src/livarot/PathCutting.cpp

   1 /*
   2  *  PathCutting.cpp
   3  *  nlivarot
   4  *
   5  *  Created by fred on someday in 2004.
   6  *  public domain
   7  *
   8  *  Additional Code by Authors:
   9  *   Richard Hughes <cyreve@users.sf.net>
  10  *
  11  *  Copyright (C) 2005 Richard Hughes
  12  *
  13  *  Released under GNU GPL, read the file 'COPYING' for more information
  14  */
  15
  16 #include <cstring>
  17 #include <string>
  18 #include <cstdio>
  19
  20 #include "Path.h"
  21 #include "style.h"
  22 #include "livarot/path-description.h"
  23 #include "libnr/n-art-bpath.h"
  24 #include "libnr/nr-point-matrix-ops.h"
  25
  26 void  Path::DashPolyline(float head,float tail,float body,int nbD,float *dashs,bool stPlain,float stOffset)
  27 {
  28   if ( nbD <= 0 || body <= 0.0001 ) return; // pas de tirets, en fait
  29
  30   std::vector<path_lineto> orig_pts = pts;
  31   pts.clear();
  32
  33   int       lastMI=-1;
  34   int curP = 0;
  35   int lastMP = -1;
  36
  37   for (int i = 0; i < int(orig_pts.size()); i++) {
  38     if ( orig_pts[curP].isMoveTo == polyline_moveto ) {
  39       if ( lastMI >= 0 && lastMI < i-1 ) { // au moins 2 points
  40         DashSubPath(i-lastMI,lastMP, orig_pts, head,tail,body,nbD,dashs,stPlain,stOffset);
  41       }
  42       lastMI=i;
  43       lastMP=curP;
  44     }
  45     curP++;
  46   }
  47   if ( lastMI >= 0 && lastMI < int(orig_pts.size()) - 1 ) {
  48     DashSubPath(orig_pts.size() - lastMI, lastMP, orig_pts, head, tail, body, nbD, dashs, stPlain, stOffset);
  49   }
  50 }
  51
  52 void  Path::DashPolylineFromStyle(SPStyle *style, float scale, float min_len)
  53 {
  54     if (style->stroke_dash.n_dash) {
  55
  56         double dlen = 0.0;
  57         for (int i = 0; i < style->stroke_dash.n_dash; i++) {
  58             dlen += style->stroke_dash.dash[i] * scale;
  59         }
  60         if (dlen >= min_len) {
  61             NRVpathDash dash;
  62             dash.offset = style->stroke_dash.offset * scale;
  63             dash.n_dash = style->stroke_dash.n_dash;
  64             dash.dash = g_new(double, dash.n_dash);
  65             for (int i = 0; i < dash.n_dash; i++) {
  66                 dash.dash[i] = style->stroke_dash.dash[i] * scale;
  67             }
  68             int    nbD=dash.n_dash;
  69             float  *dashs=(float*)malloc((nbD+1)*sizeof(float));
  70             while ( dash.offset >= dlen ) dash.offset-=dlen;
  71             dashs[0]=dash.dash[0];
  72             for (int i=1; i<nbD; i++) {
  73                 dashs[i]=dashs[i-1]+dash.dash[i];
  74             }
  75             // modulo dlen
  76             this->DashPolyline(0.0, 0.0, dlen, nbD, dashs, true, dash.offset);
  77             free(dashs);
  78             g_free(dash.dash);
  79         }
  80     }
  81 }
  82
  83
  84 void Path::DashSubPath(int spL, int spP, std::vector<path_lineto> const &orig_pts, float head,float tail,float body,int nbD,float *dashs,bool stPlain,float stOffset)
  85 {
  86   if ( spL <= 0 || spP == -1 ) return;
  87
  88   double      totLength=0;
  89   NR::Point   lastP;
  90   lastP = orig_pts[spP].p;
  91   for (int i=1;i<spL;i++) {
  92     NR::Point const n = orig_pts[spP + i].p;
  93     NR::Point d=n-lastP;
  94     double    nl=NR::L2(d);
  95     if ( nl > 0.0001 ) {
  96       totLength+=nl;
  97       lastP=n;
  98     }
  99   }
 100
 101   if ( totLength <= head+tail ) return; // tout mange par la tete et la queue
 102
 103   double    curLength=0;
 104   double    dashPos=0;
 105   int       dashInd=0;
 106   bool      dashPlain=false;
 107   double    lastT=0;
 108   int       lastPiece=-1;
 109   lastP = orig_pts[spP].p;
 110   for (int i=1;i<spL;i++) {
 111     NR::Point   n;
 112     int         nPiece=-1;
 113     double      nT=0;
 114     if ( back ) {
 115       n = orig_pts[spP + i].p;
 116       nPiece = orig_pts[spP + i].piece;
 117       nT = orig_pts[spP + i].t;
 118     } else {
 119       n = orig_pts[spP + i].p;
 120     }
 121     NR::Point d=n-lastP;
 122     double    nl=NR::L2(d);
 123     if ( nl > 0.0001 ) {
 124       double   stLength=curLength;
 125       double   enLength=curLength+nl;
 126       // couper les bouts en trop
 127       if ( curLength <= head && curLength+nl > head ) {
 128         nl-=head-curLength;
 129         curLength=head;
 130         dashInd=0;
 131         dashPos=stOffset;
 132         bool nPlain=stPlain;
 133         while ( dashs[dashInd] < stOffset ) {
 134           dashInd++;
 135           nPlain=!(nPlain);
 136           if ( dashInd >= nbD ) {
 137             dashPos=0;
 138             dashInd=0;
 139             break;
 140           }
 141         }
 142         if ( nPlain == true && dashPlain == false ) {
 143           NR::Point  p=(enLength-curLength)*lastP+(curLength-stLength)*n;
 144           p/=(enLength-stLength);
 145           if ( back ) {
 146             double pT=0;
 147             if ( nPiece == lastPiece ) {
 148               pT=(lastT*(enLength-curLength)+nT*(curLength-stLength))/(enLength-stLength);
 149             } else {
 150               pT=(nPiece*(curLength-stLength))/(enLength-stLength);
 151             }
 152             AddPoint(p,nPiece,pT,true);
 153           } else {
 154             AddPoint(p,true);
 155           }
 156         } else if ( nPlain == false && dashPlain == true ) {
 157         }
 158         dashPlain=nPlain;
 159       }
 160       // faire les tirets
 161       if ( curLength >= head /*&& curLength+nl <= totLength-tail*/ ) {
 162         while ( curLength <= totLength-tail && nl > 0 ) {
 163           if ( enLength <= totLength-tail ) nl=enLength-curLength; else nl=totLength-tail-curLength;
 164           double  leftInDash=body-dashPos;
 165           if ( dashInd < nbD ) {
 166             leftInDash=dashs[dashInd]-dashPos;
 167           }
 168           if ( leftInDash <= nl ) {
 169             bool nPlain=false;
 170             if ( dashInd < nbD ) {
 171               dashPos=dashs[dashInd];
 172               dashInd++;
 173               if ( dashPlain ) nPlain=false; else nPlain=true;
 174             } else {
 175               dashInd=0;
 176               dashPos=0;
 177               //nPlain=stPlain;
 178               nPlain=dashPlain;
 179             }
 180             if ( nPlain == true && dashPlain == false ) {
 181               NR::Point  p=(enLength-curLength-leftInDash)*lastP+(curLength+leftInDash-stLength)*n;
 182               p/=(enLength-stLength);
 183               if ( back ) {
 184                 double pT=0;
 185                 if ( nPiece == lastPiece ) {
 186                   pT=(lastT*(enLength-curLength-leftInDash)+nT*(curLength+leftInDash-stLength))/(enLength-stLength);
 187                 } else {
 188                   pT=(nPiece*(curLength+leftInDash-stLength))/(enLength-stLength);
 189                 }
 190                 AddPoint(p,nPiece,pT,true);
 191               } else {
 192                 AddPoint(p,true);
 193               }
 194             } else if ( nPlain == false && dashPlain == true ) {
 195               NR::Point  p=(enLength-curLength-leftInDash)*lastP+(curLength+leftInDash-stLength)*n;
 196               p/=(enLength-stLength);
 197               if ( back ) {
 198                 double pT=0;
 199                 if ( nPiece == lastPiece ) {
 200                   pT=(lastT*(enLength-curLength-leftInDash)+nT*(curLength+leftInDash-stLength))/(enLength-stLength);
 201                 } else {
 202                   pT=(nPiece*(curLength+leftInDash-stLength))/(enLength-stLength);
 203                 }
 204                 AddPoint(p,nPiece,pT,false);
 205               } else {
 206                 AddPoint(p,false);
 207               }
 208             }
 209             dashPlain=nPlain;
 210
 211             curLength+=leftInDash;
 212             nl-=leftInDash;
 213           } else {
 214             dashPos+=nl;
 215             curLength+=nl;
 216             nl=0;
 217           }
 218         }
 219         if ( dashPlain ) {
 220           if ( back ) {
 221             AddPoint(n,nPiece,nT,false);
 222           } else {
 223             AddPoint(n,false);
 224           }
 225         }
 226         nl=enLength-curLength;
 227       }
 228       if ( curLength <= totLength-tail && curLength+nl > totLength-tail ) {
 229         nl=totLength-tail-curLength;
 230         dashInd=0;
 231         dashPos=0;
 232         bool nPlain=false;
 233         if ( nPlain == true && dashPlain == false ) {
 234         } else if ( nPlain == false && dashPlain == true ) {
 235           NR::Point  p=(enLength-curLength)*lastP+(curLength-stLength)*n;
 236           p/=(enLength-stLength);
 237           if ( back ) {
 238             double pT=0;
 239             if ( nPiece == lastPiece ) {
 240               pT=(lastT*(enLength-curLength)+nT*(curLength-stLength))/(enLength-stLength);
 241             } else {
 242               pT=(nPiece*(curLength-stLength))/(enLength-stLength);
 243             }
 244             AddPoint(p,nPiece,pT,false);
 245           } else {
 246             AddPoint(p,false);
 247           }
 248         }
 249         dashPlain=nPlain;
 250       }
 251       // continuer
 252       curLength=enLength;
 253       lastP=n;
 254       lastPiece=nPiece;
 255       lastT=nT;
 256     }
 257   }
 258 }
 259 #include "../display/canvas-bpath.h"
 260
 261 void* Path::MakeArtBPath(void)
 262 {
 263         int                              nb_cmd=0,max_cmd=0;
 264         NArtBpath* bpath=(NArtBpath*)g_malloc((max_cmd+1)*sizeof(NArtBpath));
 265
 266         NR::Point   lastP,bezSt,bezEn,lastMP;
 267         int         lastM=-1,bezNb=0;
 268   for (int i=0;i<int(descr_cmd.size());i++) {
 269     int const typ = descr_cmd[i]->getType();
 270     switch ( typ ) {
 271       case descr_close:
 272       {
 273                                 if ( lastM >= 0 ) {
 274                                         bpath[lastM].code=NR_MOVETO;
 275                                         if ( nb_cmd >= max_cmd ) {
 276                                                 max_cmd=2*nb_cmd+1;
 277                                                 bpath=(NArtBpath*)g_realloc(bpath,(max_cmd+1)*sizeof(NArtBpath));
 278                                         }
 279                                         bpath[nb_cmd].code=NR_LINETO;
 280                                         bpath[nb_cmd].x3=lastMP[0];
 281                                         bpath[nb_cmd].y3=lastMP[1];
 282                                         nb_cmd++;
 283                                 }
 284                                 lastM=-1;
 285                         }
 286                                 break;
 287                         case descr_lineto:
 288                                 {
 289         PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[i]);
 290                                 if ( nb_cmd >= max_cmd ) {
 291                                         max_cmd=2*nb_cmd+1;
 292                                         bpath=(NArtBpath*)g_realloc(bpath,(max_cmd+1)*sizeof(NArtBpath));
 293                                 }
 294                                 bpath[nb_cmd].code=NR_LINETO;
 295                                 bpath[nb_cmd].x3=nData->p[0];
 296                                 bpath[nb_cmd].y3=nData->p[1];
 297                                 nb_cmd++;
 298                                 lastP=nData->p;
 299       }
 300         break;
 301       case descr_moveto:
 302       {
 303         PathDescrMoveTo *nData = dynamic_cast<PathDescrMoveTo *>(descr_cmd[i]);
 304                                 if ( nb_cmd >= max_cmd ) {
 305                                         max_cmd=2*nb_cmd+1;
 306                                         bpath=(NArtBpath*)g_realloc(bpath,(max_cmd+1)*sizeof(NArtBpath));
 307                                 }
 308                                 bpath[nb_cmd].code=NR_MOVETO_OPEN;
 309                                 bpath[nb_cmd].x3=nData->p[0];
 310                                 bpath[nb_cmd].y3=nData->p[1];
 311                                 lastM=nb_cmd;
 312                                 nb_cmd++;
 313                                 lastP=lastMP=nData->p;
 314       }
 315         break;
 316       case descr_arcto:
 317       {
 318         PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[i]);
 319                                 lastP=nData->p;
 320       }
 321         break;
 322       case descr_cubicto:
 323       {
 324         PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[i]);
 325                                 if ( nb_cmd >= max_cmd ) {
 326                                         max_cmd=2*nb_cmd+1;
 327                                         bpath=(NArtBpath*)g_realloc(bpath,(max_cmd+1)*sizeof(NArtBpath));
 328                                 }
 329                                 bpath[nb_cmd].code=NR_CURVETO;
 330                                 bpath[nb_cmd].x1=lastP[0]+0.333333*nData->start[0];
 331                                 bpath[nb_cmd].y1=lastP[1]+0.333333*nData->start[1];
 332                                 bpath[nb_cmd].x2=nData->p[0]-0.333333*nData->end[0];
 333                                 bpath[nb_cmd].y2=nData->p[1]-0.333333*nData->end[1];
 334                                 bpath[nb_cmd].x3=nData->p[0];
 335                                 bpath[nb_cmd].y3=nData->p[1];
 336                                 nb_cmd++;
 337                                 lastP=nData->p;
 338       }
 339         break;
 340       case descr_bezierto:
 341       {
 342         PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[i]);
 343                                 if ( nb_cmd >= max_cmd ) {
 344                                         max_cmd=2*nb_cmd+1;
 345                                         bpath=(NArtBpath*)g_realloc(bpath,(max_cmd+1)*sizeof(NArtBpath));
 346                                 }
 347                                 if ( nData->nb <= 0 ) {
 348                                         bpath[nb_cmd].code=NR_LINETO;
 349                                         bpath[nb_cmd].x3=nData->p[0];
 350                                         bpath[nb_cmd].y3=nData->p[1];
 351                                         nb_cmd++;
 352                                         bezNb=0;
 353                                 } else if ( nData->nb == 1 ){
 354                                         PathDescrIntermBezierTo *iData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i+1]);
 355                                         bpath[nb_cmd].code=NR_CURVETO;
 356                                         bpath[nb_cmd].x1=0.333333*(lastP[0]+2*iData->p[0]);
 357                                         bpath[nb_cmd].y1=0.333333*(lastP[1]+2*iData->p[1]);
 358                                         bpath[nb_cmd].x2=0.333333*(nData->p[0]+2*iData->p[0]);
 359                                         bpath[nb_cmd].y2=0.333333*(nData->p[1]+2*iData->p[1]);
 360                                         bpath[nb_cmd].x3=nData->p[0];
 361                                         bpath[nb_cmd].y3=nData->p[1];
 362                                         nb_cmd++;
 363                                         bezNb=0;
 364                                 } else {
 365                                         bezSt=2*lastP-nData->p;
 366                                         bezEn=nData->p;
 367                                         bezNb=nData->nb;
 368                                 }
 369                                 lastP=nData->p;
 370       }
 371         break;
 372       case descr_interm_bezier:
 373       {
 374                                 if ( bezNb > 0 ) {
 375                                         PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i]);
 376                                         NR::Point p_m=nData->p,p_s=0.5*(bezSt+p_m),p_e;
 377                                         if ( bezNb > 1 ) {
 378                                                 PathDescrIntermBezierTo *iData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i+1]);
 379                                                 p_e=0.5*(p_m+iData->p);
 380                                         } else {
 381                                                 p_e=bezEn;
 382                                         }
 383
 384                                         if ( nb_cmd >= max_cmd ) {
 385                                                 max_cmd=2*nb_cmd+1;
 386                                                 bpath=(NArtBpath*)g_realloc(bpath,(max_cmd+1)*sizeof(NArtBpath));
 387                                         }
 388                                         bpath[nb_cmd].code=NR_CURVETO;
 389                                         NR::Point  cp1=0.333333*(p_s+2*p_m),cp2=0.333333*(2*p_m+p_e);
 390                                         bpath[nb_cmd].x1=cp1[0];
 391                                         bpath[nb_cmd].y1=cp1[1];
 392                                         bpath[nb_cmd].x2=cp2[0];
 393                                         bpath[nb_cmd].y2=cp2[1];
 394                                         bpath[nb_cmd].x3=p_e[0];
 395                                         bpath[nb_cmd].y3=p_e[1];
 396                                         nb_cmd++;
 397
 398                                         bezNb--;
 399                                 }
 400                         }
 401         break;
 402     }
 403   }
 404         bpath[nb_cmd].code=NR_END;
 405         return bpath;
 406 }
 407
 408 void  Path::LoadArtBPath(void *iV,NR::Matrix const &trans,bool doTransformation)
 409 {
 410   if ( iV == NULL ) return;
 411   NArtBpath *bpath = (NArtBpath*)iV;
 412
 413   SetBackData (false);
 414   Reset();
 415   {
 416     int   i;
 417     bool  closed = false;
 418     NR::Point lastX(0,0);
 419
 420     for (i = 0; bpath[i].code != NR_END; i++)
 421     {
 422       switch (bpath[i].code)
 423       {
 424         case NR_LINETO:
 425           lastX[0] = bpath[i].x3;
 426           lastX[1] = bpath[i].y3;
 427           if ( doTransformation ) {
 428             lastX*=trans;
 429           }
 430             LineTo (lastX);
 431             break;
 432
 433         case NR_CURVETO:
 434         {
 435           NR::Point  tmp,tms(0,0),tme(0,0),tm1,tm2;
 436           tmp[0]=bpath[i].x3;
 437           tmp[1]=bpath[i].y3;
 438           tm1[0]=bpath[i].x1;
 439           tm1[1]=bpath[i].y1;
 440           tm2[0]=bpath[i].x2;
 441           tm2[1]=bpath[i].y2;
 442           if ( doTransformation ) {
 443             tmp*=trans;
 444             tm1*=trans;
 445             tm2*=trans;
 446           }
 447           tms=3 * (tm1 - lastX);
 448           tme=3 * (tmp - tm2);
 449           CubicTo (tmp,tms,tme);
 450         }
 451           lastX[0] = bpath[i].x3;
 452           lastX[1] = bpath[i].y3;
 453           if ( doTransformation ) {
 454             lastX*=trans;
 455           }
 456           break;
 457
 458         case NR_MOVETO_OPEN:
 459         case NR_MOVETO:
 460           if (closed) Close ();
 461           closed = (bpath[i].code == NR_MOVETO);
 462           lastX[0] = bpath[i].x3;
 463           lastX[1] = bpath[i].y3;
 464           if ( doTransformation ) {
 465             lastX*=trans;
 466           }
 467             MoveTo (lastX);
 468             break;
 469         default:
 470           break;
 471       }
 472     }
 473     if (closed) Close ();
 474   }
 475 }
 476
 477
 478 /**
 479  *    \return Length of the lines in the pts vector.
 480  */
 481
 482 double Path::Length()
 483 {
 484     if ( pts.empty() ) {
 485         return 0;
 486     }
 487
 488     NR::Point lastP = pts[0].p;
 489
 490     double len = 0;
 491     for (std::vector<path_lineto>::const_iterator i = pts.begin(); i != pts.end(); i++) {
 492
 493         if ( i->isMoveTo != polyline_moveto ) {
 494             len += NR::L2(i->p - lastP);
 495         }
 496
 497         lastP = i->p;
 498     }
 499
 500     return len;
 501 }
 502
 503
 504 double Path::Surface()
 505 {
 506     if ( pts.empty() ) {
 507         return 0;
 508     }
 509
 510     NR::Point lastM = pts[0].p;
 511     NR::Point lastP = lastM;
 512
 513     double surf = 0;
 514     for (std::vector<path_lineto>::const_iterator i = pts.begin(); i != pts.end(); i++) {
 515
 516         if ( i->isMoveTo == polyline_moveto ) {
 517             surf += NR::cross(lastM - lastP, lastM);
 518             lastP = lastM = i->p;
 519         } else {
 520             surf += NR::cross(i->p - lastP, i->p);
 521             lastP = i->p;
 522         }
 523
 524     }
 525
 526   return surf;
 527 }
 528
 529
 530 Path**      Path::SubPaths(int &outNb,bool killNoSurf)
 531 {
 532   int      nbRes=0;
 533   Path**   res=NULL;
 534   Path*    curAdd=NULL;
 535
 536   for (int i=0;i<int(descr_cmd.size());i++) {
 537     int const typ = descr_cmd[i]->getType();
 538     switch ( typ ) {
 539       case descr_moveto:
 540         if ( curAdd ) {
 541           if ( curAdd->descr_cmd.size() > 1 ) {
 542             curAdd->Convert(1.0);
 543             double addSurf=curAdd->Surface();
 544             if ( fabs(addSurf) > 0.0001 || killNoSurf == false ) {
 545               res=(Path**)g_realloc(res,(nbRes+1)*sizeof(Path*));
 546               res[nbRes++]=curAdd;
 547             } else {
 548               delete curAdd;
 549             }
 550           } else {
 551             delete curAdd;
 552           }
 553           curAdd=NULL;
 554         }
 555         curAdd=new Path;
 556         curAdd->SetBackData(false);
 557         {
 558           PathDescrMoveTo *nData = dynamic_cast<PathDescrMoveTo *>(descr_cmd[i]);
 559           curAdd->MoveTo(nData->p);
 560         }
 561           break;
 562       case descr_close:
 563       {
 564         curAdd->Close();
 565       }
 566         break;
 567       case descr_lineto:
 568       {
 569         PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[i]);
 570         curAdd->LineTo(nData->p);
 571       }
 572         break;
 573       case descr_cubicto:
 574       {
 575         PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[i]);
 576         curAdd->CubicTo(nData->p,nData->start,nData->end);
 577       }
 578         break;
 579       case descr_arcto:
 580       {
 581         PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[i]);
 582         curAdd->ArcTo(nData->p,nData->rx,nData->ry,nData->angle,nData->large,nData->clockwise);
 583       }
 584         break;
 585       case descr_bezierto:
 586       {
 587         PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[i]);
 588         curAdd->BezierTo(nData->p);
 589       }
 590         break;
 591       case descr_interm_bezier:
 592       {
 593         PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i]);
 594         curAdd->IntermBezierTo(nData->p);
 595       }
 596         break;
 597       default:
 598         break;
 599     }
 600   }
 601   if ( curAdd ) {
 602     if ( curAdd->descr_cmd.size() > 1 ) {
 603       curAdd->Convert(1.0);
 604       double addSurf=curAdd->Surface();
 605       if ( fabs(addSurf) > 0.0001 || killNoSurf == false  ) {
 606         res=(Path**)g_realloc(res,(nbRes+1)*sizeof(Path*));
 607         res[nbRes++]=curAdd;
 608       } else {
 609         delete curAdd;
 610       }
 611     } else {
 612       delete curAdd;
 613     }
 614   }
 615   curAdd=NULL;
 616
 617   outNb=nbRes;
 618   return res;
 619 }
 620 Path**      Path::SubPathsWithNesting(int &outNb,bool killNoSurf,int nbNest,int* nesting,int* conts)
 621 {
 622   int      nbRes=0;
 623   Path**   res=NULL;
 624   Path*    curAdd=NULL;
 625   bool     increment=false;
 626
 627   for (int i=0;i<int(descr_cmd.size());i++) {
 628     int const typ = descr_cmd[i]->getType();
 629     switch ( typ ) {
 630       case descr_moveto:
 631       {
 632         if ( curAdd && increment == false ) {
 633           if ( curAdd->descr_cmd.size() > 1 ) {
 634             // sauvegarder descr_cmd[0]->associated
 635             int savA=curAdd->descr_cmd[0]->associated;
 636             curAdd->Convert(1.0);
 637             curAdd->descr_cmd[0]->associated=savA; // associated n'est pas utilise apres
 638             double addSurf=curAdd->Surface();
 639             if ( fabs(addSurf) > 0.0001 || killNoSurf == false ) {
 640               res=(Path**)g_realloc(res,(nbRes+1)*sizeof(Path*));
 641               res[nbRes++]=curAdd;
 642             } else {
 643               delete curAdd;
 644             }
 645           } else {
 646             delete curAdd;
 647           }
 648           curAdd=NULL;
 649         }
 650         Path*  hasDad=NULL;
 651         for (int j=0;j<nbNest;j++) {
 652           if ( conts[j] == i && nesting[j] >= 0 ) {
 653             int  dadMvt=conts[nesting[j]];
 654             for (int k=0;k<nbRes;k++) {
 655               if ( res[k] && res[k]->descr_cmd.empty() == false && res[k]->descr_cmd[0]->associated == dadMvt ) {
 656                 hasDad=res[k];
 657                 break;
 658               }
 659             }
 660           }
 661           if ( conts[j] > i  ) break;
 662         }
 663         if ( hasDad ) {
 664           curAdd=hasDad;
 665           increment=true;
 666         } else {
 667           curAdd=new Path;
 668           curAdd->SetBackData(false);
 669           increment=false;
 670         }
 671         PathDescrMoveTo *nData = dynamic_cast<PathDescrMoveTo *>(descr_cmd[i]);
 672         int mNo=curAdd->MoveTo(nData->p);
 673         curAdd->descr_cmd[mNo]->associated=i;
 674         }
 675         break;
 676       case descr_close:
 677       {
 678         curAdd->Close();
 679       }
 680         break;
 681       case descr_lineto:
 682       {
 683         PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[i]);
 684         curAdd->LineTo(nData->p);
 685       }
 686         break;
 687       case descr_cubicto:
 688       {
 689         PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[i]);
 690         curAdd->CubicTo(nData->p,nData->start,nData->end);
 691       }
 692         break;
 693       case descr_arcto:
 694       {
 695         PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[i]);
 696         curAdd->ArcTo(nData->p,nData->rx,nData->ry,nData->angle,nData->large,nData->clockwise);
 697       }
 698         break;
 699       case descr_bezierto:
 700       {
 701         PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[i]);
 702         curAdd->BezierTo(nData->p);
 703       }
 704         break;
 705       case descr_interm_bezier:
 706       {
 707         PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i]);
 708         curAdd->IntermBezierTo(nData->p);
 709       }
 710         break;
 711       default:
 712         break;
 713     }
 714   }
 715   if ( curAdd && increment == false ) {
 716     if ( curAdd->descr_cmd.size() > 1 ) {
 717       curAdd->Convert(1.0);
 718       double addSurf=curAdd->Surface();
 719       if ( fabs(addSurf) > 0.0001 || killNoSurf == false  ) {
 720         res=(Path**)g_realloc(res,(nbRes+1)*sizeof(Path*));
 721         res[nbRes++]=curAdd;
 722       } else {
 723         delete curAdd;
 724       }
 725     } else {
 726       delete curAdd;
 727     }
 728   }
 729   curAdd=NULL;
 730
 731   outNb=nbRes;
 732   return res;
 733 }
 734
 735
 736 void Path::ConvertForcedToVoid()
 737 {
 738     for (int i=0; i < int(descr_cmd.size()); i++) {
 739         if ( descr_cmd[i]->getType() == descr_forced) {
 740             delete descr_cmd[i];
 741             descr_cmd.erase(descr_cmd.begin() + i);
 742         }
 743     }
 744 }
 745
 746
 747 void Path::ConvertForcedToMoveTo()
 748 {
 749     NR::Point lastSeen(0, 0);
 750     NR::Point lastMove(0, 0);
 751
 752     {
 753         NR::Point lastPos(0, 0);
 754         for (int i = int(descr_cmd.size()) - 1; i >= 0; i--) {
 755             int const typ = descr_cmd[i]->getType();
 756             switch ( typ ) {
 757             case descr_forced:
 758             {
 759                 PathDescrForced *d = dynamic_cast<PathDescrForced *>(descr_cmd[i]);
 760                 d->p = lastPos;
 761                 break;
 762             }
 763             case descr_close:
 764             {
 765                 PathDescrClose *d = dynamic_cast<PathDescrClose *>(descr_cmd[i]);
 766                 d->p = lastPos;
 767                 break;
 768             }
 769             case descr_moveto:
 770             {
 771                 PathDescrMoveTo *d = dynamic_cast<PathDescrMoveTo *>(descr_cmd[i]);
 772                 lastPos = d->p;
 773                 break;
 774             }
 775             case descr_lineto:
 776             {
 777                 PathDescrLineTo *d = dynamic_cast<PathDescrLineTo *>(descr_cmd[i]);
 778                 lastPos = d->p;
 779                 break;
 780             }
 781             case descr_arcto:
 782             {
 783                 PathDescrArcTo *d = dynamic_cast<PathDescrArcTo *>(descr_cmd[i]);
 784                 lastPos = d->p;
 785                 break;
 786             }
 787             case descr_cubicto:
 788             {
 789                 PathDescrCubicTo *d = dynamic_cast<PathDescrCubicTo *>(descr_cmd[i]);
 790                 lastPos = d->p;
 791                 break;
 792             }
 793             case descr_bezierto:
 794             {
 795                 PathDescrBezierTo *d = dynamic_cast<PathDescrBezierTo *>(descr_cmd[i]);
 796                 lastPos = d->p;
 797                 break;
 798             }
 799             case descr_interm_bezier:
 800             {
 801                 PathDescrIntermBezierTo *d = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i]);
 802                 lastPos = d->p;
 803                 break;
 804             }
 805             default:
 806                 break;
 807             }
 808         }
 809     }
 810
 811     bool hasMoved = false;
 812     for (int i = 0; i < int(descr_cmd.size()); i++) {
 813         int const typ = descr_cmd[i]->getType();
 814         switch ( typ ) {
 815         case descr_forced:
 816             if ( i < int(descr_cmd.size()) - 1 && hasMoved ) { // sinon il termine le chemin
 817
 818                 delete descr_cmd[i];
 819                 descr_cmd[i] = new PathDescrMoveTo(lastSeen);
 820                 lastMove = lastSeen;
 821                 hasMoved = true;
 822             }
 823             break;
 824
 825         case descr_moveto:
 826         {
 827           PathDescrMoveTo *nData = dynamic_cast<PathDescrMoveTo *>(descr_cmd[i]);
 828           lastMove = lastSeen = nData->p;
 829           hasMoved = true;
 830         }
 831         break;
 832       case descr_close:
 833       {
 834         lastSeen=lastMove;
 835       }
 836         break;
 837       case descr_lineto:
 838       {
 839         PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[i]);
 840         lastSeen=nData->p;
 841       }
 842         break;
 843       case descr_cubicto:
 844       {
 845         PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[i]);
 846         lastSeen=nData->p;
 847      }
 848         break;
 849       case descr_arcto:
 850       {
 851         PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[i]);
 852         lastSeen=nData->p;
 853       }
 854         break;
 855       case descr_bezierto:
 856       {
 857         PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[i]);
 858         lastSeen=nData->p;
 859      }
 860         break;
 861       case descr_interm_bezier:
 862       {
 863         PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i]);
 864         lastSeen=nData->p;
 865       }
 866         break;
 867       default:
 868         break;
 869     }
 870   }
 871 }
 872 static int       CmpPosition(const void * p1, const void * p2) {
 873   Path::cut_position *cp1=(Path::cut_position*)p1;
 874   Path::cut_position *cp2=(Path::cut_position*)p2;
 875   if ( cp1->piece < cp2->piece ) return -1;
 876   if ( cp1->piece > cp2->piece ) return 1;
 877   if ( cp1->t < cp2->t ) return -1;
 878   if ( cp1->t > cp2->t ) return 1;
 879   return 0;
 880 }
 881 static int       CmpCurv(const void * p1, const void * p2) {
 882   double *cp1=(double*)p1;
 883   double *cp2=(double*)p2;
 884   if ( *cp1 < *cp2 ) return -1;
 885   if ( *cp1 > *cp2 ) return 1;
 886   return 0;
 887 }
 888
 889
 890 Path::cut_position* Path::CurvilignToPosition(int nbCv, double *cvAbs, int &nbCut)
 891 {
 892     if ( nbCv <= 0 || pts.empty() || back == false ) {
 893         return NULL;
 894     }
 895
 896     qsort(cvAbs, nbCv, sizeof(double), CmpCurv);
 897
 898     cut_position *res = NULL;
 899     nbCut = 0;
 900     int curCv = 0;
 901
 902     double len = 0;
 903     double lastT = 0;
 904     int lastPiece = -1;
 905
 906     NR::Point lastM = pts[0].p;
 907     NR::Point lastP = lastM;
 908
 909     for (std::vector<path_lineto>::const_iterator i = pts.begin(); i != pts.end(); i++) {
 910
 911         if ( i->isMoveTo == polyline_moveto ) {
 912
 913             lastP = lastM = i->p;
 914             lastT = i->t;
 915             lastPiece = i->piece;
 916
 917         } else {
 918
 919             double const add = NR::L2(i->p - lastP);
 920             double curPos = len;
 921             double curAdd = add;
 922
 923             while ( curAdd > 0.0001 && curCv < nbCv && curPos + curAdd >= cvAbs[curCv] ) {
 924                 double const theta = (cvAbs[curCv] - len) / add;
 925                 res = (cut_position*) g_realloc(res, (nbCut + 1) * sizeof(cut_position));
 926                 res[nbCut].piece = i->piece;
 927                 res[nbCut].t = theta * i->t + (1 - theta) * ( (lastPiece != i->piece) ? 0 : lastT);
 928                 nbCut++;
 929                 curAdd -= cvAbs[curCv] - curPos;
 930                 curPos = cvAbs[curCv];
 931                 curCv++;
 932             }
 933
 934             len += add;
 935             lastPiece = i->piece;
 936             lastP = i->p;
 937             lastT = i->t;
 938         }
 939     }
 940
 941     return res;
 942 }
 943
 944 /*
 945 Moved from Layout-TNG-OutIter.cpp
 946 TODO: clean up uses of the original function and remove
 947
 948 Original Comment:
 949 "this function really belongs to Path. I'll probably move it there eventually,
 950 hence the Path-esque coding style"
 951
 952 */
 953 template<typename T> inline static T square(T x) {return x*x;}
 954 Path::cut_position Path::PointToCurvilignPosition(NR::Point const &pos) const
 955 {
 956     unsigned bestSeg = 0;
 957     double bestRangeSquared = DBL_MAX;
 958     double bestT = 0.0; // you need a sentinel, or make sure that you prime with correct values.
 959
 960     for (unsigned i = 1 ; i < pts.size() ; i++) {
 961         if (pts[i].isMoveTo == polyline_moveto) continue;
 962         NR::Point p1, p2, localPos;
 963         double thisRangeSquared;
 964         double t;
 965
 966         if (pts[i - 1].p == pts[i].p) {
 967             thisRangeSquared = square(pts[i].p[NR::X] - pos[NR::X]) + square(pts[i].p[NR::Y] - pos[NR::Y]);
 968             t = 0.0;
 969         } else {
 970             // we rotate all our coordinates so we're always looking at a mostly vertical line.
 971             if (fabs(pts[i - 1].p[NR::X] - pts[i].p[NR::X]) < fabs(pts[i - 1].p[NR::Y] - pts[i].p[NR::Y])) {
 972                 p1 = pts[i - 1].p;
 973                 p2 = pts[i].p;
 974                 localPos = pos;
 975             } else {
 976                 p1 = pts[i - 1].p.cw();
 977                 p2 = pts[i].p.cw();
 978                 localPos = pos.cw();
 979             }
 980             double gradient = (p2[NR::X] - p1[NR::X]) / (p2[NR::Y] - p1[NR::Y]);
 981             double intersection = p1[NR::X] - gradient * p1[NR::Y];
 982             /*
 983               orthogonalGradient = -1.0 / gradient; // you are going to have numerical problems here.
 984               orthogonalIntersection = localPos[NR::X] - orthogonalGradient * localPos[NR::Y];
 985               nearestY = (orthogonalIntersection - intersection) / (gradient - orthogonalGradient);
 986
 987               expand out nearestY fully :
 988               nearestY = (localPos[NR::X] - (-1.0 / gradient) * localPos[NR::Y] - intersection) / (gradient - (-1.0 / gradient));
 989
 990               multiply top and bottom by gradient:
 991               nearestY = (localPos[NR::X] * gradient - (-1.0) * localPos[NR::Y] - intersection * gradient) / (gradient * gradient - (-1.0));
 992
 993               and simplify to get:
 994             */
 995             double nearestY =  (localPos[NR::X] * gradient + localPos[NR::Y] - intersection * gradient)
 996                              / (gradient * gradient + 1.0);
 997             t = (nearestY - p1[NR::Y]) / (p2[NR::Y] - p1[NR::Y]);
 998             if (t <= 0.0) {
 999                 thisRangeSquared = square(p1[NR::X] - localPos[NR::X]) + square(p1[NR::Y] - localPos[NR::Y]);
1000                 t = 0.0;
1001             } else if (t >= 1.0) {
1002                 thisRangeSquared = square(p2[NR::X] - localPos[NR::X]) + square(p2[NR::Y] - localPos[NR::Y]);
1003                 t = 1.0;
1004             } else {
1005                 thisRangeSquared = square(nearestY * gradient + intersection - localPos[NR::X]) + square(nearestY - localPos[NR::Y]);
1006             }
1007         }
1008
1009         if (thisRangeSquared < bestRangeSquared) {
1010             bestSeg = i;
1011             bestRangeSquared = thisRangeSquared;
1012             bestT = t;
1013         }
1014     }
1015     Path::cut_position result;
1016     if (bestSeg == 0) {
1017         result.piece = 0;
1018         result.t = 0.0;
1019     } else {
1020         result.piece = pts[bestSeg].piece;
1021         if (result.piece == pts[bestSeg - 1].piece) {
1022             result.t = pts[bestSeg - 1].t * (1.0 - bestT) + pts[bestSeg].t * bestT;
1023         } else {
1024             result.t = pts[bestSeg].t * bestT;
1025         }
1026     }
1027     return result;
1028 }
1029 /*
1030     this one also belongs to Path
1031     returns the length of the path up to the position indicated by t (0..1)
1032
1033     TODO: clean up uses of the original function and remove
1034
1035     should this take a cut_position as a parameter?
1036 */
1037 double Path::PositionToLength(int piece, double t)
1038 {
1039     double length = 0.0;
1040     for (unsigned i = 1 ; i < pts.size() ; i++) {
1041         if (pts[i].isMoveTo == polyline_moveto) continue;
1042         if (pts[i].piece == piece && t < pts[i].t) {
1043             length += NR::L2((t - pts[i - 1].t) / (pts[i].t - pts[i - 1].t) * (pts[i].p - pts[i - 1].p));
1044             break;
1045         }
1046         length += NR::L2(pts[i].p - pts[i - 1].p);
1047     }
1048     return length;
1049 }
1050
1051 void Path::ConvertPositionsToForced(int nbPos, cut_position *poss)
1052 {
1053     if ( nbPos <= 0 ) {
1054         return;
1055     }
1056
1057     {
1058         NR::Point lastPos(0, 0);
1059         for (int i = int(descr_cmd.size()) - 1; i >= 0; i--) {
1060             int const typ = descr_cmd[i]->getType();
1061             switch ( typ ) {
1062
1063             case descr_forced:
1064             {
1065                 PathDescrForced *d = dynamic_cast<PathDescrForced *>(descr_cmd[i]);
1066                 d->p = lastPos;
1067                 break;
1068             }
1069
1070             case descr_close:
1071             {
1072                 delete descr_cmd[i];
1073                 descr_cmd[i] = new PathDescrLineTo(NR::Point(0, 0));
1074
1075                 int fp = i - 1;
1076                 while ( fp >= 0 && (descr_cmd[fp]->getType()) != descr_moveto ) {
1077                     fp--;
1078                 }
1079
1080                 if ( fp >= 0 ) {
1081                     PathDescrMoveTo *oData = dynamic_cast<PathDescrMoveTo *>(descr_cmd[fp]);
1082                     dynamic_cast<PathDescrLineTo*>(descr_cmd[i])->p = oData->p;
1083                 }
1084             }
1085             break;
1086
1087             case descr_bezierto:
1088             {
1089                 PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[i]);
1090                 NR::Point theP = nData->p;
1091                 if ( nData->nb == 0 ) {
1092                     lastPos = theP;
1093                 }
1094             }
1095             break;
1096
1097         case descr_moveto:
1098         {
1099             PathDescrMoveTo *d = dynamic_cast<PathDescrMoveTo *>(descr_cmd[i]);
1100             lastPos = d->p;
1101             break;
1102         }
1103         case descr_lineto:
1104         {
1105             PathDescrLineTo *d = dynamic_cast<PathDescrLineTo *>(descr_cmd[i]);
1106             lastPos = d->p;
1107             break;
1108         }
1109         case descr_arcto:
1110         {
1111             PathDescrArcTo *d = dynamic_cast<PathDescrArcTo *>(descr_cmd[i]);
1112             lastPos = d->p;
1113             break;
1114         }
1115         case descr_cubicto:
1116         {
1117             PathDescrCubicTo *d = dynamic_cast<PathDescrCubicTo *>(descr_cmd[i]);
1118             lastPos = d->p;
1119             break;
1120         }
1121         case descr_interm_bezier:
1122         {
1123             PathDescrIntermBezierTo *d = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i]);
1124             lastPos = d->p;
1125             break;
1126         }
1127         default:
1128           break;
1129       }
1130     }
1131   }
1132
1133   qsort(poss, nbPos, sizeof(cut_position), CmpPosition);
1134
1135   for (int curP=0;curP<nbPos;curP++) {
1136     int   cp=poss[curP].piece;
1137     if ( cp < 0 || cp >= int(descr_cmd.size()) ) break;
1138     float ct=poss[curP].t;
1139     if ( ct < 0 ) continue;
1140     if ( ct > 1 ) continue;
1141
1142     int const typ = descr_cmd[cp]->getType();
1143     if ( typ == descr_moveto || typ == descr_forced || typ == descr_close ) {
1144       // ponctuel= rien a faire
1145     } else if ( typ == descr_lineto || typ == descr_arcto || typ == descr_cubicto ) {
1146       // facile: creation d'un morceau et d'un forced -> 2 commandes
1147       NR::Point        theP;
1148       NR::Point        theT;
1149       NR::Point        startP;
1150       startP=PrevPoint(cp-1);
1151       if ( typ == descr_cubicto ) {
1152         double           len,rad;
1153         NR::Point        stD,enD,endP;
1154         {
1155           PathDescrCubicTo *oData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[cp]);
1156           stD=oData->start;
1157           enD=oData->end;
1158           endP=oData->p;
1159           TangentOnCubAt (ct, startP, *oData,true, theP,theT,len,rad);
1160         }
1161
1162         theT*=len;
1163
1164         InsertCubicTo(endP,(1-ct)*theT,(1-ct)*enD,cp+1);
1165         InsertForcePoint(cp+1);
1166         {
1167           PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[cp]);
1168           nData->start=ct*stD;
1169           nData->end=ct*theT;
1170           nData->p=theP;
1171         }
1172         // decalages dans le tableau des positions de coupe
1173         for (int j=curP+1;j<nbPos;j++) {
1174           if ( poss[j].piece == cp ) {
1175             poss[j].piece+=2;
1176             poss[j].t=(poss[j].t-ct)/(1-ct);
1177           } else {
1178             poss[j].piece+=2;
1179           }
1180         }
1181       } else if ( typ == descr_lineto ) {
1182         NR::Point        endP;
1183         {
1184           PathDescrLineTo *oData = dynamic_cast<PathDescrLineTo *>(descr_cmd[cp]);
1185           endP=oData->p;
1186         }
1187
1188         theP=ct*endP+(1-ct)*startP;
1189
1190         InsertLineTo(endP,cp+1);
1191         InsertForcePoint(cp+1);
1192         {
1193           PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[cp]);
1194           nData->p=theP;
1195         }
1196         // decalages dans le tableau des positions de coupe
1197        for (int j=curP+1;j<nbPos;j++) {
1198           if ( poss[j].piece == cp ) {
1199             poss[j].piece+=2;
1200             poss[j].t=(poss[j].t-ct)/(1-ct);
1201           } else {
1202             poss[j].piece+=2;
1203           }
1204         }
1205       } else if ( typ == descr_arcto ) {
1206         NR::Point        endP;
1207         double           rx,ry,angle;
1208         bool             clockw,large;
1209         double   delta=0;
1210         {
1211           PathDescrArcTo *oData = dynamic_cast<PathDescrArcTo *>(descr_cmd[cp]);
1212           endP=oData->p;
1213           rx=oData->rx;
1214           ry=oData->ry;
1215           angle=oData->angle;
1216           clockw=oData->clockwise;
1217           large=oData->large;
1218         }
1219         {
1220           double      sang,eang;
1221           ArcAngles(startP,endP,rx,ry,angle,large,clockw,sang,eang);
1222
1223           if (clockw) {
1224             if ( sang < eang ) sang += 2*M_PI;
1225             delta=eang-sang;
1226           } else {
1227             if ( sang > eang ) sang -= 2*M_PI;
1228             delta=eang-sang;
1229           }
1230           if ( delta < 0 ) delta=-delta;
1231         }
1232
1233         PointAt (cp,ct, theP);
1234
1235         if ( delta*(1-ct) > M_PI ) {
1236           InsertArcTo(endP,rx,ry,angle,true,clockw,cp+1);
1237         } else {
1238           InsertArcTo(endP,rx,ry,angle,false,clockw,cp+1);
1239         }
1240         InsertForcePoint(cp+1);
1241         {
1242           PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[cp]);
1243           nData->p=theP;
1244           if ( delta*ct > M_PI ) {
1245             nData->clockwise=true;
1246           } else {
1247             nData->clockwise=false;
1248           }
1249         }
1250         // decalages dans le tableau des positions de coupe
1251         for (int j=curP+1;j<nbPos;j++) {
1252           if ( poss[j].piece == cp ) {
1253             poss[j].piece+=2;
1254             poss[j].t=(poss[j].t-ct)/(1-ct);
1255           } else {
1256             poss[j].piece+=2;
1257           }
1258         }
1259       }
1260     } else if ( typ == descr_bezierto || typ == descr_interm_bezier ) {
1261       // dur
1262       int theBDI=cp;
1263       while ( theBDI >= 0 && (descr_cmd[theBDI]->getType()) != descr_bezierto ) theBDI--;
1264       if ( (descr_cmd[theBDI]->getType()) == descr_bezierto ) {
1265         PathDescrBezierTo theBD=*(dynamic_cast<PathDescrBezierTo *>(descr_cmd[theBDI]));
1266         if ( cp >= theBDI && cp < theBDI+theBD.nb ) {
1267           if ( theBD.nb == 1 ) {
1268             NR::Point        endP=theBD.p;
1269             NR::Point        midP;
1270             NR::Point        startP;
1271             startP=PrevPoint(theBDI-1);
1272             {
1273               PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[theBDI+1]);
1274               midP=nData->p;
1275             }
1276             NR::Point       aP=ct*midP+(1-ct)*startP;
1277             NR::Point       bP=ct*endP+(1-ct)*midP;
1278             NR::Point       knotP=ct*bP+(1-ct)*aP;
1279
1280             InsertIntermBezierTo(bP,theBDI+2);
1281             InsertBezierTo(knotP,1,theBDI+2);
1282             InsertForcePoint(theBDI+2);
1283             {
1284               PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[theBDI+1]);
1285               nData->p=aP;
1286             }
1287             {
1288               PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[theBDI]);
1289               nData->p=knotP;
1290             }
1291             // decalages dans le tableau des positions de coupe
1292             for (int j=curP+1;j<nbPos;j++) {
1293               if ( poss[j].piece == cp ) {
1294                 poss[j].piece+=3;
1295                 poss[j].t=(poss[j].t-ct)/(1-ct);
1296               } else {
1297                 poss[j].piece+=3;
1298               }
1299             }
1300
1301           } else {
1302             // decouper puis repasser
1303             if ( cp > theBDI ) {
1304               NR::Point   pcP,ncP;
1305               {
1306                 PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[cp]);
1307                 pcP=nData->p;
1308               }
1309               {
1310                 PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[cp+1]);
1311                 ncP=nData->p;
1312               }
1313               NR::Point knotP=0.5*(pcP+ncP);
1314
1315               InsertBezierTo(knotP,theBD.nb-(cp-theBDI),cp+1);
1316               {
1317                 PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[theBDI]);
1318                 nData->nb=cp-theBDI;
1319               }
1320
1321               // decalages dans le tableau des positions de coupe
1322               for (int j=curP;j<nbPos;j++) {
1323                 if ( poss[j].piece == cp ) {
1324                   poss[j].piece+=1;
1325                 } else {
1326                   poss[j].piece+=1;
1327                 }
1328               }
1329               curP--;
1330             } else {
1331               NR::Point   pcP,ncP;
1332               {
1333                 PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[cp+1]);
1334                 pcP=nData->p;
1335               }
1336               {
1337                 PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[cp+2]);
1338                 ncP=nData->p;
1339               }
1340               NR::Point knotP=0.5*(pcP+ncP);
1341
1342               InsertBezierTo(knotP,theBD.nb-1,cp+2);
1343               {
1344                 PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[theBDI]);
1345                 nData->nb=1;
1346               }
1347
1348               // decalages dans le tableau des positions de coupe
1349               for (int j=curP;j<nbPos;j++) {
1350                 if ( poss[j].piece == cp ) {
1351 //                  poss[j].piece+=1;
1352                 } else {
1353                   poss[j].piece+=1;
1354                 }
1355               }
1356               curP--;
1357             }
1358           }
1359         } else {
1360           // on laisse aussi tomber
1361         }
1362       } else {
1363         // on laisse tomber
1364       }
1365     }
1366   }
1367 }
1368
1369 void        Path::ConvertPositionsToMoveTo(int nbPos,cut_position* poss)
1370 {
1371   ConvertPositionsToForced(nbPos,poss);
1372 //  ConvertForcedToMoveTo();
1373   // on fait une version customizee a la place
1374
1375   Path*  res=new Path;
1376
1377   NR::Point    lastP(0,0);
1378   for (int i=0;i<int(descr_cmd.size());i++) {
1379     int const typ = descr_cmd[i]->getType();
1380     if ( typ == descr_moveto ) {
1381       NR::Point  np;
1382       {
1383         PathDescrMoveTo *nData = dynamic_cast<PathDescrMoveTo *>(descr_cmd[i]);
1384         np=nData->p;
1385       }
1386       NR::Point  endP;
1387       bool       hasClose=false;
1388       int        hasForced=-1;
1389       bool       doesClose=false;
1390       int        j=i+1;
1391       for (;j<int(descr_cmd.size());j++) {
1392         int const ntyp = descr_cmd[j]->getType();
1393         if ( ntyp == descr_moveto ) {
1394           j--;
1395           break;
1396         } else if ( ntyp == descr_forced ) {
1397           if ( hasForced < 0 ) hasForced=j;
1398         } else if ( ntyp == descr_close ) {
1399           hasClose=true;
1400           break;
1401         } else if ( ntyp == descr_lineto ) {
1402           PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[j]);
1403           endP=nData->p;
1404         } else if ( ntyp == descr_arcto ) {
1405           PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[j]);
1406           endP=nData->p;
1407         } else if ( ntyp == descr_cubicto ) {
1408           PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[j]);
1409           endP=nData->p;
1410         } else if ( ntyp == descr_bezierto ) {
1411           PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[j]);
1412           endP=nData->p;
1413         } else {
1414         }
1415       }
1416       if ( NR::LInfty(endP-np) < 0.00001 ) {
1417         doesClose=true;
1418       }
1419       if ( ( doesClose || hasClose ) && hasForced >= 0 ) {
1420  //       printf("nasty i=%i j=%i frc=%i\n",i,j,hasForced);
1421         // aghhh.
1422         NR::Point   nMvtP=PrevPoint(hasForced);
1423         res->MoveTo(nMvtP);
1424         NR::Point   nLastP=nMvtP;
1425         for (int k = hasForced + 1; k < j; k++) {
1426           int ntyp=descr_cmd[k]->getType();
1427           if ( ntyp == descr_moveto ) {
1428             // ne doit pas arriver
1429           } else if ( ntyp == descr_forced ) {
1430             res->MoveTo(nLastP);
1431           } else if ( ntyp == descr_close ) {
1432             // rien a faire ici; de plus il ne peut y en avoir qu'un
1433           } else if ( ntyp == descr_lineto ) {
1434             PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[k]);
1435             res->LineTo(nData->p);
1436             nLastP=nData->p;
1437           } else if ( ntyp == descr_arcto ) {
1438             PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[k]);
1439             res->ArcTo(nData->p,nData->rx,nData->ry,nData->angle,nData->large,nData->clockwise);
1440             nLastP=nData->p;
1441           } else if ( ntyp == descr_cubicto ) {
1442             PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[k]);
1443             res->CubicTo(nData->p,nData->start,nData->end);
1444             nLastP=nData->p;
1445           } else if ( ntyp == descr_bezierto ) {
1446             PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[k]);
1447             res->BezierTo(nData->p);
1448             nLastP=nData->p;
1449           } else if ( ntyp == descr_interm_bezier ) {
1450             PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[k]);
1451             res->IntermBezierTo(nData->p);
1452           } else {
1453           }
1454         }
1455         if ( doesClose == false ) res->LineTo(np);
1456         nLastP=np;
1457         for (int k=i+1;k<hasForced;k++) {
1458           int ntyp=descr_cmd[k]->getType();
1459           if ( ntyp == descr_moveto ) {
1460             // ne doit pas arriver
1461           } else if ( ntyp == descr_forced ) {
1462             res->MoveTo(nLastP);
1463           } else if ( ntyp == descr_close ) {
1464             // rien a faire ici; de plus il ne peut y en avoir qu'un
1465           } else if ( ntyp == descr_lineto ) {
1466             PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[k]);
1467             res->LineTo(nData->p);
1468             nLastP=nData->p;
1469           } else if ( ntyp == descr_arcto ) {
1470             PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[k]);
1471             res->ArcTo(nData->p,nData->rx,nData->ry,nData->angle,nData->large,nData->clockwise);
1472             nLastP=nData->p;
1473           } else if ( ntyp == descr_cubicto ) {
1474             PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[k]);
1475             res->CubicTo(nData->p,nData->start,nData->end);
1476             nLastP=nData->p;
1477           } else if ( ntyp == descr_bezierto ) {
1478             PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[k]);
1479             res->BezierTo(nData->p);
1480             nLastP=nData->p;
1481           } else if ( ntyp == descr_interm_bezier ) {
1482             PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[k]);
1483             res->IntermBezierTo(nData->p);
1484           } else {
1485           }
1486         }
1487         lastP=nMvtP;
1488         i=j;
1489       } else {
1490         // regular, just move on
1491         res->MoveTo(np);
1492         lastP=np;
1493       }
1494     } else if ( typ == descr_close ) {
1495       res->Close();
1496     } else if ( typ == descr_forced ) {
1497       res->MoveTo(lastP);
1498     } else if ( typ == descr_lineto ) {
1499       PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(descr_cmd[i]);
1500       res->LineTo(nData->p);
1501       lastP=nData->p;
1502     } else if ( typ == descr_arcto ) {
1503       PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(descr_cmd[i]);
1504       res->ArcTo(nData->p,nData->rx,nData->ry,nData->angle,nData->large,nData->clockwise);
1505       lastP=nData->p;
1506     } else if ( typ == descr_cubicto ) {
1507       PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(descr_cmd[i]);
1508       res->CubicTo(nData->p,nData->start,nData->end);
1509       lastP=nData->p;
1510     } else if ( typ == descr_bezierto ) {
1511       PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[i]);
1512       res->BezierTo(nData->p);
1513       lastP=nData->p;
1514     } else if ( typ == descr_interm_bezier ) {
1515       PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[i]);
1516       res->IntermBezierTo(nData->p);
1517     } else {
1518     }
1519   }
1520
1521   Copy(res);
1522   delete res;
1523   return;
1524 }
1525
1526 /*
1527   Local Variables:
1528   mode:c++
1529   c-file-style:"stroustrup"
1530   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1531   indent-tabs-mode:nil
1532   fill-column:99
1533   End:
1534 */
1535 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :