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[modules/shaper.git] / src / SketchPlugin / SketchPlugin_Fillet.cpp
1 // Copyright (C) 2014-2017  CEA/DEN, EDF R&D
2 //
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Lesser General Public
5 // License as published by the Free Software Foundation; either
6 // version 2.1 of the License, or (at your option) any later version.
7 //
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11 // Lesser General Public License for more details.
12 //
13 // You should have received a copy of the GNU Lesser General Public
14 // License along with this library; if not, write to the Free Software
15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 //
17 // See http://www.salome-platform.org/ or
18 // email : webmaster.salome@opencascade.com<mailto:webmaster.salome@opencascade.com>
19 //
20
21 #include "SketchPlugin_Fillet.h"
22
23 #include "SketchPlugin_Arc.h"
24 #include "SketchPlugin_Line.h"
25 #include "SketchPlugin_Point.h"
26 #include "SketchPlugin_Sketch.h"
27 #include "SketchPlugin_ConstraintDistance.h"
28 #include "SketchPlugin_ConstraintEqual.h"
29 #include "SketchPlugin_ConstraintCoincidence.h"
30 #include "SketchPlugin_ConstraintLength.h"
31 #include "SketchPlugin_ConstraintMiddle.h"
32 #include "SketchPlugin_ConstraintTangent.h"
33 #include "SketchPlugin_ConstraintRadius.h"
34 #include "SketchPlugin_Tools.h"
35
36 #include <ModelAPI_AttributeDouble.h>
37 #include <ModelAPI_AttributeInteger.h>
38 #include <ModelAPI_AttributeRefAttr.h>
39 #include <ModelAPI_Data.h>
40 #include <ModelAPI_Events.h>
41 #include <ModelAPI_Session.h>
42 #include <ModelAPI_Tools.h>
43 #include <ModelAPI_Validator.h>
44
45 #include <GeomAlgoAPI_Circ2dBuilder.h>
46 #include <GeomAlgoAPI_EdgeBuilder.h>
47
48 #include <GeomAPI_Circ2d.h>
49 #include <GeomAPI_Dir2d.h>
50 #include <GeomAPI_Lin2d.h>
51 #include <GeomAPI_Pnt2d.h>
52 #include <GeomAPI_XY.h>
53
54 #include <GeomDataAPI_Point2D.h>
55
56 #include <Events_Loop.h>
57
58 #include <math.h>
59
60 const double tolerance = 1.e-7;
61 const double paramTolerance = 1.e-4;
62 const double PI = 3.141592653589793238463;
63
64 /// \brief Attract specified point on theNewArc to the attribute of theFeature
65 static void recalculateAttributes(FeaturePtr theNewArc, const std::string& theNewArcAttribute,
66   FeaturePtr theFeature, const std::string& theFeatureAttribute);
67
68
69 /// \brief Calculate radius of a fillet.
70 ///        It should not be greater than 1/3 of shortest edge length.
71 static double calculateFilletRadius(FeaturePtr theFilletFeatures[2]);
72
73 /// \brief Calculates center of fillet arc and coordinates of tangency points
74 static void calculateFilletCenter(FeaturePtr theFilletFeatures[2],
75                                   double theFilletRadius,
76                                   const std::shared_ptr<GeomAPI_Ax3>& theSketchPlane,
77                                   std::shared_ptr<GeomAPI_XY>& theCenter,
78                                   std::shared_ptr<GeomAPI_XY>& theTangentA,
79                                   std::shared_ptr<GeomAPI_XY>& theTangentB);
80
81 static std::set<FeaturePtr> findFeaturesToRemove(const FeaturePtr theFeature,
82                                                  const AttributePtr theAttribute);
83
84 SketchPlugin_Fillet::SketchPlugin_Fillet()
85 : myFilletCreated(false)
86 {
87 }
88
89 void SketchPlugin_Fillet::initAttributes()
90 {
91   data()->addAttribute(FILLET_POINT_ID(), ModelAPI_AttributeRefAttr::typeId());
92 }
93
94 void SketchPlugin_Fillet::execute()
95 {
96   // Wait all constraints being created, then send update events
97   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
98   bool isUpdateFlushed = Events_Loop::loop()->isFlushed(anUpdateEvent);
99   if (isUpdateFlushed)
100     Events_Loop::loop()->setFlushed(anUpdateEvent, false);
101
102   // set flag here to avoid building Fillet presentation if "Redisplay" event appears
103   myFilletCreated = true;
104
105   // create feature for fillet arc
106   FeaturePtr aFilletArc = createFilletArc();
107
108   // collect features referred to the edges participating in fillet
109   AttributePoint2DPtr aFilletPoints[2];
110   int aFeatInd[2];
111   int anAttrInd[2];
112   std::set<FeaturePtr> aFeaturesToBeRemoved;
113   for (int i = 0; i < 2; ++i) {
114     bool isFirstIndex = (i == 0);
115     aFeatInd[i] = myIsReversed == isFirstIndex ? 1 : 0;
116     anAttrInd[i] = (myIsReversed == isFirstIndex ? 2 : 0) + (myIsNotInversed[aFeatInd[i]] ? 0 : 1);
117     aFilletPoints[i] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
118         myBaseFeatures[aFeatInd[i]]->attribute(myFeatAttributes[anAttrInd[i]]));
119     std::set<FeaturePtr> aRemove =
120         findFeaturesToRemove(myBaseFeatures[aFeatInd[i]], aFilletPoints[i]);
121     aFeaturesToBeRemoved.insert(aRemove.begin(), aRemove.end());
122   }
123
124   // keep "distance" constraints and remove all other references
125   removeReferencesButKeepDistances(aFeaturesToBeRemoved, aFilletPoints);
126
127   // Update fillet edges.
128   recalculateAttributes(aFilletArc, SketchPlugin_Arc::START_ID(),
129                         myBaseFeatures[aFeatInd[0]], myFeatAttributes[anAttrInd[0]]);
130   recalculateAttributes(aFilletArc, SketchPlugin_Arc::END_ID(),
131                         myBaseFeatures[aFeatInd[1]], myFeatAttributes[anAttrInd[1]]);
132
133   FeaturePtr aConstraint;
134
135   // Create coincidence features.
136   aConstraint = SketchPlugin_Tools::createConstraintAttrAttr(sketch(),
137                     SketchPlugin_ConstraintCoincidence::ID(),
138                     aFilletArc->attribute(SketchPlugin_Arc::START_ID()),
139                     myBaseFeatures[aFeatInd[0]]->attribute(myFeatAttributes[anAttrInd[0]]));
140   ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
141   aConstraint = SketchPlugin_Tools::createConstraintAttrAttr(sketch(),
142                     SketchPlugin_ConstraintCoincidence::ID(),
143                     aFilletArc->attribute(SketchPlugin_Arc::END_ID()),
144                     myBaseFeatures[aFeatInd[1]]->attribute(myFeatAttributes[anAttrInd[1]]));
145   ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
146
147   // Create tangent features.
148   for (int i = 0; i < 2; i++) {
149     aConstraint = SketchPlugin_Tools::createConstraintObjectObject(sketch(),
150                       SketchPlugin_ConstraintTangent::ID(),
151                       aFilletArc->lastResult(),
152                       myBaseFeatures[i]->lastResult());
153     aConstraint->execute();
154     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
155   }
156
157   // Send events to update the sub-features by the solver.
158   if (isUpdateFlushed)
159     Events_Loop::loop()->setFlushed(anUpdateEvent, true);
160 }
161
162 AISObjectPtr SketchPlugin_Fillet::getAISObject(AISObjectPtr thePrevious)
163 {
164   if(myFilletCreated) {
165     return AISObjectPtr();
166   }
167
168   SketchPlugin_Sketch* aSketch = sketch();
169   if(!aSketch) {
170     return AISObjectPtr();
171   }
172
173   if (!calculateFilletParameters())
174     return AISObjectPtr();
175
176   // Create arc for presentation.
177   std::shared_ptr<GeomAPI_Pnt> aCenterPnt(aSketch->to3D(myCenterXY->x(), myCenterXY->y()));
178   std::shared_ptr<GeomAPI_Pnt> aTangentPnt1(aSketch->to3D(myTangentXY1->x(),
179                                                           myTangentXY1->y()));
180   std::shared_ptr<GeomAPI_Pnt> aTangentPnt2(aSketch->to3D(myTangentXY2->x(),
181                                                           myTangentXY2->y()));
182   std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
183     aSketch->data()->attribute(SketchPlugin_Sketch::NORM_ID()));
184   std::shared_ptr<GeomAPI_Shape> anArcShape =
185       GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenterPnt, aTangentPnt1, aTangentPnt2, aNDir->dir());
186
187   AISObjectPtr anAISObject = thePrevious;
188   if(!anAISObject.get()) {
189     anAISObject = AISObjectPtr(new GeomAPI_AISObject);
190   }
191   anAISObject->createShape(anArcShape);
192   return anAISObject;
193 }
194
195 bool SketchPlugin_Fillet::calculateFilletParameters()
196 {
197   // Get fillet point.
198   AttributeRefAttrPtr aPointRefAttr = refattr(FILLET_POINT_ID());
199   if (!aPointRefAttr->isInitialized() || aPointRefAttr->isObject())
200     return false;
201   std::shared_ptr<GeomDataAPI_Point2D> aFilletPoint2D =
202     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aPointRefAttr->attr());
203   if (!aFilletPoint2D.get())
204     return false;
205
206   std::set<FeaturePtr> aFilletFeatures =
207       SketchPlugin_Tools::findFeaturesCoincidentToPoint(aFilletPoint2D);
208   if (aFilletFeatures.size() != 2) {
209     setError("Error: Selected point does not have two suitable edges for fillet.");
210     return false;
211   }
212
213   std::set<FeaturePtr>::iterator aFIt = aFilletFeatures.begin();
214   myBaseFeatures[0] = *aFIt;
215   myBaseFeatures[1] = *(++aFIt);
216
217   std::shared_ptr<GeomAPI_Pnt2d> aFilletPnt2d = aFilletPoint2D->pnt();
218   double aRadius = calculateFilletRadius(myBaseFeatures);
219
220   // Calculate arc attributes.
221   static const int aNbFeatures = 2;
222   // First pair of points relate to first feature, second pair -  to second.
223   std::shared_ptr<GeomAPI_Pnt2d> aStartEndPnt[aNbFeatures * 2];
224   for (int i = 0; i < aNbFeatures; i++) {
225     std::string aStartAttr, aEndAttr;
226     if (myBaseFeatures[i]->getKind() == SketchPlugin_Line::ID()) {
227       aStartAttr = SketchPlugin_Line::START_ID();
228       aEndAttr = SketchPlugin_Line::END_ID();
229     } else if (myBaseFeatures[i]->getKind() == SketchPlugin_Arc::ID()) {
230       aStartAttr = SketchPlugin_Arc::START_ID();
231       aEndAttr = SketchPlugin_Arc::END_ID();
232     } else { // Wrong argument.
233       setError("Error: One of the points has wrong coincide feature");
234       return false;
235     }
236     myFeatAttributes[2*i] = aStartAttr;
237     aStartEndPnt[2*i] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
238       myBaseFeatures[i]->attribute(aStartAttr))->pnt();
239     myFeatAttributes[2*i+1] = aEndAttr;
240     aStartEndPnt[2*i+1] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
241       myBaseFeatures[i]->attribute(aEndAttr))->pnt();
242   }
243   for (int aFeatInd = 0; aFeatInd < aNbFeatures; aFeatInd++) {
244     for (int j = 0; j < 2; j++) // loop on start-end of each feature
245       if (aStartEndPnt[aFeatInd * aNbFeatures + j]->distance(aFilletPnt2d) < 1.e-10) {
246         myIsNotInversed[aFeatInd] = (j==0);
247         break;
248       }
249   }
250
251   std::shared_ptr<GeomAPI_Ax3> aSketchPlane = SketchPlugin_Sketch::plane(sketch());
252   calculateFilletCenter(myBaseFeatures, aRadius, aSketchPlane,
253                         myCenterXY, myTangentXY1, myTangentXY2);
254
255   // Tangent directions of the features in coincident point.
256   std::shared_ptr<GeomAPI_Dir2d> aTangentDir[aNbFeatures];
257   for (int i = 0; i < aNbFeatures; i++) {
258     std::shared_ptr<GeomAPI_XY> aDir;
259     if (myBaseFeatures[i]->getKind() == SketchPlugin_Line::ID()) {
260       aDir = aStartEndPnt[2*i+1]->xy()->decreased(aStartEndPnt[2*i]->xy());
261       if (!myIsNotInversed[i])
262         aDir = aDir->multiplied(-1.0);
263     } else if (myBaseFeatures[i]->getKind() == SketchPlugin_Arc::ID()) {
264       std::shared_ptr<GeomAPI_Pnt2d> aCenterPoint =
265         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
266         myBaseFeatures[i]->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt();
267       aDir = myIsNotInversed[i] ? aStartEndPnt[2*i]->xy() : aStartEndPnt[2*i+1]->xy();
268       aDir = aDir->decreased(aCenterPoint->xy());
269
270       double x = aDir->x();
271       double y = aDir->y();
272       aDir->setX(-y);
273       aDir->setY(x);
274       if (myIsNotInversed[i] ==
275           std::dynamic_pointer_cast<SketchPlugin_Arc>(myBaseFeatures[i])->isReversed())
276         aDir = aDir->multiplied(-1.0);
277     }
278     aTangentDir[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(aDir));
279   }
280
281   // By default, the start point of fillet arc is connected to FeatureA,
282   // and the end point - to FeatureB. But when the angle between TangentDirA and
283   // TangentDirB greater 180 degree, the sequaence of features need to be reversed.
284   double cosBA = aTangentDir[0]->cross(aTangentDir[1]); // cos(B-A),
285   // where A and B - angles between corresponding tanget direction and the X axis
286   myIsReversed = cosBA > 0.0;
287
288   if(myIsReversed) {
289     std::shared_ptr<GeomAPI_XY> aTmp = myTangentXY1;
290     myTangentXY1 = myTangentXY2;
291     myTangentXY2 = aTmp;
292   }
293   return true;
294 }
295
296 FeaturePtr SketchPlugin_Fillet::createFilletArc()
297 {
298   // Calculate Fillet parameters if does not yet
299   if (!myBaseFeatures[0] || !myBaseFeatures[1])
300     calculateFilletParameters();
301
302   // Create arc feature.
303   FeaturePtr aFilletArc = sketch()->addFeature(SketchPlugin_Arc::ID());
304
305   // Set arc attributes.
306   bool aWasBlocked = aFilletArc->data()->blockSendAttributeUpdated(true);
307   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
308       aFilletArc->attribute(SketchPlugin_Arc::CENTER_ID()))->setValue(myCenterXY->x(),
309                                                                       myCenterXY->y());
310   std::shared_ptr<GeomDataAPI_Point2D> aStartPoint =
311       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
312           aFilletArc->attribute(SketchPlugin_Arc::START_ID()));
313   std::shared_ptr<GeomDataAPI_Point2D> aEndPoint =
314       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
315           aFilletArc->attribute(SketchPlugin_Arc::END_ID()));
316   if(aStartPoint->isInitialized() && aEndPoint->isInitialized()
317       && (aStartPoint->pnt()->xy()->distance(myTangentXY1) > tolerance
318       || aEndPoint->pnt()->xy()->distance(myTangentXY2) > tolerance)) {
319     std::dynamic_pointer_cast<SketchPlugin_Arc>(aFilletArc)->setReversed(false);
320   }
321   aStartPoint->setValue(myTangentXY1->x(), myTangentXY1->y());
322   aEndPoint->setValue(myTangentXY2->x(), myTangentXY2->y());
323   aFilletArc->data()->blockSendAttributeUpdated(aWasBlocked);
324   aFilletArc->execute();
325
326   return aFilletArc;
327 }
328
329 FeaturePtr SketchPlugin_Fillet::createFilletApex(const GeomPnt2dPtr& theCoordinates)
330 {
331   FeaturePtr anApex = sketch()->addFeature(SketchPlugin_Point::ID());
332   AttributePoint2DPtr aCoord = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
333       anApex->attribute(SketchPlugin_Point::COORD_ID()));
334   aCoord->setValue(theCoordinates);
335
336   // additional coincidence constraints
337   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
338   FeaturePtr aConstraint;
339   for (int i = 0; i < 2; i++) {
340     aConstraint = SketchPlugin_Tools::createConstraintAttrObject(sketch(),
341                       SketchPlugin_ConstraintCoincidence::ID(),
342                       aCoord,
343                       myBaseFeatures[i]->lastResult());
344     aConstraint->execute();
345     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
346   }
347
348   return anApex;
349 }
350
351 struct Length {
352   AttributePtr myPoints[2];
353   std::string myValueText;
354   double myValueDouble;
355   GeomPnt2dPtr myFlyoutPoint;
356   int myLocationType;
357 };
358
359 void SketchPlugin_Fillet::removeReferencesButKeepDistances(
360     std::set<FeaturePtr>& theFeaturesToRemove,
361     const AttributePoint2DPtr theFilletPoints[2])
362 {
363   FeaturePtr aFilletApex;
364   std::list<Length> aLengthToDistance;
365
366   std::set<FeaturePtr>::iterator aFeat = theFeaturesToRemove.begin();
367   while (aFeat != theFeaturesToRemove.end()) {
368     std::shared_ptr<SketchPlugin_ConstraintDistance> aDistance =
369         std::dynamic_pointer_cast<SketchPlugin_ConstraintDistance>(*aFeat);
370     if (aDistance) {
371       if (!aFilletApex)
372         aFilletApex = createFilletApex(theFilletPoints[0]->pnt());
373       // update attributes of distance constraints
374       bool isUpdated = false;
375       for (int attrInd = 0; attrInd < CONSTRAINT_ATTR_SIZE && !isUpdated; ++attrInd) {
376         AttributeRefAttrPtr aRefAttr =
377             aDistance->refattr(SketchPlugin_Constraint::ATTRIBUTE(attrInd));
378         if (aRefAttr && !aRefAttr->isObject() &&
379            (aRefAttr->attr() == theFilletPoints[0] || aRefAttr->attr() == theFilletPoints[1])) {
380           aRefAttr->setAttr(aFilletApex->attribute(SketchPlugin_Point::COORD_ID()));
381           isUpdated = true;
382         }
383       }
384       // avoid distance from removing if it is updated
385       std::set<FeaturePtr>::iterator aKeepIt = aFeat++;
386       if (isUpdated)
387         theFeaturesToRemove.erase(aKeepIt);
388
389     } else {
390       std::shared_ptr<SketchPlugin_ConstraintLength> aLength =
391           std::dynamic_pointer_cast<SketchPlugin_ConstraintLength>(*aFeat);
392       if (aLength) {
393         if (!aFilletApex)
394           aFilletApex = createFilletApex(theFilletPoints[0]->pnt());
395         // remove Length, but create new distance constraint
396         AttributeRefAttrPtr aRefAttr =
397           aLength->refattr(SketchPlugin_Constraint::ENTITY_A());
398         FeaturePtr aLine = ModelAPI_Feature::feature(aRefAttr->object());
399         if (aLine) {
400           aLengthToDistance.push_back(Length());
401           Length& aNewLength = aLengthToDistance.back();
402           // main attrbutes
403           for (int i = 0; i < 2; ++i) {
404             AttributePtr anAttr = aLine->attribute(
405                 i == 0 ? SketchPlugin_Line::START_ID() : SketchPlugin_Line::END_ID());
406             if (anAttr == theFilletPoints[0] || anAttr == theFilletPoints[1])
407               aNewLength.myPoints[i] = aFilletApex->attribute(SketchPlugin_Point::COORD_ID());
408             else
409               aNewLength.myPoints[i] = anAttr;
410           }
411           // value
412           AttributeDoublePtr aValue = aLength->real(SketchPlugin_Constraint::VALUE());
413           aNewLength.myValueDouble = aValue->value();
414           aNewLength.myValueText = aValue->text();
415           // auxiliary attributes
416           AttributePoint2DPtr aFlyoutAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
417               aLength->attribute(SketchPlugin_ConstraintLength::FLYOUT_VALUE_PNT()));
418           if (aFlyoutAttr && aFlyoutAttr->isInitialized())
419             aNewLength.myFlyoutPoint = aFlyoutAttr->pnt();
420           AttributeIntegerPtr aLocationAttr =
421               aLength->integer(SketchPlugin_ConstraintLength::LOCATION_TYPE_ID());
422           if (aLocationAttr && aLocationAttr->isInitialized())
423             aNewLength.myLocationType = aLocationAttr->value();
424           else
425             aNewLength.myLocationType = -1;
426         }
427       }
428
429       ++aFeat;
430     }
431   }
432
433   // remove references
434   ModelAPI_Tools::removeFeaturesAndReferences(theFeaturesToRemove);
435   Events_Loop::loop()->flush(Events_Loop::eventByName(EVENT_OBJECT_DELETED));
436
437   // restore Length constraints as point-point distances
438   FeaturePtr aConstraint;
439   std::list<Length>::iterator anIt = aLengthToDistance.begin();
440   for (; anIt != aLengthToDistance.end(); ++anIt) {
441     aConstraint = SketchPlugin_Tools::createConstraintAttrAttr(sketch(),
442         SketchPlugin_ConstraintDistance::ID(), anIt->myPoints[0], anIt->myPoints[1]);
443     // set value
444     AttributeDoublePtr aValue = aConstraint->real(SketchPlugin_Constraint::VALUE());
445     if (anIt->myValueText.empty())
446       aValue->setValue(anIt->myValueDouble);
447     else
448       aValue->setText(anIt->myValueText);
449     // set flyout point if exists
450     if (anIt->myFlyoutPoint) {
451       AttributePoint2DPtr aFlyoutAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
452           aConstraint->attribute(SketchPlugin_ConstraintDistance::FLYOUT_VALUE_PNT()));
453       aFlyoutAttr->setValue(anIt->myFlyoutPoint);
454     }
455     // set location type if initialized
456     if (anIt->myLocationType >= 0) {
457       AttributeIntegerPtr aLocationType =
458           aConstraint->integer(SketchPlugin_ConstraintDistance::LOCATION_TYPE_ID());
459       aLocationType->setValue(anIt->myLocationType);
460     }
461     aConstraint->execute();
462     ModelAPI_EventCreator::get()->sendUpdated(aConstraint,
463         Events_Loop::eventByName(EVENT_OBJECT_UPDATED));
464   }
465 }
466
467 // =========   Auxiliary functions   =================
468 void recalculateAttributes(FeaturePtr theNewArc,  const std::string& theNewArcAttribute,
469                            FeaturePtr theFeature, const std::string& theFeatureAttribute)
470 {
471   std::shared_ptr<GeomAPI_Pnt2d> anArcPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
472       theNewArc->attribute(theNewArcAttribute))->pnt();
473   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
474       theFeature->attribute(theFeatureAttribute))->setValue(anArcPoint->x(), anArcPoint->y());
475 }
476
477 static std::shared_ptr<GeomAPI_Pnt2d> toPoint(const AttributePtr& theAttribute)
478 {
479   std::shared_ptr<GeomAPI_Pnt2d> aPoint;
480   AttributePoint2DPtr aPointAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(theAttribute);
481   if (aPointAttr)
482     aPoint = aPointAttr->pnt();
483   return aPoint;
484 }
485
486 static std::shared_ptr<GeomAPI_Lin2d> toLine(const FeaturePtr& theFeature)
487 {
488   std::shared_ptr<GeomAPI_Lin2d> aLine;
489   if (theFeature->getKind() == SketchPlugin_Line::ID()) {
490     std::shared_ptr<GeomAPI_Pnt2d> aStart =
491         toPoint( theFeature->attribute(SketchPlugin_Line::START_ID()) );
492     std::shared_ptr<GeomAPI_Pnt2d> aEnd =
493         toPoint( theFeature->attribute(SketchPlugin_Line::END_ID()) );
494     aLine = std::shared_ptr<GeomAPI_Lin2d>(new GeomAPI_Lin2d(aStart, aEnd));
495   }
496   return aLine;
497 }
498
499 static std::shared_ptr<GeomAPI_Circ2d> toCircle(const FeaturePtr& theFeature)
500 {
501   std::shared_ptr<GeomAPI_Circ2d> aCircle;
502   if (theFeature->getKind() == SketchPlugin_Arc::ID()) {
503     std::shared_ptr<GeomAPI_Pnt2d> aCenter =
504         toPoint( theFeature->attribute(SketchPlugin_Arc::CENTER_ID()) );
505     std::shared_ptr<GeomAPI_Pnt2d> aStart =
506         toPoint( theFeature->attribute(SketchPlugin_Arc::START_ID()) );
507     aCircle = std::shared_ptr<GeomAPI_Circ2d>(new GeomAPI_Circ2d(aCenter, aStart));
508   }
509   return aCircle;
510 }
511
512
513 void calculateFilletCenter(FeaturePtr theFilletFeatures[2],
514                            double theFilletRadius,
515                            const std::shared_ptr<GeomAPI_Ax3>& theSketchPlane,
516                            std::shared_ptr<GeomAPI_XY>& theCenter,
517                            std::shared_ptr<GeomAPI_XY>& theTangentA,
518                            std::shared_ptr<GeomAPI_XY>& theTangentB)
519 {
520   GeomShapePtr aShapeA = theFilletFeatures[0]->lastResult()->shape();
521   GeomShapePtr aShapeB = theFilletFeatures[1]->lastResult()->shape();
522
523   GeomAlgoAPI_Circ2dBuilder aCircBuilder(theSketchPlane);
524   aCircBuilder.addTangentCurve(aShapeA);
525   aCircBuilder.addTangentCurve(aShapeB);
526   aCircBuilder.setRadius(theFilletRadius);
527
528   std::shared_ptr<GeomAPI_Circ2d> aFilletCircle = aCircBuilder.circle();
529   if (!aFilletCircle)
530     return;
531
532   theCenter = aFilletCircle->center()->xy();
533   // tangent points
534   std::shared_ptr<GeomAPI_Pnt2d> aTgPoints[2];
535   for (int i = 0; i < 2; ++i) {
536     std::shared_ptr<GeomAPI_Circ2d> aCircle = toCircle(theFilletFeatures[i]);
537     if (aCircle)
538       aTgPoints[i] = aCircle->project(aFilletCircle->center());
539     else {
540       std::shared_ptr<GeomAPI_Lin2d> aLine = toLine(theFilletFeatures[i]);
541       if (aLine)
542         aTgPoints[i] = aLine->project(aFilletCircle->center());
543     }
544   }
545   theTangentA = aTgPoints[0]->xy();
546   theTangentB = aTgPoints[1]->xy();
547 }
548
549 double calculateFilletRadius(FeaturePtr theFilletFeatures[2])
550 {
551   double aLengths[2] = { 0, 0 };
552   for (int i = 0; i < 2; ++i) {
553     GeomShapePtr aShape = theFilletFeatures[i]->lastResult()->shape();
554     std::shared_ptr<GeomAPI_Edge> anEdge = std::dynamic_pointer_cast<GeomAPI_Edge>(aShape);
555     if (anEdge)
556       aLengths[i] = anEdge->length();
557   }
558   return std::min(aLengths[0], aLengths[1]) / 6.0;
559 }
560
561 std::set<FeaturePtr> findFeaturesToRemove(const FeaturePtr theFeature,
562                                           const AttributePtr theAttribute) {
563   std::set<FeaturePtr> aFeaturesToBeRemoved;
564   std::set<AttributePtr> aRefs = theFeature->data()->refsToMe();
565   std::list<ResultPtr> aResults = theFeature->results();
566   for(std::list<ResultPtr>::const_iterator aResultsIt = aResults.cbegin();
567       aResultsIt != aResults.cend();
568       ++aResultsIt) {
569     ResultPtr aResult = *aResultsIt;
570     std::set<AttributePtr> aResultRefs = aResult->data()->refsToMe();
571     aRefs.insert(aResultRefs.begin(), aResultRefs.end());
572   }
573   for(std::set<AttributePtr>::const_iterator anIt = aRefs.cbegin();
574     anIt != aRefs.cend();
575     ++anIt) {
576     std::shared_ptr<ModelAPI_Attribute> anAttr = (*anIt);
577     FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(anAttr->owner());
578     if(aFeature->getKind() == SketchPlugin_Fillet::ID()) {
579       continue;
580     }
581     if(aFeature->getKind() == SketchPlugin_ConstraintLength::ID()
582         || aFeature->getKind() == SketchPlugin_ConstraintEqual::ID()
583         || aFeature->getKind() == SketchPlugin_ConstraintMiddle::ID()) {
584       aFeaturesToBeRemoved.insert(aFeature);
585     } else {
586       std::list<AttributePtr> anAttrs =
587           aFeature->data()->attributes(ModelAPI_AttributeRefAttr::typeId());
588       for(std::list<AttributePtr>::const_iterator aRefAttrsIt = anAttrs.cbegin();
589           aRefAttrsIt != anAttrs.cend();
590           ++aRefAttrsIt) {
591         AttributeRefAttrPtr anAttrRefAttr =
592           std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(*aRefAttrsIt);
593         if(anAttrRefAttr.get() && anAttrRefAttr->attr() == theAttribute) {
594           aFeaturesToBeRemoved.insert(aFeature);
595         }
596       }
597     }
598   }
599   return aFeaturesToBeRemoved;
600 }