src/SketchPlugin/SketchPlugin_ConstraintLength.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 "SketchPlugin_ConstraintLength.h"
  22 #include <SketchPlugin_Line.h>
  23
  24 #include <GeomDataAPI_Point2D.h>
  25
  26 #include <SketcherPrs_Factory.h>
  27
  28 #include <ModelAPI_AttributeDouble.h>
  29 #include <ModelAPI_AttributeInteger.h>
  30 #include <ModelAPI_Data.h>
  31 #include <ModelAPI_Result.h>
  32
  33 #include <GeomDataAPI_Point2D.h>
  34
  35 #include <GeomAPI_Dir2d.h>
  36 #include <GeomAPI_Lin2d.h>
  37 #include <GeomAPI_Pnt2d.h>
  38 #include <GeomAPI_XY.h>
  39
  40 #include <Config_PropManager.h>
  41
  42 #include <math.h>
  43
  44 const double tolerance = 1e-7;
  45
  46 SketchPlugin_ConstraintLength::SketchPlugin_ConstraintLength()
  47 {
  48   myFlyoutUpdate = false;
  49 }
  50
  51 void SketchPlugin_ConstraintLength::initAttributes()
  52 {
  53   data()->addAttribute(SketchPlugin_Constraint::VALUE(), ModelAPI_AttributeDouble::typeId());
  54   data()->addAttribute(SketchPlugin_Constraint::FLYOUT_VALUE_PNT(), GeomDataAPI_Point2D::typeId());
  55   data()->addAttribute(SketchPlugin_Constraint::ENTITY_A(), ModelAPI_AttributeRefAttr::typeId());
  56
  57   data()->addAttribute(SketchPlugin_ConstraintLength::LOCATION_TYPE_ID(),
  58                        ModelAPI_AttributeInteger::typeId());
  59 }
  60
  61 void SketchPlugin_ConstraintLength::colorConfigInfo(std::string& theSection, std::string& theName,
  62                                                     std::string& theDefault)
  63 {
  64   theSection = "Visualization";
  65   theName = "sketch_dimension_color";
  66   theDefault = SKETCH_DIMENSION_COLOR;
  67 }
  68
  69 void SketchPlugin_ConstraintLength::execute()
  70 {
  71   std::shared_ptr<ModelAPI_AttributeRefAttr> aRef = std::dynamic_pointer_cast<
  72       ModelAPI_AttributeRefAttr>(data()->attribute(SketchPlugin_Constraint::ENTITY_A()));
  73   FeaturePtr aFeature = ModelAPI_Feature::feature(aRef->object());
  74   if (aFeature) {
  75     // set length value
  76     std::shared_ptr<GeomDataAPI_Point2D> aPoint1 = std::dynamic_pointer_cast<
  77         GeomDataAPI_Point2D>(aFeature->data()->attribute(SketchPlugin_Line::START_ID()));
  78     std::shared_ptr<GeomDataAPI_Point2D> aPoint2 = std::dynamic_pointer_cast<
  79         GeomDataAPI_Point2D>(aFeature->data()->attribute(SketchPlugin_Line::END_ID()));
  80
  81     double aLenght = aPoint1->pnt()->distance(aPoint2->pnt());
  82
  83     //std::shared_ptr<ModelAPI_AttributeDouble> aValueAttr = std::dynamic_pointer_cast<
  84     //    ModelAPI_AttributeDouble>(data()->attribute(SketchPlugin_Constraint::VALUE()));
  85     //if(!aValueAttr->isInitialized()) {
  86     //  aValueAttr->setValue(aLenght);
  87     //}
  88
  89     // the value should to be computed here, not in the getAISObject
  90     // in order to change the model value
  91     // inside the object transaction. This is important for creating a constraint by preselection.
  92     // The display of the presentation in this case happens after the transaction commit
  93     AttributePtr aFlyOutAttribute =
  94       data()->attribute(SketchPlugin_Constraint::FLYOUT_VALUE_PNT());
  95     if (!aFlyOutAttribute->isInitialized()) {
  96       compute(SketchPlugin_Constraint::FLYOUT_VALUE_PNT());
  97     }
  98   }
  99 }
 100
 101 bool SketchPlugin_ConstraintLength::compute(const std::string& theAttributeId)
 102 {
 103   if (theAttributeId != SketchPlugin_Constraint::FLYOUT_VALUE_PNT())
 104     return false;
 105
 106   std::shared_ptr<GeomAPI_Pnt> aPoint1, aPoint2;
 107   std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 108   if (!getPoints(aPoint1, aPoint2, aStartPoint, anEndPoint))
 109     return false;
 110
 111   std::shared_ptr<GeomDataAPI_Point2D> aFlyOutAttr = std::dynamic_pointer_cast<
 112       GeomDataAPI_Point2D>(data()->attribute(theAttributeId));
 113
 114   std::shared_ptr<GeomAPI_Lin2d> aLine =
 115     std::shared_ptr<GeomAPI_Lin2d>(new GeomAPI_Lin2d(aStartPoint->pnt(), anEndPoint->pnt()));
 116   if (!aFlyOutAttr->isInitialized() ||
 117       (fabs(aFlyOutAttr->x()) < tolerance && fabs(aFlyOutAttr->y()) < tolerance)) {
 118     double aDist = aPoint1->distance(aPoint2)/5.;
 119     std::shared_ptr<GeomAPI_Pnt2d> aFPnt = aLine->shiftedLocation(aDist);
 120     aFlyOutAttr->setValue(aFPnt);
 121   }
 122
 123   return true;
 124 }
 125
 126 bool SketchPlugin_ConstraintLength::computeLenghtValue(double& theValue)
 127 {
 128   bool aResult = false;
 129   std::shared_ptr<GeomAPI_Pnt> aPoint1, aPoint2;
 130   std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 131   if (getPoints(aPoint1, aPoint2, aStartPoint, anEndPoint)) {
 132     theValue = aPoint1->distance(aPoint2);
 133     aResult = true;
 134   }
 135   return aResult;
 136 }
 137
 138 bool SketchPlugin_ConstraintLength::getPoints(
 139   std::shared_ptr<GeomAPI_Pnt>& thePoint1, std::shared_ptr<GeomAPI_Pnt>& thePoint2,
 140   std::shared_ptr<GeomDataAPI_Point2D>& theStartPoint,
 141   std::shared_ptr<GeomDataAPI_Point2D>& theEndPoint)
 142 {
 143   if (!sketch())
 144     return false;
 145   std::shared_ptr<ModelAPI_AttributeRefAttr> anAttr = std::dynamic_pointer_cast<
 146       ModelAPI_AttributeRefAttr>(data()->attribute(SketchPlugin_Constraint::ENTITY_A()));
 147   if (!anAttr)
 148     return false;
 149   FeaturePtr aFeature = ModelAPI_Feature::feature(anAttr->object());
 150   if (!aFeature || aFeature->getKind() != SketchPlugin_Line::ID())
 151     return false;
 152   DataPtr aData = aFeature->data();
 153   theStartPoint = std::dynamic_pointer_cast<
 154       GeomDataAPI_Point2D>(aData->attribute(SketchPlugin_Line::START_ID()));
 155   theEndPoint = std::dynamic_pointer_cast<
 156       GeomDataAPI_Point2D>(aData->attribute(SketchPlugin_Line::END_ID()));
 157   thePoint1 = sketch()->to3D(theStartPoint->x(), theStartPoint->y());
 158   thePoint2 = sketch()->to3D(theEndPoint->x(), theEndPoint->y());
 159   return true;
 160 }
 161
 162 AISObjectPtr SketchPlugin_ConstraintLength::getAISObject(AISObjectPtr thePrevious)
 163 {
 164   if (!sketch())
 165     return thePrevious;
 166
 167   AISObjectPtr anAIS = SketcherPrs_Factory::lengthDimensionConstraint(this,
 168     sketch()->coordinatePlane(), thePrevious);
 169   return anAIS;
 170 }
 171
 172 void SketchPlugin_ConstraintLength::attributeChanged(const std::string& theID) {
 173   if (theID == SketchPlugin_Constraint::ENTITY_A())
 174   {
 175     std::shared_ptr<ModelAPI_AttributeDouble> aValueAttr = std::dynamic_pointer_cast<
 176       ModelAPI_AttributeDouble>(attribute(SketchPlugin_Constraint::VALUE()));
 177     if (!aValueAttr->isInitialized()) {
 178       // only if it is not initialized, try to compute the current value
 179       double aLength;
 180       if (computeLenghtValue(aLength))
 181         aValueAttr->setValue(aLength);
 182     }
 183   } else if (theID == SketchPlugin_Constraint::FLYOUT_VALUE_PNT() && !myFlyoutUpdate) {
 184     // Recalculate flyout point in local coordinates of the line:
 185     // the X coordinate is a length of projection of the flyout point on the line
 186     // the Y coordinate is a distance from the point to the line
 187     std::shared_ptr<GeomDataAPI_Point2D> aFlyoutAttr =
 188         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 189         attribute(SketchPlugin_Constraint::FLYOUT_VALUE_PNT()));
 190     AttributeRefAttrPtr aLineAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 191         attribute(SketchPlugin_Constraint::ENTITY_A()));
 192     if (!aLineAttr || !aLineAttr->isObject())
 193       return;
 194     FeaturePtr aLine = ModelAPI_Feature::feature(aLineAttr->object());
 195     if (!aLine || aLine->getKind() != SketchPlugin_Line::ID())
 196       return;
 197
 198     std::shared_ptr<GeomAPI_Pnt2d> aFlyoutPnt = aFlyoutAttr->pnt();
 199     std::shared_ptr<GeomAPI_XY> aStartPnt = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 200         aLine->attribute(SketchPlugin_Line::START_ID()))->pnt()->xy();
 201     std::shared_ptr<GeomAPI_XY> aEndPnt = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 202         aLine->attribute(SketchPlugin_Line::END_ID()))->pnt()->xy();
 203
 204     myFlyoutUpdate = true;
 205     std::shared_ptr<GeomAPI_Dir2d> aLineDir(new GeomAPI_Dir2d(aEndPnt->decreased(aStartPnt)));
 206     std::shared_ptr<GeomAPI_XY> aFlyoutDir = aFlyoutPnt->xy()->decreased(aStartPnt);
 207     double X = aFlyoutDir->dot(aLineDir->xy());
 208     double Y = -aFlyoutDir->cross(aLineDir->xy());
 209     aFlyoutAttr->setValue(X, Y);
 210     myFlyoutUpdate = false;
 211   }
 212 }