9 #include "leastsquares.hh"
14 #include "grouping.hh"
27 Stem_info(const Stem*);
30 Stem_info::Stem_info(const Stem*s)
34 idealy = max(dir*s->top, dir*s->bot);
35 miny = max(dir*s->minnote, dir*s-> maxnote);
36 assert(miny <= idealy);
45 assert(status >= POSTCALCED);
47 Real w=(paper()->note_width() + width().length())/2.0;
48 return Offset(w, (left_pos + w* slope)*paper()->interline());
62 stems.bottom().add(s);
63 s->add_depedency(this);
64 s->print_flag = false;
68 Beam::set_default_dir()
71 dirs[0]=0; dirs[1] =0;
72 for (iter_top(stems,i); i.ok(); i++) {
73 int d = i->get_default_dir();
76 dir = (dirs[0] > dirs[1]) ? -1 : 1;
77 for (iter_top(stems,i); i.ok(); i++) {
83 should use minimum energy formulation (cf linespacing)
88 Array<Stem_info> sinfo;
89 for (iter_top(stems,i); i.ok(); i++) {
90 i->set_default_extents();
94 Real leftx = sinfo[0].x;
96 for (int i=0; i < sinfo.size(); i++) {
98 l.input.push(Offset(sinfo[i].x, sinfo[i].idealy));
101 l.minimise(slope, left_pos);
103 for (int i=0; i < sinfo.size(); i++) {
104 Real y = sinfo[i].x * slope + left_pos;
105 Real my = sinfo[i].miny;
115 Real sl = slope*paper()->internote();
116 paper()->lookup_p_->beam(sl, convert_dimen(20,"pt"));
117 slope = sl /paper()->internote();
125 for (; s.ok() ; s++) {
126 Real x = s->hpos()-x0;
127 s->set_stemend(left_pos + slope * x);
133 Beam::do_post_processing()
140 Beam::set_grouping(Rhythmic_grouping def, Rhythmic_grouping cur)
144 assert(cur.children.size() == stems.size());
152 for (; s.ok(); s++) {
153 int f = intlog2(abs(s->flag))-2;
158 b= cur.generate_beams(flags, fi);
161 assert(stems.size() == b.size()/2);
165 for (int i=0; i < b.size() && s.ok(); i+=2, s++) {
166 s->beams_left = b[i];
167 s->beams_right = b[i+1];
174 Beam::do_break_at( PCol *, PCol *) const
176 Beam *beam_p= new Beam(*this);
182 Beam::do_pre_processing()
184 left = (*stems.top()) ->pcol_l_;
185 right = (*stems.bottom())->pcol_l_;
186 assert(stems.size()>1);
196 Beam * me = (Beam*) this; // ugh
197 return Interval( (*me->stems.top()) ->hpos(),
198 (*me->stems.bottom()) ->hpos() );
202 beams to go with one stem.
205 Beam::stem_beams(Stem *here, Stem *next, Stem *prev)const
207 assert( !next || next->hpos() > here->hpos() );
208 assert( !prev || prev->hpos() < here->hpos() );
209 Real dy=paper()->internote()*2;
210 Real stemdx = paper()->rule_thickness();
211 Real sl = slope*paper()->internote();
212 paper()->lookup_p_->beam(sl, convert_dimen(20,"pt"));
217 /* half beams extending to the left. */
219 int lhalfs= lhalfs = here->beams_left - prev->beams_right ;
220 int lwholebeams= here->beams_left <? prev->beams_right ;
221 Real w = (here->hpos() - prev->hpos())/4;
222 Atom a = paper()->lookup_p_->beam(sl, w);
223 a.translate(Offset (-w, -w * sl));
224 for (int j = 0; j < lhalfs; j++) {
226 b.translate(Offset(0, -dir * dy * (lwholebeams+j)));
232 int rhalfs = here->beams_right - next->beams_left;
233 int rwholebeams = here->beams_right <? next->beams_left;
235 Real w = next->hpos() - here->hpos();
236 Atom a = paper()->lookup_p_->beam(sl, w + stemdx);
239 for (; j < rwholebeams; j++) {
241 b.translate(Offset(0, -dir * dy * j));
245 a = paper()->lookup_p_->beam(sl, w);
247 for (; j < rwholebeams + rhalfs; j++) {
249 b.translate(Offset(0, -dir * dy * j));
254 leftbeams.add(rightbeams);
260 Beam::brew_molecule_p() const return out;
262 Real inter=paper()->internote();
264 Real x0 = stems.top()->hpos();
266 for (iter_top(stems,i); i.ok(); i++) {
267 PCursor<Stem*> p(i-1);
268 PCursor<Stem*> n(i+1);
269 Stem * prev = p.ok() ? p.ptr() : 0;
270 Stem * next = n.ok() ? n.ptr() : 0;
272 Molecule sb = stem_beams(i, next, prev);
273 Real x = i->hpos()-x0;
274 sb.translate(Offset(x, (x * slope + left_pos)* inter));
277 out->translate(Offset(x0 - left->hpos,0));
281 Beam::do_print()const
284 mtor << "slope " <<slope << "left ypos " << left_pos;