source/designer/manipulator.cpp

   1 /* $Id$
   2
   3 This file is part of the MSP Märklin suite
   4 Copyright © 2006-2008 Mikkosoft Productions, Mikko Rasa
   5 Distributed under the GPL
   6 */
   7
   8 #include <algorithm>
   9 #include <cmath>
  10 #include <GL/gl.h>
  11 #include <msp/strings/formatter.h>
  12 #include "3d/layout.h"
  13 #include "libmarklin/tracktype.h"
  14 #include "designer.h"
  15 #include "manipulator.h"
  16 #include "selection.h"
  17
  18 using namespace std;
  19 using namespace Marklin;
  20 using namespace Msp;
  21
  22 Manipulator::Manipulator(Designer &d, Selection &s):
  23         designer(d),
  24         selection(s),
  25         wrap_rot(0),
  26         mode(NONE),
  27         angle(0)
  28 {
  29         selection.signal_changed.connect(sigc::mem_fun(this, &Manipulator::selection_changed));
  30 }
  31
  32 void Manipulator::start_move()
  33 {
  34         if(mode)
  35                 cancel();
  36
  37         move_origin = gpointer;
  38
  39         mode = MOVE;
  40 }
  41
  42 void Manipulator::start_rotate()
  43 {
  44         if(mode)
  45                 cancel();
  46
  47         rot_origin = atan2(gpointer.y-center.y, gpointer.x-center.x);
  48
  49         mode = ROTATE;
  50 }
  51
  52 void Manipulator::start_elevate()
  53 {
  54         if(mode)
  55                 cancel();
  56
  57         elev_origin = pointer_y;
  58
  59         mode = ELEVATE;
  60 }
  61
  62 void Manipulator::duplicate()
  63 {
  64         if(mode)
  65                 cancel();
  66
  67         list<Track *> new_tracks;
  68         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
  69         {
  70                 Track *track = i->track->copy();
  71                 designer.get_layout()->add_track(*track);
  72                 new_tracks.push_back(track);
  73         }
  74
  75         selection.clear();
  76         for(list<Track *>::iterator i=new_tracks.begin(); i!=new_tracks.end(); ++i)
  77         {
  78                 selection.add_track(*i);
  79                 for(list<Track *>::iterator j=i; j!=new_tracks.end(); ++j)
  80                         if(j!=i)
  81                                 (*i)->snap_to(**j, true);
  82         }
  83 }
  84
  85 void Manipulator::flatten()
  86 {
  87         if(mode)
  88                 cancel();
  89
  90         if(tracks.empty()) return;
  91
  92         float z = 0;
  93         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
  94                 z += i->track->get_position().z+i->track->get_slope()/2;
  95         z /= tracks.size();
  96
  97         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
  98         {
  99                 Point p = i->track->get_position();
 100                 i->track->set_position(Point(p.x, p.y, z));
 101                 i->track->set_slope(0);
 102         }
 103
 104         for(set<Track *>::iterator i=neighbors.begin(); i!=neighbors.end(); ++i)
 105                 (*i)->check_slope();
 106
 107         update_wrap();
 108 }
 109
 110 void Manipulator::even_slope(bool smooth)
 111 {
 112         if(mode)
 113                 cancel();
 114
 115         if(neighbors.size()!=2)
 116                 return;
 117
 118         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 119                 if(i->track->get_type().get_endpoints().size()!=2)
 120                         return;
 121
 122         list<Track *> tracks2;
 123         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 124                 tracks2.push_back(i->track);
 125
 126         float total_len = 0;
 127
 128         list<TrackOrder> order;
 129         Track *cur = *neighbors.begin();
 130         while(tracks2.size())
 131         {
 132                 bool rev = false;
 133                 for(list<Track *>::iterator i=tracks2.begin(); i!=tracks2.end(); ++i)
 134                 {
 135                         const vector<Track *> &links = (*i)->get_links();
 136                         if(links[0]==cur)
 137                         {
 138                                 cur = *i;
 139                                 tracks2.erase(i);
 140                                 break;
 141                         }
 142                         else if(links[1]==cur)
 143                         {
 144                                 cur = *i;
 145                                 rev = true;
 146                                 tracks2.erase(i);
 147                                 break;
 148                         }
 149                 }
 150                 order.push_back(TrackOrder(cur, rev));
 151                 total_len += cur->get_type().get_total_length();
 152         }
 153
 154         set<Track *>::iterator nb = neighbors.begin();
 155         int epi = (*nb)->get_endpoint_by_link(*order.front().track);
 156         float start_z = (*nb)->get_endpoint_position(epi).z;
 157         ++nb;
 158         epi = (*nb)->get_endpoint_by_link(*order.back().track);
 159         float end_z = (*nb)->get_endpoint_position(epi).z;
 160
 161         if(smooth)
 162         {
 163                 float dir = (end_z>start_z)?1:-1;
 164                 float cur_slope = 0;
 165                 while((end_z-start_z)*dir/total_len>cur_slope+0.025 && order.size()>2)
 166                 {
 167                         cur_slope += 0.025;
 168
 169                         float dz = order.front().track->get_type().get_total_length()*dir*cur_slope;
 170                         set_slope(order.front(), start_z, dz);
 171                         start_z += dz;
 172                         total_len -= order.front().track->get_type().get_total_length();
 173                         order.erase(order.begin());
 174
 175                         dz = order.back().track->get_type().get_total_length()*dir*cur_slope;
 176                         set_slope(order.back(), end_z-dz, dz);
 177                         end_z -= dz;
 178                         total_len -= order.back().track->get_type().get_total_length();
 179                         order.erase(--order.end());
 180                 }
 181         }
 182
 183         float cur_z = start_z;
 184         for(list<TrackOrder>::iterator i=order.begin(); i!=order.end(); ++i)
 185         {
 186                 float dz = i->track->get_type().get_total_length()*(end_z-start_z)/total_len;
 187                 set_slope(*i, cur_z, dz);
 188                 cur_z += dz;
 189         }
 190
 191         for(set<Track *>::iterator i=neighbors.begin(); i!=neighbors.end(); ++i)
 192                 (*i)->check_slope();
 193
 194         update_wrap();
 195 }
 196
 197 void Manipulator::cancel()
 198 {
 199         if(!mode)
 200                 return;
 201         mode = NONE;
 202
 203         wrap_pos = center;
 204         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 205         {
 206                 i->track->set_position(Point(center.x+i->pos.x, center.y+i->pos.y, center.z+i->pos.z));
 207                 i->track->set_rotation(i->rot);
 208         }
 209
 210         for(set<Track *>::iterator i=neighbors.begin(); i!=neighbors.end(); ++i)
 211                 (*i)->check_slope();
 212
 213         angle = 0;
 214         wrap_rot = 0;
 215
 216         signal_done.emit(false);
 217 }
 218
 219 void Manipulator::button_press(int, int, float, float, unsigned btn)
 220 {
 221         if(btn==3)
 222                 cancel();
 223         else if(mode)
 224         {
 225                 mode = NONE;
 226                 update_wrap();
 227                 angle = 0;
 228
 229                 for(set<Track *>::iterator i=neighbors.begin(); i!=neighbors.end(); ++i)
 230                         for(vector<MTrack>::iterator j=tracks.begin(); j!=tracks.end(); ++j)
 231                                 j->track->break_link(**i);
 232
 233                 const set<Track *> &ltracks = designer.get_layout()->get_tracks();
 234                 for(set<Track *>::const_iterator i=ltracks.begin(); i!=ltracks.end(); ++i)
 235                 {
 236                         bool ok = true;
 237                         for(vector<MTrack>::iterator j=tracks.begin(); (j!=tracks.end() && ok); ++j)
 238                                 ok = (j->track!=*i);
 239                         if(!ok) continue;
 240
 241                         for(vector<MTrack>::iterator j=tracks.begin(); j!=tracks.end(); ++j)
 242                                 j->track->snap_to(**i, true);
 243                 }
 244
 245                 for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 246                         i->rot = i->track->get_rotation();
 247
 248                 update_neighbors();
 249
 250                 signal_done.emit(true);
 251         }
 252 }
 253
 254 void Manipulator::pointer_motion(int, int y, float gx, float gy)
 255 {
 256         pointer_y = y;
 257         gpointer = Point(gx, gy, 0);
 258
 259         if(mode==MOVE)
 260         {
 261                 Point delta(gpointer.x-move_origin.x, gpointer.y-move_origin.y, 0);
 262
 263                 wrap_pos = Point(center.x+delta.x, center.y+delta.y, center.z);
 264                 for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 265                 {
 266                         i->track->set_position(Point(wrap_pos.x+i->pos.x, wrap_pos.y+i->pos.y, wrap_pos.z+i->pos.z));
 267                         i->track->set_rotation(i->rot);
 268                 }
 269
 270                 const set<Track *> &ltracks = designer.get_layout()->get_tracks();
 271                 MTrack *snapped = 0;
 272                 for(set<Track *>::const_iterator i=ltracks.begin(); (i!=ltracks.end() && !snapped); ++i)
 273                 {
 274                         bool ok = true;
 275                         for(vector<MTrack>::iterator j=tracks.begin(); (j!=tracks.end() && ok); ++j)
 276                                 ok = (j->track!=*i);
 277                         if(!ok) continue;
 278
 279                         for(vector<MTrack>::iterator j=tracks.begin(); (j!=tracks.end() && !snapped); ++j)
 280                                 if(j->track->snap_to(**i, false))
 281                                         snapped = &*j;
 282                 }
 283
 284                 if(snapped)
 285                 {
 286                         float da = snapped->track->get_rotation()-snapped->rot;
 287                         float c = cos(da);
 288                         float s = sin(da);
 289                         const Point &sp = snapped->track->get_position();
 290                         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 291                         {
 292                                 if(&*i==snapped)
 293                                         continue;
 294
 295                                 Point dp(i->pos.x-snapped->pos.x, i->pos.y-snapped->pos.y, 0);
 296                                 i->track->set_position(Point(sp.x+c*dp.x-s*dp.y, sp.y+s*dp.x+c*dp.y, sp.z));
 297                                 i->track->set_rotation(i->rot+da);
 298                         }
 299                 }
 300         }
 301         else if(mode==ROTATE)
 302         {
 303                 float a = atan2(gpointer.y-center.y, gpointer.x-center.x);
 304                 angle += a-rot_origin;
 305                 rot_origin = a;
 306
 307                 wrap_rot = angle;
 308                 for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 309                 {
 310                         float c = cos(angle);
 311                         float s = sin(angle);
 312                         i->track->set_position(Point(center.x+c*i->pos.x-s*i->pos.y, center.y+s*i->pos.x+c*i->pos.y, center.z*i->pos.z));
 313                         i->track->set_rotation(angle+i->rot);
 314                 }
 315         }
 316         else if(mode==ELEVATE)
 317         {
 318                 float dz = (y-elev_origin)/1000.;
 319
 320                 signal_status.emit(format("Elevation: %+.0fmm (%.0fmm)", dz*1000, (center.z+dz)*1000));
 321
 322                 wrap_pos.z = center.z+dz;
 323                 for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 324                         i->track->set_position(Point(center.x+i->pos.x, center.y+i->pos.y, center.z+i->pos.z+dz));
 325
 326                 for(set<Track *>::iterator i=neighbors.begin(); i!=neighbors.end(); ++i)
 327                         (*i)->check_slope();
 328         }
 329 }
 330
 331 void Manipulator::render()
 332 {
 333         glPushMatrix();
 334         glTranslatef(wrap_pos.x, wrap_pos.y, wrap_pos.z);
 335         glRotatef(wrap_rot*180/M_PI, 0, 0, 1);
 336
 337         glLineWidth(2);
 338         glColor4f(0, 1, 0, 0.5);
 339         for(list<TrackWrap>::iterator i=wrap.begin(); i!=wrap.end(); ++i)
 340         {
 341                 glPushMatrix();
 342                 glTranslatef(i->pos.x, i->pos.y, i->pos.z);
 343                 glRotatef(i->rot*180/M_PI, 0, 0, 1);
 344
 345                 glBegin(GL_LINE_LOOP);
 346                 glVertex2f(-i->width/2, -i->height/2);
 347                 glVertex2f(i->width/2, -i->height/2);
 348                 glVertex2f(i->width/2, i->height/2);
 349                 glVertex2f(-i->width/2, i->height/2);
 350                 glEnd();
 351
 352                 glPopMatrix();
 353         }
 354
 355         glPopMatrix();
 356 }
 357
 358 /*** private ***/
 359
 360 void Manipulator::selection_changed()
 361 {
 362         if(mode)
 363                 cancel();
 364
 365         tracks.clear();
 366         const set<Track *> &stracks = selection.get_tracks();
 367         tracks.insert(tracks.end(), stracks.begin(), stracks.end());
 368
 369         update_neighbors();
 370         update_wrap();
 371 }
 372
 373 void Manipulator::update_wrap()
 374 {
 375         wrap.clear();
 376         float min_x = 0, max_x = 0;
 377         float min_y = 0, max_y = 0;
 378         float min_z = 0;
 379         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 380         {
 381                 Track3D &t3d = designer.get_layout_3d()->get_track(*i->track);
 382
 383                 TrackWrap tw;
 384                 float min_area = 100;
 385                 for(float a=0; a<M_PI; a+=0.01)
 386                 {
 387                         Point minp, maxp;
 388                         t3d.get_bounds(a, minp, maxp);
 389                         float area = (maxp.x-minp.x)*(maxp.y-minp.y);
 390                         if(area<min_area)
 391                         {
 392                                 float c = cos(a);
 393                                 float s = sin(a);
 394                                 float x = (minp.x+maxp.x)/2;
 395                                 float y = (minp.y+maxp.y)/2;
 396                                 tw.pos = Point(c*x-s*y, s*x+c*y, minp.z);
 397                                 tw.rot = a;
 398                                 tw.width = maxp.x-minp.x+0.01;
 399                                 tw.height = maxp.y-minp.y+0.01;
 400
 401                                 min_area = area;
 402                         }
 403                 }
 404
 405                 if(i==tracks.begin())
 406                 {
 407                         min_x = max_x = tw.pos.x;
 408                         min_y = max_y = tw.pos.y;
 409                         min_z = tw.pos.z;
 410                 }
 411                 else
 412                 {
 413                         min_x = min(min_x, tw.pos.x);
 414                         max_x = max(max_x, tw.pos.x);
 415                         min_y = min(min_y, tw.pos.y);
 416                         max_y = max(max_y, tw.pos.y);
 417                         min_z = min(min_z, tw.pos.z);
 418                 }
 419                 wrap.push_back(tw);
 420         }
 421
 422         center = Point((min_x+max_x)/2, (min_y+max_y)/2, min_z);
 423         wrap_pos = center;
 424         wrap_rot = 0;
 425         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 426         {
 427                 const Point &tp = i->track->get_position();
 428                 i->pos = Point(tp.x-center.x, tp.y-center.y, tp.z-center.z);
 429         }
 430         for(list<TrackWrap>::iterator i=wrap.begin(); i!=wrap.end(); ++i)
 431         {
 432                 i->pos.x -= center.x;
 433                 i->pos.y -= center.y;
 434                 i->pos.z -= center.z;
 435         }
 436 }
 437
 438 void Manipulator::update_neighbors()
 439 {
 440         neighbors.clear();
 441         for(vector<MTrack>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 442         {
 443                 const vector<Track *> &links = i->track->get_links();
 444                 for(vector<Track *>::const_iterator j=links.begin(); j!=links.end(); ++j)
 445                 {
 446                         if(!*j)
 447                                 continue;
 448                         if(neighbors.count(*j))
 449                                 continue;
 450
 451                         bool ok = true;
 452                         for(vector<MTrack>::iterator k=tracks.begin(); (k!=tracks.end() && ok); ++k)
 453                                 ok = (k->track!=*j);
 454
 455                         if(ok)
 456                                 neighbors.insert(*j);
 457                 }
 458         }
 459 }
 460
 461 void Manipulator::set_slope(TrackOrder &track, float z, float dz)
 462 {
 463         const Point &p = track.track->get_position();
 464         if(track.rev)
 465         {
 466                 track.track->set_position(Point(p.x, p.y, z+dz));
 467                 track.track->set_slope(-dz);
 468         }
 469         else
 470         {
 471                 track.track->set_position(Point(p.x, p.y, z));
 472                 track.track->set_slope(dz);
 473         }
 474 }
 475
 476 Manipulator::MTrack::MTrack(Track *t):
 477         track(t),
 478         pos(track->get_position()),
 479         rot(track->get_rotation())
 480 { }