src/SketchSolver/SketchSolver_ConstraintDistance.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 <SketchSolver_ConstraintDistance.h>
  22 #include <SketchSolver_Error.h>
  23 #include <SketchSolver_Manager.h>
  24
  25 #include <PlaneGCSSolver_EdgeWrapper.h>
  26 #include <PlaneGCSSolver_PointWrapper.h>
  27 #include <PlaneGCSSolver_Storage.h>
  28 #include <PlaneGCSSolver_Tools.h>
  29
  30 #include <SketchPlugin_ConstraintDistanceHorizontal.h>
  31 #include <SketchPlugin_ConstraintDistanceVertical.h>
  32
  33 #include <GeomAPI_Dir2d.h>
  34 #include <GeomAPI_Lin2d.h>
  35 #include <GeomAPI_Pnt2d.h>
  36 #include <GeomAPI_XY.h>
  37
  38 #include <math.h>
  39
  40
  41 void SketchSolver_ConstraintDistance::getAttributes(
  42     EntityWrapperPtr& theValue,
  43     std::vector<EntityWrapperPtr>& theAttributes)
  44 {
  45   SketchSolver_Constraint::getAttributes(theValue, theAttributes);
  46   if (!myErrorMsg.empty() || !theAttributes[0]) {
  47     theAttributes.clear();
  48     return;
  49   }
  50
  51   if (theAttributes[1]) {
  52     if (myBaseConstraint->getKind() == SketchPlugin_ConstraintDistanceHorizontal::ID())
  53       myType = CONSTRAINT_HORIZONTAL_DISTANCE;
  54     else if (myBaseConstraint->getKind() == SketchPlugin_ConstraintDistanceVertical::ID())
  55       myType = CONSTRAINT_VERTICAL_DISTANCE;
  56     else
  57       myType = CONSTRAINT_PT_PT_DISTANCE;
  58   } else if (theAttributes[2] && theAttributes[2]->type() == ENTITY_LINE)
  59     myType = CONSTRAINT_PT_LINE_DISTANCE;
  60   else
  61     theAttributes.clear();
  62
  63   myPrevValue = 0.0;
  64 }
  65
  66 void SketchSolver_ConstraintDistance::adjustConstraint()
  67 {
  68   if (getType() == CONSTRAINT_PT_LINE_DISTANCE) {
  69     bool isSigned = myBaseConstraint->boolean(SketchPlugin_ConstraintDistance::SIGNED())->value();
  70     if (myIsSigned == isSigned)
  71       return; // distance type is not changed => nothing to adjust
  72
  73     // Adjust point-line distance by setting/removing additional constraints
  74     if (isSigned)
  75       addConstraintsToKeepSign();
  76     else
  77       removeConstraintsKeepingSign();
  78     myIsSigned = isSigned;
  79   }
  80 }
  81
  82 void SketchSolver_ConstraintDistance::update()
  83 {
  84   ConstraintWrapperPtr aConstraint = myStorage->constraint(myBaseConstraint);
  85   myPrevValue = aConstraint->value();
  86
  87   SketchSolver_Constraint::update();
  88 }
  89
  90 void SketchSolver_ConstraintDistance::addConstraintsToKeepSign()
  91 {
  92   std::shared_ptr<PlaneGCSSolver_Storage> aStorage =
  93       std::dynamic_pointer_cast<PlaneGCSSolver_Storage>(myStorage);
  94
  95   ConstraintWrapperPtr aConstraint = aStorage->constraint(myBaseConstraint);
  96   std::list<GCSConstraintPtr> aGCSConstraints = aConstraint->constraints();
  97
  98   // calculate projection of the point on the line and find a sign of a distance
  99   EntityWrapperPtr aDistPoint, aDistLine;
 100   for (int i = 0; i < 2; ++i) {
 101     AttributePtr anAttr = myBaseConstraint->attribute(SketchPlugin_Constraint::ATTRIBUTE(i));
 102     EntityWrapperPtr anEntity = myStorage->entity(anAttr);
 103     if (anEntity->type() == ENTITY_POINT)
 104       aDistPoint = anEntity;
 105     else if (anEntity->type() == ENTITY_LINE)
 106       aDistLine = anEntity;
 107   }
 108   std::shared_ptr<GeomAPI_Lin2d> aLine = PlaneGCSSolver_Tools::line(aDistLine);
 109   std::shared_ptr<GeomAPI_Pnt2d> aPoint = PlaneGCSSolver_Tools::point(aDistPoint);
 110
 111   std::shared_ptr<GeomAPI_XY> aLineVec = aLine->direction()->xy();
 112   std::shared_ptr<GeomAPI_XY> aPtLineVec = aPoint->xy()->decreased(aLine->location()->xy());
 113   if (aLineVec->cross(aPtLineVec) >= 0.)
 114     mySignValue = PI/2.0;
 115   else
 116     mySignValue = - PI/2.0;
 117   double aDot = aPtLineVec->dot(aLineVec);
 118   std::shared_ptr<GeomAPI_XY> aProjectedPnt =
 119       aLine->location()->xy()->added(aLineVec->multiplied(aDot));
 120
 121   // create auxiliary point on the line and set auxiliary constraints
 122   myOddPoint = GCSPointPtr(new GCS::Point);
 123   myOddPoint->x = aStorage->createParameter();
 124   myOddPoint->y = aStorage->createParameter();
 125   *(myOddPoint->x) = aProjectedPnt->x();
 126   *(myOddPoint->y) = aProjectedPnt->y();
 127
 128   PointWrapperPtr aPointWr = std::dynamic_pointer_cast<PlaneGCSSolver_PointWrapper>(aDistPoint);
 129   EdgeWrapperPtr anEdgeWr = std::dynamic_pointer_cast<PlaneGCSSolver_EdgeWrapper>(aDistLine);
 130   std::shared_ptr<GCS::Line> aGCSLine = std::dynamic_pointer_cast<GCS::Line>(anEdgeWr->entity());
 131   // point-on-line
 132   GCSConstraintPtr aNewConstraint(new GCS::ConstraintPointOnLine(*myOddPoint, *aGCSLine));
 133   aGCSConstraints.push_back(aNewConstraint);
 134   // angle which keep orientation
 135   aNewConstraint = GCSConstraintPtr(new GCS::ConstraintL2LAngle(
 136       aGCSLine->p1, aGCSLine->p2, *myOddPoint, *(aPointWr->point()), &mySignValue));
 137   aGCSConstraints.push_back(aNewConstraint);
 138
 139   aConstraint->setConstraints(aGCSConstraints);
 140
 141   aStorage->removeConstraint(myBaseConstraint);
 142   aStorage->addConstraint(myBaseConstraint, aConstraint);
 143 }
 144
 145 void SketchSolver_ConstraintDistance::removeConstraintsKeepingSign()
 146 {
 147   std::shared_ptr<PlaneGCSSolver_Storage> aStorage =
 148       std::dynamic_pointer_cast<PlaneGCSSolver_Storage>(myStorage);
 149
 150   ConstraintWrapperPtr aConstraint = aStorage->constraint(myBaseConstraint);
 151   std::list<GCSConstraintPtr> aGCSConstraints = aConstraint->constraints();
 152
 153   aStorage->removeConstraint(myBaseConstraint);
 154
 155   // remove parameters related to auxiliary point
 156   GCS::SET_pD aParams;
 157   aParams.insert(myOddPoint->x);
 158   aParams.insert(myOddPoint->y);
 159   aStorage->removeParameters(aParams);
 160
 161   aGCSConstraints.pop_back();
 162   aGCSConstraints.pop_back();
 163   aConstraint->setConstraints(aGCSConstraints);
 164   aStorage->addConstraint(myBaseConstraint, aConstraint);
 165 }