src/SketchSolver/SketchSolver_ConstraintCoincidence.cpp

   1 // Copyright (C) 2014-2019  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 email : webmaster.salome@opencascade.com
  18 //
  19
  20 #include <SketchSolver_ConstraintCoincidence.h>
  21 #include <SketchSolver_Error.h>
  22 #include <PlaneGCSSolver_Tools.h>
  23 #include <PlaneGCSSolver_UpdateCoincidence.h>
  24
  25 #include <SketchPlugin_Arc.h>
  26 #include <SketchPlugin_Line.h>
  27
  28 static void getCoincidentFeatureExtremities(const ConstraintPtr& theConstraint,
  29                                             const StoragePtr& theStorage,
  30                                             EntityWrapperPtr theExtremities[2])
  31 {
  32   for (int i = 0; i < CONSTRAINT_ATTR_SIZE; ++i) {
  33     AttributeRefAttrPtr aRefAttr = theConstraint->refattr(SketchPlugin_Constraint::ATTRIBUTE(i));
  34     if (!aRefAttr || !aRefAttr->isObject())
  35       continue;
  36
  37     FeaturePtr aFeature = ModelAPI_Feature::feature(aRefAttr->object());
  38     if (!aFeature)
  39       continue;
  40
  41     if (aFeature->getKind() == SketchPlugin_Line::ID()) {
  42       theExtremities[0] = theStorage->entity(aFeature->attribute(SketchPlugin_Line::START_ID()));
  43       theExtremities[1] = theStorage->entity(aFeature->attribute(SketchPlugin_Line::END_ID()));
  44     } else if (aFeature->getKind() == SketchPlugin_Arc::ID()) {
  45       theExtremities[0] = theStorage->entity(aFeature->attribute(SketchPlugin_Arc::START_ID()));
  46       theExtremities[1] = theStorage->entity(aFeature->attribute(SketchPlugin_Arc::END_ID()));
  47     }
  48   }
  49 }
  50
  51
  52 void SketchSolver_ConstraintCoincidence::process()
  53 {
  54   cleanErrorMsg();
  55   if (!myBaseConstraint || !myStorage) {
  56     // Not enough parameters are assigned
  57     return;
  58   }
  59
  60   EntityWrapperPtr aValue;
  61   std::vector<EntityWrapperPtr> anAttributes;
  62   getAttributes(aValue, anAttributes);
  63   if (!myErrorMsg.empty())
  64     return;
  65   if (anAttributes.empty()) {
  66     myErrorMsg = SketchSolver_Error::INCORRECT_ATTRIBUTE();
  67     return;
  68   }
  69
  70   mySolverConstraint = PlaneGCSSolver_Tools::createConstraint(
  71       myBaseConstraint, getType(),
  72       aValue, anAttributes[0], anAttributes[1], anAttributes[2], anAttributes[3]);
  73
  74   myStorage->subscribeUpdates(this, PlaneGCSSolver_UpdateCoincidence::GROUP());
  75   myStorage->notify(myBaseConstraint);
  76 }
  77
  78 bool SketchSolver_ConstraintCoincidence::remove()
  79 {
  80   myInSolver = false;
  81   myFeatureExtremities[0] = EntityWrapperPtr();
  82   myFeatureExtremities[1] = EntityWrapperPtr();
  83   return SketchSolver_Constraint::remove();
  84 }
  85
  86 void SketchSolver_ConstraintCoincidence::getAttributes(
  87     EntityWrapperPtr& theValue,
  88     std::vector<EntityWrapperPtr>& theAttributes)
  89 {
  90   SketchSolver_Constraint::getAttributes(theValue, theAttributes);
  91   if (!myErrorMsg.empty() || !theAttributes[0]) {
  92     theAttributes.clear();
  93     return;
  94   }
  95
  96   if (theAttributes[1])
  97     myType = CONSTRAINT_PT_PT_COINCIDENT;
  98   else if (theAttributes[2]) {
  99     // check the type of entity (line or circle)
 100     SketchSolver_EntityType anEntType = theAttributes[2]->type();
 101     if (anEntType == ENTITY_LINE)
 102       myType = CONSTRAINT_PT_ON_LINE;
 103     else if (anEntType == ENTITY_CIRCLE || anEntType == ENTITY_ARC)
 104       myType = CONSTRAINT_PT_ON_CIRCLE;
 105     else
 106       myErrorMsg = SketchSolver_Error::INCORRECT_ATTRIBUTE();
 107
 108     // obtain extremity points of the coincident feature for further checking of multi-coincidence
 109     getCoincidentFeatureExtremities(myBaseConstraint, myStorage, myFeatureExtremities);
 110   } else
 111     myErrorMsg = SketchSolver_Error::INCORRECT_ATTRIBUTE();
 112 }
 113
 114 void SketchSolver_ConstraintCoincidence::notify(const FeaturePtr&      theFeature,
 115                                                 PlaneGCSSolver_Update* theUpdater)
 116 {
 117   PlaneGCSSolver_UpdateCoincidence* anUpdater =
 118       static_cast<PlaneGCSSolver_UpdateCoincidence*>(theUpdater);
 119   bool isAccepted = anUpdater->addCoincidence(myAttributes.front(), myAttributes.back());
 120
 121   // additionally check the point is coincident to extremity of coincident feature
 122   if (myFeatureExtremities[0] && myFeatureExtremities[1]) {
 123     EntityWrapperPtr aPoint =
 124         myAttributes.front()->type() == ENTITY_POINT ? myAttributes.front() : myAttributes.back();
 125
 126     for (int i = 0; i < 2; ++i)
 127       isAccepted = isAccepted && !anUpdater->isPointOnEntity(aPoint, myFeatureExtremities[i]);
 128   }
 129
 130   if (isAccepted) {
 131     if (!myInSolver) {
 132       myInSolver = true;
 133       myStorage->addConstraint(myBaseConstraint, mySolverConstraint);
 134     }
 135   } else {
 136     if (myInSolver) {
 137       myInSolver = false;
 138       myStorage->removeConstraint(myBaseConstraint);
 139     }
 140   }
 141 }