source file of the GNU LilyPond music typesetter
- (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
#include "molecule.hh"
#include "lookup.hh"
#include "font-metric.hh"
+#include "interval.hh"
+
+Molecule
+Lookup::dot (Offset p, Real radius)
+{
+ SCM at = (scm_list_n (ly_symbol2scm ("dot"),
+ gh_double2scm (p[X_AXIS]),
+ gh_double2scm (p[Y_AXIS]),
+ gh_double2scm (radius),
+ SCM_UNDEFINED));
+ Box box;
+ box.add_point (p - Offset (radius, radius));
+ box.add_point (p + Offset (radius, radius));
+ return Molecule (box, at);
+}
Molecule
Lookup::beam (Real slope, Real width, Real thick)
return Molecule (b, at);
}
-
-
Molecule
Lookup::dashed_slur (Bezier b, Real thick, Real dash)
{
return Molecule (box, at);
}
+Molecule
+Lookup::line (Real th, Offset from, Offset to)
+{
+ SCM at = scm_list_n (ly_symbol2scm ("draw-line"),
+ gh_double2scm (th),
+ gh_double2scm (from[X_AXIS]),
+ gh_double2scm (from[Y_AXIS]),
+ gh_double2scm (to[X_AXIS]),
+ gh_double2scm (to[Y_AXIS]),
+ SCM_UNDEFINED);
+
+ Box box;
+ box.add_point (from);
+ box.add_point (to);
+
+ box[X_AXIS].widen (th/2);
+ box[Y_AXIS].widen (th/2);
+
+ return Molecule (box, at);
+}
+
+Molecule
+Lookup::dashed_line (Real thick, Offset from, Offset to,
+ Real dash_period, Real dash_fraction)
+{
+ dash_fraction = (dash_fraction >? 0) <? 1.0;
+ Real on = dash_fraction * dash_period + thick;
+ Real off = dash_period - on;
+
+ SCM at = scm_list_n (ly_symbol2scm ("dashed-line"),
+ gh_double2scm (thick),
+ gh_double2scm (on),
+ gh_double2scm (off),
+ gh_double2scm (to[X_AXIS] - from[X_AXIS]),
+ gh_double2scm (to[Y_AXIS] - from[Y_AXIS]),
+ SCM_UNDEFINED);
+
+ Box box;
+ box.add_point (Offset (0,0));
+ box.add_point (to - from);
+
+ box[X_AXIS].widen (thick/2);
+ box[Y_AXIS].widen (thick/2);
+
+ Molecule m = Molecule (box, at);
+ m.translate (from);
+ return m;
+}
+
+Molecule
+Lookup::horizontal_line (Interval w, Real th)
+{
+ SCM at = scm_list_n (ly_symbol2scm ("horizontal-line"),
+ gh_double2scm (w[LEFT]),
+ gh_double2scm (w[RIGHT]),
+ gh_double2scm (th),
+ SCM_UNDEFINED);
+
+
+ Box box ;
+ box[X_AXIS] = w;
+ box[Y_AXIS] = Interval (-th/2,th/2);
+ return Molecule (box, at);
+}
Molecule
Lookup::blank (Box b)
{
- return Molecule (b, SCM_EOL);
+ return Molecule (b, scm_makfrom0str (""));
}
-
Molecule
Lookup::filledbox (Box b)
{
return Molecule (b,at);
}
+/*
+ * round filled box:
+ *
+ * __________________________________
+ * / \ ^ / \ ^
+ * | |blot | |
+ * | | |dia | | |
+ * | |meter | |
+ * |\ _ _ / v \ _ _ /| |
+ * | | |
+ * | | | Box
+ * | <------>| | extent
+ * | blot | | (Y_AXIS)
+ * | diameter| |
+ * | | |
+ * | _ _ _ _ | |
+ * |/ \ / \| |
+ * | | |
+ * | | | | |
+ * | | |
+ * x\_____/______________\_____/|_____v
+ * |(0,0) |
+ * | |
+ * | |
+ * |<-------------------------->|
+ * Box extent(X_AXIS)
+ */
+Molecule
+Lookup::round_filled_box (Box b, Real blotdiameter)
+{
+ if (b.x ().length () < blotdiameter)
+ {
+ programming_error (_f ("round filled box horizontal extent smaller than blot; decreasing blot"));
+ blotdiameter = b.x ().length ();
+ }
+ if (b.y ().length () < blotdiameter)
+ {
+ programming_error (_f ("round filled box vertical extent smaller than blot; decreasing blot"));
+ blotdiameter = b.y ().length ();
+ }
+
+ SCM at = (scm_list_n (ly_symbol2scm ("round-filled-box"),
+ gh_double2scm (-b[X_AXIS][LEFT]),
+ gh_double2scm (b[X_AXIS][RIGHT]),
+ gh_double2scm (-b[Y_AXIS][DOWN]),
+ gh_double2scm (b[Y_AXIS][UP]),
+ gh_double2scm (blotdiameter),
+ SCM_UNDEFINED));
+
+ return Molecule (b,at);
+}
+
+
+
+/*
+ * Create Molecule 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
+ */
+Molecule
+Lookup::round_filled_polygon (Array<Offset> points, Real blotdiameter)
+{
+ /* TODO: Maybe print a warning if one of the above limitations
+ applies to the given polygon. However, this is quite complicated
+ to check. */
+
+ /* remove consecutive duplicate points */
+ const Real epsilon = 0.01;
+ for (int i = 0; i < points.size ();)
+ {
+ int next_i = (i + 1) % points.size ();
+ Real d = (points[i] - points[next_i]).length ();
+ if (d < epsilon)
+ points.del (next_i);
+ else
+ i++;
+ }
+
+ /* special cases: degenerated polygons */
+ if (points.size () == 0)
+ return Molecule ();
+ if (points.size () == 1)
+ return dot (points[0], 0.5 * blotdiameter);
+ if (points.size () == 2)
+ return line (blotdiameter, points[0], points[1]);
+
+ /* shrink polygon in size by 0.5 * blotdiameter */
+ Array<Offset> shrinked_points;
+ shrinked_points.set_size (points.size ());
+ bool ccw = 1; // true, if three adjacent points are counterclockwise ordered
+ for (int i = 0; i < points.size (); i++)
+ {
+ 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;
+ shrinked_points[i1] = p1 + ((ccw) ? p13 : -p13);
+ }
+
+ /* build scm expression and bounding box */
+ SCM shrinked_points_scm = SCM_EOL;
+ Box box;
+ for (int i = 0; i < shrinked_points.size (); i++)
+ {
+ SCM x = gh_double2scm (shrinked_points[i][X_AXIS]);
+ SCM y = gh_double2scm (shrinked_points[i][Y_AXIS]);
+ shrinked_points_scm = gh_cons (x, gh_cons (y, shrinked_points_scm));
+ box.add_point (points[i]);
+ }
+ SCM polygon_scm = scm_list_n (ly_symbol2scm ("polygon"),
+ ly_quote_scm (shrinked_points_scm),
+ gh_double2scm (blotdiameter),
+ SCM_UNDEFINED);
+
+ Molecule polygon = Molecule (box, polygon_scm);
+ shrinked_points.clear ();
+ return polygon;
+}
+
Molecule
Lookup::frame (Box b, Real thick)
{
Molecule m;
Direction d = LEFT;
- Axis a = X_AXIS;
- while (a < NO_AXES)
+ for (Axis a = X_AXIS; a < NO_AXES; a = Axis (a + 1))
{
+ Axis o = Axis ((a+1)%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);
}
-
/*
Make a smooth curve along the points
*/
return Molecule (b, at);
}
+/*
+ * Bezier Sandwich:
+ *
+ * .|
+ * . |
+ * top . |
+ * . curve |
+ * . |
+ * . |
+ * . |
+ * | |
+ * | .|
+ * | .
+ * | bottom .
+ * | . curve
+ * | .
+ * | .
+ * | .
+ * | .
+ * |.
+ * |
+ *
+ */
+Molecule
+Lookup::bezier_sandwich (Bezier top_curve, Bezier bottom_curve)
+{
+ /*
+ Need the weird order b.o. the way PS want its arguments
+ */
+ SCM list = SCM_EOL;
+ list = gh_cons (ly_offset2scm (bottom_curve.control_[3]), list);
+ list = gh_cons (ly_offset2scm (bottom_curve.control_[0]), list);
+ list = gh_cons (ly_offset2scm (bottom_curve.control_[1]), list);
+ list = gh_cons (ly_offset2scm (bottom_curve.control_[2]), list);
+ list = gh_cons (ly_offset2scm (top_curve.control_[0]), list);
+ list = gh_cons (ly_offset2scm (top_curve.control_[3]), list);
+ list = gh_cons (ly_offset2scm (top_curve.control_[2]), list);
+ list = gh_cons (ly_offset2scm (top_curve.control_[1]), list);
+
+ SCM horizontal_bend = scm_list_n (ly_symbol2scm ("bezier-sandwich"),
+ ly_quote_scm (list),
+ gh_double2scm (0.0),
+ 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);
+
+ return Molecule (b, horizontal_bend);
+}
+
+/*
+ * Horizontal Slope:
+ *
+ * /| ^
+ * / | |
+ * / | | height
+ * / | |
+ * / | v
+ * | /
+ * | /
+ * (0,0) x /slope=dy/dx
+ * | /
+ * |/
+ *
+ * <----->
+ * width
+ */
+Molecule
+Lookup::horizontal_slope (Real width, Real slope, Real height)
+{
+ SCM width_scm = gh_double2scm (width);
+ SCM slope_scm = gh_double2scm (slope);
+ SCM height_scm = gh_double2scm (height);
+ SCM horizontal_slope = scm_list_n (ly_symbol2scm ("beam"),
+ width_scm, slope_scm,
+ height_scm, SCM_UNDEFINED);
+ Box b (Interval (0, width),
+ Interval (-height/2, height/2 + width*slope));
+ return Molecule (b, horizontal_slope);
+}
+
+/*
+ TODO: junk me.
+ */
Molecule
Lookup::accordion (SCM s, Real staff_space, Font_metric *fm)
{
{
Molecule r = fm->find_by_name ("accordion-accDiscant");
m.add_molecule (r);
- if (reg.left_str (1) == "F")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
int eflag = 0x00;
- if (reg.left_str (3) == "EEE")
+ if (reg.left_string (3) == "EEE")
{
eflag = 0x07;
- reg = reg.right_str (reg.length_i ()-3);
+ reg = reg.right_string (reg.length ()-3);
}
- else if (reg.left_str (2) == "EE")
+ else if (reg.left_string (2) == "EE")
{
eflag = 0x05;
- reg = reg.right_str (reg.length_i ()-2);
+ reg = reg.right_string (reg.length ()-2);
}
- else if (reg.left_str (2) == "Eh")
+ else if (reg.left_string (2) == "Eh")
{
eflag = 0x04;
- reg = reg.right_str (reg.length_i ()-2);
+ reg = reg.right_string (reg.length ()-2);
}
- else if (reg.left_str (1) == "E")
+ else if (reg.left_string (1) == "E")
{
eflag = 0x02;
- reg = reg.right_str (reg.length_i ()-1);
+ reg = reg.right_string (reg.length ()-1);
}
if (eflag & 0x02)
{
d.translate_axis (-0.8 * staff_space PT, X_AXIS);
m.add_molecule (d);
}
- if (reg.left_str (2) == "SS")
+ if (reg.left_string (2) == "SS")
{
Molecule d = fm->find_by_name ("accordion-accDot");
d.translate_axis (0.5 * staff_space PT, Y_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);
+ reg = reg.right_string (reg.length ()-2);
}
- if (reg.left_str (1) == "S")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
}
else if (sym == "Freebase")
{
Molecule r = fm->find_by_name ("accordion-accFreebase");
m.add_molecule (r);
- if (reg.left_str (1) == "F")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
if (reg == "E")
{
{
Molecule r = fm->find_by_name ("accordion-accBayanbase");
m.add_molecule (r);
- if (reg.left_str (1) == "T")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
/* include 4' reed just for completeness. You don't want to use this. */
- if (reg.left_str (1) == "F")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
- if (reg.left_str (2) == "EE")
+ if (reg.left_string (2) == "EE")
{
Molecule d = fm->find_by_name ("accordion-accDot");
d.translate_axis (staff_space * 0.5 PT, Y_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);
+ reg = reg.right_string (reg.length ()-2);
}
- if (reg.left_str (1) == "E")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
}
else if (sym == "Stdbase")
{
Molecule r = fm->find_by_name ("accordion-accStdbase");
m.add_molecule (r);
- if (reg.left_str (1) == "T")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
- if (reg.left_str (1) == "F")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
- if (reg.left_str (1) == "M")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
- if (reg.left_str (1) == "E")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
- if (reg.left_str (1) == "S")
+ if (reg.left_string (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);
+ reg = reg.right_string (reg.length ()-1);
}
}
/* ugh maybe try to use regular font for S.B. and B.B and only use one font
return m;
}
-/*
- TODO: should use slope instead? Angle gives nasty rad <-> degree
- conversions.
-*/
Molecule
Lookup::repeat_slash (Real w, Real s, Real t)
{
return Molecule (b, slashnodot); // http://slashnodot.org
}
+
+Molecule
+Lookup::bracket (Axis a, Interval iv, Real thick, Real protude)
+{
+ Box b;
+ Axis other = Axis((a+1)%2);
+ b[a] = iv;
+ b[other] = Interval(-1, 1) * thick * 0.5;
+
+ Molecule m = filledbox (b);
+
+ b[a] = Interval (iv[UP] - thick, iv[UP]);
+ Interval oi = Interval (-thick/2, thick/2 + fabs (protude)) ;
+ oi *= sign (protude);
+ b[other] = oi;
+ m.add_molecule (filledbox (b));
+ b[a] = Interval (iv[DOWN], iv[DOWN] +thick);
+ m.add_molecule (filledbox(b));
+
+ return m;
+}
+
+Molecule
+Lookup::triangle (Interval iv, Real thick, Real protude)
+{
+ Box b ;
+ b[X_AXIS] = iv;
+ b[Y_AXIS] = Interval (0 <? protude , 0 >? protude);
+
+ SCM s = scm_list_n (ly_symbol2scm ("symmetric-x-triangle"),
+ gh_double2scm (thick),
+ gh_double2scm (iv.length()),
+ gh_double2scm (protude), SCM_UNDEFINED);
+
+ return Molecule (b, s);
+}
+
+
+/*
+ TODO: use rounded boxes.
+ */
+LY_DEFINE(ly_bracket ,"ly:bracket",
+ 4, 0, 0,
+ (SCM a, SCM iv, SCM t, SCM p),
+ "Make a bracket in direction @var{a}. The extent of the bracket is "
+ "given by @var{iv}. The wings protude by an amount of @var{p}, which "
+ "may be negative. The thickness is given by @var{t}.")
+{
+ SCM_ASSERT_TYPE(is_axis (a), a, SCM_ARG1, __FUNCTION__, "axis") ;
+ SCM_ASSERT_TYPE(is_number_pair (iv), iv, SCM_ARG2, __FUNCTION__, "number pair") ;
+ SCM_ASSERT_TYPE(gh_number_p (t), a, SCM_ARG3, __FUNCTION__, "number") ;
+ SCM_ASSERT_TYPE(gh_number_p (p), a, SCM_ARG4, __FUNCTION__, "number") ;
+
+
+ return Lookup::bracket ((Axis)gh_scm2int (a), ly_scm2interval (iv),
+ gh_scm2double (t),
+ gh_scm2double (p)).smobbed_copy ();
+}
+
+
+
+LY_DEFINE(ly_filled_box ,"ly:round-filled-box",
+ 3, 0, 0,
+ (SCM xext, SCM yext, SCM blot),
+ "Make a filled-box of dimensions @var{xext}, @var{yext} and roundness @var{blot}.")
+{
+ SCM_ASSERT_TYPE(is_number_pair (xext), xext, SCM_ARG1, __FUNCTION__, "number pair") ;
+ SCM_ASSERT_TYPE(is_number_pair (yext), yext, SCM_ARG2, __FUNCTION__, "number pair") ;
+ SCM_ASSERT_TYPE(gh_number_p (blot), blot, SCM_ARG3, __FUNCTION__, "number") ;
+
+ return Lookup::round_filled_box (Box (ly_scm2interval (xext), ly_scm2interval (yext)),
+ gh_scm2double (blot)).smobbed_copy ();
+}
+
projects / lilypond.git / blobdiff