Shamusworld >> Repos - architektonas/blob - src/base/rs_polyline.cpp

   1 // rs_polyline.cpp
   2 //
   3 // Part of the Architektonas Project
   4 // Originally part of QCad Community Edition by Andrew Mustun
   5 // Extensively rewritten and refactored by James L. Hammons
   6 // (C) 2010 Underground Software
   7 //
   8 // JLH = James L. Hammons <jlhamm@acm.org>
   9 //
  10 // Who  When        What
  11 // ---  ----------  -----------------------------------------------------------
  12 // JLH  06/01/2010  Added this text. :-)
  13 //
  14
  15 #include "rs_polyline.h"
  16
  17 #include "rs_debug.h"
  18 #include "rs_line.h"
  19 #include "rs_arc.h"
  20 #include "rs_graphicview.h"
  21 #include "paintintf.h"
  22
  23 /**
  24  * Constructor.
  25  */
  26 RS_Polyline::RS_Polyline(RS_EntityContainer * parent): RS_EntityContainer(parent),
  27         closingEntity(NULL), nextBulge(0.0)
  28 {
  29 }
  30
  31 /**
  32  * Constructor.
  33  * @param d Polyline data
  34  */
  35 RS_Polyline::RS_Polyline(RS_EntityContainer* parent, const RS_PolylineData& d):
  36         RS_EntityContainer(parent), data(d)
  37 {
  38     closingEntity = NULL;
  39     nextBulge = 0.0;
  40     calculateBorders();
  41 }
  42
  43 /**
  44  * Destructor
  45  */
  46 RS_Polyline::~RS_Polyline()
  47 {
  48 }
  49
  50 /*virtual*/ RS_Entity * RS_Polyline::clone()
  51 {
  52         RS_Polyline * p = new RS_Polyline(*this);
  53 #warning "!!! Need to deal with setAutoDelete() Qt3->Qt4 !!!"
  54 //      p->entities.setAutoDelete(entities.autoDelete());
  55         p->initId();
  56         p->detach();
  57         return p;
  58 }
  59
  60 /**     @return RS2::EntityPolyline */
  61 /*virtual*/ RS2::EntityType RS_Polyline::rtti() const
  62 {
  63         return RS2::EntityPolyline;
  64 }
  65
  66 /** @return Copy of data that defines the polyline. */
  67 RS_PolylineData RS_Polyline::getData() const
  68 {
  69         return data;
  70 }
  71
  72 /** sets a new start point of the polyline */
  73 void RS_Polyline::setStartpoint(Vector & v)
  74 {
  75         data.startpoint = v;
  76
  77         if (!data.endpoint.valid)
  78                 data.endpoint = v;
  79 }
  80
  81 /** @return Start point of the entity */
  82 Vector RS_Polyline::getStartpoint()
  83 {
  84         return data.startpoint;
  85 }
  86
  87 /** sets a new end point of the polyline */
  88 void RS_Polyline::setEndpoint(Vector & v)
  89 {
  90         data.endpoint = v;
  91 }
  92
  93 /** @return End point of the entity */
  94 Vector RS_Polyline::getEndpoint()
  95 {
  96         return data.endpoint;
  97 }
  98
  99 /**
 100  * Removes the last vertex of this polyline.
 101  */
 102 void RS_Polyline::removeLastVertex()
 103 {
 104         RS_Entity * last = lastEntity();
 105
 106         if (last != NULL)
 107         {
 108                 removeEntity(last);
 109                 last = lastEntity();
 110
 111                 if (last != NULL)
 112                 {
 113                         if (last->isAtomic())
 114                                 data.endpoint = ((RS_AtomicEntity*)last)->getEndpoint();
 115                         else
 116                                 RS_DEBUG->print(RS_Debug::D_WARNING, "RS_Polyline::removeLastVertex: "
 117                                         "polyline contains non-atomic entity");
 118                 }
 119         }
 120 }
 121
 122 /**
 123  * Adds a vertex from the endpoint of the last segment or
 124  * from the startpoint of the first segment to 'v' or
 125  * sets the startpoint to the point 'v'.
 126  *
 127  * The very first vertex added with this method is the startpoint.
 128  *
 129  * @param v vertex coordinate to be added
 130  * @param bulge The bulge of the arc or 0 for a line segment (see DXF documentation)
 131  * @param prepend true: prepend at start instead of append at end
 132  *
 133  * @return Pointer to the entity that was addded or NULL if this
 134  *         was the first vertex added.
 135  */
 136 RS_Entity * RS_Polyline::addVertex(const Vector & v, double bulge, bool prepend)
 137 {
 138     RS_Entity * entity = NULL;
 139     //static double nextBulge = 0.0;
 140
 141     // very first vertex:
 142     if (!data.startpoint.valid)
 143         {
 144         data.startpoint = data.endpoint = v;
 145         nextBulge = bulge;
 146     }
 147
 148     // consequent vertices:
 149     else {
 150         // add entity to the polyline:
 151         entity = createVertex(v, nextBulge, prepend);
 152         if (entity!=NULL) {
 153                         if (prepend==false) {
 154                 RS_EntityContainer::addEntity(entity);
 155                                 data.endpoint = v;
 156                         }
 157                         else {
 158                 RS_EntityContainer::insertEntity(0, entity);
 159                                 data.startpoint = v;
 160                         }
 161         }
 162         nextBulge = bulge;
 163         endPolyline();
 164     }
 165     //data.endpoint = v;
 166
 167     return entity;
 168 }
 169
 170
 171
 172 /**
 173  * Creates a vertex from the endpoint of the last element or
 174  * sets the startpoint to the point 'v'.
 175  *
 176  * The very first vertex added is the starting point.
 177  *
 178  * @param v vertex coordinate
 179  * @param bulge The bulge of the arc (see DXF documentation)
 180  * @param prepend true: Prepend instead of append at end
 181  *
 182  * @return Pointer to the entity that was created or NULL if this
 183  *         was the first vertex added.
 184  */
 185 RS_Entity* RS_Polyline::createVertex(const Vector& v, double bulge, bool prepend) {
 186
 187     RS_Entity* entity=NULL;
 188
 189     RS_DEBUG->print("RS_Polyline::createVertex: %f/%f to %f/%f bulge: %f",
 190                     data.endpoint.x, data.endpoint.y, v.x, v.y, bulge);
 191
 192     // create line for the polyline:
 193     if (fabs(bulge)<RS_TOLERANCE) {
 194                 if (prepend==false) {
 195                 entity = new RS_Line(this, RS_LineData(data.endpoint, v));
 196                 }
 197                 else {
 198                 entity = new RS_Line(this, RS_LineData(v, data.startpoint));
 199                 }
 200         entity->setSelected(isSelected());
 201         entity->setPen(RS_Pen(RS2::FlagInvalid));
 202         entity->setLayer(NULL);
 203         //RS_EntityContainer::addEntity(entity);
 204         //data.endpoint = v;
 205     }
 206
 207     // create arc for the polyline:
 208     else {
 209         bool reversed = (bulge<0.0);
 210         double alpha = atan(bulge)*4.0;
 211
 212         double radius;
 213         Vector center;
 214         Vector middle;
 215         double dist;
 216         double angle;
 217
 218                 if (prepend==false) {
 219                 middle = (data.endpoint+v)/2.0;
 220             dist = data.endpoint.distanceTo(v)/2.0;
 221                 angle = data.endpoint.angleTo(v);
 222                 }
 223                 else {
 224                 middle = (data.startpoint+v)/2.0;
 225             dist = data.startpoint.distanceTo(v)/2.0;
 226                 angle = v.angleTo(data.startpoint);
 227                 }
 228
 229         // alpha can't be 0.0 at this point
 230         radius = fabs(dist / sin(alpha/2.0));
 231
 232         double wu = fabs(RS_Math::pow(radius, 2.0) - RS_Math::pow(dist, 2.0));
 233         double h = sqrt(wu);
 234
 235         if (bulge>0.0) {
 236             angle+=M_PI/2.0;
 237         } else {
 238             angle-=M_PI/2.0;
 239         }
 240
 241         if (fabs(alpha)>M_PI) {
 242             h*=-1.0;
 243         }
 244
 245         center.setPolar(h, angle);
 246         center+=middle;
 247
 248                 double a1;
 249                 double a2;
 250
 251                 if (prepend==false) {
 252                         a1 = center.angleTo(data.endpoint);
 253                         a2 = center.angleTo(v);
 254                 }
 255                 else {
 256                         a1 = center.angleTo(v);
 257                         a2 = center.angleTo(data.startpoint);
 258                 }
 259
 260         RS_ArcData d(center, radius,
 261                      a1, a2,
 262                      reversed);
 263
 264         entity = new RS_Arc(this, d);
 265         entity->setSelected(isSelected());
 266         entity->setPen(RS_Pen(RS2::FlagInvalid));
 267         entity->setLayer(NULL);
 268     }
 269
 270     return entity;
 271 }
 272
 273 /**
 274  * Ends polyline and adds the last entity if the polyline is closed
 275  */
 276 void RS_Polyline::endPolyline()
 277 {
 278         RS_DEBUG->print("RS_Polyline::endPolyline");
 279
 280     if (isClosed())
 281         {
 282                 RS_DEBUG->print("RS_Polyline::endPolyline: adding closing entity");
 283
 284         // remove old closing entity:
 285         if (closingEntity!=NULL)
 286                 {
 287             removeEntity(closingEntity);
 288         }
 289
 290         // add closing entity to the polyline:
 291         closingEntity = createVertex(data.startpoint, nextBulge);
 292         if (closingEntity!=NULL)
 293                 {
 294             RS_EntityContainer::addEntity(closingEntity);
 295             //data.endpoint = data.startpoint;
 296         }
 297     }
 298 }
 299
 300 /**
 301  * @return The bulge of the closing entity.
 302  */
 303 double RS_Polyline::getClosingBulge()
 304 {
 305     if (isClosed()) {
 306                 RS_Entity* e = lastEntity();
 307                 if (e!=NULL && e->rtti()==RS2::EntityArc) {
 308                         return ((RS_Arc*)e)->getBulge();
 309                 }
 310         }
 311
 312         return 0.0;
 313 }
 314
 315 /**
 316  * Sets the polylines start and endpoint to match the first and last vertex.
 317  */
 318 void RS_Polyline::updateEndpoints()
 319 {
 320         RS_Entity * e1 = firstEntity();
 321
 322         if (e1 != NULL && e1->isAtomic())
 323         {
 324                 Vector v = ((RS_AtomicEntity *)e1)->getStartpoint();
 325                 setStartpoint(v);
 326         }
 327
 328         RS_Entity * e2 = lastEntity();
 329
 330         if (isClosed())
 331         {
 332                 e2 = prevEntity();
 333         }
 334
 335         if (e2 != NULL && e2->isAtomic())
 336         {
 337                 Vector v = ((RS_AtomicEntity *)e2)->getEndpoint();
 338                 setEndpoint(v);
 339         }
 340 }
 341
 342 /** @return true if the polyline is closed. false otherwise */
 343 bool RS_Polyline::isClosed() const
 344 {
 345         return data.getFlag(RS2::FlagClosed);
 346 }
 347
 348 void RS_Polyline::setClosed(bool cl)
 349 {
 350         if (cl)
 351                 data.setFlag(RS2::FlagClosed);
 352         else
 353                 data.delFlag(RS2::FlagClosed);
 354 }
 355
 356 /**
 357  * Reimplementation of the addEntity method for a normal container.
 358  * This reimplementation deletes the given entity!
 359  *
 360  * To add entities use addVertex() or addSegment() instead.
 361  */
 362 void RS_Polyline::addEntity(RS_Entity * entity)
 363 {
 364         RS_DEBUG->print(RS_Debug::D_WARNING, "RS_Polyline::addEntity: should never be called");
 365
 366         if (entity == NULL)
 367                 return;
 368
 369         delete entity;
 370 }
 371
 372 /*virtual*/ void RS_Polyline::setNextBulge(double bulge)
 373 {
 374         nextBulge = bulge;
 375 }
 376
 377 /**
 378  * Adds a segment to the polyline.
 379  */
 380 /*void RS_Polyline::addSegment(RS_Entity* entity) {
 381         RS_EntityContainer::addEntity(entity);
 382         // TODO: reorder and check polyline
 383 }*/
 384
 385 VectorSolutions RS_Polyline::getRefPoints()
 386 {
 387     VectorSolutions ret(count()+1);
 388
 389     int i=0;
 390     ret.set(0, data.startpoint);
 391         i++;
 392
 393         for (RS_Entity* e=firstEntity(RS2::ResolveNone);
 394             e!=NULL;
 395             e = nextEntity(RS2::ResolveNone), i++) {
 396                 if (e->isAtomic()) {
 397                 ret.set(i, ((RS_AtomicEntity*)e)->getEndpoint());
 398                 }
 399     }
 400
 401         ret.set(count(), data.endpoint);
 402
 403     return ret;
 404 }
 405
 406 Vector RS_Polyline::getNearestRef(const Vector& coord,
 407                                    double* dist) {
 408
 409     return RS_Entity::getNearestRef(coord, dist);
 410 }
 411
 412 Vector RS_Polyline::getNearestSelectedRef(const Vector& coord,
 413         double* dist) {
 414
 415     return RS_Entity::getNearestSelectedRef(coord, dist);
 416 }
 417
 418
 419
 420 /*
 421 void RS_Polyline::reorder() {
 422         // current point:
 423         Vector cp;
 424
 425         bool done = false;
 426         do {
 427
 428         } while(!done);
 429 }
 430 */
 431
 432
 433
 434 void RS_Polyline::move(Vector offset) {
 435     RS_EntityContainer::move(offset);
 436     data.startpoint.move(offset);
 437     data.endpoint.move(offset);
 438 }
 439
 440
 441
 442 void RS_Polyline::rotate(Vector center, double angle) {
 443     RS_EntityContainer::rotate(center, angle);
 444     data.startpoint.rotate(center, angle);
 445     data.endpoint.rotate(center, angle);
 446 }
 447
 448
 449
 450 void RS_Polyline::scale(Vector center, Vector factor) {
 451     RS_EntityContainer::scale(center, factor);
 452     data.startpoint.scale(center, factor);
 453     data.endpoint.scale(center, factor);
 454 }
 455
 456
 457
 458 void RS_Polyline::mirror(Vector axisPoint1, Vector axisPoint2) {
 459     RS_EntityContainer::mirror(axisPoint1, axisPoint2);
 460     data.startpoint.mirror(axisPoint1, axisPoint2);
 461     data.endpoint.mirror(axisPoint1, axisPoint2);
 462 }
 463
 464 void RS_Polyline::moveRef(const Vector & ref, const Vector & offset)
 465 {
 466         RS_EntityContainer::moveRef(ref, offset);
 467
 468         if (ref.distanceTo(data.startpoint) < 1.0e-4)
 469                 data.startpoint.move(offset);
 470
 471         if (ref.distanceTo(data.endpoint) < 1.0e-4)
 472                 data.endpoint.move(offset);
 473
 474         //update();
 475 }
 476
 477 void RS_Polyline::stretch(Vector firstCorner, Vector secondCorner, Vector offset)
 478 {
 479         if (data.startpoint.isInWindow(firstCorner, secondCorner))
 480                 data.startpoint.move(offset);
 481
 482         if (data.endpoint.isInWindow(firstCorner, secondCorner))
 483                 data.endpoint.move(offset);
 484
 485         RS_EntityContainer::stretch(firstCorner, secondCorner, offset);
 486 }
 487
 488 /**
 489  * Slightly optimized drawing for polylines.
 490  */
 491 //void RS_Polyline::draw(RS_Painter * painter, RS_GraphicView * view, double /*patternOffset*/)
 492 void RS_Polyline::draw(PaintInterface * painter, RS_GraphicView * view, double /*patternOffset*/)
 493 {
 494         if (painter == NULL || view == NULL)
 495                 return;
 496
 497         // draw first entity and set correct pen:
 498         RS_Entity * e = firstEntity(RS2::ResolveNone);
 499         view->drawEntity(e);
 500
 501         // draw subsequent entities with same pen:
 502         for(RS_Entity * e=nextEntity(RS2::ResolveNone); e!=NULL; e = nextEntity(RS2::ResolveNone))
 503                 view->drawEntityPlain(e);
 504 }
 505
 506 /**
 507  * Dumps the point's data to stdout.
 508  */
 509 std::ostream & operator<<(std::ostream & os, const RS_Polyline & l)
 510 {
 511         os << " Polyline: " << l.getData() << " {\n";
 512         os << (RS_EntityContainer &)l;
 513         os << "\n}\n";
 514
 515         return os;
 516 }