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 #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 center of the ellipse.
  81   int aResultIndex = 0;
  82   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, CENTER_ID(), aResultIndex++);
  83   // Make a visible ellipse.
  84   createEllipse(aSketch, aResultIndex);
  85 }
  86
  87 bool SketchPlugin_Ellipse::isFixed() {
  88   return data()->selection(EXTERNAL_ID())->context().get() != NULL;
  89 }
  90
  91 void SketchPlugin_Ellipse::attributeChanged(const std::string& theID) {
  92   // the second condition for unability to move external segments anywhere
  93   if (theID == EXTERNAL_ID() || isFixed()) {
  94     std::shared_ptr<GeomAPI_Shape> aSelection = data()->selection(EXTERNAL_ID())->value();
  95     if (!aSelection) {
  96       // empty shape in selection shows that the shape is equal to context
  97       ResultPtr anExtRes = selection(EXTERNAL_ID())->context();
  98       if (anExtRes)
  99         aSelection = anExtRes->shape();
 100     }
 101     // update arguments due to the selection value
 102     if (aSelection && !aSelection->isNull() && aSelection->isEdge()) {
 103       std::shared_ptr<GeomAPI_Edge> anEdge( new GeomAPI_Edge(aSelection));
 104       std::shared_ptr<GeomAPI_Ellipse> anEllipse = anEdge->ellipse();
 105
 106       std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 107           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(CENTER_ID()));
 108       aCenterAttr->setValue(sketch()->to2D(anEllipse->center()));
 109
 110       std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 111           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(FIRST_FOCUS_ID()));
 112       aFocusAttr->setValue(sketch()->to2D(anEllipse->firstFocus()));
 113
 114       real(MAJOR_RADIUS_ID())->setValue(anEllipse->majorRadius());
 115       real(MINOR_RADIUS_ID())->setValue(anEllipse->minorRadius());
 116     }
 117   }
 118 }
 119
 120 bool SketchPlugin_Ellipse::fillCharacteristicPoints()
 121 {
 122   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 123       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 124   std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 125       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(FIRST_FOCUS_ID()));
 126
 127   AttributeDoublePtr aMinorRadiusAttr = real(MINOR_RADIUS_ID());
 128
 129   if (!aCenterAttr->isInitialized() ||
 130       !aFocusAttr->isInitialized() ||
 131       !aMinorRadiusAttr->isInitialized()) {
 132     return false;
 133   }
 134
 135   double aMinorRadius = aMinorRadiusAttr->value();
 136   if (aMinorRadius < tolerance) {
 137     return false;
 138   }
 139
 140   data()->blockSendAttributeUpdated(true);
 141   GeomPnt2dPtr aCenter2d = aCenterAttr->pnt();
 142   GeomPnt2dPtr aFocus2d = aFocusAttr->pnt();
 143   GeomDir2dPtr aMajorDir2d(new GeomAPI_Dir2d(aFocus2d->x() - aCenter2d->x(),
 144     aFocus2d->y() - aCenter2d->y()));
 145   GeomDir2dPtr aMinorDir2d(new GeomAPI_Dir2d(-aMajorDir2d->y(), aMajorDir2d->x()));
 146
 147   AttributeDoublePtr aMajorRadiusAttr = real(MAJOR_RADIUS_ID());
 148   double aFocalDist = aCenter2d->distance(aFocus2d);
 149   double aMajorRadius = sqrt(aFocalDist * aFocalDist + aMinorRadius * aMinorRadius);
 150   aMajorRadiusAttr->setValue(aMajorRadius);
 151
 152   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(SECOND_FOCUS_ID()))
 153     ->setValue(2.0 * aCenter2d->x() - aFocus2d->x(), 2.0 * aCenter2d->y() - aFocus2d->y());
 154   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MAJOR_AXIS_START_ID()))
 155       ->setValue(aCenter2d->x() - aMajorDir2d->x() * aMajorRadius,
 156                  aCenter2d->y() - aMajorDir2d->y() * aMajorRadius);
 157   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MAJOR_AXIS_END_ID()))
 158       ->setValue(aCenter2d->x() + aMajorDir2d->x() * aMajorRadius,
 159                  aCenter2d->y() + aMajorDir2d->y() * aMajorRadius);
 160   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MINOR_AXIS_START_ID()))
 161       ->setValue(aCenter2d->x() - aMinorDir2d->x() * aMinorRadius,
 162                  aCenter2d->y() - aMinorDir2d->y() * aMinorRadius);
 163   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(MINOR_AXIS_END_ID()))
 164       ->setValue(aCenter2d->x() + aMinorDir2d->x() * aMinorRadius,
 165                  aCenter2d->y() + aMinorDir2d->y() * aMinorRadius);
 166   data()->blockSendAttributeUpdated(false);
 167
 168   return true;
 169 }
 170
 171 void SketchPlugin_Ellipse::createEllipse(SketchPlugin_Sketch* theSketch, const int theResultIndex)
 172 {
 173   // Compute a ellipse in 3D view.
 174   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 175     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 176   std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 177     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(FIRST_FOCUS_ID()));
 178
 179   double aMajorRadius = real(MAJOR_RADIUS_ID())->value();
 180   double aMinorRadius = real(MINOR_RADIUS_ID())->value();
 181
 182   std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
 183     theSketch->attribute(SketchPlugin_Sketch::NORM_ID()));
 184
 185   GeomPointPtr aCenter(theSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
 186   GeomPointPtr aFocus(theSketch->to3D(aFocusAttr->x(), aFocusAttr->y()));
 187   GeomDirPtr aNormal = aNDir->dir();
 188   std::shared_ptr<GeomAPI_Shape> anEllipseShape;
 189   if (aFocus->distance(aCenter) > tolerance) {
 190     GeomDirPtr aMajorAxis(new GeomAPI_Dir(aFocus->x() - aCenter->x(),
 191         aFocus->y() - aCenter->y(), aFocus->z() - aCenter->z()));
 192
 193     anEllipseShape =
 194         GeomAlgoAPI_EdgeBuilder::ellipse(aCenter, aNormal, aMajorAxis, aMajorRadius, aMinorRadius);
 195   }
 196   else {
 197     // build circle instead of ellipse
 198     anEllipseShape = GeomAlgoAPI_EdgeBuilder::lineCircle(aCenter, aNormal, aMajorRadius);
 199   }
 200
 201   ResultConstructionPtr aResult = document()->createConstruction(data(), theResultIndex);
 202   aResult->setShape(anEllipseShape);
 203   aResult->setIsInHistory(false);
 204   setResult(aResult, theResultIndex);
 205 }