src/SketchPlugin/SketchPlugin_Ellipse.cpp

   1 // Copyright (C) 2017-2019  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 <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 static const double tolerance = 1e-7;
  38
  39
  40 SketchPlugin_Ellipse::SketchPlugin_Ellipse()
  41 : SketchPlugin_SketchEntity()
  42 {
  43 }
  44
  45 void SketchPlugin_Ellipse::initDerivedClassAttributes()
  46 {
  47   data()->addAttribute(CENTER_ID(), GeomDataAPI_Point2D::typeId());
  48   data()->addAttribute(FIRST_FOCUS_ID(), GeomDataAPI_Point2D::typeId());
  49   data()->addAttribute(SECOND_FOCUS_ID(), GeomDataAPI_Point2D::typeId());
  50   data()->addAttribute(MAJOR_AXIS_START_ID(), GeomDataAPI_Point2D::typeId());
  51   data()->addAttribute(MAJOR_AXIS_END_ID(), GeomDataAPI_Point2D::typeId());
  52   data()->addAttribute(MINOR_AXIS_START_ID(), GeomDataAPI_Point2D::typeId());
  53   data()->addAttribute(MINOR_AXIS_END_ID(), GeomDataAPI_Point2D::typeId());
  54   data()->addAttribute(MAJOR_RADIUS_ID(), ModelAPI_AttributeDouble::typeId());
  55   data()->addAttribute(MINOR_RADIUS_ID(), ModelAPI_AttributeDouble::typeId());
  56
  57   data()->addAttribute(EXTERNAL_ID(), ModelAPI_AttributeSelection::typeId());
  58   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), EXTERNAL_ID());
  59 }
  60
  61 void SketchPlugin_Ellipse::execute()
  62 {
  63   SketchPlugin_Sketch* aSketch = sketch();
  64   if(!aSketch) {
  65     return;
  66   }
  67
  68   // Calculate all characteristics of the ellipse.
  69   fillCharacteristicPoints();
  70
  71   // Make visible points related to ellipse characteristics.
  72   int aResultIndex = 0;
  73   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, CENTER_ID(), aResultIndex++);
  74   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, FIRST_FOCUS_ID(), aResultIndex++);
  75   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, SECOND_FOCUS_ID(), aResultIndex++);
  76   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, MAJOR_AXIS_START_ID(), aResultIndex++);
  77   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, MAJOR_AXIS_END_ID(), aResultIndex++);
  78   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, MINOR_AXIS_START_ID(), aResultIndex++);
  79   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, MINOR_AXIS_END_ID(), aResultIndex++);
  80
  81   // Make auxiliary axes
  82   SketchPlugin_Sketch::createLine2DResult(this, aSketch,
  83       MAJOR_AXIS_START_ID(), MAJOR_AXIS_END_ID(), aResultIndex++);
  84   SketchPlugin_Sketch::createLine2DResult(this, aSketch,
  85       MINOR_AXIS_START_ID(), MINOR_AXIS_END_ID(), aResultIndex++);
  86
  87   // Mark already created results auxiliary
  88   myAuxiliaryResults.clear();
  89   const std::list<ResultPtr>& aResults = results();
  90   std::list<ResultPtr>::const_iterator anIt = aResults.begin();
  91   for (int anIndex = 0; anIt != aResults.end() && anIndex < aResultIndex; ++anIt, ++anIndex)
  92     myAuxiliaryResults.insert(*anIt);
  93
  94   // Make a visible ellipse.
  95   createEllipse(aSketch, aResultIndex);
  96 }
  97
  98 bool SketchPlugin_Ellipse::isFixed() {
  99   return data()->selection(EXTERNAL_ID())->context().get() != NULL;
 100 }
 101
 102 bool SketchPlugin_Ellipse::isAuxiliary(ResultPtr theResult)
 103 {
 104   return myAuxiliaryResults.find(theResult) != myAuxiliaryResults.end();
 105 }
 106
 107 void SketchPlugin_Ellipse::attributeChanged(const std::string& theID) {
 108   // the second condition for unability to move external segments anywhere
 109   if (theID == EXTERNAL_ID() || isFixed()) {
 110     std::shared_ptr<GeomAPI_Shape> aSelection = data()->selection(EXTERNAL_ID())->value();
 111     if (!aSelection) {
 112       // empty shape in selection shows that the shape is equal to context
 113       ResultPtr anExtRes = selection(EXTERNAL_ID())->context();
 114       if (anExtRes)
 115         aSelection = anExtRes->shape();
 116     }
 117     // update arguments due to the selection value
 118     if (aSelection && !aSelection->isNull() && aSelection->isEdge()) {
 119       std::shared_ptr<GeomAPI_Edge> anEdge( new GeomAPI_Edge(aSelection));
 120       std::shared_ptr<GeomAPI_Ellipse> anEllipse = anEdge->ellipse();
 121
 122       std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 123           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(CENTER_ID()));
 124       aCenterAttr->setValue(sketch()->to2D(anEllipse->center()));
 125
 126       std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 127           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(FIRST_FOCUS_ID()));
 128       aFocusAttr->setValue(sketch()->to2D(anEllipse->firstFocus()));
 129
 130       real(MAJOR_RADIUS_ID())->setValue(anEllipse->majorRadius());
 131       real(MINOR_RADIUS_ID())->setValue(anEllipse->minorRadius());
 132     }
 133   }
 134 }
 135
 136 bool SketchPlugin_Ellipse::fillCharacteristicPoints()
 137 {
 138   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 139       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 140   std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 141       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(FIRST_FOCUS_ID()));
 142
 143   AttributeDoublePtr aMajorRadiusAttr = real(MAJOR_RADIUS_ID());
 144   AttributeDoublePtr aMinorRadiusAttr = real(MINOR_RADIUS_ID());
 145
 146   if (!aCenterAttr->isInitialized() ||
 147       !aFocusAttr->isInitialized() ||
 148       !aMajorRadiusAttr->isInitialized() ||
 149       !aMinorRadiusAttr->isInitialized()) {
 150     return false;
 151   }
 152
 153   double aMajorRadius = aMajorRadiusAttr->value();
 154   double aMinorRadius = aMinorRadiusAttr->value();
 155   if (aMajorRadius < tolerance || aMinorRadius < tolerance) {
 156     return false;
 157   }
 158
 159   data()->blockSendAttributeUpdated(true);
 160   GeomPnt2dPtr aCenter2d = aCenterAttr->pnt();
 161   GeomPnt2dPtr aFocus2d = aFocusAttr->pnt();
 162   GeomDir2dPtr aMajorDir2d(new GeomAPI_Dir2d(aFocus2d->x() - aCenter2d->x(),
 163     aFocus2d->y() - aCenter2d->y()));
 164   GeomDir2dPtr aMinorDir2d(new GeomAPI_Dir2d(-aMajorDir2d->y(), aMajorDir2d->x()));
 165   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(SECOND_FOCUS_ID()))
 166     ->setValue(2.0 * aCenter2d->x() - aFocus2d->x(), 2.0 * aCenter2d->y() - aFocus2d->y());
 167   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MAJOR_AXIS_START_ID()))
 168       ->setValue(aCenter2d->x() - aMajorDir2d->x() * aMajorRadius,
 169                  aCenter2d->y() - aMajorDir2d->y() * aMajorRadius);
 170   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MAJOR_AXIS_END_ID()))
 171       ->setValue(aCenter2d->x() + aMajorDir2d->x() * aMajorRadius,
 172                  aCenter2d->y() + aMajorDir2d->y() * aMajorRadius);
 173   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MINOR_AXIS_START_ID()))
 174       ->setValue(aCenter2d->x() - aMinorDir2d->x() * aMinorRadius,
 175                  aCenter2d->y() - aMinorDir2d->y() * aMinorRadius);
 176   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MINOR_AXIS_END_ID()))
 177       ->setValue(aCenter2d->x() + aMinorDir2d->x() * aMinorRadius,
 178                  aCenter2d->y() + aMinorDir2d->y() * aMinorRadius);
 179   data()->blockSendAttributeUpdated(false);
 180
 181   return true;
 182 }
 183
 184 void SketchPlugin_Ellipse::createEllipse(SketchPlugin_Sketch* theSketch, const int theResultIndex)
 185 {
 186   // Compute a ellipse in 3D view.
 187   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 188     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 189   std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 190     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(FIRST_FOCUS_ID()));
 191
 192   double aMajorRadius = real(MAJOR_RADIUS_ID())->value();
 193   double aMinorRadius = real(MINOR_RADIUS_ID())->value();
 194
 195   std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
 196     theSketch->attribute(SketchPlugin_Sketch::NORM_ID()));
 197
 198   GeomPointPtr aCenter(theSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
 199   GeomPointPtr aFocus(theSketch->to3D(aFocusAttr->x(), aFocusAttr->y()));
 200   GeomDirPtr aNormal = aNDir->dir();
 201   std::shared_ptr<GeomAPI_Shape> anEllipseShape;
 202   if (aFocus->distance(aCenter) > tolerance) {
 203     GeomDirPtr aMajorAxis(new GeomAPI_Dir(aFocus->x() - aCenter->x(),
 204         aFocus->y() - aCenter->y(), aFocus->z() - aCenter->z()));
 205
 206     anEllipseShape =
 207         GeomAlgoAPI_EdgeBuilder::ellipse(aCenter, aNormal, aMajorAxis, aMajorRadius, aMinorRadius);
 208   }
 209   else {
 210     // build circle instead of ellipse
 211     anEllipseShape = GeomAlgoAPI_EdgeBuilder::lineCircle(aCenter, aNormal, aMajorRadius);
 212   }
 213
 214   ResultConstructionPtr aResult = document()->createConstruction(data(), theResultIndex);
 215   aResult->setShape(anEllipseShape);
 216   aResult->setIsInHistory(false);
 217   setResult(aResult, theResultIndex);
 218 }