src/SketchPlugin/SketchPlugin_Ellipse.cpp

   1 // Copyright (C) 2017-2023  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 <SketchPlugin_Ellipse.h>
  21 #include <SketchPlugin_Sketch.h>
  22
  23 #include <GeomAlgoAPI_EdgeBuilder.h>
  24
  25 #include <GeomAPI_Dir2d.h>
  26 #include <GeomAPI_Edge.h>
  27 #include <GeomAPI_Ellipse.h>
  28 #include <GeomAPI_Pnt2d.h>
  29
  30 #include <GeomDataAPI_Point2D.h>
  31
  32 #include <ModelAPI_AttributeDouble.h>
  33 #include <ModelAPI_ResultConstruction.h>
  34 #include <ModelAPI_Session.h>
  35 #include <ModelAPI_Validator.h>
  36
  37 #include <cmath>
  38
  39 static const double tolerance = 1e-7;
  40
  41
  42 SketchPlugin_Ellipse::SketchPlugin_Ellipse()
  43 : SketchPlugin_SketchEntity()
  44 {
  45 }
  46
  47 void SketchPlugin_Ellipse::initDerivedClassAttributes()
  48 {
  49   data()->addAttribute(CENTER_ID(), GeomDataAPI_Point2D::typeId());
  50   data()->addAttribute(FIRST_FOCUS_ID(), GeomDataAPI_Point2D::typeId());
  51   data()->addAttribute(SECOND_FOCUS_ID(), GeomDataAPI_Point2D::typeId());
  52   data()->addAttribute(MAJOR_AXIS_START_ID(), GeomDataAPI_Point2D::typeId());
  53   data()->addAttribute(MAJOR_AXIS_END_ID(), GeomDataAPI_Point2D::typeId());
  54   data()->addAttribute(MINOR_AXIS_START_ID(), GeomDataAPI_Point2D::typeId());
  55   data()->addAttribute(MINOR_AXIS_END_ID(), GeomDataAPI_Point2D::typeId());
  56   data()->addAttribute(MAJOR_RADIUS_ID(), ModelAPI_AttributeDouble::typeId());
  57   data()->addAttribute(MINOR_RADIUS_ID(), ModelAPI_AttributeDouble::typeId());
  58
  59   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), SECOND_FOCUS_ID());
  60   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), MAJOR_AXIS_START_ID());
  61   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), MAJOR_AXIS_END_ID());
  62   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), MINOR_AXIS_START_ID());
  63   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), MINOR_AXIS_END_ID());
  64   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), MAJOR_RADIUS_ID());
  65
  66   data()->addAttribute(EXTERNAL_ID(), ModelAPI_AttributeSelection::typeId());
  67   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), EXTERNAL_ID());
  68 }
  69
  70 void SketchPlugin_Ellipse::execute()
  71 {
  72   SketchPlugin_Sketch* aSketch = sketch();
  73   if(!aSketch) {
  74     return;
  75   }
  76
  77   // Calculate all characteristics of the ellipse.
  78   fillCharacteristicPoints();
  79
  80   // Make a visible ellipse.
  81   createEllipse(aSketch, 0);
  82 }
  83
  84 bool SketchPlugin_Ellipse::isFixed() {
  85   return data()->selection(EXTERNAL_ID())->context().get() != NULL;
  86 }
  87
  88 void SketchPlugin_Ellipse::attributeChanged(const std::string& theID) {
  89   // the second condition for unability to move external segments anywhere
  90   if (theID == EXTERNAL_ID() || isFixed()) {
  91     std::shared_ptr<GeomAPI_Shape> aSelection = data()->selection(EXTERNAL_ID())->value();
  92     if (!aSelection) {
  93       // empty shape in selection shows that the shape is equal to context
  94       ResultPtr anExtRes = selection(EXTERNAL_ID())->context();
  95       if (anExtRes)
  96         aSelection = anExtRes->shape();
  97     }
  98     // update arguments due to the selection value
  99     if (aSelection && !aSelection->isNull() && aSelection->isEdge()) {
 100       std::shared_ptr<GeomAPI_Edge> anEdge( new GeomAPI_Edge(aSelection));
 101       std::shared_ptr<GeomAPI_Ellipse> anEllipse = anEdge->ellipse();
 102
 103       std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 104           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(CENTER_ID()));
 105       aCenterAttr->setValue(sketch()->to2D(anEllipse->center()));
 106
 107       std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 108           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(FIRST_FOCUS_ID()));
 109       aFocusAttr->setValue(sketch()->to2D(anEllipse->firstFocus()));
 110
 111       real(MAJOR_RADIUS_ID())->setValue(anEllipse->majorRadius());
 112       real(MINOR_RADIUS_ID())->setValue(anEllipse->minorRadius());
 113     }
 114   }
 115 }
 116
 117 bool SketchPlugin_Ellipse::fillCharacteristicPoints()
 118 {
 119   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 120       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 121   std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 122       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(FIRST_FOCUS_ID()));
 123
 124   AttributeDoublePtr aMinorRadiusAttr = real(MINOR_RADIUS_ID());
 125
 126   if (!aCenterAttr->isInitialized() ||
 127       !aFocusAttr->isInitialized() ||
 128       !aMinorRadiusAttr->isInitialized()) {
 129     return false;
 130   }
 131
 132   double aMinorRadius = aMinorRadiusAttr->value();
 133   if (aMinorRadius < tolerance) {
 134     return false;
 135   }
 136
 137   bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 138   GeomPnt2dPtr aCenter2d = aCenterAttr->pnt();
 139   GeomPnt2dPtr aFocus2d = aFocusAttr->pnt();
 140   GeomDir2dPtr aMajorDir2d(new GeomAPI_Dir2d(aFocus2d->x() - aCenter2d->x(),
 141     aFocus2d->y() - aCenter2d->y()));
 142   GeomDir2dPtr aMinorDir2d(new GeomAPI_Dir2d(-aMajorDir2d->y(), aMajorDir2d->x()));
 143
 144   AttributeDoublePtr aMajorRadiusAttr = real(MAJOR_RADIUS_ID());
 145   double aFocalDist = aCenter2d->distance(aFocus2d);
 146   double aMajorRadius = sqrt(aFocalDist * aFocalDist + aMinorRadius * aMinorRadius);
 147   if (!aMajorRadiusAttr->isInitialized() ||
 148       fabs(aMajorRadiusAttr->value() - aMajorRadius) > tolerance)
 149     aMajorRadiusAttr->setValue(aMajorRadius);
 150
 151   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(SECOND_FOCUS_ID()))
 152     ->setValue(2.0 * aCenter2d->x() - aFocus2d->x(), 2.0 * aCenter2d->y() - aFocus2d->y());
 153   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MAJOR_AXIS_START_ID()))
 154       ->setValue(aCenter2d->x() - aMajorDir2d->x() * aMajorRadius,
 155                  aCenter2d->y() - aMajorDir2d->y() * aMajorRadius);
 156   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MAJOR_AXIS_END_ID()))
 157       ->setValue(aCenter2d->x() + aMajorDir2d->x() * aMajorRadius,
 158                  aCenter2d->y() + aMajorDir2d->y() * aMajorRadius);
 159   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MINOR_AXIS_START_ID()))
 160       ->setValue(aCenter2d->x() - aMinorDir2d->x() * aMinorRadius,
 161                  aCenter2d->y() - aMinorDir2d->y() * aMinorRadius);
 162   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MINOR_AXIS_END_ID()))
 163       ->setValue(aCenter2d->x() + aMinorDir2d->x() * aMinorRadius,
 164                  aCenter2d->y() + aMinorDir2d->y() * aMinorRadius);
 165   data()->blockSendAttributeUpdated(aWasBlocked);
 166
 167   return true;
 168 }
 169
 170 void SketchPlugin_Ellipse::createEllipse(SketchPlugin_Sketch* theSketch, const int theResultIndex)
 171 {
 172   // Compute a ellipse in 3D view.
 173   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 174     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 175   std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 176     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(FIRST_FOCUS_ID()));
 177
 178   double aMajorRadius = real(MAJOR_RADIUS_ID())->value();
 179   double aMinorRadius = real(MINOR_RADIUS_ID())->value();
 180
 181   std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
 182     theSketch->attribute(SketchPlugin_Sketch::NORM_ID()));
 183
 184   GeomPointPtr aCenter(theSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
 185   GeomPointPtr aFocus(theSketch->to3D(aFocusAttr->x(), aFocusAttr->y()));
 186   GeomDirPtr aNormal = aNDir->dir();
 187   std::shared_ptr<GeomAPI_Shape> anEllipseShape;
 188   if (aFocus->distance(aCenter) > tolerance) {
 189     GeomDirPtr aMajorAxis(new GeomAPI_Dir(aFocus->x() - aCenter->x(),
 190         aFocus->y() - aCenter->y(), aFocus->z() - aCenter->z()));
 191
 192     anEllipseShape =
 193         GeomAlgoAPI_EdgeBuilder::ellipse(aCenter, aNormal, aMajorAxis, aMajorRadius, aMinorRadius);
 194   }
 195   else {
 196     // build circle instead of ellipse
 197     anEllipseShape = GeomAlgoAPI_EdgeBuilder::lineCircle(aCenter, aNormal, aMajorRadius);
 198   }
 199
 200   ResultConstructionPtr aResult = document()->createConstruction(data(), theResultIndex);
 201   aResult->setShape(anEllipseShape);
 202   aResult->setIsInHistory(false);
 203   setResult(aResult, theResultIndex);
 204 }