org.simantics.plant3d/src/org/simantics/plant3d/scenegraph/controlpoint/PipingRules.java

   1 package org.simantics.plant3d.scenegraph.controlpoint;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collection;
   5 import java.util.List;
   6
   7 import javax.vecmath.Point3d;
   8 import javax.vecmath.Quat4d;
   9 import javax.vecmath.Vector3d;
  10
  11 import org.simantics.g3d.math.MathTools;
  12 import org.simantics.plant3d.scenegraph.InlineComponent;
  13 import org.simantics.plant3d.scenegraph.P3DRootNode;
  14 import org.simantics.plant3d.scenegraph.PipeRun;
  15 import org.simantics.plant3d.scenegraph.PipelineComponent;
  16 import org.simantics.plant3d.scenegraph.TurnComponent;
  17 import org.simantics.plant3d.scenegraph.controlpoint.PipeControlPoint.Direction;
  18 import org.simantics.plant3d.utils.ComponentUtils;
  19 import org.simantics.utils.datastructures.Pair;
  20 import org.simantics.utils.ui.ErrorLogger;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 public class PipingRules {
  25         private static final Logger LOGGER = LoggerFactory.getLogger(PipingRules.class);
  26
  27         private static final boolean DUMMY = false;
  28
  29         private static double MIN_TURN_ANGLE = 0.001;    // Threshold for removing turn components.
  30         private static double ALLOWED_OFFSET = 0.001;    // Allowed offset for directed path legs
  31         private static double MIN_INLINE_LENGTH = 0.0005; // Minimum length of inline components, when component removal is not allowed.
  32
  33         private static final int REMOVE_NONE = 0;
  34         private static final int REMOVE_START = 1;
  35         private static final int REMOVE_END = 2;
  36         private static final int REMOVE_BOTH = 3;
  37
  38
  39         // PathLeg iteration indicator. NEXT_S > NEXT > NONE  PREV_S > PREV > NONE
  40         private enum PathLegUpdateType {
  41                 NONE,   // Only current path leg needs to be updated  (for example, inline comp was moved)
  42                 PREV,   // Current and previous path leg need to be updated
  43                 NEXT,   // Current and next path leg need to be updated
  44                 PREV_S, // Current and previous two path legs need to be updated (turn was moved, which affect other path leg end turns, and thus following path legs
  45                 NEXT_S  // Current and next two path legs need to be updated
  46         };
  47
  48         private static boolean enabled = true;  //
  49         private static boolean updating = false;
  50         private static boolean allowInsertRemove = true;
  51         private static boolean triedIR = false;
  52
  53
  54         private static List<PipeControlPoint> requestUpdates = new ArrayList<PipeControlPoint>();
  55         private static List<PipeControlPoint> currentUpdates = new ArrayList<PipeControlPoint>();
  56
  57         private static Object updateMutex = new Object();
  58         private static Object ruleMutex = new Object();
  59
  60         public static void requestUpdate(PipeControlPoint pcp) {
  61             if (!PipingRules.enabled)
  62                 return;
  63                 if (LOGGER.isTraceEnabled()) LOGGER.trace("PipingRules request " + pcp);
  64                 synchronized (updateMutex) {
  65                         if (!requestUpdates.contains(pcp))
  66                                 requestUpdates.add(pcp);
  67                 }
  68         }
  69
  70         public static boolean update() throws Exception {
  71             if (!PipingRules.enabled)
  72                 return false;
  73
  74             List<PipeControlPoint> temp;
  75             synchronized(updateMutex) {
  76                         if (requestUpdates.size() == 0)
  77                                 return false;
  78
  79                         temp = new ArrayList<PipeControlPoint>(requestUpdates.size());
  80                         temp.addAll(requestUpdates);
  81                         requestUpdates.clear();
  82                 }
  83                 synchronized (ruleMutex) {
  84                         currentUpdates.clear();
  85                         currentUpdates.addAll(temp);
  86                         // TODO : we should remove already processed control points from currentUpdates after each _positionUpdate call.
  87                         for (PipeControlPoint pcp : currentUpdates)
  88                                 _positionUpdate(pcp, true);
  89                         currentUpdates.clear();
  90                 }
  91                 synchronized(updateMutex) {
  92                         requestUpdates.removeAll(temp);
  93                 }
  94
  95                 return true;
  96         }
  97
  98         public static boolean positionUpdate(PipeControlPoint pcp) throws Exception {
  99
 100                 return positionUpdate(pcp, true);
 101         }
 102
 103         public static boolean positionUpdate(PipeControlPoint pcp, boolean allowIR) throws Exception {
 104                 synchronized (ruleMutex) {
 105                         currentUpdates.add(pcp);
 106                         boolean b = _positionUpdate(pcp, allowIR);
 107                         currentUpdates.clear();
 108                         return b;
 109                 }
 110
 111         }
 112
 113         private static boolean _positionUpdate(PipeControlPoint pcp, boolean allowIR) throws Exception {
 114                 if (updating || !enabled)
 115                         return true;
 116                 if (pcp.getPipeRun() == null)
 117                         return false;
 118                 try {
 119                         if (LOGGER.isTraceEnabled()) LOGGER.trace("PipingRules " + pcp);
 120                         updating = true;
 121                         allowInsertRemove = allowIR;
 122                         triedIR = false;
 123                         validate(pcp.getPipeRun());
 124                         if (pcp.getParentPoint() != null)
 125                             pcp = pcp.getParentPoint();
 126                         if (pcp.asPathLegEnd()) {
 127                                 updatePathLegEndControlPoint(pcp); // FIXME: Rules won't work properly, if they are not run twice.
 128                                 //updatePathLegEndControlPoint(pcp);
 129                         } else {
 130                                 updateInlineControlPoint(pcp);
 131                                 //updateInlineControlPoint(pcp);
 132                         }
 133                         validate(pcp.getPipeRun());
 134                         if (!allowInsertRemove)
 135                                 return !triedIR;
 136                         return true;
 137                 } finally {
 138                         updating = false;
 139 //                      LOGGER.trace("PipingRules done " + pcp);
 140                 }
 141         }
 142
 143         public static void setEnabled(boolean enabled) {
 144                 PipingRules.enabled = enabled;
 145                 if(!enabled) {
 146                         synchronized (ruleMutex) {
 147                                 currentUpdates.clear();
 148                         }
 149                 }
 150         }
 151
 152         public static boolean isEnabled() {
 153                 return enabled;
 154         }
 155
 156         public static class ExpandIterInfo {
 157                 // these two are turn control points
 158                 private PipeControlPoint start;
 159                 private PipeControlPoint end;
 160                 private int type;
 161
 162                 public ExpandIterInfo() {
 163
 164                 }
 165
 166                 public ExpandIterInfo(PipeControlPoint tcp, int type) {
 167                         if (type == REMOVE_START)
 168                                 start = tcp;
 169                         else
 170                                 end = tcp;
 171                         this.type = type;
 172                 }
 173
 174                 public ExpandIterInfo(PipeControlPoint start, PipeControlPoint end) {
 175                         this.start = start;
 176                         this.end = end;
 177                         this.type = REMOVE_BOTH;
 178                 }
 179
 180                 public PipeControlPoint getEnd() {
 181                         return end;
 182                 }
 183
 184                 public void setEnd(PipeControlPoint end) {
 185                         this.end = end;
 186                 }
 187
 188                 public PipeControlPoint getStart() {
 189                         return start;
 190                 }
 191
 192                 public void setStart(PipeControlPoint start) {
 193                         this.start = start;
 194                 }
 195
 196                 public int getType() {
 197                         return type;
 198                 }
 199
 200                 public void setType(int type) {
 201                         this.type = type;
 202                 }
 203
 204         }
 205
 206         private static void updatePathLegEndControlPoint(PipeControlPoint pcp) throws Exception {
 207                 if (LOGGER.isTraceEnabled())
 208                         LOGGER.trace("PipingRules.updatePathLegEndControlPoint() " + pcp);
 209                 if (pcp.getNext() != null) {
 210                         updatePathLegNext(pcp, pcp, PathLegUpdateType.NEXT_S);
 211                 }
 212                 if (pcp.getPrevious() != null) {
 213                         updatePathLegPrev(pcp, pcp, PathLegUpdateType.PREV_S);
 214                 }
 215
 216         }
 217
 218         private static void updateInlineControlPoint(PipeControlPoint pcp) throws Exception {
 219                 if (LOGGER.isTraceEnabled())
 220                         LOGGER.trace("PipingRules.updateInlineControlPoint() " + pcp);
 221                 PipeControlPoint start = pcp.findPreviousEnd();
 222                 updatePathLegNext(start, pcp, PathLegUpdateType.NONE);
 223
 224                 if (pcp.isOffset()) {
 225                         // Adjusting the rotation angle of an offset component may change variable angle turns
 226                         PipeControlPoint end = pcp.findNextEnd();
 227                         if (end.isVariableAngle()) {
 228                                 updatePathLegNext(end, end, PathLegUpdateType.NONE);
 229                         }
 230                         if (start.isVariableAngle()) {
 231                                 updatePathLegPrev(start, start, PathLegUpdateType.NONE);
 232                         }
 233                 }
 234         }
 235
 236         private static PipeControlPoint insertElbow(PipeControlPoint pcp1, PipeControlPoint pcp2, Vector3d pos) throws Exception{
 237                 if (LOGGER.isTraceEnabled())
 238                         LOGGER.trace("PipingRules.insertElbow() " + pcp1 + " " + pcp2 + " " + pos);
 239                 if (pcp1.getNext() == pcp2 && pcp2.getPrevious() == pcp1) {
 240
 241                 } else if (pcp1.getNext() == pcp2 && pcp1.isDualInline() && pcp2.getPrevious() == pcp1.getDualSub()) {
 242                         pcp1 = pcp1.getDualSub();
 243                 } else if (pcp1.getPrevious() == pcp2 && pcp2.getNext() == pcp1) {
 244                         PipeControlPoint t = pcp1;
 245                         pcp1 = pcp2;
 246                         pcp2 = t;
 247                 } else if (pcp2.isDualInline() && pcp1.getPrevious() == pcp2.getDualSub() && pcp2.getNext() == pcp1) {
 248                         PipeControlPoint t = pcp1;
 249                         pcp1 = pcp2.getDualSub();
 250                         pcp2 = t;
 251                 } else {
 252                         throw new RuntimeException();
 253                 }
 254                 TurnComponent elbow = ComponentUtils.createTurn((P3DRootNode)pcp1.getRootNode());
 255                 PipeControlPoint pcp = elbow.getControlPoint();
 256                 if (pcp1.isDualInline())
 257                         pcp1 = pcp1.getDualSub();
 258                 String name = pcp1.getPipeRun().getUniqueName("Elbow");
 259                 elbow.setName(name);
 260                 pcp1.getPipeRun().addChild(elbow);
 261
 262                 pcp.insert(pcp1, pcp2);
 263
 264                 pcp.setWorldPosition(pos);
 265                 validate(pcp.getPipeRun());
 266                 return pcp;
 267         }
 268
 269         private static PipeControlPoint insertStraight(PipeControlPoint pcp1, PipeControlPoint pcp2, Vector3d pos, double length) throws Exception {
 270                 if (LOGGER.isTraceEnabled())
 271                         LOGGER.trace("PipingRules.insertStraight() " + pcp1 + " " + pcp2 + " " + pos);
 272                 if (pcp1.getNext() == pcp2 && pcp2.getPrevious() == pcp1) {
 273
 274                 } else if (pcp1.getNext() == pcp2 && pcp1.isDualInline() && pcp2.getPrevious() == pcp1.getDualSub()) {
 275                         pcp1 = pcp1.getDualSub();
 276                 } else if (pcp1.getPrevious() == pcp2 && pcp2.getNext() == pcp1) {
 277                         PipeControlPoint t = pcp1;
 278                         pcp1 = pcp2;
 279                         pcp2 = t;
 280                 } else if (pcp2.isDualInline() && pcp1.getPrevious() == pcp2.getDualSub() && pcp2.getNext() == pcp1) {
 281                         PipeControlPoint t = pcp1;
 282                         pcp1 = pcp2.getDualSub();
 283                         pcp2 = t;
 284                 } else {
 285                         throw new RuntimeException();
 286                 }
 287                 InlineComponent component = ComponentUtils.createStraight((P3DRootNode)pcp1.getRootNode());
 288                 PipeControlPoint scp = component.getControlPoint();
 289                 if (pcp1.isDualInline())
 290                         pcp1 = pcp1.getDualSub();
 291                 String name = pcp1.getPipeRun().getUniqueName("Pipe");
 292                 component.setName(name);
 293                 pcp1.getPipeRun().addChild(component);
 294
 295                 scp.insert(pcp1, pcp2);
 296
 297                 scp.setWorldPosition(pos);
 298                 Vector3d dir = new Vector3d();
 299                 dir.sub(pcp2.getWorldPosition(), pcp1.getWorldPosition());
 300                 scp.orientToDirection(dir);
 301                 scp.setLength(length);
 302                 validate(scp.getPipeRun());
 303                 return scp;
 304         }
 305
 306         private static PipeControlPoint insertStraight(PipeControlPoint pcp, Direction direction , Vector3d pos, double length) throws Exception {
 307                 if (LOGGER.isTraceEnabled())
 308                         LOGGER.trace("PipingRules.insertStraight() " + pcp + " " + direction + " " + pos);
 309
 310                 InlineComponent component = ComponentUtils.createStraight((P3DRootNode)pcp.getRootNode());
 311                 PipeControlPoint scp = component.getControlPoint();
 312                 if (pcp.isDualInline() && direction == Direction.NEXT)
 313                         pcp = pcp.getDualSub();
 314                 String name = pcp.getPipeRun().getUniqueName("Pipe");
 315                 component.setName(name);
 316                 pcp.getPipeRun().addChild(component);
 317
 318                 scp.insert(pcp,direction);
 319
 320                 scp.setWorldPosition(pos);
 321                 scp.setLength(length);
 322                 validate(scp.getPipeRun());
 323                 return scp;
 324         }
 325
 326         private static void updatePathLegNext(PipeControlPoint start, PipeControlPoint updated, PathLegUpdateType lengthChange) throws Exception {
 327                 UpdateStruct2 us = createUS(start, Direction.NEXT, 0, new ArrayList<ExpandIterInfo>(), updated);
 328                 if (us == null) {
 329                     LOGGER.trace("Null update struct " + start);
 330                     return;
 331                 }
 332                 updatePathLeg(us, lengthChange);
 333         }
 334
 335         private static void updatePathLegPrev(PipeControlPoint start, PipeControlPoint updated, PathLegUpdateType lengthChange) throws Exception {
 336                 UpdateStruct2 us = createUS(start, Direction.PREVIOUS, 0, new ArrayList<ExpandIterInfo>(), updated);
 337                 if (us == null) {
 338             LOGGER.trace("Null update struct " + start);
 339             return;
 340         }
 341                 updatePathLeg(us, lengthChange);
 342         }
 343
 344         private static class UpdateStruct2 {
 345                 public PipeControlPoint start;
 346                 public Vector3d startPoint;
 347                 public ArrayList<PipeControlPoint> list;
 348                 public PipeControlPoint end;
 349                 public Vector3d endPoint;
 350                 public Vector3d dir;
 351                 public Vector3d offset;
 352                 public boolean hasOffsets;
 353                 public int iter;
 354                 public boolean reversed;
 355                 public ArrayList<ExpandIterInfo> toRemove;
 356                 public PipeControlPoint updated;
 357
 358                 public UpdateStruct2(PipeControlPoint start, Vector3d startPoint, ArrayList<PipeControlPoint> list, PipeControlPoint end, Vector3d endPoint, Vector3d dir, Vector3d offset, boolean hasOffsets, int iter, boolean reversed, ArrayList<ExpandIterInfo> toRemove, PipeControlPoint updated) {
 359                         if (start == null || end == null)
 360                                 throw new NullPointerException();
 361                         this.start = start;
 362                         this.startPoint = startPoint;
 363                         this.list = list;
 364                         this.end = end;
 365                         this.endPoint = endPoint;
 366                         this.dir = dir;
 367                         this.offset = offset;
 368                         this.hasOffsets = hasOffsets;
 369                         this.iter = iter;
 370                         this.reversed = reversed;
 371                         this.toRemove = toRemove;
 372                         this.updated = updated;
 373
 374                         if (!MathTools.isValid(startPoint) ||
 375                                 !MathTools.isValid(endPoint) ||
 376                                 !MathTools.isValid(dir)) {
 377                                 throw new RuntimeException();
 378                         }
 379                 }
 380
 381                 public String toString() {
 382                         return start + " " + end+ " " + dir + " " + hasOffsets + " " + offset + " " + iter + " " + toRemove.size();
 383                 }
 384
 385         }
 386
 387         /**
 388          * Calculate offset based on a given fixed component direction.
 389          *
 390          * The desired component direction is provided as an input to this method,
 391          * unlike the direction vector that is calculated by calculateOffset.
 392          *
 393          * The returned offset vector is always perpendicular to the given direction
 394          * vector.
 395          *
 396          * @param startPoint Start point of leg
 397          * @param endPoint   End point of leg
 398          * @param start      Starting component of leg
 399          * @param list       Inline components between start and end
 400          * @param end        Ending component of leg
 401          * @param dir        Direction at which the offset is calculated
 402          * @param offset     A vector object to receive the offset vector values
 403          * @return True if offsets are present
 404          */
 405         public static boolean calculateDirectedOffset(Vector3d startPoint, Vector3d endPoint, PipeControlPoint start, ArrayList<PipeControlPoint> list, PipeControlPoint end, Vector3d dir, Vector3d offset) {
 406                 return calculateOffset(startPoint, endPoint, start, list, end, dir, offset, true);
 407         }
 408
 409         /**
 410          * Calculate offset and direction vectors for a path leg so that the given chain
 411          * of components starts and ends at the given coordinates
 412          *
 413          * The returned direction and offset vectors are perpendicular to each other.
 414          *
 415          * @param startPoint Start point of the leg
 416          * @param endPoint   End point of the leg
 417          * @param start      Starting component of the leg
 418          * @param list       Inline components between start and end
 419          * @param end        Ending component of the leg
 420          * @param dir        A vector object to receive the component direction vector
 421          * @param offset     A vector object to receive the offset vector
 422          * @return True if offsets are present
 423          */
 424         public static boolean calculateOffset(Vector3d startPoint, Vector3d endPoint, PipeControlPoint start, ArrayList<PipeControlPoint> list, PipeControlPoint end, Vector3d dir, Vector3d offset) {
 425                 return calculateOffset(startPoint, endPoint, start, list, end, dir, offset, false);
 426         }
 427
 428         private static boolean calculateOffset(Vector3d startPoint, Vector3d endPoint, PipeControlPoint start, ArrayList<PipeControlPoint> list, PipeControlPoint end, Vector3d dir, Vector3d offset, boolean directed) {
 429                 List<PipeControlPoint> offsets = getOffsetPoints(start, list);
 430                 if (offsets.size() == 0) {
 431                         setZeroOffset(startPoint, endPoint, dir, offset);
 432                         return false;
 433                 } else {
 434                         Vector3d sp = new Vector3d(startPoint);
 435                         Point3d ep = new Point3d(endPoint);
 436                         if (!directed) {
 437                                 dir.set(ep);
 438                                 dir.sub(sp);
 439                         }
 440
 441                         double l = dir.lengthSquared();
 442                         if (l > MathTools.NEAR_ZERO)
 443                                 dir.scale(1.0/Math.sqrt(l));
 444
 445                         int iter = 100;
 446                         while (true) {
 447                                 iter--;
 448                                 offset.set(0.0, 0.0, 0.0);
 449
 450                                 for (PipeControlPoint icp : offsets) {
 451                                         Vector3d v = icp.getSizeChangeOffsetVector(dir);
 452                                         offset.add(v);
 453                                 }
 454
 455                                 if (directed)
 456                                         break;
 457
 458                                 Point3d nep = new Point3d(endPoint);
 459                                 nep.sub(offset);
 460                                 if (nep.distance(ep) < 0.0000000001 || iter <= 0) {
 461                                         break;
 462                                 }
 463
 464                                 ep = nep;
 465                                 dir.set(ep);
 466                                 dir.sub(sp);
 467                                 l = dir.lengthSquared();
 468                                 if (l > MathTools.NEAR_ZERO)
 469                                         dir.scale(1.0/Math.sqrt(l));
 470                         }
 471
 472                         if (LOGGER.isTraceEnabled())
 473                                 LOGGER.trace("calcOffset s:"+ startPoint + " e:" + endPoint + " d:" + dir + " o:"+offset) ;
 474
 475                         return true;
 476                 }
 477         }
 478
 479         public static void setZeroOffset(Vector3d startPoint, Vector3d endPoint, Vector3d dir, Vector3d offset) {
 480                 dir.set(endPoint);
 481                 dir.sub(startPoint);
 482                 double l = dir.lengthSquared();
 483                 if (l > MathTools.NEAR_ZERO)
 484                         dir.scale(1.0/Math.sqrt(l));
 485                 offset.set(0.0, 0.0, 0.0);
 486         }
 487
 488         public static List<PipeControlPoint> getOffsetPoints(PipeControlPoint start, ArrayList<PipeControlPoint> list) {
 489                 List<PipeControlPoint> offsets = new ArrayList<PipeControlPoint>(list.size());
 490                 // Only start offset affects the calculation
 491                 if (start.isOffset())
 492                     offsets.add(start);
 493                 for (PipeControlPoint icp : list) {
 494                         if (icp.isOffset()) {
 495                                 offsets.add(icp);
 496                         } else if (icp.isDualSub())
 497                                 ErrorLogger.defaultLogError("Updating pipe run, found offset controlpoint " + icp, new Exception("ASSERT!"));
 498                 }
 499                 return offsets;
 500         }
 501
 502         private static UpdateStruct2 createUS(PipeControlPoint start, Direction direction, int iter, ArrayList<ExpandIterInfo> toRemove, PipeControlPoint updated) {
 503                 ArrayList<PipeControlPoint> list = new ArrayList<PipeControlPoint>();
 504                 PipeControlPoint end = null;
 505                 if (direction == Direction.NEXT) {
 506                         end = start.findNextEnd(list);
 507                 } else {
 508                         ArrayList<PipeControlPoint> prevList = new ArrayList<PipeControlPoint>();
 509                         PipeControlPoint tend = start.findPreviousEnd(prevList);
 510                         for (PipeControlPoint icp : prevList) {
 511                                 if (icp.isDualSub()) {
 512                                         list.add(0, icp.getParentPoint());
 513                                 } else {
 514                                         list.add(0, icp);
 515                                 }
 516                         }
 517                         end = start;
 518                         start = tend;
 519                 }
 520                 if (start == end)
 521                         return null;
 522                 boolean hasOffsets = false;
 523                 Vector3d offset = new Vector3d();
 524                 Vector3d startPoint = start.getWorldPosition();
 525                 Vector3d endPoint = end.getWorldPosition();
 526                 Vector3d dir = new Vector3d();
 527                 hasOffsets = calculateOffset(startPoint, endPoint, start, list, end, dir, offset);
 528                 return new UpdateStruct2(start, startPoint, list, end, endPoint, dir, offset, hasOffsets, iter, direction == Direction.PREVIOUS, toRemove, updated);
 529         }
 530
 531         private static Vector3d pathLegDirection(PipeControlPoint start) {
 532                 ArrayList<PipeControlPoint> list = new ArrayList<PipeControlPoint>();
 533                 PipeControlPoint end = start.findNextEnd(list);
 534                 if (start == end) {
 535                         return start.getDirection(Direction.NEXT);
 536                 }
 537
 538                 Vector3d offset = new Vector3d();
 539                 Vector3d startPoint = start.getWorldPosition();
 540                 Vector3d endPoint = end.getWorldPosition();
 541                 Vector3d dir = new Vector3d();
 542                 calculateOffset(startPoint, endPoint, start, list, end, dir, offset);
 543                 return dir;
 544         }
 545
 546         private static boolean asDirected(PipeControlPoint pcp, Direction direction) {
 547                 if (pcp.isDirected())
 548                         return true;
 549                 if (pcp.asFixedAngle()) {
 550                         if (!pcp._getReversed())
 551                                 return direction == Direction.NEXT;
 552                         else
 553                                 return direction == Direction.PREVIOUS;
 554                 }
 555                 return false;
 556         }
 557
 558         private static Vector3d direction(PipeControlPoint pcp, Direction direction) {
 559                 return pcp.getDirection(direction);
 560         }
 561
 562         private static void updatePathLeg(UpdateStruct2 u, PathLegUpdateType lengthChange) throws Exception {
 563             boolean rs = true;
 564             boolean re = true;
 565             if (lengthChange == PathLegUpdateType.NONE) {
 566                 rs = false;
 567                 re = false;
 568             }
 569             updatePathLeg(u, lengthChange, rs, re);
 570         }
 571
 572         private static void updatePathLeg(UpdateStruct2 u, PathLegUpdateType lengthChange, boolean rs, boolean re) throws Exception {
 573                 int directed = 0;
 574                 if (asDirected(u.start, Direction.NEXT))
 575                         directed++;
 576                 if (asDirected(u.end, Direction.PREVIOUS))
 577                         directed++;
 578                 if (rs)
 579                     setErrorForce(u.start, null);
 580                 if (re)
 581                     setErrorForce(u.end, null);
 582         for (PipeControlPoint pcp : u.list)
 583             setErrorForce(pcp, null);
 584                 switch (directed) {
 585                 case 0:
 586                         updateFreePathLeg(u, lengthChange);
 587                         break;
 588                 case 1:
 589                         updateDirectedPathLeg(u, lengthChange);
 590                         break;
 591                 case 2:
 592                         updateDualDirectedPathLeg(u, lengthChange);
 593                         break;
 594                 }
 595
 596         }
 597
 598         private static void updateFreePathLeg(UpdateStruct2 u, PathLegUpdateType lengthChange) throws Exception {
 599                 if (LOGGER.isTraceEnabled())
 600                         LOGGER.trace("PipingRules.updateFreePipeRun " + u + " " + lengthChange);
 601                 checkExpandPathLeg(u, lengthChange);
 602                 if (u.start.isInline() || u.end.isInline() || u.start.asFixedAngle()|| u.end.asFixedAngle())
 603                         processPathLeg(u, true, false);
 604         }
 605
 606         private static void updateInlineControlPoints(UpdateStruct2 u, boolean checkSizes) throws Exception{
 607                 if (LOGGER.isTraceEnabled())
 608                         LOGGER.trace("PipingRules.updateInlineControlPoints() " + u);
 609
 610                 Vector3d start = new Vector3d(u.startPoint);
 611                 Vector3d end = new Vector3d(u.endPoint);
 612
 613                 if (checkSizes) {
 614                         // create offsets for leg ends.
 615                     if (u.start.isTurn())
 616                         MathTools.mad(start, u.dir, u.start.getInlineLength());
 617                     if (u.end.isTurn())
 618                         MathTools.mad(end, u.dir, -u.end.getInlineLength());
 619                 }
 620
 621                 boolean recalcline = false;
 622
 623                 Vector3d sp = new Vector3d(start);
 624                 Vector3d ep = new Vector3d(end);
 625                 ep.sub(u.offset);
 626
 627                 if (u.start.isOffset()) {
 628                     Vector3d offset = u.start.getSizeChangeOffsetVector(u.dir);
 629                     updateOffsetPoint(u.start, offset);
 630             sp.add(offset);
 631             ep.add(offset);
 632                 }
 633
 634                 for (PipeControlPoint icp : u.list) {
 635                         updateInlineControlPoint(icp, sp, ep, u.dir);
 636                         if (icp.isOffset()) {
 637                                 // TODO : offset vector is already calculated and should be cached
 638                                 Vector3d  offset = icp.getSizeChangeOffsetVector(u.dir);
 639                                 updateOffsetPoint(icp, offset);
 640                                 sp.add(offset);
 641                                 ep.add(offset);
 642                         }
 643                 }
 644
 645                 if (!checkSizes)
 646                         return;
 647
 648                 // Collect all path leg points for updating variable length components. This list will also contain leg ends (usually turns)
 649         ArrayList<PipeControlPoint> pathLegPoints = new ArrayList<>();
 650         // Collect all fixed length components with their offsets.
 651         ArrayList<Pair<PipeControlPoint,Vector3d>> fixedLengthPoints = new ArrayList<>();
 652
 653         pathLegPoints.add(u.start);
 654         fixedLengthPoints.add(new Pair<PipeControlPoint, Vector3d>(u.start, new Vector3d()));
 655         Vector3d off = new Vector3d();
 656         for (PipeControlPoint icp : u.list) {
 657             pathLegPoints.add(icp);
 658             updateBranchControlPointBranches(icp);
 659             if (icp.isOffset()) {
 660                 fixedLengthPoints.add(new Pair<PipeControlPoint, Vector3d>(icp, new Vector3d(off)));
 661                 Vector3d  offset = icp.getSizeChangeOffsetVector(u.dir);
 662                 off.add(offset);
 663             } else if (!icp.isVariableLength()) {
 664                 fixedLengthPoints.add(new Pair<PipeControlPoint, Vector3d>(icp, new Vector3d(off)));
 665             }
 666         }
 667         pathLegPoints.add(u.end);
 668         fixedLengthPoints.add(new Pair<PipeControlPoint, Vector3d>(u.end, new Vector3d(off)));
 669
 670                 sp = new Vector3d(start);
 671                 ep = new Vector3d(end);
 672                 ep.sub(u.offset);
 673
 674                 updateFixedLengths(fixedLengthPoints, sp, ep, u.dir);
 675
 676                 for (int i = 0; i < pathLegPoints.size(); i++) {
 677                         PipeControlPoint icp = pathLegPoints.get(i);
 678
 679                         PipeControlPoint prev = i > 0 ? pathLegPoints.get(i - 1) : null;
 680                         PipeControlPoint next = i < pathLegPoints.size() - 1 ? pathLegPoints.get(i + 1) : null;
 681
 682                         if (prev != null && prev.isDualInline())
 683                                 prev = prev.getDualSub();
 684
 685                         if (icp.isVariableLength()) {
 686                                 if (prev != null && next != null) {
 687                                         recalcline = recalcline | updateVariableLength(icp,  prev, next);
 688
 689                                 } else {
 690                                     // this is variable length component at the end of the piperun.
 691                     // the problem is that we want to keep unconnected end of the component in the same
 692                     // place, but center of the component must be moved.
 693                                         updateVariableLengthEnd(icp, prev != null ? prev : next);
 694                                 }
 695                         } else if (prev != null && !prev.isVariableLength()) {
 696                             // If this and previous control point are not variable length pcps,
 697                 // we'll have to check if there is no empty space between them.
 698                 // I there is, we'll have to create new variable length component between them.
 699                                 recalcline = recalcline | possibleVaribleLengthInsert(icp, prev);
 700                         }
 701                         if (icp.isOffset()) {
 702                                 // TODO : offset vector is already calculated and should be cached
 703                                 Vector3d  offset = icp.getSizeChangeOffsetVector(u.dir);
 704                                 sp.add(offset);
 705                                 ep.add(offset);
 706                         }
 707                 }
 708
 709                 if (recalcline) {
 710                         u.list.clear();
 711                         u.start.findNextEnd(u.list);
 712                 }
 713                 if (checkSizes) {
 714                     sp = new Vector3d(u.startPoint);
 715                 ep = new Vector3d(u.endPoint);
 716                 ep.sub(u.offset);
 717                     double pathLegLength = MathTools.distance(sp, ep);
 718             double availableLength = pathLegLength;
 719             if (u.start.isTurn())
 720                 availableLength -= u.start.getInlineLength();
 721             if (u.end.isTurn())
 722                 availableLength -= u.end.getInlineLength();
 723             for (PipeControlPoint pcp : u.list) {
 724                 if (!pcp.isVariableLength())
 725                     availableLength-= pcp.getLength();
 726                     }
 727             if (availableLength < 0.0) {
 728                 setError(u.start, "Not enough available space");
 729                 setError(u.end, "Not enough available space");
 730                 for (PipeControlPoint pcp : u.list)
 731                     setError(pcp, "Not enough available space");
 732             }
 733 //            LOGGER.trace(u.start.getPipelineComponent().toString() + " " + pathLegLength + " " + availableLength + " " + u.end.getPipelineComponent().toString() + " " + u.start.getInlineLength() + " " + u.end.getInlineLength());
 734                 }
 735         }
 736
 737         private enum Gap{ATTACHED,OVERLAP,SPACE};
 738
 739         private static class GapObj {
 740             Gap gap;
 741             double d;
 742
 743             Pair<PipeControlPoint,Vector3d> pcp1;
 744             Pair<PipeControlPoint,Vector3d> pcp2;
 745         }
 746
 747         private static void updateFixedLengths(List<Pair<PipeControlPoint,Vector3d>> fixedLengthPoints, Vector3d s, Vector3d e, Vector3d dir) {
 748             double totalLength = MathTools.distance(s, e);
 749             double reservedLength = 0.0;
 750             List<Double> distances = new ArrayList<>(fixedLengthPoints.size());
 751             distances.add(0.0);
 752             for (int i = 1; i < fixedLengthPoints.size()-1; i++) {
 753                 Pair<PipeControlPoint,Vector3d> pcp = fixedLengthPoints.get(i);
 754                 reservedLength += pcp.first.getLength();
 755                 Vector3d p = pcp.first.getWorldPosition();
 756                 p.sub(pcp.second);
 757                 double d= MathTools.distance(s, p);
 758                 distances.add(d);
 759             }
 760             distances.add(totalLength);
 761
 762             if (totalLength >= reservedLength) {
 763                 // There is enough space for all fixed length components.
 764                 List<GapObj> gaps = new ArrayList<>(fixedLengthPoints.size()-1);
 765                 int overlaps = 0;
 766                 // Analyze gaps between components
 767                 for (int i = 0; i < fixedLengthPoints.size()-1; i++) {
 768                     Pair<PipeControlPoint,Vector3d> pcp1 = fixedLengthPoints.get(i);
 769                     Pair<PipeControlPoint,Vector3d> pcp2 = fixedLengthPoints.get(i+1);
 770                     double d1 = distances.get(i);
 771                     double d2 = distances.get(i+1);
 772                     double ld1 = i == 0 ? 0.0 :pcp1.first.getInlineLength();
 773                     double ld2 = i == fixedLengthPoints.size()-2 ? 0.0 : pcp2.first.getInlineLength();
 774
 775                     double e1 = d1 + ld1; // End of comp1
 776                     double s2 = d2 - ld2; // Start of comp2
 777                     double diff =s2 - e1;
 778                     GapObj obj = new GapObj();
 779                     obj.pcp1 = pcp1;
 780                     obj.pcp2 = pcp2;
 781                     obj.d = diff;
 782                     if (diff < -MIN_INLINE_LENGTH) {
 783                         obj.gap = Gap.OVERLAP;
 784                         overlaps++;
 785                     } else if (diff > MIN_INLINE_LENGTH) {
 786                         obj.gap = Gap.SPACE;
 787                     } else {
 788                         obj.gap = Gap.ATTACHED;
 789                     }
 790                     gaps.add(obj);
 791                 }
 792                 // If there are no overlaps, there is nothing to do.
 793                 if (overlaps == 0)
 794                     return;
 795                 // Get rid of overlapping components by using closest available free spaces.
 796                 for (int i = 0; i < gaps.size(); i++) {
 797                     GapObj gapObj = gaps.get(i);
 798                     if (gapObj.gap != Gap.OVERLAP)
 799                         continue;
 800                     double curr = gapObj.d;
 801                     int d = 1;
 802                     while (d < gaps.size() && curr < -MIN_INLINE_LENGTH) {
 803                         GapObj next = i+d < gaps.size() ? gaps.get(i+d) : null;
 804                     GapObj prev = i-d >= 0 ? gaps.get(i-d) : null;
 805                         if (next != null && next.gap == Gap.SPACE) {
 806                             double move = Math.min(-curr, next.d);
 807                             curr+= move;
 808                             next.d -= move;
 809                             if (next.d < MIN_INLINE_LENGTH)
 810                                 next.gap = Gap.ATTACHED;
 811                             Vector3d mv = new Vector3d(dir);
 812                             mv.normalize();
 813                             mv.scale(move);
 814                             for (int j = i ; j < i+d; j++) {
 815                                 Pair<PipeControlPoint,Vector3d> pcp = gaps.get(j).pcp2;
 816                                 Vector3d p = new Vector3d(pcp.first.getWorldPosition());
 817                                 p.add(mv);
 818                                 pcp.first.setWorldPosition(p);
 819                             }
 820                         }
 821                         else if (prev != null && prev.gap == Gap.SPACE) {
 822                             double move = Math.min(-curr, prev.d);
 823                         curr+= move;
 824                         prev.d -= move;
 825                         if (prev.d < MIN_INLINE_LENGTH)
 826                             prev.gap = Gap.ATTACHED;
 827                         Vector3d mv = new Vector3d(dir);
 828                         mv.normalize();
 829                         mv.scale(-move);
 830                         for (int j = i ; j > i-d; j--) {
 831                             Pair<PipeControlPoint,Vector3d> pcp = gaps.get(j).pcp1;
 832                             Vector3d p = new Vector3d(pcp.first.getWorldPosition());
 833                             p.add(mv);
 834                             pcp.first.setWorldPosition(p);
 835                         }
 836                         }
 837                         else {
 838                             d++;
 839                         }
 840                     }
 841                 }
 842             } else {
 843             for (int i = 1; i < fixedLengthPoints.size()-1; i++) {
 844                 Pair<PipeControlPoint,Vector3d> prev = i == 0 ? null : fixedLengthPoints.get(i-1);
 845                 Pair<PipeControlPoint,Vector3d> curr = fixedLengthPoints.get(i);
 846                 Pair<PipeControlPoint,Vector3d> next = i == fixedLengthPoints.size() -1 ? null : fixedLengthPoints.get(i+1);
 847                 updateFixedLength(curr, prev, next, s,e, dir);
 848             }
 849             }
 850         }
 851
 852         private static void updateFixedLength(Pair<PipeControlPoint,Vector3d> icp, Pair<PipeControlPoint,Vector3d> prev,  Pair<PipeControlPoint,Vector3d> next, Vector3d s, Vector3d e, Vector3d dir) {
 853             if (prev != null) {
 854                checkOverlap(prev, icp, dir,true);
 855             }
 856             if (next != null)
 857                 checkOverlap(icp, next, dir,true);
 858         }
 859
 860         private static boolean checkOverlap(Pair<PipeControlPoint,Vector3d> icp, Pair<PipeControlPoint,Vector3d> icp2, Vector3d dir, boolean se) {
 861             Vector3d p1 = icp.first.getWorldPosition();
 862             Vector3d p2 = icp2.first.getWorldPosition();
 863             p1.add(icp.second);
 864             p2.add(icp2.second);
 865             double u[] = new double[1];
 866             MathTools.closestPointOnStraight(p2, p1, dir, u);
 867             if (u[0] < 0.0) {
 868                 p2.set(p1);
 869                 p2.sub(icp.second);
 870                 p2.add(icp2.second);
 871                 MathTools.mad(p2, dir, MIN_INLINE_LENGTH);
 872                 icp2.first.setWorldPosition(p2);
 873             }
 874             double d = MathTools.distance(p1, p2);
 875         double r = icp.first.getInlineLength() + icp2.first.getInlineLength();
 876
 877             if ((d-r) < - MIN_INLINE_LENGTH) {
 878             if (se) {
 879                 setError(icp.first, "Overlapping");
 880                 setError(icp2.first, "Overlapping");
 881             }
 882             return true;
 883         }
 884         return false;
 885         }
 886
 887         /**
 888          * Overrides current error of a component
 889          * @param pcp
 890          * @param error
 891          */
 892         private static void setErrorForce(PipeControlPoint pcp, String error) {
 893             PipelineComponent comp = pcp.getPipelineComponent();
 894         if (comp == null)
 895             return;
 896         comp.setError(error);
 897         }
 898
 899         /**
 900          * Sets error for a component, if there is no existing error.
 901          * @param pcp
 902          * @param error
 903          */
 904         private static void setError(PipeControlPoint pcp, String error) {
 905             PipelineComponent comp = pcp.getPipelineComponent();
 906             if (comp == null)
 907                 return;
 908             if (comp.getError() != null)
 909                 return;
 910             comp.setError(error);
 911         }
 912
 913         private static boolean updateVariableLength(PipeControlPoint icp, PipeControlPoint prev,  PipeControlPoint next) {
 914                 Vector3d prevPos = prev.getWorldPosition();
 915                 Vector3d nextPos = next.getWorldPosition();
 916
 917                 Vector3d dir = new Vector3d(nextPos);
 918                 dir.sub(prevPos);
 919                 double l = dir.length();                // distance between control points
 920                 double l2prev = prev.getInlineLength(); // distance taken by components
 921                 double l2next = next.getInlineLength();
 922                 double l2 = l2prev + l2next;
 923                 double length = l - l2;                 // true length of the variable length component
 924                 if (length >= MIN_INLINE_LENGTH) {      // check if there is enough space for variable length component.
 925                         // components fit
 926                         dir.normalize();
 927                         dir.scale(length * 0.5 + l2prev);   // calculate center position of the component
 928                         dir.add(prevPos);
 929                         icp.setWorldPosition(dir);
 930                         icp.setLength(length);
 931                         return false;
 932                 } else {
 933                         // components leave no space to the component and it must be removed
 934                         if (icp.isDeletable()) {
 935                             if (!allowInsertRemove) {
 936                                 icp.setLength(MIN_INLINE_LENGTH);
 937                                 setError(icp, "Not enough available space");
 938                                 triedIR = true;
 939                                 return false;
 940                             }
 941                                 if (LOGGER.isTraceEnabled())
 942                                         LOGGER.trace("PipingRules.updateVariableLength removing " + icp);
 943                                 icp._remove();
 944                                 return true;
 945                         } else {
 946                             icp.setLength(MIN_INLINE_LENGTH);
 947                             icp.getPipelineComponent().setError("Not enough available space");
 948                         }
 949                         return false;
 950                 }
 951         }
 952
 953         private static boolean possibleVaribleLengthInsert(PipeControlPoint icp, PipeControlPoint prev) throws Exception{
 954                 Vector3d currentPos = icp.getWorldPosition();
 955                 Vector3d prevPos = prev.getWorldPosition();
 956                 Vector3d dir = new Vector3d(currentPos);
 957                 dir.sub(prevPos);
 958                 double l = dir.lengthSquared();
 959                 double l2prev = prev.getInlineLength();
 960                 double l2next = icp.getInlineLength();
 961                 double l2 = l2prev + l2next;
 962                 double l2s = l2 * l2;
 963                 double diff = l - l2s;
 964                 if (diff >= MIN_INLINE_LENGTH) {
 965                         if (allowInsertRemove) {
 966                                 dir.normalize();
 967                                 double length = Math.sqrt(l) - l2; // true length of the variable length component
 968                                 dir.scale(length * 0.5 + l2prev); // calculate center position of the component
 969                                 dir.add(prevPos);
 970                                 insertStraight(prev, icp, dir, length);
 971                                 return true;
 972                         } else {
 973                                 triedIR = true;
 974                         }
 975                 }
 976                 return false;
 977         }
 978
 979         private static void updateVariableLengthEnd(PipeControlPoint icp,  PipeControlPoint prev) {
 980                 Vector3d currentPos = icp.getWorldPosition();
 981                 Vector3d prevPos = prev.getWorldPosition();
 982
 983                 Vector3d dir = new Vector3d();
 984                 dir.sub(currentPos, prevPos);
 985
 986                 boolean simple;
 987                 synchronized (ruleMutex) {
 988                         simple = currentUpdates.contains(icp);
 989                 }
 990
 991                 if (simple) {
 992                         // Update based on position -> adjust length
 993                         double currentLength = (dir.length() - prev.getInlineLength()) * 2.0;
 994                         icp.setLength(currentLength);
 995                 } else {
 996                         // Update based on neighbour movement -> adjust length and position, so that free end stays in place.
 997                         double currentLength = icp.getLength();
 998                         if (currentLength < MathTools.NEAR_ZERO) {
 999                                 currentLength = (dir.length() - prev.getInlineLength()) * 2.0;
1000                         }
1001
1002                         if (dir.lengthSquared() > MathTools.NEAR_ZERO)
1003                                 dir.normalize();
1004                         Point3d endPos = new Point3d(dir);
1005                         endPos.scale(currentLength * 0.5);
1006                         endPos.add(currentPos); // this is the free end of the component
1007
1008                         double offset = prev.getInlineLength();
1009                         Point3d beginPos = new Point3d(dir);
1010                         beginPos.scale(offset);
1011                         beginPos.add(prevPos); // this is the connected end of the component
1012
1013                         double l = beginPos.distance(endPos);
1014
1015                         if (Double.isNaN(l))
1016                                 LOGGER.debug("Length for " + icp + " is NaN");
1017
1018                         dir.scale(l * 0.5);
1019                         beginPos.add(dir); // center position
1020
1021                         if (LOGGER.isTraceEnabled())
1022                                 LOGGER.trace("PipingRules.updateInlineControlPoints() setting variable length to " + l);
1023                         icp.setLength(l);
1024
1025                         icp.setWorldPosition(new Vector3d(beginPos));
1026                 }
1027         }
1028
1029         /**
1030          * Recalculates offset vector based on current direction, and calls checkExpandPathLeg
1031          * @param u
1032          * @param updateEnds
1033          * @throws Exception
1034          */
1035         private static void ppNoOffset(UpdateStruct2 u, boolean updateEnds) throws Exception {
1036                 if (LOGGER.isTraceEnabled())
1037                         LOGGER.trace("PipingRules.ppNoOffset() " + u);
1038                 Vector3d offset = new Vector3d();
1039                 if (u.hasOffsets) {
1040                         for (PipeControlPoint icp : u.list) {
1041                                 if (icp.isOffset()) {
1042                                         offset.add(icp.getSizeChangeOffsetVector(u.dir));
1043                                 } else if (icp.isDualSub())
1044                                         ErrorLogger.defaultLogError("Updating pipe run, found offset controlpoint " + icp, new Exception("ASSERT!"));
1045                         }
1046                 }
1047                 u.offset = offset;
1048                 checkExpandPathLeg(u, PathLegUpdateType.NONE, updateEnds);
1049         }
1050
1051         private static void ppNoDir(PipeControlPoint start, Vector3d startPoint, ArrayList<PipeControlPoint> list, PipeControlPoint end, Vector3d endPoint, boolean hasOffsets, int iter, boolean reversed, ArrayList<ExpandIterInfo> toRemove, PipeControlPoint updated) throws Exception {
1052                 if (LOGGER.isTraceEnabled())
1053                         LOGGER.trace("PipingRules.ppNoDir() " + start + " " + end + " " + iter + " " + toRemove.size());
1054                 // FIXME : extra loop (dir should be calculated here)
1055                 Vector3d dir = new Vector3d();
1056                 Vector3d offset = new Vector3d();
1057                 hasOffsets = calculateOffset(startPoint, endPoint, start, list, end, dir, offset);
1058                 ppNoOffset(new UpdateStruct2(start, startPoint, list, end, endPoint, dir, null, hasOffsets, iter, reversed, toRemove, updated),true);
1059         }
1060
1061         private static void checkExpandPathLeg(UpdateStruct2 u, PathLegUpdateType lengthChange) throws Exception {
1062                 checkExpandPathLeg(u, lengthChange, u.updated.isInline() && u.updated.isOffset());
1063         }
1064
1065         private static void checkExpandPathLeg(UpdateStruct2 u, PathLegUpdateType lengthChange, boolean updateEnds) throws Exception {
1066                 if (LOGGER.isTraceEnabled())
1067                         LOGGER.trace("PipingRules.checkExpandPathLeg() " + u + " " + lengthChange);
1068                 if (lengthChange != PathLegUpdateType.NONE) {
1069                         // FIXME : turns cannot be checked before inline cps are updated,
1070                         // since their position affects calculation of turns
1071                         processPathLeg(u, updateEnds, false);
1072                         int type = checkTurns(u, lengthChange);
1073                         if (type == REMOVE_NONE) {
1074                                 processPathLeg(u, updateEnds, true);
1075                         } else {
1076                                 expandPathLeg(u, type);
1077                         }
1078                 } else {
1079                         processPathLeg(u, updateEnds, true);
1080                 }
1081         }
1082
1083         private static void updateDirectedPathLeg(UpdateStruct2 u, PathLegUpdateType lengthChange) throws Exception {
1084                 if (LOGGER.isTraceEnabled())
1085                         LOGGER.trace("PipingRules.updateDirectedPipeRun() " + u + " " + lengthChange);
1086                 PipeControlPoint dcp;
1087                 PipeControlPoint other;
1088                 boolean canMoveOther = false;
1089                 boolean dcpStart = false;
1090                 boolean inlineEnd = false;
1091                 Vector3d position;
1092                 if (asDirected(u.start, Direction.NEXT)) {
1093                         dcp = u.start;
1094                         other = u.end;
1095                         position = u.startPoint;
1096                         dcpStart = true;
1097                         if (!u.reversed)
1098                 canMoveOther = true;
1099                         inlineEnd = u.end.isInline();
1100
1101                 } else {
1102                         dcp = u.end;
1103                         other = u.start;
1104                         position = u.endPoint;
1105                         if (u.reversed)
1106                 canMoveOther = true;
1107                         inlineEnd = u.start.isInline();
1108                 }
1109
1110                 Vector3d directedDirection = direction(dcp, dcpStart ? Direction.NEXT : Direction.PREVIOUS);
1111                 if (directedDirection == null) {
1112                         //updateTurnControlPointTurn(dcp, dcp.getPrevious(), dcp.getNext());
1113                         updateTurnControlPointTurn(dcp, null, null);
1114                         directedDirection = direction(dcp, dcpStart ? Direction.NEXT : Direction.PREVIOUS);
1115                         if (directedDirection == null) {
1116                                 return;
1117                         }
1118                 }
1119
1120                 Point3d otherPosition = new Point3d(dcpStart ? u.endPoint : u.startPoint);
1121                 if (u.hasOffsets) {
1122                         Vector3d dir = dcp.getDirection(dcpStart ? Direction.NEXT : Direction.PREVIOUS);
1123                         if (!dcpStart)
1124                                 dir.negate();
1125
1126                         Vector3d offset = new Vector3d();
1127                         calculateDirectedOffset(u.startPoint, u.endPoint, u.start, u.list, u.end, dir, offset);
1128                         u.dir = dir;
1129                         u.offset = offset;
1130
1131                         if (dcpStart)
1132                                 otherPosition.sub(offset);
1133                         else
1134                                 otherPosition.add(offset);
1135                 }
1136
1137                 double mu[] = new double[2];
1138
1139                 Vector3d closest;
1140                 Vector3d t = new Vector3d();
1141
1142                 closest = MathTools.closestPointOnStraight(otherPosition, position, directedDirection, mu);
1143                 t.sub(closest, otherPosition);
1144
1145                 double distance = t.length();
1146                 boolean aligned = (distance < ALLOWED_OFFSET);
1147                 double requiredSpace  = 0.0;
1148                 if (other.isVariableAngle()) {
1149                     requiredSpace = spaceForTurn(other, dcp);
1150                 }
1151                 if (mu[0] < requiredSpace) {
1152                     // At the moment, if next component is directly behind the nozzle, we must force moving the other component.
1153                     // Trying to solve the situation by adding new turn creates infinite loop...
1154                     aligned = false;
1155                     canMoveOther = true;
1156                 }
1157                 if (aligned) {
1158                         //if (u.start.isInline() || u.end.isInline() || u.start.asFixedAngle() || u.end.asFixedAngle())
1159                     //    processPathLeg(u, true, false);
1160                         checkExpandPathLeg(u, lengthChange, inlineEnd || u.start.isInline() || u.end.isInline() || u.start.asFixedAngle() || u.end.asFixedAngle());
1161                 } else {
1162                         if (u.iter > 0) {
1163                                 backIter(u);
1164                         } else {
1165                                 PipeControlPoint nextToMoved;
1166
1167                                 if (u.list.size() > 0)
1168                                         if (dcpStart)
1169                                                 nextToMoved = u.list.get(0);
1170                                         else
1171                                                 nextToMoved = u.list.get(u.list.size() - 1);
1172                                 else if (dcpStart)
1173                                         nextToMoved = u.end;
1174                                 else
1175                                         nextToMoved = u.start;
1176                                 if (other.isVariableAngle()) {
1177
1178                                         // TODO calculate needed space from next run end.
1179                                     if (mu[0] < requiredSpace) {
1180                                                 if (dcpStart) {
1181                                                         closest.set(u.startPoint);
1182                                                 } else {
1183                                                         closest.set(u.endPoint);
1184                                                 }
1185                                                 Vector3d v = new Vector3d(directedDirection);
1186                                                 v.scale(requiredSpace);
1187                                                 closest.add(v);
1188                                         }
1189
1190                                         if (canMoveOther) {
1191                                                 if (LOGGER.isTraceEnabled())
1192                                                         LOGGER.trace("PipingRules.updateDirectedPipeRun() moved end " + other + " to " + closest);
1193
1194                                                 // Not aligned - we need to recalculate the offset to reflect new end points.
1195                                                 Vector3d offset;
1196                                                 if (u.hasOffsets) {
1197                                                         offset = new Vector3d();
1198                                                         Vector3d newDir = new Vector3d();
1199                                                         calculateDirectedOffset(position, closest, u.start, u.list, u.end, newDir, offset);
1200                                                         closest.add(offset);
1201                                                 } else {
1202                                                         offset = new Vector3d();
1203                                                 }
1204
1205                                                 other.setWorldPosition(closest);
1206
1207                                                 if (dcpStart) {
1208                                                         checkExpandPathLeg(new UpdateStruct2(u.start, u.startPoint, u.list, u.end, new Vector3d(closest), directedDirection, offset, u.hasOffsets, u.iter, u.reversed, u.toRemove, u.updated), PathLegUpdateType.NONE, true);
1209                                                         if (u.end.getNext() != null)
1210                                                                 updatePathLegNext(u.end, u.updated, PathLegUpdateType.NEXT);
1211                                                 } else {
1212                                                         checkExpandPathLeg(new UpdateStruct2(u.start, new Vector3d(closest), u.list, u.end, u.endPoint, directedDirection, offset, u.hasOffsets, u.iter, u.reversed, u.toRemove, u.updated), PathLegUpdateType.NONE, true);
1213                                                         if (u.start.getPrevious() != null)
1214                                                                 updatePathLegPrev(u.start, u.updated, PathLegUpdateType.PREV);
1215                                                 }
1216                                         } else {
1217                                                 // TODO : calculate needed space from next run end.
1218                                                 if (allowInsertRemove)
1219                                                         insertElbowUpdate(u, dcp, nextToMoved, dcpStart, position, directedDirection);
1220                                                 else
1221                                                         triedIR = true;
1222                                         }
1223                                 } else if (other.isNonDirected() && other.getParentPoint() != null) {
1224                                         // FIXME : this code was for updating branches
1225                                         Vector3d bintersect = new Vector3d();
1226                                         PipeControlPoint bcp = other.getParentPoint();
1227                                         if (bcp != null && canMoveOther) {
1228                                                 Point3d bstart = new Point3d();
1229                                                 Point3d bend = new Point3d();
1230                                                 Vector3d bdir = new Vector3d();
1231                                                 bcp.getInlineControlPointEnds(bstart, bend, bdir);
1232                                                 Vector3d nintersect = new Vector3d();
1233
1234                                                 MathTools.intersectStraightStraight(position, directedDirection, bend, bdir, nintersect, bintersect, mu);
1235                                                 Vector3d dist = new Vector3d(nintersect);
1236                                                 dist.sub(bintersect);
1237                                                 canMoveOther = mu[1] > 0.0 && mu[1] < 1.0 && dist.lengthSquared() < 0.01;
1238                                         } else {
1239                                                 // TODO : endControlPoints are undirected: calculcate
1240                                                 // correct position for it
1241                                                 throw new UnsupportedOperationException("not implemented");
1242                                         }
1243                                         if (canMoveOther) {
1244                                                 if (LOGGER.isTraceEnabled())
1245                                                         LOGGER.trace("PipingRules.updateDirectedPipeRun() moved end " + other + " to " + bintersect);
1246                                                 // is required branch position is in possible range
1247                                                 bcp.setWorldPosition(bintersect);
1248                                                 if (dcpStart) {
1249                                                         checkExpandPathLeg(new UpdateStruct2(u.start, u.startPoint, u.list, u.end, new Vector3d(bintersect), directedDirection, u.offset, u.hasOffsets, u.iter, u.reversed, u.toRemove, u.updated), lengthChange);
1250                                                 } else {
1251                                                         checkExpandPathLeg(new UpdateStruct2(u.start, new Vector3d(bintersect), u.list, u.end, u.endPoint, directedDirection, u.offset, u.hasOffsets, u.iter, u.reversed, u.toRemove, u.updated), lengthChange);
1252                                                 }
1253                                         } else {
1254                                                 // branch cannot be moved into right position, new turn
1255                                                 // / elbow must be inserted
1256                                                 if (allowInsertRemove)
1257                                                         insertElbowUpdate(u, dcp, nextToMoved, dcpStart, position, directedDirection);
1258                                                 else
1259                                                         triedIR = true;
1260                                         }
1261
1262                                 } else { // assume that control point cannot be moved, but can
1263                                                         // be rotated
1264                                         if (allowInsertRemove)
1265                                                 insertElbowUpdate(u, dcp, nextToMoved, dcpStart, position, directedDirection);
1266                                         else
1267                                                 triedIR = true;
1268                                 }
1269                         }
1270                 }
1271         }
1272
1273         private static void updateDualDirectedPathLeg(UpdateStruct2 u, PathLegUpdateType lengthChange) throws Exception {
1274                 if (LOGGER.isTraceEnabled())
1275                         LOGGER.trace("PipingRules.updateDualDirectedPipeRun() " + u + " " + lengthChange);
1276
1277                 PipeControlPoint dcp1 = u.start;
1278                 PipeControlPoint dcp2 = u.end;
1279                 Point3d position1 = new Point3d(u.startPoint);
1280                 Point3d position2 = new Point3d(u.endPoint);
1281
1282                 Vector3d dir = u.start.getDirection(Direction.NEXT), offset = new Vector3d();
1283                 calculateDirectedOffset(new Vector3d(position1), new Vector3d(position2), u.start, u.list, u.end, dir, offset);
1284
1285                 Point3d position1offset = new Point3d(position1);
1286                 position1offset.add(offset);
1287                 Point3d position2offset = new Point3d(position2);
1288                 position2offset.sub(offset);
1289                 Vector3d dir1 = direction(dcp1, Direction.NEXT);
1290                 Vector3d dir2 = direction(dcp2, Direction.PREVIOUS);
1291
1292                 Vector3d p1 = MathTools.closestPointOnStraight(position1, position2offset, dir2);
1293                 Vector3d p2 = MathTools.closestPointOnStraight(position2, position1offset, dir1);
1294                 double d1 = position1.distance(new Point3d(p1));
1295                 double d2 = position2.distance(new Point3d(p2));
1296
1297                 boolean aligned = (d1 < ALLOWED_OFFSET && d2 < ALLOWED_OFFSET);
1298                 if (aligned) {
1299                         processPathLeg(u);
1300                 } else {
1301                         if (u.iter > 0) {
1302                                 backIter(u);
1303                         } else if (allowInsertRemove){
1304                                 PipeControlPoint dcp;
1305                                 PipeControlPoint next;
1306                                 if (!u.reversed) {
1307                                         dcp = dcp1;
1308                                         if (u.list.size() > 0)
1309                                                 next = u.list.get(0);
1310                                         else
1311                                                 next = dcp2;
1312                                 } else {
1313                                         dcp = dcp2;
1314                                         if (u.list.size() > 0)
1315                                                 next = u.list.get(u.list.size() - 1);
1316                                         else
1317                                                 next = dcp1;
1318                                 }
1319
1320                                 p1 = dcp.getWorldPosition();
1321                                 Vector3d v = new Vector3d();
1322                                 if (!u.reversed)
1323                                         v.set(dir1);
1324                                 else
1325                                         v.set(dir2);
1326
1327                                 // Reserve space for 90 deg elbow
1328                                 double off = dcp1.getPipeRun().getTurnRadius();
1329                                 v.scale(off);
1330                                 p1.add(v);
1331
1332                                 if (!u.reversed)
1333                                         p2 = MathTools.closestPointOnStraight(new Point3d(p1), position2offset, dir2);
1334                                 else
1335                                         p2 = MathTools.closestPointOnStraight(new Point3d(p1), position1offset, dir1);
1336
1337                                 // By default, the elbows are placed next to each other, by using 90 deg angles.
1338                                 // If the distance between elbows is not enough, we must move the other elbow (and create more shallow angle elbows)
1339                                 if (MathTools.distance(p1, p2) < off*2.05) {
1340                                         p2.add(v);
1341                                 }
1342
1343                                 PipeControlPoint tcp1 = insertElbow(dcp, next, p1);
1344                                 PipeControlPoint tcp2 = insertElbow(tcp1, next, p2);
1345
1346                                 if (LOGGER.isTraceEnabled())
1347                                         LOGGER.trace("PipingRules.updateDualDirectedPipeRun() created two turns " + tcp1 + " " + tcp2);
1348
1349                                 if (!u.reversed) {
1350                                         Vector3d dd = new Vector3d(p2);
1351                                         dd.sub(p1);
1352                                         dir2.negate();
1353                                         updatePathLegNext(u.start, u.updated, PathLegUpdateType.NONE);
1354                                         updatePathLegNext(tcp1, u.updated, PathLegUpdateType.NONE);
1355                                         if (!u.reversed)
1356                                                 updatePathLegNext(tcp2, u.updated, PathLegUpdateType.NONE);
1357                                         else
1358                                                 updatePathLegPrev(tcp2, u.updated, PathLegUpdateType.NONE);
1359                                 } else {
1360                                         Vector3d dd = new Vector3d(p1);
1361                                         dd.sub(p2);
1362                                         dir2.negate();
1363                                         updatePathLegNext(tcp1, u.updated, PathLegUpdateType.NONE);
1364                                         updatePathLegNext(tcp2, u.updated, PathLegUpdateType.NONE);
1365                                         if (!u.reversed)
1366                                                 updatePathLegNext(u.start, u.updated, PathLegUpdateType.NONE);
1367                                         else
1368                                                 updatePathLegPrev(u.start, u.updated, PathLegUpdateType.NONE);
1369                                 }
1370                         } else {
1371                                 triedIR = true;
1372                         }
1373                 }
1374
1375         }
1376
1377         private static double spaceForTurn(PipeControlPoint tcp, PipeControlPoint dcp) {
1378                 // TODO : if the path legs contain offset, using just positions of opposite path leg ends is not enough.
1379             // TODO : current iterative way for calculating required space may return longer length that is required.
1380                 double tr = ((TurnComponent)tcp.getPipelineComponent()).getTurnRadius();
1381             if (dcp == null)
1382                 return tr; // space for 90 deg
1383             PipeControlPoint ne = tcp.findNextEnd();
1384             PipeControlPoint pe = tcp.findPreviousEnd();
1385             PipeControlPoint other = null;
1386             if (dcp == ne)
1387                 other = pe;
1388             else if (dcp == pe)
1389                 other = ne;
1390             else
1391                 return tr; // space for 90 deg
1392             if (other == null)
1393                 return tr; // space for 90 deg
1394             Vector3d dir = dcp.getDirectedControlPointDirection();
1395             Vector3d dir2;
1396             if (other == ne) {
1397                 dir2 = pathLegDirection(tcp);
1398             } else {
1399                 dir2 = pathLegDirection(pe);
1400                 dir2.negate();
1401             }
1402
1403             double d = dir.dot(dir2);
1404             if (d > 0.9999)
1405                 return 0.0; // point following turn is directly in the front of the nozzle.
1406             else if (d < -0.9999)
1407             return tr*2.0; // point following turn is directly behind the nozzle, in theory, we should return Double.Inf...
1408
1409             double curr = 0.0;
1410             int iter = 10;
1411             Vector3d tp0 = tcp.getPosition();
1412             try {
1413                     Vector3d dp = dcp.getWorldPosition();
1414                     while (iter > 0) {
1415                         Vector3d tp = new Vector3d(dir);
1416                         tp.scaleAdd(curr, dp);
1417                         tcp._setPosition(tp); // no firing of listeners here
1418                             if (other == ne) {
1419                                 dir2 = pathLegDirection(tcp);
1420                             } else {
1421                                 dir2 = pathLegDirection(pe);
1422                                 dir2.negate();
1423                             }
1424
1425                         double a = dir.angle(dir2);
1426
1427                         // other is directly between dcp and tcp, a zero angle turn should do
1428                         if (Math.PI - a <= MathTools.NEAR_ZERO)
1429                             return 0.0;
1430
1431                         double R = tr * Math.tan(a * 0.5);
1432                         if (R <= curr)
1433                             break;
1434                         curr = R*1.001;
1435                         iter--;
1436                     }
1437             }
1438             finally {
1439                 tcp._setPosition(tp0); // return the original value
1440             }
1441             return curr;
1442         }
1443
1444         private static void insertElbowUpdate(UpdateStruct2 u, PipeControlPoint dcp, PipeControlPoint next, boolean dcpStart, Vector3d position, Vector3d directedDirection) throws Exception{
1445
1446
1447 //              Vector3d closest = new Vector3d(position);
1448 //              closest.add(directedDirection);
1449
1450                 PipeControlPoint tcp = null;
1451                 Vector3d closest = new Vector3d(directedDirection);
1452                 closest.scaleAdd(dcp.getPipeRun().getTurnRadius(), position);
1453                 if (dcpStart) {
1454                         tcp = insertElbow(dcp, next, closest);
1455                 } else {
1456                         tcp = insertElbow(next, dcp, closest);
1457                 }
1458
1459                 double s = spaceForTurn(tcp,dcp);
1460                 Vector3d p = new Vector3d(directedDirection);
1461                 p.scaleAdd(s, position);
1462                 tcp.setPosition(p);
1463                 closest = p;
1464
1465                 if (LOGGER.isTraceEnabled())
1466                         LOGGER.trace("PipingRules.updateDirectedPipeRun() inserted " + tcp);
1467
1468                 if (dcpStart) {
1469                         // update pipe run from new turn to other end
1470                         ppNoDir(tcp, new Vector3d(closest), u.list, u.end, u.endPoint, u.hasOffsets, u.iter, u.reversed, u.toRemove, u.updated);
1471                         // update pipe run from directed to new turn
1472                         processPathLeg(new UpdateStruct2(u.start, u.startPoint, new ArrayList<PipeControlPoint>(), tcp, new Vector3d(closest), directedDirection, new Vector3d(), false, 0, false, new ArrayList<ExpandIterInfo>(), u.updated));
1473                 } else {
1474                         // update pipe run from other end to new turn
1475                         ppNoDir(u.start, u.startPoint, u.list, tcp, new Vector3d(closest), u.hasOffsets, u.iter, u.reversed, u.toRemove, u.updated);
1476                         // update pipe run from new turn to directed
1477                         processPathLeg(new UpdateStruct2(tcp, new Vector3d(closest), new ArrayList<PipeControlPoint>(), u.end, u.endPoint, directedDirection, new Vector3d(), false, 0, false, new ArrayList<ExpandIterInfo>(), u.updated));
1478                 }
1479         }
1480
1481         /**
1482          * Checks if turns can be removed (turn angle near zero)
1483          */
1484         private static int checkTurns(UpdateStruct2 u, PathLegUpdateType lengthChange) throws Exception {
1485                 if (LOGGER.isTraceEnabled())
1486                         LOGGER.trace("PipingRules.checkTurns() " + u.start + " " + u.end);
1487                 boolean startRemoved = false;
1488                 boolean endRemoved = false;
1489                 if (u.start.isVariableAngle()) {
1490                         // this won't work properly if inline control points are not updated
1491                         PipeControlPoint startPrev = u.start.getPrevious();
1492                         if (startPrev != null) {
1493                                 double a = updateTurnControlPointTurn(u.start, null, u.dir);
1494                                 if (a < MIN_TURN_ANGLE && u.start.isDeletable())
1495                                         startRemoved = true;
1496                                 else if (lengthChange == PathLegUpdateType.PREV || lengthChange == PathLegUpdateType.PREV_S) {
1497                                         PathLegUpdateType type;
1498                                         if (lengthChange == PathLegUpdateType.PREV_S)
1499                                                 type = PathLegUpdateType.PREV;
1500                                         else
1501                                                 type = PathLegUpdateType.NONE;
1502                                         updatePathLegPrev(u.start, u.start, type);
1503                                 }
1504                         }
1505                 }
1506                 if (u.end.isVariableAngle()) {
1507
1508                         PipeControlPoint endNext = u.end.getNext();
1509                         if (endNext != null) {
1510                                 // TODO: u.end, u.dir, null
1511                                 double a = updateTurnControlPointTurn(u.end, null, null);
1512                                 if (a < MIN_TURN_ANGLE && u.end.isDeletable())
1513                                         endRemoved = true;
1514                                 else if (lengthChange == PathLegUpdateType.NEXT || lengthChange == PathLegUpdateType.NEXT_S) {
1515                                         PathLegUpdateType type;
1516                                         if (lengthChange == PathLegUpdateType.NEXT_S)
1517                                                 type = PathLegUpdateType.NEXT;
1518                                         else
1519                                                 type = PathLegUpdateType.NONE;
1520                                         updatePathLegNext(u.end, u.end, type);
1521                                 }
1522                         }
1523                 }
1524                 if (LOGGER.isTraceEnabled())
1525                         LOGGER.trace("PipingRules.checkTurns() res " + startRemoved + " " + endRemoved);
1526                 if (!startRemoved && !endRemoved)
1527                         return REMOVE_NONE;
1528                 if (startRemoved && endRemoved)
1529                         return REMOVE_BOTH;
1530                 if (startRemoved)
1531                         return REMOVE_START;
1532                 return REMOVE_END;
1533         }
1534
1535         /**
1536          * Expands piperun search over turns that are going to be removed
1537          *
1538          */
1539         private static void expandPathLeg(UpdateStruct2 u, int type) throws Exception {
1540                 if (LOGGER.isTraceEnabled())
1541                         LOGGER.trace("PipingRules.expandPipeline " + u.start + " " + u.end);
1542                 ArrayList<PipeControlPoint> newList = new ArrayList<PipeControlPoint>();
1543                 switch (type) {
1544                 case REMOVE_NONE:
1545                         throw new RuntimeException("Error in piping rules");
1546                 case REMOVE_START:
1547                         u.toRemove.add(new ExpandIterInfo(u.start, REMOVE_START));
1548                         u.start = u.start.findPreviousEnd();
1549                         u.startPoint = u.start.getPosition();
1550                         u.start.findNextEnd(newList);
1551                         newList.addAll(u.list);
1552                         u.list = newList;
1553                         break;
1554                 case REMOVE_END:
1555                         u.toRemove.add(new ExpandIterInfo(u.end, REMOVE_END));
1556                         u.end = u.end.findNextEnd(newList);
1557                         u.endPoint = u.end.getPosition();
1558                         u.list.addAll(newList);
1559                         break;
1560                 case REMOVE_BOTH:
1561                         u.toRemove.add(new ExpandIterInfo(u.start, u.end));
1562                         u.start = u.start.findPreviousEnd();
1563                         u.startPoint = u.start.getPosition();
1564                         u.start.findNextEnd(newList);
1565                         newList.addAll(u.list);
1566                         u.list = newList;
1567                         newList = new ArrayList<PipeControlPoint>();
1568                         u.end = u.end.findNextEnd(newList);
1569                         u.endPoint = u.end.getPosition();
1570                         u.list.addAll(newList);
1571                         break;
1572                 default:
1573                         throw new RuntimeException("Error in piping rules");
1574
1575                 }
1576                 u.offset = new Vector3d();
1577                 if (u.hasOffsets) {
1578                         u.dir.normalize();
1579                         for (PipeControlPoint icp : u.list) {
1580                                 if (icp.isOffset()) {
1581                                         u.offset.add(icp.getSizeChangeOffsetVector(u.dir));
1582                                 } else if (icp.isDualSub())
1583                                         ErrorLogger.defaultLogError("Updating pipe run, found offset controlpoint " + icp, new Exception("ASSERT!"));
1584                         }
1585                 }
1586                 if (LOGGER.isTraceEnabled())
1587                         LOGGER.trace("PipingRules.expandPipeline expanded " + u.start + " " + u.end);
1588                 u.iter++;
1589                 updatePathLeg(u, PathLegUpdateType.NONE);
1590         }
1591
1592         /**
1593          * reverts one iteration of turn removing back)
1594          */
1595         private static void backIter(UpdateStruct2 u) throws Exception {
1596
1597                 if (LOGGER.isTraceEnabled())
1598                         LOGGER.trace("PipingRules.backIter" + u.start + " " + u.end);
1599                 if (u.iter == 0)
1600                         throw new RuntimeException("Error in piping rules");
1601                 ExpandIterInfo info = u.toRemove.get(u.toRemove.size() - 1);
1602                 u.toRemove.remove(u.toRemove.size() - 1);
1603                 if (info.getType() == REMOVE_START || info.getType() == REMOVE_BOTH) {
1604                         while (u.list.size() > 0) {
1605                                 PipeControlPoint icp = u.list.get(0);
1606                                 if (icp.getPrevious().equals(info.getStart()))
1607                                         break;
1608                                 u.list.remove(icp);
1609                         }
1610                         u.start = info.getStart();
1611                 }
1612                 if (info.getType() == REMOVE_END || info.getType() == REMOVE_BOTH) {
1613                         while (u.list.size() > 0) {
1614                                 PipeControlPoint icp = u.list.get(u.list.size() - 1);
1615                                 if (icp.getNext().equals(info.getEnd()))
1616                                         break;
1617                                 u.list.remove(icp);
1618                         }
1619                         u.end = info.getEnd();
1620                 }
1621                 u.offset = new Vector3d();
1622                 if (u.hasOffsets) {
1623                         u.dir.normalize();
1624                         for (PipeControlPoint icp : u.list) {
1625                                 if (icp.isOffset()) {
1626                                         u.offset.add(icp.getSizeChangeOffsetVector(u.dir));
1627                                 } else if (icp.isDualSub())
1628                                         ErrorLogger.defaultLogError("Updating pipe run, found offset controlpoint " + icp, new Exception("ASSERT!"));
1629                         }
1630                 }
1631                 processPathLeg(u);
1632
1633         }
1634
1635         /**
1636          * Processes pipe run (removes necessary turns and updates run ends)
1637          */
1638         // private static void processPathLeg(PipeControlPoint start, Point3d
1639         // startPoint,ArrayList<InlineControlPoint> list, PipeControlPoint
1640         // end,Point3d endPoint, Vector3d dir,Vector3d offset, boolean
1641         // hasOffsets,int iter, boolean reversed, ArrayList<ExpandIterInfo>
1642         // toRemove) throws TransactionException {
1643
1644         private static void processPathLeg(UpdateStruct2 u) throws Exception {
1645                 if (LOGGER.isTraceEnabled())
1646                         LOGGER.trace("PipingRules.processPathLeg " + u.start + " " + u.end);
1647                 processPathLeg(u, true, true);
1648         }
1649
1650         private static void processPathLeg(UpdateStruct2 u, boolean updateEnds, boolean updateInline) throws Exception {
1651                 if (LOGGER.isTraceEnabled())
1652                         LOGGER.trace("PipingRules.processPathLeg " + (updateEnds ? "ends " : "") + (updateInline ? "inline " : "") + u.start + " " + u.end);
1653
1654                 if (u.toRemove.size() > 0) {
1655                         for (ExpandIterInfo info : u.toRemove) {
1656                                 if (info.getStart() != null) {
1657                                         if (LOGGER.isTraceEnabled())
1658                                                 LOGGER.trace("PipingRules.processPathLeg removing start " + info.getStart());
1659                                         info.getStart()._remove();
1660                                 }
1661                                 if (info.getEnd() != null) {
1662                                         if (LOGGER.isTraceEnabled())
1663                                                 LOGGER.trace("PipingRules.processPathLeg removing end " + info.getEnd());
1664                                         info.getEnd()._remove();
1665                                 }
1666                         }
1667                         // ControlPointTools.removeControlPoint may remove more than one CP;
1668                         // we must populate inline CP list again.
1669                         u.list.clear();
1670                         u.start.findNextEnd( u.list);
1671                 }
1672                 // FIXME : inline CPs are update twice because their positions must be
1673                 // updated before and after ends.
1674                 updateInlineControlPoints(u, false);
1675
1676                 if (updateEnds) {
1677                         if (u.start.isTurn()) {
1678                                 //updateTurnControlPointTurn(u.start, u.start.getPrevious(), u.start.getNext());
1679                                 updateTurnControlPointTurn(u.start, null, null);
1680 //                              updatePathLegPrev(u.start, u.start, PathLegUpdateType.NONE);
1681                         } else if (u.start.isEnd()) {
1682                                 updateEndComponentControlPoint(u.start, u.dir);
1683                         } else if (u.start.isInline()) {
1684                                 u.start.orientToDirection(u.dir);
1685                         }
1686                         if (u.end.isTurn()) {
1687                                 //updateTurnControlPointTurn(u.end, u.end.getPrevious(), u.end.getNext());
1688                                 updateTurnControlPointTurn(u.end, null, null);
1689 //                              updatePathLegNext(u.end, u.end, PathLegUpdateType.NONE);
1690                         } else if (u.end.isEnd()) {
1691                                 updateEndComponentControlPoint(u.end, u.dir);
1692                         } else if (u.end.isInline()) {
1693                                 u.end.orientToDirection(u.dir);
1694                         }
1695
1696                 } else {
1697                         if (u.start.isEnd()) {
1698                                 updateEndComponentControlPoint(u.start, u.dir);
1699                         }
1700                         if (u.end.isEnd()) {
1701                                 updateEndComponentControlPoint(u.end, u.dir);
1702                         }
1703                 }
1704                 if (updateInline)
1705                         updateInlineControlPoints(u, true);
1706
1707         }
1708
1709         /**
1710          * Processes pipe run and recalculates offset
1711          */
1712         // private static void processPathLeg(PipeControlPoint start, Point3d
1713         // startPoint,ArrayList<InlineControlPoint> list, PipeControlPoint
1714         // end,Point3d endPoint, Vector3d dir, boolean hasOffsets,int iter, boolean
1715         // reversed, ArrayList<ExpandIterInfo> toRemove) throws TransactionException
1716         // {
1717         @SuppressWarnings("unused")
1718         private static void processPathLegNoOffset(UpdateStruct2 u) throws Exception {
1719                 if (LOGGER.isTraceEnabled())
1720                         LOGGER.trace("PipingRules.processPathLeg " + u.start + " " + u.end);
1721                 Vector3d offset = new Vector3d();
1722                 if (u.hasOffsets) {
1723                         u.dir.normalize();
1724                         for (PipeControlPoint icp : u.list) {
1725                                 if (icp.isOffset()) {
1726                                         offset.add(icp.getSizeChangeOffsetVector(u.dir));
1727                                 } else if (icp.isDualSub()) {
1728                                         ErrorLogger.defaultLogError("Updating pipe run, found offset controlpoint " + icp, new Exception("ASSERT!"));
1729                                 }
1730                         }
1731                 }
1732                 processPathLeg(u);
1733         }
1734
1735         private static void updateOffsetPoint(PipeControlPoint sccp, Vector3d offset) {
1736                 Vector3d world = sccp.getWorldPosition();
1737                 world.add(offset);
1738                 PipeControlPoint ocp = sccp.getDualSub();
1739                 ocp.setWorldPosition(world);
1740         }
1741
1742         /**
1743          * Updates InlineControlPoints position when straight pipe's end(s) have
1744          * been changed)
1745          *
1746          * @param pipeline
1747          * @param icp
1748          * @param nextPoint
1749          * @param prevPoint
1750          */
1751         private static void updateInlineControlPoint(PipeControlPoint icp, Vector3d prev, Vector3d next,  Vector3d dir) {
1752                 if (LOGGER.isTraceEnabled())
1753                         LOGGER.trace("PipingRules.updateInlineControlPoint() " + icp);
1754
1755                 Vector3d inlinePoint = icp.getWorldPosition();
1756                 Vector3d prevPoint = new Vector3d(prev);
1757                 Vector3d nextPoint = new Vector3d(next);
1758                 if (!icp.isVariableLength()) {
1759                         // Reserve space for fixed length components.
1760                         MathTools.mad(prevPoint, dir, icp.getInlineLength());
1761                         MathTools.mad(nextPoint, dir, -icp.getInlineLength());
1762                         if (MathTools.distance(prevPoint, nextPoint) < ALLOWED_OFFSET) {
1763                                 prevPoint = prev;
1764                                 nextPoint = next;
1765                         }
1766                 }
1767                 boolean canCalc = MathTools.distance(prevPoint, nextPoint) > ALLOWED_OFFSET;
1768                 if (LOGGER.isTraceEnabled())
1769                         System.out.print("InlineControlPoint update " + icp + " " + inlinePoint + " " + prevPoint + " " + nextPoint);
1770                 Vector3d newInlinePoint = null;
1771                 if (canCalc) {
1772                         boolean branchUpdate = false;
1773                         PipeControlPoint becp = null;
1774                         for (PipeControlPoint pcp : icp.getChildPoints())
1775                                 if (pcp.isNonDirected()) {
1776                                         branchUpdate = true;
1777                                         becp = pcp;
1778                                         break;
1779                                 }
1780
1781                         if (DUMMY || !branchUpdate) {
1782                                 newInlinePoint = MathTools.closestPointOnEdge(new Vector3d(inlinePoint), prevPoint, nextPoint);
1783
1784                         } else {
1785
1786                                 // FIXME : can only handle one branch
1787                                 PipeControlPoint p = null;
1788                                 if (becp.getNext() != null) {
1789                                         p = becp.findNextEnd();
1790                                 } else if (becp.getPrevious() != null) {
1791                                         p = becp.findPreviousEnd();
1792                                 }
1793                                 if (p == null) {
1794                                         newInlinePoint = MathTools.closestPointOnEdge(new Vector3d(inlinePoint), prevPoint, nextPoint);
1795                                 } else if (canCalc){
1796                                         Vector3d branchLegEnd = p.getWorldPosition();
1797                                         Vector3d dir2 = new Vector3d(inlinePoint);
1798                                         dir2.sub(branchLegEnd);
1799                                         Vector3d dir1 = new Vector3d(nextPoint);
1800                                         dir1.sub(prevPoint);
1801                                         newInlinePoint = new Vector3d();
1802                                         double mu[] = new double[2];
1803                                         MathTools.intersectStraightStraight(new Vector3d(prevPoint), dir1, new Vector3d(branchLegEnd), dir2, newInlinePoint, new Vector3d(), mu);
1804                                         if (LOGGER.isTraceEnabled())
1805                                                 LOGGER.trace(Double.toString(mu[0]));
1806                                         // FIXME : reserve space
1807                                         if (mu[0] < 0.0) {
1808                                                 newInlinePoint = new Vector3d(prevPoint);
1809                                         } else if (mu[0] > 1.0) {
1810                                                 newInlinePoint = new Vector3d(nextPoint);
1811                                         }
1812                                 }
1813                         }
1814                 } else {
1815                         // prevPoint == nextPoint
1816                         newInlinePoint = new Vector3d(prevPoint);
1817                 }
1818                 if (LOGGER.isTraceEnabled())
1819                         LOGGER.trace(" " + newInlinePoint);
1820
1821                 icp.setWorldPosition(newInlinePoint);
1822                 icp.orientToDirection(dir);
1823         }
1824
1825         /**
1826          * Updates InlineControlPoints position when straight pipe's end(s) have
1827          * been changed)
1828          *
1829          * @param pipeline
1830          * @param icp
1831          * @param nextPoint
1832          * @param prevPoint
1833          */
1834         private static void updateEndComponentControlPoint(PipeControlPoint ecp, Vector3d dir) throws Exception {
1835                 if (LOGGER.isTraceEnabled())
1836                         LOGGER.trace("PipingRules.updateEndComponentControlPoint() " + ecp);
1837
1838                 if (!ecp.isFixed()) // prevent overriding nozzle orientations..
1839                         ecp.orientToDirection(dir);
1840
1841                 for (PipeControlPoint pcp : ecp.getChildPoints()) {
1842                         // TODO update position
1843                         updatePathLegEndControlPoint(pcp);
1844                 }
1845         }
1846
1847         /**
1848          * Updates all branches when branch's position has been changed
1849          *
1850          * @param bcp
1851          */
1852         private static void updateBranchControlPointBranches(PipeControlPoint bcp) throws Exception {
1853                 if (LOGGER.isTraceEnabled())
1854                         LOGGER.trace("PipingRules.updateBranchControlPointBranches() " + bcp);
1855                 if (bcp.isDualInline())
1856                         return;
1857                 Collection<PipeControlPoint> branches = bcp.getChildPoints();
1858                 if (branches.size() == 0) {
1859                         if (LOGGER.isTraceEnabled())
1860                                 LOGGER.trace("No Branches found");
1861                         return;
1862                 }
1863
1864                 for (PipeControlPoint pcp : branches) {
1865                         updatePathLegEndControlPoint(pcp);
1866                 }
1867         }
1868
1869         private static double updateTurnControlPointTurn(PipeControlPoint tcp, Vector3d prev, Vector3d next) {
1870                 if (next == null) {
1871                         UpdateStruct2 us = createUS(tcp, Direction.NEXT, 0, new ArrayList<PipingRules.ExpandIterInfo>(), tcp);
1872                         if (us != null)
1873                                 next = us.dir;
1874                 }
1875                 if (prev == null) {
1876                         UpdateStruct2 us = createUS(tcp, Direction.PREVIOUS, 0, new ArrayList<PipingRules.ExpandIterInfo>(), tcp);
1877                         if (us != null) {
1878                                 prev = us.dir;
1879                         }
1880                 }
1881
1882                 if (!tcp.asFixedAngle()) {
1883
1884
1885                         if (next == null || prev == null) {
1886                                 if (tcp.getTurnAngle() != null)
1887                                         return tcp.getTurnAngle();
1888                                 return Math.PI; // FIXME : argh
1889                         }
1890
1891                         final boolean isDegenerate = prev.lengthSquared() < MathTools.NEAR_ZERO || next.lengthSquared() < MathTools.NEAR_ZERO;
1892                         double turnAngle = isDegenerate ? 0.0 : prev.angle(next);
1893
1894                         Vector3d turnAxis = new Vector3d();
1895                         turnAxis.cross(prev, next);
1896                         if (turnAxis.lengthSquared() > MathTools.NEAR_ZERO) {
1897                                 double elbowRadius = ((TurnComponent)tcp.getPipelineComponent()).getTurnRadius();
1898                                 double R = elbowRadius * Math.tan(turnAngle * 0.5);
1899
1900                                 turnAxis.normalize();
1901                                 tcp.setTurnAngle(turnAngle);
1902                                 tcp.setLength(R);// setComponentOffsetValue(R);
1903                                 tcp.setTurnAxis(turnAxis);
1904         //                      tcp.setPosition(tcp.getPosition());
1905                         } else {
1906                                 turnAngle = 0.0;
1907                                 tcp.setTurnAngle(0.0);
1908                                 tcp.setLength(0.0);
1909                                 tcp.setTurnAxis(new Vector3d(MathTools.Y_AXIS));
1910                         }
1911
1912                         tcp.orientToDirection(prev);
1913
1914                         if (LOGGER.isTraceEnabled())
1915                                 LOGGER.trace("PipingTools.updateTurnControlPointTurn " + prev + " " + next + " " + turnAngle + " " + turnAxis);
1916                         return turnAngle;
1917                 } else {
1918
1919                         if (prev != null && next != null) {
1920                                 // Nothing to do
1921                         } else if (prev == null) {
1922                                 if (!tcp._getReversed())
1923                                         tcp.setReversed(true);
1924                         } else if (next == null) {
1925                                 if (tcp._getReversed())
1926                                         tcp.setReversed(false);
1927                         }
1928
1929                         Vector3d dir = null;
1930                         if (!tcp._getReversed()) {
1931                                 dir = prev;
1932                         } else {
1933                                 dir = next;
1934                                 dir.negate();
1935                         }
1936                         if (dir == null) {
1937                                 return Math.PI; // FIXME : argh
1938                         }
1939
1940                         Quat4d q = tcp.getControlPointOrientationQuat(dir, tcp.getRotationAngle() != null ? tcp.getRotationAngle() : 0.0);
1941                         Vector3d v = new Vector3d();
1942                         MathTools.rotate(q, MathTools.Y_AXIS,v);
1943                         tcp.setTurnAxis(v);
1944                         tcp.setWorldOrientation(q);
1945                         if (tcp.getTurnAngle() != null)
1946                                 return tcp.getTurnAngle();
1947                         return Math.PI; // FIXME : argh
1948                 }
1949
1950
1951         }
1952
1953         public static List<PipeControlPoint> getControlPoints(PipeRun pipeRun) {
1954                 List<PipeControlPoint> list = new ArrayList<PipeControlPoint>();
1955                 if (pipeRun.getControlPoints().size() == 0)
1956                         return list;
1957                 PipeControlPoint pcp = pipeRun.getControlPoints().iterator().next();
1958                 while (pcp.getPrevious() != null) {
1959                         PipeControlPoint prev = pcp.getPrevious();
1960                         if (prev.getPipeRun() != pipeRun && prev.getPipeRun() != null) { // bypass possible corruption
1961                             break;
1962                         }
1963                         pcp = prev;
1964                 }
1965                 if (pcp.isDualSub()) {
1966                         pcp = pcp.getParentPoint();
1967                 }
1968                 list.add(pcp);
1969                 while (pcp.getNext() != null) {
1970                         pcp = pcp.getNext();
1971                         if (pcp.getPipeRun() != pipeRun)
1972                                 break;
1973                         list.add(pcp);
1974                 }
1975                 return list;
1976         }
1977
1978         public static void reverse(PipeRun pipeRun) {
1979
1980                 while (true) {
1981                         List<PipeControlPoint> points = getControlPoints(pipeRun);
1982                         PipeControlPoint pcp = points.get(0);
1983                         if (pcp.isSizeChange() && pcp.getChildPoints().size() > 0) {
1984                                 PipeRun pr = pcp.getPipeRun();
1985                                 if (pr != pipeRun)
1986                                     pipeRun = pr;
1987                                 else break;
1988                         } else {
1989                                 break;
1990                         }
1991                 }
1992                 List<PipeRun> all = new ArrayList<PipeRun>();
1993                 List<List<PipeControlPoint>> pcps = new ArrayList<List<PipeControlPoint>>();
1994                 while (true) {
1995                         all.add(pipeRun);
1996                         List<PipeControlPoint> points = getControlPoints(pipeRun);
1997                         pcps.add(points);
1998                         PipeControlPoint pcp = points.get(points.size()-1);
1999                         if (pcp.getChildPoints().size() > 0) {
2000                                 PipeRun pipeRun2 = pcp.getChildPoints().get(0).getPipeRun();
2001                                 if (pipeRun == pipeRun2)
2002                                     break;
2003                                 else
2004                                     pipeRun = pipeRun2;
2005                         } else {
2006                                 break;
2007                         }
2008                 }
2009                 for (int i = 0 ; i < all.size(); i++) {
2010                         List<PipeControlPoint> list = pcps.get(i);
2011                         _reverse(list);
2012                 }
2013                 for (int i = 0 ; i < all.size(); i++) {
2014                         boolean last = i == all.size() - 1;
2015                         List<PipeControlPoint> list = pcps.get(i);
2016
2017                         if (!last) {
2018                                 List<PipeControlPoint> list2 = pcps.get(i+1);
2019                                 PipeControlPoint prev = list.get(list.size()-1);
2020                                 PipeControlPoint next = list2.get(0);
2021                                 if (prev == next) {
2022                                         // Reverse the component on the boundary.
2023                                         InlineComponent ic = (InlineComponent)prev.getPipelineComponent();
2024                                         PipeRun r1 = ic.getPipeRun();
2025                                         PipeRun r2 = ic.getAlternativePipeRun();
2026                                         if (r1 == null || r2 == null)
2027                                                 throw new RuntimeException("Components on PipeRun changes should refer to bot PipeRuns");
2028                                         ic.deattach();
2029                                         r2.addChild(ic);
2030                                         ic.setPipeRun(r2);
2031                                         ic.setAlternativePipeRun(r1);
2032                                 } else {
2033                                         throw new RuntimeException("PipeRun changes should contain shared control points");
2034                                 }
2035
2036                         }
2037                 }
2038
2039         }
2040
2041         private static void _reverse(List<PipeControlPoint> list) {
2042                 if (list.size() <= 1)
2043                         return; // nothing to do.
2044
2045                 for (int i = 0 ; i < list.size(); i++) {
2046                         boolean first = i == 0;
2047                         boolean last = i == list.size() - 1;
2048                         PipeControlPoint current = list.get(i);
2049                         PipeControlPoint currentSub = null;
2050                         if (current.isDualInline())
2051                                 currentSub = current.getDualSub();
2052                         if (first) {
2053                                 PipeControlPoint next = list.get(i+1);
2054                                 if (next.isDualInline())
2055                                         next = next.getDualSub();
2056                                 if (current.getNext() == next)
2057                                         current.setNext(null);
2058                                 current.setPrevious(next);
2059                                 if (currentSub != null) {
2060                                         if (currentSub.getNext() == next)
2061                                                 currentSub.setNext(null);
2062                                         currentSub.setPrevious(next);
2063                                 }
2064                         } else if (last) {
2065                                 PipeControlPoint prev = list.get(i-1);
2066
2067                                 if (current.getPrevious() == prev)
2068                                         current.setPrevious(null);
2069                                 current.setNext(prev);
2070
2071                                 if (currentSub != null) {
2072                                         if (currentSub.getPrevious() == prev)
2073                                                 currentSub.setPrevious(null);
2074                                         currentSub.setNext(prev);
2075                                 }
2076                         } else {
2077                                 PipeControlPoint prev = list.get(i-1);
2078                                 PipeControlPoint next = list.get(i+1);
2079                                 if (next.isDualInline())
2080                                         next = next.getDualSub();
2081
2082
2083                                 current.setPrevious(next);
2084                                 current.setNext(prev);
2085
2086                                 if (currentSub != null) {
2087                                         currentSub.setPrevious(next);
2088                                         currentSub.setNext(prev);
2089                                 }
2090
2091                         }
2092                         //if (current.isTurn() && current.isFixed()) {
2093                         if (current.asFixedAngle()) {
2094                                 current.setReversed(!current._getReversed());
2095                         }
2096                         if (current.isInline() && current.isReverse()) {
2097                                 current.setReversed(!current._getReversed());
2098                         }
2099                 }
2100         }
2101
2102
2103
2104         public static void validate(PipeRun pipeRun) {
2105                 if (pipeRun == null)
2106                         return;
2107                 synchronized (ruleMutex) {
2108                         Collection<PipeControlPoint> pcps = pipeRun.getControlPoints();
2109                         int count = 0;
2110                         //LOGGER.trace("Validate " + pipeRun.getName());
2111                         for (PipeControlPoint pcp : pcps) {
2112                                 if (pcp.getParentPoint() == null || pcp.getParentPoint().getPipeRun() != pipeRun)
2113                                         count++;
2114                         }
2115                         List<PipeControlPoint> runPcps = getControlPoints(pipeRun);
2116                         if (runPcps.size() != count) {
2117                                 LOGGER.debug("Run " + pipeRun.getName() + " contains unconnected control points, found " + runPcps.size() + " connected, " + pcps.size() + " total.");
2118                                 for (PipeControlPoint pcp : pcps) {
2119                                     if (!runPcps.contains(pcp)) {
2120                                         LOGGER.debug("Unconnected " + pcp + " " + pcp.getPipelineComponent());
2121                                     }
2122                                 }
2123                         }
2124                         for (PipeControlPoint pcp : pcps) {
2125                             if (pcp.getPipeRun() == null) {
2126                                 LOGGER.debug("PipeRun ref missing " + pcp + " " + pcp.getPipelineComponent());
2127                             }
2128                                 if (!pcp.isDirected() && pcp.getNext() == null && pcp.getPrevious() == null)
2129                                         LOGGER.debug("Orphan undirected " + pcp + " " + pcp.getPipelineComponent());
2130                         }
2131                         for (PipeControlPoint pcp : pcps) {
2132                                 if (pcp.getParentPoint() == null) {
2133                                         PipeControlPoint sub = null;
2134                                         if (pcp.isDualInline())
2135                                                 sub = pcp.getDualSub();
2136                                         PipeControlPoint next = pcp.getNext();
2137                                         PipeControlPoint prev = pcp.getPrevious();
2138                                         if (next != null) {
2139                                                 if (!(next.getPrevious() == pcp || next.getPrevious() == sub)) {
2140                                                         LOGGER.debug("Inconsistency between " + pcp + " -> " +next );
2141                                                 }
2142                                         }
2143                                         if (prev != null) {
2144                                                 PipeControlPoint prevParent = null;
2145                                                 if (prev.isDualSub()) {
2146                                                         prevParent = prev.getParentPoint();
2147                                                 } else if (prev.isDualInline()) {
2148                                                         LOGGER.debug("Inconsistency between " + pcp + " <-- " +prev );
2149                                                 }
2150                                                 if (!(prev.getNext() == pcp && (prevParent == null || prevParent.getNext() == pcp))) {
2151                                                         LOGGER.debug("Inconsistency between " + pcp + " <-- " +prev );
2152                                                 }
2153                                         }
2154                                 }
2155                         }
2156                 }
2157         }
2158
2159         public static void splitVariableLengthComponent(PipelineComponent newComponent, InlineComponent splittingComponent, boolean assignPos) throws Exception{
2160                 assert(!splittingComponent.getControlPoint().isFixedLength());
2161                 assert(!(newComponent instanceof  InlineComponent && !newComponent.getControlPoint().isFixedLength()));
2162                 PipeControlPoint newCP = newComponent.getControlPoint();
2163                 PipeControlPoint splittingCP = splittingComponent.getControlPoint();
2164                 PipeControlPoint nextCP = splittingCP.getNext();
2165                 PipeControlPoint prevCP = splittingCP.getPrevious();
2166
2167                 /* there are many different cases to insert new component when
2168                    it splits existing VariableLengthinlineComponent.
2169
2170                    1. VariableLengthComponet is connected from both sides:
2171                           - insert new component between VariableLength component and component connected to it
2172                           - insert new VariableLengthComponent between inserted component and component selected in previous step
2173
2174                    2. VariableLengthComponent is connected from one side
2175                          - Use previous case or:
2176                          - Insert new component to empty end
2177                          - Insert new VariableLength component to inserted components empty end
2178
2179                    3. VariableLength is not connected to any component.
2180                          - Should not be possible, at least in current implementation.
2181                          - Could be done using second case
2182
2183                 */
2184
2185                 if (nextCP == null && prevCP == null) {
2186                         // this should not be possible
2187                         throw new RuntimeException("VariableLengthComponent " + splittingComponent + " is not connected to anything.");
2188                 }
2189                 double newLength = newComponent.getControlPoint().getLength();
2190
2191
2192                 Point3d next = new Point3d();
2193                 Point3d prev = new Point3d();
2194                 splittingCP.getInlineControlPointEnds(prev, next);
2195
2196                 Vector3d newPos = null;
2197                 if (assignPos) {
2198                         newPos = new Vector3d(prev);
2199                         Vector3d dir = new Vector3d(next);
2200                         dir.sub(prev);
2201                         dir.scale(0.5);
2202                         newPos.add(dir);
2203                         newComponent.setWorldPosition(newPos);
2204                 } else {
2205                         newPos = newComponent.getWorldPosition();
2206                 }
2207
2208
2209
2210                 Vector3d dir = new Vector3d(next);
2211                 dir.sub(prev);
2212                 dir.normalize();
2213                 dir.scale(newLength * 0.5);
2214                 Point3d vn = new Point3d(newPos);
2215                 Point3d vp = new Point3d(newPos);
2216                 vn.add(dir);
2217                 vp.sub(dir);
2218                 double ln = vn.distance(next);
2219                 double lp = vp.distance(prev);
2220                 vp.interpolate(prev, 0.5);
2221                 vn.interpolate(next, 0.5);
2222
2223
2224                 if (nextCP == null) {
2225                         newCP.insert(splittingCP, Direction.NEXT);
2226                         insertStraight(newCP, Direction.NEXT, new Vector3d(vn), ln);
2227                         splittingCP.setWorldPosition(new Vector3d(vp));
2228 //                      ControlPointTools.setWorldPosition(splittingCP, vp);
2229 //                      splittingCP.setRelatedScalarDouble(ProcessResource.plant3Dresource.HasLength, lp);
2230                 } else if (prevCP == null) {
2231                         newCP.insert(splittingCP, Direction.PREVIOUS);
2232                         insertStraight(newCP, Direction.PREVIOUS, new Vector3d(vp), lp);
2233                         splittingCP.setWorldPosition(new Vector3d(vn));
2234 //                      splittingCP.setRelatedScalarDouble(ProcessResource.plant3Dresource.HasLength, ln);
2235                 } else {
2236                         newCP.insert(splittingCP, nextCP);
2237                         insertStraight(newCP, nextCP, new Vector3d(vn), ln);
2238                         splittingCP.setWorldPosition(new Vector3d(vp));
2239 //                      splittingCP.setRelatedScalarDouble(ProcessResource.plant3Dresource.HasLength, lp);
2240                 }
2241                 positionUpdate(newCP);
2242
2243         }
2244
2245         public static void addSizeChange(boolean reversed, PipeRun pipeRun, PipeRun other, InlineComponent reducer, PipeControlPoint previous, PipeControlPoint next) {
2246                 PipeControlPoint pcp = reducer.getControlPoint();
2247                 PipeControlPoint ocp = pcp.getDualSub();
2248                 if (!reversed) {
2249                         String name = pipeRun.getUniqueName("Reducer");
2250                         reducer.setName(name);
2251                         pipeRun.addChild(reducer);
2252                         other.addChild(ocp);
2253                         reducer.setAlternativePipeRun(other);
2254
2255                         previous.setNext(pcp);
2256                         pcp.setPrevious(previous);
2257                         ocp.setPrevious(previous);
2258                         if (next != null) {
2259                                 pcp.setNext(next);
2260                                 ocp.setNext(next);
2261                                 next.setPrevious(ocp);
2262                         }
2263                 } else {
2264                         String name = other.getUniqueName("Reducer");
2265                         reducer.setName(name);
2266                         other.addChild(reducer);
2267                         pipeRun.addChild(ocp);
2268                         reducer.setAlternativePipeRun(pipeRun);
2269
2270                         if (next != null) {
2271                                 next.setNext(pcp);
2272                                 pcp.setPrevious(next);
2273                                 ocp.setPrevious(next);
2274                         }
2275                         pcp.setNext(previous);
2276                         ocp.setNext(previous);
2277                         previous.setPrevious(ocp);
2278                 }
2279         }
2280 }