10 #include "leastsquares.hh"
13 #include "paper-def.hh"
15 #include "grouping.hh"
27 Stem_info(Stem const *);
30 Stem_info::Stem_info(Stem const *s)
34 idealy = dir * s->stem_end_f();
35 miny = dir * s->stem_start_f();
36 assert(miny <= idealy);
44 assert(status >= POSTCALCED);
46 Real w=(paper()->note_width() + width().length())/2.0;
47 return Offset(w, (left_pos + w* slope)*paper()->internote());
60 stems.bottom().add(s);
61 s->add_dependency(this);
62 s->print_flag_b_ = false;
66 Beam::set_default_dir()
69 dirs[0]=0; dirs[1] =0;
70 for (iter_top(stems,i); i.ok(); i++) {
71 int d = i->get_default_dir();
74 dir_i_ = (dirs[0] > dirs[1]) ? -1 : 1;
75 for (iter_top(stems,i); i.ok(); i++) {
81 should use minimum energy formulation (cf linespacing)
86 Array<Stem_info> sinfo;
87 for (iter_top(stems,i); i.ok(); i++) {
88 i->set_default_extents();
95 Real leftx = sinfo[0].x;
97 for (int i=0; i < sinfo.size(); i++) {
99 l.input.push(Offset(sinfo[i].x, sinfo[i].idealy));
102 l.minimise(slope, left_pos);
104 for (int i=0; i < sinfo.size(); i++) {
105 Real y = sinfo[i].x * slope + left_pos;
106 Real my = sinfo[i].miny;
116 Real sl = slope*paper()->internote();
117 paper()->lookup_l()->beam(sl, 20 PT);
118 slope = sl /paper()->internote();
125 Real x0 = s->hpos_f();
126 for (; s.ok() ; s++) {
127 Real x = s->hpos_f()-x0;
128 s->set_stemend(left_pos + slope * x);
134 Beam::do_post_processing()
141 Beam::set_grouping(Rhythmic_grouping def, Rhythmic_grouping cur)
145 assert(cur.children.size() == stems.size());
153 for (; s.ok(); s++) {
154 int f = intlog2(abs(s->flag_i_))-2;
159 b= cur.generate_beams(flags, fi);
162 assert(stems.size() == b.size()/2);
166 for (int i=0; i < b.size() && s.ok(); i+=2, s++) {
167 s->beams_left_i_ = b[i];
168 s->beams_right_i_ = b[i+1];
175 Beam::do_break_at( PCol *, PCol *) const
177 Beam *beam_p= new Beam(*this);
183 Beam::do_pre_processing()
185 left_col_l_ = (*stems.top()) ->pcol_l_;
186 right_col_l_ = (*stems.bottom())->pcol_l_;
187 assert(stems.size()>1);
195 Beam::do_width() const
197 Beam * me = (Beam*) this; // ugh
198 return Interval( (*me->stems.top()) ->hpos_f(),
199 (*me->stems.bottom()) ->hpos_f() );
203 beams to go with one stem.
206 Beam::stem_beams(Stem *here, Stem *next, Stem *prev)const
208 assert( !next || next->hpos_f() > here->hpos_f() );
209 assert( !prev || prev->hpos_f() < here->hpos_f() );
210 Real dy=paper()->internote()*2;
211 Real stemdx = paper()->rule_thickness();
212 Real sl = slope*paper()->internote();
213 paper()->lookup_l()->beam(sl, 20 PT);
218 /* half beams extending to the left. */
220 int lhalfs= lhalfs = here->beams_left_i_ - prev->beams_right_i_ ;
221 int lwholebeams= here->beams_left_i_ <? prev->beams_right_i_ ;
222 Real w = (here->hpos_f() - prev->hpos_f())/4;
225 if (lhalfs) // generates warnings if not
226 a = paper()->lookup_l()->beam(sl, w);
227 a.translate(Offset (-w, -w * sl));
228 for (int j = 0; j < lhalfs; j++) {
230 b.translate(Offset(0, -dir_i_ * dy * (lwholebeams+j)));
236 int rhalfs = here->beams_right_i_ - next->beams_left_i_;
237 int rwholebeams = here->beams_right_i_ <? next->beams_left_i_;
239 Real w = next->hpos_f() - here->hpos_f();
240 Atom a = paper()->lookup_l()->beam(sl, w + stemdx);
243 for (; j < rwholebeams; j++) {
245 b.translate(Offset(0, -dir_i_ * dy * j));
251 a = paper()->lookup_l()->beam(sl, w);
253 for (; j < rwholebeams + rhalfs; j++) {
255 b.translate(Offset(0, -dir_i_ * dy * j));
260 leftbeams.add(rightbeams);
266 Beam::brew_molecule_p() const
269 Real inter=paper()->internote();
271 Real x0 = stems.top()->hpos_f();
273 for (iter_top(stems,i); i.ok(); i++) {
274 PCursor<Stem*> p(i-1);
275 PCursor<Stem*> n(i+1);
276 Stem * prev = p.ok() ? p.ptr() : 0;
277 Stem * next = n.ok() ? n.ptr() : 0;
279 Molecule sb = stem_beams(i, next, prev);
280 Real x = i->hpos_f()-x0;
281 sb.translate(Offset(x, (x * slope + left_pos)* inter));
284 out->translate(Offset(x0 - left_col_l_->hpos,0));
288 IMPLEMENT_STATIC_NAME(Beam);
291 Beam::do_print()const
294 mtor << "slope " <<slope << "left ypos " << left_pos;