src/GeomAlgoAPI/GeomAlgoAPI_Fillet1D.cpp

   1 // Copyright (C) 2020  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 <GeomAlgoAPI_Fillet1D.h>
  21
  22 #include <GeomAlgoAPI_Copy.h>
  23 #include <GeomAlgoAPI_MapShapesAndAncestors.h>
  24 #include <GeomAlgoAPI_ShapeTools.h>
  25
  26 #include <GeomAPI_Edge.h>
  27 #include <GeomAPI_Pln.h>
  28 #include <GeomAPI_Pnt.h>
  29 #include <GeomAPI_Wire.h>
  30 #include <GeomAPI_WireExplorer.h>
  31
  32 #include <GEOMImpl_Fillet1d.hxx>
  33
  34 #include <BRep_Builder.hxx>
  35 #include <BRepTools_WireExplorer.hxx>
  36 #include <ShapeFix_Wire.hxx>
  37 #include <TopoDS.hxx>
  38 #include <TopoDS_Wire.hxx>
  39
  40 static GeomShapePtr convert(const TopoDS_Shape& theShape)
  41 {
  42   GeomShapePtr aNewShape(new GeomAPI_Shape);
  43   aNewShape->setImpl<TopoDS_Shape>(new TopoDS_Shape(theShape));
  44   return aNewShape;
  45 }
  46
  47 static void substituteNewEdge(GeomEdgePtr theEdge,
  48     std::map<GeomShapePtr, ListOfShape, GeomAPI_Shape::Comparator>& theMap)
  49 {
  50   std::map<GeomShapePtr, ListOfShape, GeomAPI_Shape::Comparator>::iterator anIt = theMap.begin();
  51   for (; anIt != theMap.end(); ++anIt) {
  52     for (ListOfShape::iterator aEIt = anIt->second.begin(); aEIt != anIt->second.end(); ++aEIt)
  53       if (theEdge->isEqual(*aEIt)) {
  54         // substitute edge and stop iteration
  55         *aEIt = theEdge;
  56         return;
  57       }
  58   }
  59 }
  60
  61
  62 GeomAlgoAPI_Fillet1D::GeomAlgoAPI_Fillet1D(const GeomShapePtr& theBaseWire,
  63                                            const ListOfShape&  theFilletVertices,
  64                                            const double        theFilletRadius)
  65 {
  66   build(theBaseWire, theFilletVertices, theFilletRadius);
  67 }
  68
  69 void GeomAlgoAPI_Fillet1D::build(const GeomShapePtr& theBaseWire,
  70                                  const ListOfShape&  theFilletVertices,
  71                                  const double        theRadius)
  72 {
  73   if (!theBaseWire || theFilletVertices.empty() || theRadius < 0.)
  74     return;
  75
  76   myFailedVertices.clear();
  77   // store all edges of a base wire as modified, because they will be rebuild by ShapeFix
  78   for (GeomAPI_WireExplorer aWExp(theBaseWire->wire()); aWExp.more(); aWExp.next()) {
  79     GeomShapePtr aCurrent = aWExp.current();
  80     GeomAlgoAPI_Copy aCopy(aCurrent);
  81     myModified[aCurrent].push_back(aCopy.shape());
  82   }
  83
  84   GeomAlgoAPI_MapShapesAndAncestors aMapVE(theBaseWire, GeomAPI_Shape::VERTEX,
  85                                                         GeomAPI_Shape::EDGE);
  86
  87   for (ListOfShape::const_iterator aVIt = theFilletVertices.begin();
  88        aVIt != theFilletVertices.end(); ++aVIt) {
  89     // get edges to perform fillet
  90     MapShapeToShapes::const_iterator aVE = aMapVE.map().find(*aVIt);
  91     if (aVE == aMapVE.map().end())
  92       continue;
  93     ListOfShape anEdges;
  94     for (SetOfShapes::const_iterator aEIt = aVE->second.begin();
  95          aEIt != aVE->second.end(); ++aEIt) {
  96       ListOfShape aNewEdges;
  97       modified(*aEIt, aNewEdges);
  98       if (aNewEdges.empty())
  99         anEdges.push_back(*aEIt);
 100       else
 101         anEdges.insert(anEdges.end(), aNewEdges.begin(), aNewEdges.end());
 102     }
 103
 104     GeomPlanePtr aPlane = GeomAlgoAPI_ShapeTools::findPlane(anEdges);
 105     if (!aPlane)
 106       return; // non-planar edges
 107
 108     TopoDS_Edge anEdge1 = TopoDS::Edge(anEdges.front()->impl<TopoDS_Shape>());
 109     TopoDS_Edge anEdge2 = TopoDS::Edge(anEdges.back()->impl<TopoDS_Shape>());
 110
 111     // create fillet builder
 112     GEOMImpl_Fillet1d aFilletBuilder(anEdge1, anEdge2, aPlane->impl<gp_Pln>());
 113     if (!aFilletBuilder.Perform(theRadius)) {
 114       // store the failed vertex and continue
 115       myFailedVertices.push_back(*aVIt);
 116       continue;
 117     }
 118
 119     GeomPointPtr aPoint = aVE->first->vertex()->point();
 120     TopoDS_Edge aFilletEdge = aFilletBuilder.Result(aPoint->impl<gp_Pnt>(), anEdge1, anEdge2);
 121
 122     // store modified shapes
 123     myGenerated[aVE->first].push_back(convert(aFilletEdge));
 124     SetOfShapes::const_iterator aEIt = aVE->second.begin();
 125     myModified[*aEIt].clear();
 126     myModified[*aEIt].push_back(convert(anEdge1));
 127     myModified[*(++aEIt)].clear();
 128     myModified[*aEIt].push_back(convert(anEdge2));
 129   }
 130
 131   // compose a new wire
 132   TopoDS_Wire aNewWire;
 133   BRep_Builder aBuilder;
 134   aBuilder.MakeWire(aNewWire);
 135   GeomWirePtr aBaseWire = theBaseWire->wire();
 136   GeomAPI_WireExplorer aWExp(aBaseWire);
 137   GeomShapePtr aBaseFirstEdge = aWExp.current();
 138   for (; aWExp.more(); aWExp.next()) {
 139     ListOfShape aNewEdges;
 140     modified(aWExp.current(), aNewEdges);
 141     if (aNewEdges.empty())
 142       aNewEdges.push_back(aWExp.current());
 143     for (ListOfShape::iterator anIt = aNewEdges.begin(); anIt != aNewEdges.end(); ++anIt)
 144       aBuilder.Add(aNewWire, TopoDS::Edge((*anIt)->impl<TopoDS_Shape>()));
 145   }
 146   for (MapModified::iterator aGenIt = myGenerated.begin(); aGenIt != myGenerated.end(); ++aGenIt) {
 147     for (ListOfShape::iterator anIt = aGenIt->second.begin(); anIt != aGenIt->second.end(); ++anIt)
 148       aBuilder.Add(aNewWire, TopoDS::Edge((*anIt)->impl<TopoDS_Shape>()));
 149   }
 150   // fix the wire connectivity
 151   ShapeFix_Wire aFixWire;
 152   aFixWire.Load(aNewWire);
 153   aFixWire.ClosedWireMode() = aBaseWire->isClosed();
 154   aFixWire.FixReorder();
 155   aNewWire = aFixWire.WireAPIMake();
 156   if (aNewWire.IsNull()) {
 157     myFailedVertices = theFilletVertices;
 158     return;
 159   }
 160
 161   // update the map of modified shapes, because the edges are changed by ShapeFix
 162   for (BRepTools_WireExplorer anExp(aNewWire); anExp.More(); anExp.Next()) {
 163     GeomEdgePtr aCurrent(new GeomAPI_Edge);
 164     aCurrent->setImpl(new TopoDS_Edge(anExp.Current()));
 165     substituteNewEdge(aCurrent, myGenerated);
 166     substituteNewEdge(aCurrent, myModified);
 167   }
 168
 169   // rebuild the wire once again to get the first edge of fillet wire correspond
 170   // to the first edge of original wire
 171   TopoDS_Edge aFirstEdge = TopoDS::Edge(aBaseFirstEdge->impl<TopoDS_Shape>());
 172   ListOfShape aNewEdges;
 173   modified(aBaseFirstEdge, aNewEdges);
 174   if (!aNewEdges.empty())
 175     aFirstEdge = TopoDS::Edge(aNewEdges.front()->impl<TopoDS_Shape>());
 176   TopTools_ListOfShape aKeptForEnd;
 177   BRepTools_WireExplorer aNewExp(aNewWire);
 178   for (; aNewExp.More(); aNewExp.Next())
 179     if (aNewExp.Current().IsEqual(aFirstEdge))
 180       break;
 181   if (aNewExp.More()) {
 182     TopoDS_Wire aReorderedWire;
 183     aBuilder.MakeWire(aReorderedWire);
 184     for (; aNewExp.More(); aNewExp.Next())
 185       aBuilder.Add(aReorderedWire, aNewExp.Current());
 186     for (aNewExp.Init(aNewWire); aNewExp.More(); aNewExp.Next()) {
 187       if (aNewExp.Current().IsEqual(aFirstEdge))
 188         break;
 189       aBuilder.Add(aReorderedWire, aNewExp.Current());
 190     }
 191     aNewWire = aReorderedWire;
 192   }
 193
 194   std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
 195   aShape->setImpl(new TopoDS_Shape(aNewWire));
 196   myModified[theBaseWire].push_back(aShape);
 197
 198   setShape(aShape);
 199   setDone(myFailedVertices.empty());
 200 }
 201
 202 void GeomAlgoAPI_Fillet1D::generated(const GeomShapePtr theOldShape,
 203                                      ListOfShape& theNewShapes)
 204 {
 205   MapModified::iterator aFound = myGenerated.find(theOldShape);
 206   if (aFound != myGenerated.end())
 207     theNewShapes = aFound->second;
 208 }
 209
 210 void GeomAlgoAPI_Fillet1D::modified(const GeomShapePtr theOldShape,
 211                                      ListOfShape& theNewShapes)
 212 {
 213   MapModified::iterator aFound = myModified.find(theOldShape);
 214   if (aFound != myModified.end())
 215     theNewShapes = aFound->second;
 216 }