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 // File:        SketchPlugin_Ellipse.cpp
  21 // Created:     26 April 2017
  22 // Author:      Artem ZHIDKOV
  23
  24 #include <SketchPlugin_Ellipse.h>
  25 #include <SketchPlugin_Sketch.h>
  26
  27 #include <GeomAlgoAPI_EdgeBuilder.h>
  28 #include <GeomAPI_Edge.h>
  29 #include <GeomAPI_Ellipse.h>
  30 #include <GeomDataAPI_Point2D.h>
  31 #include <ModelAPI_AttributeDouble.h>
  32 #include <ModelAPI_ResultConstruction.h>
  33 #include <ModelAPI_Session.h>
  34 #include <ModelAPI_Validator.h>
  35
  36 static const double tolerance = 1e-7;
  37
  38
  39 SketchPlugin_Ellipse::SketchPlugin_Ellipse()
  40 : SketchPlugin_SketchEntity()
  41 {
  42 }
  43
  44 void SketchPlugin_Ellipse::initDerivedClassAttributes()
  45 {
  46   data()->addAttribute(CENTER_ID(), GeomDataAPI_Point2D::typeId());
  47   data()->addAttribute(FOCUS_ID(), GeomDataAPI_Point2D::typeId());
  48   data()->addAttribute(MAJOR_RADIUS_ID(), ModelAPI_AttributeDouble::typeId());
  49   data()->addAttribute(MINOR_RADIUS_ID(), ModelAPI_AttributeDouble::typeId());
  50
  51   data()->addAttribute(EXTERNAL_ID(), ModelAPI_AttributeSelection::typeId());
  52   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), EXTERNAL_ID());
  53 }
  54
  55 void SketchPlugin_Ellipse::execute()
  56 {
  57   SketchPlugin_Sketch* aSketch = sketch();
  58   if(!aSketch) {
  59     return;
  60   }
  61
  62   // Compute a ellipse in 3D view.
  63   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
  64       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
  65   std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
  66       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(FOCUS_ID()));
  67   AttributeDoublePtr aMajorRadiusAttr = real(MAJOR_RADIUS_ID());
  68   AttributeDoublePtr aMinorRadiusAttr = real(MINOR_RADIUS_ID());
  69   if (!aCenterAttr->isInitialized() ||
  70       !aFocusAttr->isInitialized() ||
  71       !aMajorRadiusAttr->isInitialized() ||
  72       !aMinorRadiusAttr->isInitialized()) {
  73     return;
  74   }
  75
  76   double aMajorRadius = aMajorRadiusAttr->value();
  77   double aMinorRadius = aMinorRadiusAttr->value();
  78   if(aMajorRadius < tolerance || aMinorRadius < tolerance) {
  79     return;
  80   }
  81
  82   // Make a visible point.
  83   SketchPlugin_Sketch::createPoint2DResult(this, aSketch, CENTER_ID(), 0);
  84
  85   std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
  86       aSketch->attribute(SketchPlugin_Sketch::NORM_ID()));
  87
  88   // Make a visible ellipse.
  89   std::shared_ptr<GeomAPI_Pnt> aCenter(aSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
  90   std::shared_ptr<GeomAPI_Pnt> aFocus(aSketch->to3D(aFocusAttr->x(), aFocusAttr->y()));
  91   std::shared_ptr<GeomAPI_Dir> aNormal = aNDir->dir();
  92   std::shared_ptr<GeomAPI_Dir> aMajorAxis(new GeomAPI_Dir(aFocus->x() - aCenter->x(),
  93       aFocus->y() - aCenter->y(), aFocus->z() - aCenter->z()));
  94
  95   std::shared_ptr<GeomAPI_Shape> anEllipseShape =
  96       GeomAlgoAPI_EdgeBuilder::ellipse(aCenter, aNormal, aMajorAxis, aMajorRadius, aMinorRadius);
  97
  98   std::shared_ptr<ModelAPI_ResultConstruction> aResult = document()->createConstruction(data(), 1);
  99   aResult->setShape(anEllipseShape);
 100   aResult->setIsInHistory(false);
 101   setResult(aResult, 1);
 102 }
 103
 104 bool SketchPlugin_Ellipse::isFixed() {
 105   return data()->selection(EXTERNAL_ID())->context().get() != NULL;
 106 }
 107
 108 void SketchPlugin_Ellipse::attributeChanged(const std::string& theID) {
 109   // the second condition for unability to move external segments anywhere
 110   if (theID == EXTERNAL_ID() || isFixed()) {
 111     std::shared_ptr<GeomAPI_Shape> aSelection = data()->selection(EXTERNAL_ID())->value();
 112     if (!aSelection) {
 113       // empty shape in selection shows that the shape is equal to context
 114       ResultPtr anExtRes = selection(EXTERNAL_ID())->context();
 115       if (anExtRes)
 116         aSelection = anExtRes->shape();
 117     }
 118     // update arguments due to the selection value
 119     if (aSelection && !aSelection->isNull() && aSelection->isEdge()) {
 120       std::shared_ptr<GeomAPI_Edge> anEdge( new GeomAPI_Edge(aSelection));
 121       std::shared_ptr<GeomAPI_Ellipse> anEllipse = anEdge->ellipse();
 122
 123       std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr =
 124           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(CENTER_ID()));
 125       aCenterAttr->setValue(sketch()->to2D(anEllipse->center()));
 126
 127       std::shared_ptr<GeomDataAPI_Point2D> aFocusAttr =
 128           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(FOCUS_ID()));
 129       aFocusAttr->setValue(sketch()->to2D(anEllipse->firstFocus()));
 130
 131       real(MAJOR_RADIUS_ID())->setValue(anEllipse->majorRadius());
 132       real(MINOR_RADIUS_ID())->setValue(anEllipse->minorRadius());
 133     }
 134   }
 135 }