+Molecule
+Lookup::repeat_slash (Real w, Real s, Real t)
+{
+ SCM wid = gh_double2scm (w);
+ SCM sl = gh_double2scm (s);
+ SCM thick = gh_double2scm (t);
+ SCM slashnodot = scm_list_n (ly_symbol2scm ("repeat-slash"),
+ wid, sl, thick, SCM_UNDEFINED);
+
+ Box b (Interval (0, w + sqrt (sqr(t/s) + sqr (t))),
+ Interval (0, w * s));
+
+ 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 ();
+}
+