon = 0.01;
+
+#ifndef NDEBUG
+ /* remove consecutive duplicate points */
+ for (vsize i = 0; i < points.size (); i++)
{
- Molecule r = fm->find_by_name ("accordion-accDiscant");
- m.add_molecule(r);
- if (reg.left_str(1) == "F")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 2.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
- int eflag = 0x00;
- if (reg.left_str(3) == "EEE")
- {
- eflag = 0x07;
- reg = reg.right_str(reg.length_i()-3);
- }
- else if (reg.left_str(2) == "EE")
- {
- eflag = 0x05;
- reg = reg.right_str(reg.length_i()-2);
- }
- else if (reg.left_str(2) == "Eh")
- {
- eflag = 0x04;
- reg = reg.right_str(reg.length_i()-2);
- }
- else if (reg.left_str(1) == "E")
- {
- eflag = 0x02;
- reg = reg.right_str(reg.length_i()-1);
- }
- if (eflag & 0x02)
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 1.5 PT, Y_AXIS);
- m.add_molecule(d);
- }
- if (eflag & 0x04)
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 1.5 PT, Y_AXIS);
- d.translate_axis(0.8 * staff_space PT, X_AXIS);
- m.add_molecule(d);
- }
- if (eflag & 0x01)
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 1.5 PT, Y_AXIS);
- d.translate_axis(-0.8 * staff_space PT, X_AXIS);
- m.add_molecule(d);
- }
- if (reg.left_str(2) == "SS")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(0.5 * staff_space PT, Y_AXIS);
- d.translate_axis(0.4 * staff_space PT, X_AXIS);
- m.add_molecule(d);
- d.translate_axis(-0.8 * staff_space PT, X_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-2);
- }
- if (reg.left_str(1) == "S")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(0.5 * staff_space PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
+ int next = (i + 1) % points.size ();
+ Real d = (points[i] - points[next]).length ();
+ if (d < epsilon)
+ programming_error ("Polygon should not have duplicate points");
}
- else if (sym == "Freebase")
+#endif
+
+ /* special cases: degenerated polygons */
+ if (points.size () == 0)
+ return Stencil ();
+ if (points.size () == 1)
{
- Molecule r = fm->find_by_name ("accordion-accFreebase");
- m.add_molecule(r);
- if (reg.left_str(1) == "F")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 1.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
- if (reg == "E")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 0.5 PT, Y_AXIS);
- m.add_molecule(d);
- }
+ Stencil circ = circle (0.5 * blotdiameter, 0, true);
+ circ.translate (points[0]);
+ return circ;
}
- else if (sym == "Bayanbase")
+ if (points.size () == 2)
+ return Line_interface::make_line (blotdiameter, points[0], points[1]);
+
+ /* shrink polygon in size by 0.5 * blotdiameter */
+ vector<Offset> shrunk_points;
+ shrunk_points.resize (points.size ());
+ bool ccw = 1; // true, if three adjacent points are counterclockwise ordered
+ for (vsize i = 0; i < points.size (); i++)
{
- Molecule r = fm->find_by_name ("accordion-accBayanbase");
- m.add_molecule(r);
- if (reg.left_str(1) == "T")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 2.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
- /* include 4' reed just for completeness. You don't want to use this. */
- if (reg.left_str(1) == "F")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 1.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
- if (reg.left_str(2) == "EE")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 0.5 PT, Y_AXIS);
- d.translate_axis(0.4 * staff_space PT, X_AXIS);
- m.add_molecule(d);
- d.translate_axis(-0.8 * staff_space PT, X_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-2);
- }
- if (reg.left_str(1) == "E")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 0.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
+ int i0 = i;
+ int i1 = (i + 1) % points.size ();
+ int i2 = (i + 2) % points.size ();
+ Offset p0 = points[i0];
+ Offset p1 = points[i1];
+ Offset p2 = points[i2];
+ Offset p10 = p0 - p1;
+ Offset p12 = p2 - p1;
+ if (p10.length () != 0.0)
+ {
+ // recompute ccw
+ Real phi = p10.arg ();
+ // rotate (p2 - p0) by (-phi)
+ Offset q = complex_multiply (p2 - p0, complex_exp (Offset (1.0, -phi)));
+
+ if (q[Y_AXIS] > 0)
+ ccw = 1;
+ else if (q[Y_AXIS] < 0)
+ ccw = 0;
+ else {} // keep ccw unchanged
+ }
+ else {} // keep ccw unchanged
+ Offset p10n = (1.0 / p10.length ()) * p10; // normalize length to 1.0
+ Offset p12n = (1.0 / p12.length ()) * p12;
+ Offset p13n = 0.5 * (p10n + p12n);
+ Offset p14n = 0.5 * (p10n - p12n);
+ Offset p13;
+ Real d = p13n.length () * p14n.length (); // distance p3n to line (p1..p0)
+ if (d < epsilon)
+ // special case: p0, p1, p2 are on a single line => build
+ // vector orthogonal to (p2-p0) of length 0.5 blotdiameter
+ {
+ p13[X_AXIS] = p10[Y_AXIS];
+ p13[Y_AXIS] = -p10[X_AXIS];
+ p13 = (0.5 * blotdiameter / p13.length ()) * p13;
+ }
+ else
+ p13 = (0.5 * blotdiameter / d) * p13n;
+ shrunk_points[i1] = p1 + ((ccw) ? p13 : -p13);
}
- else if (sym == "Stdbase")
+
+ /* build scm expression and bounding box */
+ SCM shrunk_points_scm = SCM_EOL;
+ Box box;
+ for (vsize i = 0; i < shrunk_points.size (); i++)
{
- Molecule r = fm->find_by_name ("accordion-accStdbase");
- m.add_molecule(r);
- if (reg.left_str(1) == "T")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 3.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
- if (reg.left_str(1) == "F")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 2.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
- if (reg.left_str(1) == "M")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 2 PT, Y_AXIS);
- d.translate_axis(staff_space PT, X_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
- if (reg.left_str(1) == "E")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 1.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
- if (reg.left_str(1) == "S")
- {
- Molecule d = fm->find_by_name ("accordion-accDot");
- d.translate_axis(staff_space * 0.5 PT, Y_AXIS);
- m.add_molecule(d);
- reg = reg.right_str(reg.length_i()-1);
- }
+ SCM x = scm_from_double (shrunk_points[i][X_AXIS]);
+ SCM y = scm_from_double (shrunk_points[i][Y_AXIS]);
+ shrunk_points_scm = scm_cons (x, scm_cons (y, shrunk_points_scm));
+ box.add_point (points[i]);
}
- /* ugh maybe try to use regular font for S.B. and B.B and only use one font
- for the rectangle */
- else if (sym == "SB")
+ SCM polygon_scm = scm_list_n (ly_symbol2scm ("polygon"),
+ ly_quote_scm (shrunk_points_scm),
+ scm_from_double (blotdiameter),
+ SCM_BOOL_T,
+ SCM_UNDEFINED);
+
+ Stencil polygon = Stencil (box, polygon_scm);
+ shrunk_points.clear ();
+ return polygon;
+}
+
+/*
+ TODO: deprecate?
+*/
+Stencil
+Lookup::frame (Box b, Real thick, Real blot)
+{
+ Stencil m;
+ for (Axis a = X_AXIS; a < NO_AXES; a = Axis (a + 1))
{
- Molecule r = fm->find_by_name ("accordion-accSB");
- m.add_molecule(r);
+ Axis o = Axis ((a + 1) % NO_AXES);
+ for (LEFT_and_RIGHT (d))
+ {
+ Box edges;
+ edges[a] = b[a][d] + 0.5 * thick * Interval (-1, 1);
+ edges[o][DOWN] = b[o][DOWN] - thick / 2;
+ edges[o][UP] = b[o][UP] + thick / 2;
+
+ m.add_stencil (round_filled_box (edges, blot));
+ }
}
- else if (sym == "BB")
+ return m;
+}
+
+/*
+ Make a smooth curve along the points
+*/
+Stencil
+Lookup::slur (Bezier curve, Real curvethick, Real linethick,
+ SCM dash_details)
+{
+ Stencil return_value;
+
+ /*
+ calculate the offset for the two beziers that make the sandwich
+ for the slur
+ */
+ Real alpha = (curve.control_[3] - curve.control_[0]).arg ();
+ Bezier back = curve;
+ Offset perp = curvethick * complex_exp (Offset (0, alpha + M_PI / 2)) * 0.5;
+ back.control_[1] += perp;
+ back.control_[2] += perp;
+
+ curve.control_[1] -= perp;
+ curve.control_[2] -= perp;
+
+ if (!scm_is_pair (dash_details))
{
- Molecule r = fm->find_by_name ("accordion-accBB");
- m.add_molecule(r);
+ /* solid slur */
+ return_value = bezier_sandwich (back, curve, linethick);
}
- else if (sym == "OldEE")
+ else
{
- Molecule r = fm->find_by_name ("accordion-accOldEE");
- m.add_molecule(r);
+ /* dashed or combination slur */
+ int num_segments = scm_to_int (scm_length (dash_details));
+ for (int i = 0; i < num_segments; i++)
+ {
+ SCM dash_pattern = scm_list_ref (dash_details, scm_from_int (i));
+ Real t_min = robust_scm2double (scm_car (dash_pattern), 0);
+ Real t_max = robust_scm2double (scm_cadr (dash_pattern), 1.0);
+ Real dash_fraction
+ = robust_scm2double (scm_caddr (dash_pattern), 1.0);
+ Real dash_period
+ = robust_scm2double (scm_cadddr (dash_pattern), 0.75);
+ Bezier back_segment = back.extract (t_min, t_max);
+ Bezier curve_segment = curve.extract (t_min, t_max);
+ if (dash_fraction == 1.0)
+ return_value.add_stencil (bezier_sandwich (back_segment,
+ curve_segment,
+ linethick));
+ else
+ {
+ Bezier back_dash, curve_dash;
+ Real seg_length = (back_segment.control_[3]
+ - back_segment.control_[0]).length ();
+ int pattern_count = (int) (seg_length / dash_period);
+ Real pattern_length = 1.0 / (pattern_count + dash_fraction);
+ Real start_t, end_t;
+ for (int p = 0; p <= pattern_count; p++)
+ {
+ start_t = p * pattern_length;
+ end_t = (p + dash_fraction) * pattern_length;
+ back_dash
+ = back_segment.extract (start_t, end_t);
+ curve_dash
+ = curve_segment.extract (start_t, end_t);
+ return_value.add_stencil (bezier_sandwich (back_dash,
+ curve_dash,
+ linethick));
+ }
+ }
+ }
}
- else if (sym == "OldEES")
+ return return_value;
+}
+
+/*
+ * Bezier Sandwich:
+ *
+ * .|
+ * . |
+ * top . |
+ * . curve |
+ * . |
+ * . |
+ * . |
+ * | |
+ * | .|
+ * | .
+ * | bottom .
+ * | . curve
+ * | .
+ * | .
+ * | .
+ * | .
+ * |.
+ * |
+ *
+ */
+Stencil
+Lookup::bezier_sandwich (Bezier top_curve, Bezier bottom_curve, Real thickness)
+{
+ SCM commands = scm_list_n (ly_symbol2scm ("moveto"),
+ scm_from_double (top_curve.control_[0][X_AXIS]),
+ scm_from_double (top_curve.control_[0][Y_AXIS]),
+ ly_symbol2scm ("curveto"),
+ scm_from_double (top_curve.control_[1][X_AXIS]),
+ scm_from_double (top_curve.control_[1][Y_AXIS]),
+ scm_from_double (top_curve.control_[2][X_AXIS]),
+ scm_from_double (top_curve.control_[2][Y_AXIS]),
+ scm_from_double (top_curve.control_[3][X_AXIS]),
+ scm_from_double (top_curve.control_[3][Y_AXIS]),
+ ly_symbol2scm ("lineto"),
+ scm_from_double (bottom_curve.control_[3][X_AXIS]),
+ scm_from_double (bottom_curve.control_[3][Y_AXIS]),
+ ly_symbol2scm ("curveto"),
+ scm_from_double (bottom_curve.control_[2][X_AXIS]),
+ scm_from_double (bottom_curve.control_[2][Y_AXIS]),
+ scm_from_double (bottom_curve.control_[1][X_AXIS]),
+ scm_from_double (bottom_curve.control_[1][Y_AXIS]),
+ scm_from_double (bottom_curve.control_[0][X_AXIS]),
+ scm_from_double (bottom_curve.control_[0][Y_AXIS]),
+ ly_symbol2scm ("closepath"),
+ SCM_UNDEFINED);
+
+ SCM horizontal_bend = scm_list_n (ly_symbol2scm ("path"),
+ scm_from_double (thickness),
+ ly_quote_scm (commands),
+ ly_quote_scm (ly_symbol2scm ("round")),
+ ly_quote_scm (ly_symbol2scm ("round")),
+ SCM_BOOL_T,
+ SCM_UNDEFINED);
+
+ Interval x_extent = top_curve.extent (X_AXIS);
+ x_extent.unite (bottom_curve.extent (X_AXIS));
+ Interval y_extent = top_curve.extent (Y_AXIS);
+ y_extent.unite (bottom_curve.extent (Y_AXIS));
+ Box b (x_extent, y_extent);
+
+ b.widen (0.5 * thickness, 0.5 * thickness);
+ return Stencil (b, horizontal_bend);
+}
+
+Stencil
+Lookup::repeat_slash (Real w, Real s, Real t)
+{
+
+ Real x_width = sqrt ((t * t) + ((t / s) * (t / s)));
+ Real height = w * s;
+
+ SCM controls = scm_list_n (ly_symbol2scm ("moveto"),
+ scm_from_double (0),
+ scm_from_double (0),
+ ly_symbol2scm ("rlineto"),
+ scm_from_double (x_width),
+ scm_from_double (0),
+ ly_symbol2scm ("rlineto"),
+ scm_from_double (w),
+ scm_from_double (height),
+ ly_symbol2scm ("rlineto"),
+ scm_from_double (-x_width),
+ scm_from_double (0),
+ ly_symbol2scm ("closepath"),
+ SCM_UNDEFINED);
+
+ SCM slashnodot = scm_list_n (ly_symbol2scm ("path"),
+ scm_from_double (0),
+ ly_quote_scm (controls),
+ ly_quote_scm (ly_symbol2scm ("round")),
+ ly_quote_scm (ly_symbol2scm ("round")),
+ SCM_BOOL_T,
+ SCM_UNDEFINED);
+
+ Box b (Interval (0, w + sqrt (sqr (t / s) + sqr (t))),
+ Interval (0, w * s));
+
+ return Stencil (b, slashnodot); // http://slashnodot.org
+}
+
+Stencil
+Lookup::bracket (Axis a, Interval iv, Real thick, Real protrude, Real blot)
+{
+ Box b;
+ Axis other = Axis ((a + 1) % 2);
+ b[a] = iv;
+ b[other] = Interval (-1, 1) * thick * 0.5;
+
+ Stencil m = round_filled_box (b, blot);
+
+ b[a] = Interval (iv[UP] - thick, iv[UP]);
+ Interval oi = Interval (-thick / 2, thick / 2 + fabs (protrude));
+ oi *= sign (protrude);
+ b[other] = oi;
+ m.add_stencil (round_filled_box (b, blot));
+ b[a] = Interval (iv[DOWN], iv[DOWN] + thick);
+ m.add_stencil (round_filled_box (b, blot));
+
+ return m;
+}
+
+Stencil
+Lookup::triangle (Interval iv, Real thick, Real protrude)
+{
+ Box b;
+ b[X_AXIS] = Interval (0, iv.length ());
+ b[Y_AXIS] = Interval (min (0., protrude), max (0.0, protrude));
+
+ vector<Offset> points;
+ points.push_back (Offset (iv[LEFT], 0));
+ points.push_back (Offset (iv[RIGHT], 0));
+ points.push_back (Offset (iv.center (), protrude));
+ points.push_back (Offset (iv[LEFT], 0)); // close triangle
+
+ return points_to_line_stencil (thick, points);
+
+}
+
+Stencil
+Lookup::points_to_line_stencil (Real thick, vector<Offset> const &points)
+{
+ Stencil ret;
+ for (vsize i = 1; i < points.size (); i++)
{
- Molecule r = fm->find_by_name ("accordion-accOldEES");
- m.add_molecule(r);
+ if (points[i - 1].is_sane () && points[i].is_sane ())
+ {
+ Stencil line
+ = Line_interface::make_line (thick, points[i - 1], points[i]);
+ ret.add_stencil (line);
+ }
}
- return m;
+ return ret;
}
-
projects / lilypond.git / blobdiff