X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fslur.cc;h=bade56d2e36438cc51cb7ddeb81951bf3340cbeb;hb=1f0d3e5ed0e3b1f0a21a7d64e5b9c7e27bba4f5a;hp=425a3b8809f411a9dc2c78fb1e0931f906efe2ab;hpb=f9a3a6ccb7cab73028819954312508f1bdb2dfff;p=lilypond.git diff --git a/lily/slur.cc b/lily/slur.cc index 425a3b8809..bade56d2e3 100644 --- a/lily/slur.cc +++ b/lily/slur.cc @@ -3,18 +3,22 @@ source file of the GNU LilyPond music typesetter - (c) 1996--2000 Han-Wen Nienhuys + (c) 1996--2002 Han-Wen Nienhuys Jan Nieuwenhuizen */ /* [TODO] - * fix broken interstaff slurs + * should avoid stafflines with horizontal part. + * begin and end should be treated as a/acknowledge Scripts. + * smart changing of endings + * smart changing of (Y-?)offsets to avoid ugly beziers - (along-side-stem) + (along-side-stem) + */ #include "directional-element-interface.hh" @@ -26,7 +30,7 @@ #include "stem.hh" #include "paper-column.hh" #include "molecule.hh" -#include "debug.hh" +#include "warn.hh" #include "slur-bezier-bow.hh" #include "main.hh" #include "group-interface.hh" @@ -37,23 +41,21 @@ void Slur::set_interface (Grob*me) { - /* Ugh, junked this function, but if we don't do this, we somehow - won't be able to write to it */ - me->set_grob_property ("attachment", me->get_grob_property ("attachment")); + /* Copy to mutable list. */ + me->set_grob_property ("attachment", + ly_deep_copy (me->get_grob_property ("attachment"))); } void Slur::add_column (Grob*me, Grob*n) { if (!gh_pair_p (n->get_grob_property ("note-heads"))) - warning (_ ("Putting slur over rest. Ignoring.")); - else - { - Pointer_group_interface::add_element (me, "note-columns",n); - me->add_dependency (n); - } + me->warning (_ ("Putting slur over rest.")); + + Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-columns"), n); + me->add_dependency (n); - add_bound_item (dynamic_cast (me), dynamic_cast(n)); + add_bound_item (dynamic_cast (me), dynamic_cast (n)); } void @@ -63,16 +65,16 @@ Slur::de_uglyfy (Grob*me, Slur_bezier_bow* bb, Real default_height) Real ff = bb->fit_factor (); for (int i = 1; i < 3; i++) { - Real ind = abs (bb->curve_.control_[(i-1)*3][X_AXIS] + Real ind = abs (bb->curve_.control_[ (i-1)*3][X_AXIS] - bb->curve_.control_[i][X_AXIS]) / length; Real h = bb->curve_.control_[i][Y_AXIS] * ff / length; Real f = default_height / length; SCM up = me->get_grob_property ("de-uglify-parameters"); - Real c1 = gh_scm2double (gh_car (up)); - Real c2 = gh_scm2double (gh_cadr (up)); - Real c3 = gh_scm2double (gh_caddr (up)); + Real c1 = gh_scm2double (ly_car (up)); + Real c2 = gh_scm2double (ly_cadr (up)); + Real c3 = gh_scm2double (ly_caddr (up)); if (h > c1 * f) { @@ -89,16 +91,18 @@ Slur::de_uglyfy (Grob*me, Slur_bezier_bow* bb, Real default_height) bb->curve_.assert_sanity (); } + + Direction Slur::get_default_dir (Grob*me) { - Link_array encompass_arr = - Pointer_group_interface__extract_elements (me, (Grob*)0, "note-columns"); + Link_array encompasses = + Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-columns"); Direction d = DOWN; - for (int i=0; i < encompass_arr.size (); i ++) + for (int i=0; i < encompasses.size (); i ++) { - if (Note_column::dir (encompass_arr[i]) < 0) + if (Note_column::dir (encompasses[i]) < 0) { d = UP; break; @@ -127,13 +131,14 @@ Slur::after_line_breaking (SCM smob) void Slur::check_slope (Grob *me) { + /* Avoid too steep slurs. */ SCM s = me->get_grob_property ("slope-limit"); if (gh_number_p (s)) { - Array encompass = get_encompass_offset_arr (me); + Array encompass = get_encompass_offsets (me); Drul_array attachment; attachment[LEFT] = encompass[0]; attachment[RIGHT] = encompass.top (); @@ -151,40 +156,57 @@ Slur::check_slope (Grob *me) { Real staff_space = Staff_symbol_referencer::staff_space ((Grob*)me); Direction dir = (Direction)gh_scm2int (me->get_grob_property ("direction")); - Direction d = (Direction)(- dir * (sign (dy))); + Direction d = (Direction) (- dir * (sign (dy))); SCM a = me->get_grob_property ("attachment-offset"); Drul_array o; - o[LEFT] = ly_scm2offset (index_cell (a, LEFT)); - o[RIGHT] = ly_scm2offset (index_cell (a, RIGHT)); + o[LEFT] = ly_scm2offset (index_get_cell (a, LEFT)); + o[RIGHT] = ly_scm2offset (index_get_cell (a, RIGHT)); o[d][Y_AXIS] -= (limit - slope) * dx * dir / staff_space; - //o[d][Y_AXIS] = attachment[-d][Y_AXIS] + (dx * limit * dir / staff_space); + + o[d][Y_AXIS] *= Directional_element_interface::get (me); + me->set_grob_property ("attachment-offset", gh_cons (ly_offset2scm (o[LEFT]), ly_offset2scm (o[RIGHT]))); } } + } -void +/* + Set 'attachment grob property, and return it. +*/ +SCM Slur::set_extremities (Grob *me) { if (!Directional_element_interface::get (me)) Directional_element_interface::set (me, get_default_dir (me)); + SCM att = me->get_grob_property ("attachment"); + /* + */ + if (!gh_pair_p (att)) + { + programming_error ("attachment is not a cons?!"); + att = gh_cons (SCM_EOL, SCM_EOL); + me->set_grob_property ("attachment", att); + } + Direction dir = LEFT; do { - if (!gh_symbol_p (index_cell (me->get_grob_property ("attachment"), dir))) + + if (!gh_symbol_p (index_get_cell (att, dir))) { for (SCM s = me->get_grob_property ("extremity-rules"); - s != SCM_EOL; s = gh_cdr (s)) + s != SCM_EOL; s = ly_cdr (s)) { - SCM r = gh_call2 (gh_caar (s), me->self_scm (), + SCM r = gh_call2 (ly_caar (s), me->self_scm (), gh_int2scm ((int)dir)); if (r != SCM_BOOL_F) { - index_set_cell (me->get_grob_property ("attachment"), dir, - gh_cdar (s)); + index_set_cell (att, dir, + ly_cdar (s)); break; } } @@ -193,18 +215,27 @@ Slur::set_extremities (Grob *me) while (flip (&dir) != LEFT); check_slope (me); + + return att; } Real Slur::get_first_notecolumn_y (Grob *me, Direction dir) { - Grob *col = dir == LEFT - ? unsmob_grob (gh_car (scm_reverse (me->get_grob_property - ("note-columns")))) - : unsmob_grob - (gh_car (me->get_grob_property ("note-columns"))); + SCM cols = me->get_grob_property ("note-columns"); + + if(!gh_pair_p (cols)) + { + programming_error ("No note-columns in slur?"); + me->suicide (); + return 0.0; + } + + if (dir == LEFT) + cols = scm_reverse(cols); + Grob *col = unsmob_grob (ly_car (cols)); Grob *common[] = { 0, @@ -231,15 +262,15 @@ Slur::broken_trend_offset (Grob *me, Direction dir) the unbroken slur would have had. */ Offset o; - if (Spanner *mother = dynamic_cast (me->original_l_)) + if (Spanner *mother = dynamic_cast (me->original_)) { - for (int i = dir == LEFT ? 0 : mother->broken_into_l_arr_.size () - 1; - dir == LEFT ? i < mother->broken_into_l_arr_.size () : i > 0; + for (int i = dir == LEFT ? 0 : mother->broken_intos_.size () - 1; + dir == LEFT ? i < mother->broken_intos_.size () : i > 0; dir == LEFT ? i++ : i--) { - if (mother->broken_into_l_arr_[i - dir] == me) + if (mother->broken_intos_[i - dir] == me) { - Grob *neighbour = mother->broken_into_l_arr_[i]; + Grob *neighbour = mother->broken_intos_[i]; if (dir == RIGHT) neighbour->set_grob_property ("direction", me->get_grob_property ("direction")); @@ -248,7 +279,7 @@ Slur::broken_trend_offset (Grob *me, Direction dir) int neighbour_cols = scm_ilength (neighbour->get_grob_property ("note-columns")); int cols = scm_ilength (me->get_grob_property ("note-columns")); o = Offset (0, (y*neighbour_cols + neighbour_y*cols) / - (cols + neighbour_cols)); + (cols + neighbour_cols)); break; } } @@ -256,29 +287,41 @@ Slur::broken_trend_offset (Grob *me, Direction dir) return o; } +/* + COMMON is size-2 array with common refpoints. + +UGH: this routine delivers offsets which are *not* relative to COMMON. +*/ Offset Slur::get_attachment (Grob *me, Direction dir, Grob **common) { SCM s = me->get_grob_property ("attachment"); - if (!gh_symbol_p (index_cell (s, dir))) + if (!gh_symbol_p (index_get_cell (s, dir))) { - set_extremities (me); - s = me->get_grob_property ("attachment"); + s = set_extremities (me); } - SCM a = dir == LEFT ? gh_car (s) : gh_cdr (s); - Spanner*sp = dynamic_cast(me); + + SCM a = dir == LEFT ? ly_car (s) : ly_cdr (s); + Spanner*sp = dynamic_cast (me); String str = ly_symbol2string (a); Real staff_space = Staff_symbol_referencer::staff_space ((Grob*)me); Real hs = staff_space / 2.0; Offset o; + int slurdir = gh_scm2int (me->get_grob_property ("direction")); + Grob *stem = 0; if (Note_column::has_interface (sp->get_bound (dir))) { Grob * n =sp->get_bound (dir); - if ((stem = Note_column::stem_l (n))) + if ((stem = Note_column::get_stem (n))) { + Real x_extent; + if (Grob *head = Note_column::first_head (n)) + x_extent = head->extent (head, X_AXIS).length (); + else + x_extent = n->extent (n, X_AXIS).length (); if (str == "head") { @@ -287,18 +330,17 @@ Slur::get_attachment (Grob *me, Direction dir, /* Default position is centered in X, on outer side of head Y */ - o += Offset (0.5 * n->extent (n,X_AXIS).length (), + o += Offset (0.5 * x_extent, 0.5 * staff_space * Directional_element_interface::get (me)); } else if (str == "alongside-stem") { - o = Offset (0, Stem::chord_start_f (stem)); + o = Offset (0, Stem::chord_start_y (stem)); /* Default position is on stem X, on outer side of head Y */ - o += Offset (n->extent (n,X_AXIS).length () - * (1 + Stem::get_direction (stem)), + o += Offset (x_extent * (1 + Stem::get_direction (stem)), 0.5 * staff_space * Directional_element_interface::get (me)); } @@ -308,45 +350,44 @@ Slur::get_attachment (Grob *me, Direction dir, /* Default position is on stem X, at stem end Y */ + Real stem_thickness = + gh_scm2double (stem->get_grob_property ("thickness")) + * stem->get_paper ()->get_var ("linethickness"); o += Offset (0.5 * - (n->extent (n,X_AXIS).length () - - stem->extent (stem,X_AXIS).length ()) - * (1 + Stem::get_direction (stem)), - 0); + x_extent * (1 + Stem::get_direction (stem)) + - ((dir + 1)/2) * stem_thickness + + ((1 - slurdir)/2) * stem_thickness, + 0); } } } - else if (str == "loose-end") + /* + If we're not a note_column, we can't be anything but a loose-end. + But if user has set (attachment . (stem . stem)), our string is + stem, not loose-end. + + Hmm, maybe after-line-breaking should set this to loose-end? */ + else // if (str == "loose-end") { - SCM other_a = dir == LEFT ? gh_cdr (s) : gh_car (s); + SCM other_a = dir == LEFT ? ly_cdr (s) : ly_car (s); if (ly_symbol2string (other_a) != "loose-end") - { -#if 0 - /* - The braindead way: horizontal - */ - o = Offset (0, get_attachment (me, -dir, common)[Y_AXIS]); -#else - o = broken_trend_offset (me, dir); -#endif - - - } - + o = broken_trend_offset (me, dir); } SCM alist = me->get_grob_property ("extremity-offset-alist"); -int stemdir = stem ? Stem::get_direction (stem) : 1; - int slurdir = gh_scm2int (me->get_grob_property ("direction")); + int stemdir = stem ? Stem::get_direction (stem) : 1; SCM l = scm_assoc - (scm_listify (a, - gh_int2scm (stemdir * dir), - gh_int2scm (slurdir * dir), + (scm_list_n (a, + gh_int2scm (stemdir * dir), + gh_int2scm (slurdir * dir), SCM_UNDEFINED), alist); if (l != SCM_BOOL_F) { - o += ly_scm2offset (gh_cdr (l)) * staff_space * dir; + Offset off = ly_scm2offset (ly_cdr (l)) * staff_space; + off[X_AXIS] *= dir; + off[Y_AXIS] *= Directional_element_interface::get (me); + o += off; } /* @@ -359,8 +400,12 @@ int stemdir = stem ? Stem::get_direction (stem) : 1; - me->relative_coordinate (common[Y_AXIS], Y_AXIS); } - o += ly_scm2offset (index_cell (me->get_grob_property ("attachment-offset"), - dir)) * staff_space; + Offset off = ly_scm2offset (index_get_cell (me->get_grob_property + ("attachment-offset"), + dir)) * staff_space; + + off[Y_AXIS] *= Directional_element_interface::get (me); + o += off; return o; } @@ -370,30 +415,34 @@ Slur::encompass_offset (Grob*me, Grob **common) { Offset o; - Grob* stem_l = unsmob_grob (col->get_grob_property ("stem")); + Grob* stem = unsmob_grob (col->get_grob_property ("stem")); Direction dir = Directional_element_interface::get (me); - if (!stem_l) + if (!stem) { - warning (_ ("Slur over rest?")); + me->warning (_ ("Slur over rest?")); o[X_AXIS] = col->relative_coordinate (common[X_AXIS], X_AXIS); o[Y_AXIS] = col->relative_coordinate (common[Y_AXIS], Y_AXIS); return o; } - Direction stem_dir = Directional_element_interface::get (stem_l); - o[X_AXIS] = stem_l->relative_coordinate (0, X_AXIS); + Direction stem_dir = Directional_element_interface::get (stem); + o[X_AXIS] = stem->relative_coordinate (0, X_AXIS); /* Simply set x to middle of notehead */ - - o[X_AXIS] -= 0.5 * stem_dir * col->extent (col,X_AXIS).length (); + Real x_extent; + if (Grob *head = Note_column::first_head (col)) + x_extent = head->extent (head, X_AXIS).length (); + else + x_extent = col->extent (col, X_AXIS).length (); + o[X_AXIS] -= 0.5 * stem_dir * x_extent; if ((stem_dir == dir) - && !stem_l->extent (stem_l, Y_AXIS).empty_b ()) + && !stem->extent (stem, Y_AXIS).empty_b ()) { - o[Y_AXIS] = stem_l->extent (common[Y_AXIS], Y_AXIS)[dir]; + o[Y_AXIS] = stem->extent (common[Y_AXIS], Y_AXIS)[dir]; } else { @@ -409,93 +458,67 @@ Slur::encompass_offset (Grob*me, } Array -Slur::get_encompass_offset_arr (Grob *me) +Slur::get_encompass_offsets (Grob *me) { - Spanner*sp = dynamic_cast(me); + Spanner*sp = dynamic_cast (me); SCM eltlist = me->get_grob_property ("note-columns"); - Grob *common[] = {me->common_refpoint (eltlist, X_AXIS), - me->common_refpoint (eltlist, Y_AXIS)}; + Grob *common[] = {common_refpoint_of_list (eltlist, me, X_AXIS), + common_refpoint_of_list (eltlist, me, Y_AXIS)}; common[X_AXIS] = common[X_AXIS]->common_refpoint (sp->get_bound (RIGHT), X_AXIS); common[X_AXIS] = common[X_AXIS]->common_refpoint (sp->get_bound (LEFT), X_AXIS); - Link_array encompass_arr; - while (gh_pair_p (eltlist)) - { - encompass_arr.push (unsmob_grob (gh_car (eltlist))); - eltlist =gh_cdr (eltlist); - } - encompass_arr.reverse (); - - - Array offset_arr; + Link_array encompasses = ly_scm2grobs (eltlist); + Array offsets; Offset origin (me->relative_coordinate (common[X_AXIS], X_AXIS), me->relative_coordinate (common[Y_AXIS], Y_AXIS)); int first = 1; - int last = encompass_arr.size () - 2; + int last = encompasses.size () - 2; - offset_arr.push (get_attachment (me, LEFT, common)); + offsets.push (get_attachment (me, LEFT, common)); /* left is broken edge */ - - if (encompass_arr[0] != sp->get_bound (LEFT)) + if (encompasses[0] != sp->get_bound (LEFT)) { first--; // ? - offset_arr[0][Y_AXIS] -= - encompass_arr[0]->relative_coordinate (common[Y_AXIS], Y_AXIS) + offsets[0][Y_AXIS] -= + encompasses[0]->relative_coordinate (common[Y_AXIS], Y_AXIS) - me->relative_coordinate (common[Y_AXIS], Y_AXIS); } /* right is broken edge */ - if (encompass_arr.top () != sp->get_bound (RIGHT)) + if (encompasses.top () != sp->get_bound (RIGHT)) { last++; } for (int i = first; i <= last; i++) { - Offset o (encompass_offset (me, encompass_arr[i], common)); - offset_arr.push (o - origin); + Offset o (encompass_offset (me, encompasses[i], common)); + offsets.push (o - origin); } - offset_arr.push (Offset (sp->spanner_length (), 0) + get_attachment (me, RIGHT,common)); + offsets.push (Offset (sp->spanner_length (), 0) + get_attachment (me, RIGHT,common)); - if (encompass_arr[0] != sp->get_bound (LEFT)) + if (encompasses[0] != sp->get_bound (LEFT)) { - offset_arr.top ()[Y_AXIS] -= encompass_arr.top ()->relative_coordinate (common[Y_AXIS], Y_AXIS) + offsets.top ()[Y_AXIS] -= encompasses.top ()->relative_coordinate (common[Y_AXIS], Y_AXIS) - me->relative_coordinate (common[Y_AXIS], Y_AXIS); } - return offset_arr; + return offsets; } -MAKE_SCHEME_CALLBACK(Slur,set_spacing_rods,1); -SCM -Slur::set_spacing_rods (SCM smob) -{ - Grob*me = unsmob_grob (smob); - - Rod r; - Spanner*sp = dynamic_cast(me); - r.item_l_drul_[LEFT] = sp->get_bound (LEFT); - r.item_l_drul_[RIGHT] = sp->get_bound (RIGHT); - r.distance_f_ = - gh_scm2double (me->get_grob_property ("minimum-length")) - * 1.0; - - r.add_to_cols (); - return SCM_UNSPECIFIED; -} /* @@ -507,7 +530,7 @@ Slur::height (SCM smob, SCM ax) { Axis a = (Axis)gh_scm2int (ax); Grob * me = unsmob_grob (smob); - assert ( a == Y_AXIS); + assert (a == Y_AXIS); SCM mol = me->get_uncached_molecule (); return ly_interval2scm (unsmob_molecule (mol)->extent (a)); @@ -527,7 +550,7 @@ Slur::brew_molecule (SCM smob) return SCM_EOL; } - Real thick = me->paper_l ()->get_var ("stafflinethickness") * + Real thick = me->get_paper ()->get_var ("linethickness") * gh_scm2double (me->get_grob_property ("thickness")); Bezier one = get_curve (me); @@ -542,7 +565,7 @@ Slur::brew_molecule (SCM smob) else a = Lookup::slur (one, Directional_element_interface::get (me) * thick, thick); - return a.smobbed_copy(); + return a.smobbed_copy (); } void @@ -551,16 +574,17 @@ Slur::set_control_points (Grob*me) Real staff_space = Staff_symbol_referencer::staff_space ((Grob*)me); SCM details = me->get_grob_property ("details"); - SCM h_inf_scm = scm_assq (ly_symbol2scm ("height-limit"), details); - SCM r_0_scm = scm_assq (ly_symbol2scm ("ratio"), details); + SCM h_inf_scm = me->get_grob_property ("height-limit"); + SCM r_0_scm = me->get_grob_property ("ratio"); - Real r_0 = gh_scm2double (gh_cdr (r_0_scm)); - Real h_inf = staff_space * gh_scm2double (gh_cdr (h_inf_scm)); + Real r_0 = gh_scm2double (r_0_scm); + Real h_inf = staff_space * gh_scm2double (h_inf_scm); - Slur_bezier_bow bb (get_encompass_offset_arr (me), + Slur_bezier_bow bb (get_encompass_offsets (me), Directional_element_interface::get (me), h_inf, r_0); + if (bb.fit_factor () > 1.0) { Real length = bb.curve_.control_[3][X_AXIS]; @@ -571,11 +595,11 @@ Slur::set_control_points (Grob*me) if (gh_number_p (ssb)) sb = gh_scm2double (ssb); - bb.minimise_enclosed_area ( sb, details); + bb.minimise_enclosed_area (sb, details); SCM sbf = scm_assq (ly_symbol2scm ("force-blowfit"), details); Real bff = 1.0; - if (gh_pair_p (sbf) && gh_number_p (gh_cdr (sbf))) - bff = gh_scm2double (gh_cdr (sbf)); + if (gh_pair_p (sbf) && gh_number_p (ly_cdr (sbf))) + bff = gh_scm2double (ly_cdr (sbf)); bb.curve_.control_[1][Y_AXIS] *= bff; bb.curve_.control_[2][Y_AXIS] *= bff; @@ -583,7 +607,7 @@ Slur::set_control_points (Grob*me) Real beautiful = length * default_height * sb; - Real area = bb.enclosed_area_f (); + Real area = bb.get_enclosed_area (); /* Slurs that fit beautifully are not ugly @@ -598,7 +622,7 @@ Slur::set_control_points (Grob*me) SCM controls = SCM_EOL; for (int i= 4; i--;) { - controls = gh_cons ( ly_offset2scm (b.control_[i]), controls); + controls = gh_cons (ly_offset2scm (b.control_[i]), controls); /* BRRR WHURG. All these null control-points, where do they all come from? @@ -619,9 +643,14 @@ Slur::get_curve (Grob*me) Bezier b; int i = 0; + SCM attach = me->get_grob_property ("attachment"); + if (!gh_pair_p (attach)) + attach = set_extremities(me); + + if (!Directional_element_interface::get (me) - || ! gh_symbol_p (index_cell (me->get_grob_property ("attachment"), LEFT)) - || ! gh_symbol_p (index_cell (me->get_grob_property ("attachment"), RIGHT))) + || ! gh_symbol_p (index_get_cell (attach, LEFT)) + || ! gh_symbol_p (index_get_cell (attach, RIGHT))) set_extremities (me); if (!gh_pair_p (me->get_grob_property ("control-points"))) @@ -631,13 +660,13 @@ Slur::get_curve (Grob*me) if (!scm_ilength (me->get_grob_property ("note-columns"))) return b; - for (SCM s= me->get_grob_property ("control-points"); s != SCM_EOL; s = gh_cdr (s)) + for (SCM s= me->get_grob_property ("control-points"); s != SCM_EOL; s = ly_cdr (s)) { - b.control_[i] = ly_scm2offset (gh_car (s)); + b.control_[i] = ly_scm2offset (ly_car (s)); i++; } - Array enc (get_encompass_offset_arr (me)); + Array enc (get_encompass_offsets (me)); Direction dir = Directional_element_interface::get (me); Real x1 = enc[0][X_AXIS]; @@ -650,7 +679,7 @@ Slur::get_curve (Grob*me) if (x > x1 && x ? dir * (enc[i][Y_AXIS] - y); + off = off >? dir * (enc[i][Y_AXIS] - y); } } b.translate (Offset (0, dir * off)); @@ -658,10 +687,9 @@ Slur::get_curve (Grob*me) } -bool -Slur::has_interface (Grob*me) -{ - return me->has_interface (ly_symbol2scm ("slur-interface")); -} +ADD_INTERFACE (Slur,"slur-interface", + "A slur", + "attachment attachment-offset beautiful control-points dashed details de-uglify-parameters direction extremity-rules extremity-offset-alist height-limit ratio slope-limit thickness y-free"); +