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