src/ModelGeomAlgo/ModelGeomAlgo_Shape.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 <GeomAPI_Shape.h>
  22
  23 #include "ModelGeomAlgo_Shape.h"
  24
  25 #include <ModelAPI_AttributeSelection.h>
  26 #include <ModelAPI_CompositeFeature.h>
  27 #include <ModelAPI_Feature.h>
  28 #include <ModelAPI_Result.h>
  29 #include <ModelAPI_ResultBody.h>
  30 #include <ModelAPI_ResultConstruction.h>
  31
  32 #include <GeomAPI_Circ.h>
  33 #include <GeomAPI_Ellipse.h>
  34 #include <GeomAPI_PlanarEdges.h>
  35 #include <GeomAPI_Pnt.h>
  36
  37
  38 #ifdef WIN32
  39 #pragma warning(disable : 4996) // for sprintf
  40 #endif
  41
  42 namespace ModelGeomAlgo_Shape
  43 {
  44   void shapesOfType(const FeaturePtr& theFeature,
  45                     const GeomAPI_Shape::ShapeType& theType,
  46                     std::set<ResultPtr>& theShapeResults)
  47   {
  48     theShapeResults.clear();
  49     std::list<ResultPtr> aResults = theFeature->results();
  50     std::list<ResultPtr>::const_iterator aRIter = aResults.cbegin();
  51     for (; aRIter != aResults.cend(); aRIter++) {
  52       ResultPtr aResult = *aRIter;
  53       GeomShapePtr aShape = aResult->shape();
  54       if (aShape.get() && aShape->shapeType() == theType)
  55         theShapeResults.insert(aResult);
  56     }
  57   }
  58
  59   // Check the point is within shape's bounding box
  60   static bool isPointWithinBB(const GeomPointPtr& thePoint,
  61                               const GeomShapePtr& theShape,
  62                               const double theTolerance)
  63   {
  64     double aXMin, aXMax, aYMin, aYMax, aZMin, aZMax;
  65     return theShape->computeSize(aXMin, aYMin, aZMin, aXMax, aYMax, aZMax) &&
  66            thePoint->x() >= aXMin - theTolerance && thePoint->x() <= aXMax + theTolerance &&
  67            thePoint->y() >= aYMin - theTolerance && thePoint->y() <= aYMax + theTolerance &&
  68            thePoint->z() >= aZMin - theTolerance && thePoint->z() <= aZMax + theTolerance;
  69   }
  70
  71   // Select sub-shape of the given type, which contains the given point
  72   static std::list<GeomShapePtr> findSubShape(const GeomShapePtr& theShape,
  73                                               const GeomAPI_Shape::ShapeType& theType,
  74                                               const GeomPointPtr& thePoint,
  75                                               const double theTolerance)
  76   {
  77     std::list<GeomShapePtr> aFoundSubs;
  78     std::list<GeomShapePtr> aSubs = theShape->subShapes(theType);
  79     for (std::list<GeomShapePtr>::const_iterator aSubIt = aSubs.begin();
  80          aSubIt != aSubs.end(); ++aSubIt) {
  81       GeomPointPtr aMiddlePoint = (*aSubIt)->middlePoint();
  82       if (aMiddlePoint && aMiddlePoint->distance(thePoint) < theTolerance)
  83         aFoundSubs.push_back(*aSubIt);
  84     }
  85     return aFoundSubs;
  86   }
  87
  88   // Find circular/elliptical edge, which center/focus coincide with the given point
  89   static GeomShapePtr findEdgeByCenter(const GeomShapePtr& theBaseShape,
  90                                        const GeomPointPtr& theCenter,
  91                                        const double theTolerance,
  92                                        int& theCenterType)
  93   {
  94     theCenterType = (int)ModelAPI_AttributeSelection::NOT_CENTER;
  95     std::list<GeomShapePtr> anEdges = theBaseShape->subShapes(GeomAPI_Shape::EDGE);
  96     for (std::list<GeomShapePtr>::const_iterator anIt = anEdges.begin();
  97          anIt != anEdges.end(); ++anIt) {
  98       GeomEdgePtr anEdge = (*anIt)->edge();
  99       if (!anEdge)
 100         continue;
 101
 102       if (anEdge->isCircle()) {
 103         GeomCirclePtr aCircle = anEdge->circle();
 104         if (aCircle->center()->distance(theCenter) < theTolerance) {
 105           theCenterType = (int)ModelAPI_AttributeSelection::CIRCLE_CENTER;
 106           return *anIt;
 107         }
 108       }
 109       else if (anEdge->isEllipse()) {
 110         GeomEllipsePtr anEllipse = anEdge->ellipse();
 111         if (anEllipse->firstFocus()->distance(theCenter) < theTolerance)
 112           theCenterType = (int)ModelAPI_AttributeSelection::ELLIPSE_FIRST_FOCUS;
 113         else if (anEllipse->secondFocus()->distance(theCenter) < theTolerance)
 114           theCenterType = (int)ModelAPI_AttributeSelection::ELLIPSE_SECOND_FOCUS;
 115
 116         if (theCenterType != (int)ModelAPI_AttributeSelection::NOT_CENTER)
 117           return *anIt;
 118       }
 119     }
 120
 121     // not found
 122     return GeomShapePtr();
 123   }
 124
 125   static void appendSubshapeOfResult(std::list<SubshapeOfResult>& theList,
 126       const ResultPtr& theResult,
 127       const GeomShapePtr& theSubshape,
 128       int theCenterType = (int)ModelAPI_AttributeSelection::NOT_CENTER)
 129   {
 130     SubshapeOfResult aSR;
 131     aSR.myResult = theResult;
 132     aSR.mySubshape = theSubshape;
 133     aSR.myCenterType = theCenterType;
 134     theList.push_back(aSR);
 135   }
 136
 137   static void appendSubshapeOfResult(std::list<SubshapeOfResult>& theList,
 138       const ResultPtr& theResult,
 139       const std::list<GeomShapePtr>& theSubshape)
 140   {
 141     for (std::list<GeomShapePtr>::const_iterator anIt = theSubshape.begin();
 142          anIt != theSubshape.end(); ++anIt) {
 143       SubshapeOfResult aSR;
 144       aSR.myResult = theResult;
 145       aSR.mySubshape = *anIt;
 146       aSR.myCenterType = (int)ModelAPI_AttributeSelection::NOT_CENTER;
 147       theList.push_back(aSR);
 148     }
 149   }
 150
 151   bool findSubshapeByPoint(const std::shared_ptr<ModelAPI_Feature>& theFeature,
 152                            const std::shared_ptr<GeomAPI_Pnt>& thePoint,
 153                            const GeomAPI_Shape::ShapeType& theShapeType,
 154                            std::list<SubshapeOfResult>& theSelected)
 155   {
 156     static const double TOLERANCE = 1.e-6;
 157
 158     theSelected.clear();
 159
 160     const std::list<ResultPtr>& aResults = theFeature->results();
 161     for (std::list<ResultPtr>::const_iterator aResIt = aResults.begin();
 162          aResIt != aResults.end(); ++aResIt) {
 163       bool isSubshapeFound = false;
 164       GeomShapePtr aCurShape = (*aResIt)->shape();
 165       // first of all, check the point is within bounding box of the result
 166       if (!aCurShape || !isPointWithinBB(thePoint, aCurShape, TOLERANCE))
 167         continue;
 168       // now, process all sub-shapes of the given type and check their inner points,
 169       // but skip the case the selected type is COMPOUND and the shape is a list of sketch edges
 170       // (it will be processed later)
 171       std::shared_ptr<GeomAPI_PlanarEdges> aSketchEdges =
 172           std::dynamic_pointer_cast<GeomAPI_PlanarEdges>(aCurShape);
 173       if (theShapeType != GeomAPI_Shape::COMPOUND || !aSketchEdges) {
 174         ResultBodyPtr aCompSolid = std::dynamic_pointer_cast<ModelAPI_ResultBody>(*aResIt);
 175         if (aCompSolid) {
 176           // process solids
 177           int aNbSolids = aCompSolid->numberOfSubs();
 178           for (int i = 0; i < aNbSolids; ++i) {
 179             ResultPtr aSubResult = aCompSolid->subResult(i);
 180             GeomShapePtr aSubSolid = aSubResult->shape();
 181             if (aSubSolid && isPointWithinBB(thePoint, aSubSolid, TOLERANCE)) {
 182               std::list<GeomShapePtr> aSubshapes =
 183                   findSubShape(aSubSolid, theShapeType, thePoint, TOLERANCE);
 184               if (!aSubshapes.empty()) {
 185                 appendSubshapeOfResult(theSelected, aSubResult, aSubshapes);
 186                 isSubshapeFound = true;
 187               }
 188             }
 189           }
 190         }
 191
 192         if (!isSubshapeFound) {
 193           std::list<GeomShapePtr> aSubshapes =
 194               findSubShape(aCurShape, theShapeType, thePoint, TOLERANCE);
 195           if (!aSubshapes.empty()) {
 196             appendSubshapeOfResult(theSelected, *aResIt, aSubshapes);
 197             isSubshapeFound = true;
 198           }
 199         }
 200       }
 201       if (isSubshapeFound)
 202         continue;
 203
 204       // special case for ResultConstruction if the FACE is selected
 205       ResultConstructionPtr aResConstr =
 206           std::dynamic_pointer_cast<ModelAPI_ResultConstruction>(*aResIt);
 207       if (aResConstr && theShapeType >= GeomAPI_Shape::FACE) {
 208         int aNbFaces = aResConstr->facesNum();
 209         for (int aFaceInd = 0; aFaceInd < aNbFaces; ++aFaceInd) {
 210           GeomFacePtr aCurFace = aResConstr->face(aFaceInd);
 211           // check the point is within bounding box of the face
 212           if (!isPointWithinBB(thePoint, aCurFace, TOLERANCE))
 213             continue;
 214           std::list<GeomShapePtr> aSubshapes =
 215               findSubShape(aCurFace, theShapeType, thePoint, TOLERANCE);
 216           if (!aSubshapes.empty()) {
 217             appendSubshapeOfResult(theSelected, *aResIt, aSubshapes);
 218             isSubshapeFound = true;
 219           }
 220         }
 221       }
 222       if (isSubshapeFound)
 223         continue;
 224
 225       // next special case: the full sketch is selected
 226       // the selection type is a COMPOUND
 227       if (aSketchEdges && theShapeType == GeomAPI_Shape::COMPOUND &&
 228           aSketchEdges->middlePoint()->distance(thePoint) < TOLERANCE) {
 229         // select whole result
 230         appendSubshapeOfResult(theSelected, *aResIt, GeomShapePtr());
 231         continue;
 232       }
 233
 234       // another special case: the center of circle or the focus of ellipse is selected;
 235       // return the corresponding edge and a status of the center
 236       if (theShapeType == GeomAPI_Shape::VERTEX) {
 237         int aCenterType;
 238         GeomShapePtr aSubshape = findEdgeByCenter(aCurShape, thePoint, TOLERANCE, aCenterType);
 239         if (aSubshape) {
 240           appendSubshapeOfResult(theSelected, *aResIt, aSubshape, aCenterType);
 241           continue;
 242         }
 243       }
 244     }
 245
 246     // one more special case: the selected entity is a separated sketch point
 247     // or an auxiliary sketch edge; they are not included into the sketch result;
 248     // thus, it is necessary to pass through the sketch sub-features and find selected.
 249     if (theSelected.empty() && !aResults.empty() &&
 250        (theShapeType == GeomAPI_Shape::VERTEX || theShapeType == GeomAPI_Shape::EDGE)) {
 251       CompositeFeaturePtr aCF = std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(theFeature);
 252       std::shared_ptr<GeomAPI_PlanarEdges> aSketchEdges =
 253           std::dynamic_pointer_cast<GeomAPI_PlanarEdges>(aResults.front()->shape());
 254
 255       if (aSketchEdges && aCF) {
 256         int aNbSubs = aCF->numberOfSubs();
 257         for (int aSubInd = 0; aSubInd < aNbSubs; ++aSubInd) {
 258           FeaturePtr aSub = aCF->subFeature(aSubInd);
 259           const std::list<ResultPtr>& aSubResults = aSub->results();
 260           for (std::list<ResultPtr>::const_iterator aSRIt = aSubResults.begin();
 261                aSRIt != aSubResults.end(); ++aSRIt) {
 262             GeomShapePtr aCurShape = (*aSRIt)->shape();
 263             std::list<GeomShapePtr> aSubshapes =
 264                 findSubShape(aCurShape, theShapeType, thePoint, TOLERANCE);
 265             if (!aSubshapes.empty()) {
 266               appendSubshapeOfResult(theSelected, aResults.front(), aSubshapes);
 267               break;
 268             }
 269           }
 270         }
 271       }
 272     }
 273
 274     return !theSelected.empty();
 275   }
 276 } // namespace ModelGeomAlgo_Shape