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   // store all edges of a base wire as modified, because they will be rebuild by ShapeFix
  77   for (GeomAPI_WireExplorer aWExp(theBaseWire->wire()); aWExp.more(); aWExp.next()) {
  78     GeomShapePtr aCurrent = aWExp.current();
  79     GeomAlgoAPI_Copy aCopy(aCurrent);
  80     myModified[aCurrent].push_back(aCopy.shape());
  81   }
  82
  83   GeomAlgoAPI_MapShapesAndAncestors aMapVE(theBaseWire, GeomAPI_Shape::VERTEX,
  84                                                         GeomAPI_Shape::EDGE);
  85
  86   for (ListOfShape::const_iterator aVIt = theFilletVertices.begin();
  87        aVIt != theFilletVertices.end(); ++aVIt) {
  88     // get edges to perform fillet
  89     MapShapeToShapes::const_iterator aVE = aMapVE.map().find(*aVIt);
  90     if (aVE == aMapVE.map().end())
  91       continue;
  92     ListOfShape anEdges;
  93     for (SetOfShapes::const_iterator aEIt = aVE->second.begin();
  94          aEIt != aVE->second.end(); ++aEIt) {
  95       ListOfShape aNewEdges;
  96       modified(*aEIt, aNewEdges);
  97       if (aNewEdges.empty())
  98         anEdges.push_back(*aEIt);
  99       else
 100         anEdges.insert(anEdges.end(), aNewEdges.begin(), aNewEdges.end());
 101     }
 102
 103     GeomPlanePtr aPlane = GeomAlgoAPI_ShapeTools::findPlane(anEdges);
 104     if (!aPlane)
 105       return; // non-planar edges
 106
 107     TopoDS_Edge anEdge1 = TopoDS::Edge(anEdges.front()->impl<TopoDS_Shape>());
 108     TopoDS_Edge anEdge2 = TopoDS::Edge(anEdges.back()->impl<TopoDS_Shape>());
 109
 110     // create fillet builder
 111     GEOMImpl_Fillet1d aFilletBuilder(anEdge1, anEdge2, aPlane->impl<gp_Pln>());
 112     if (!aFilletBuilder.Perform(theRadius))
 113       return; // fillet is failed, no way to continue
 114
 115     GeomPointPtr aPoint = aVE->first->vertex()->point();
 116     TopoDS_Edge aFilletEdge = aFilletBuilder.Result(aPoint->impl<gp_Pnt>(), anEdge1, anEdge2);
 117
 118     // store modified shapes
 119     myGenerated[aVE->first].push_back(convert(aFilletEdge));
 120     SetOfShapes::const_iterator aEIt = aVE->second.begin();
 121     myModified[*aEIt].clear();
 122     myModified[*aEIt].push_back(convert(anEdge1));
 123     myModified[*(++aEIt)].clear();
 124     myModified[*aEIt].push_back(convert(anEdge2));
 125   }
 126
 127   // compose a new wire
 128   TopoDS_Wire aNewWire;
 129   BRep_Builder aBuilder;
 130   aBuilder.MakeWire(aNewWire);
 131   GeomWirePtr aBaseWire = theBaseWire->wire();
 132   GeomAPI_WireExplorer aWExp(aBaseWire);
 133   GeomShapePtr aBaseFirstEdge = aWExp.current();
 134   for (; aWExp.more(); aWExp.next()) {
 135     ListOfShape aNewEdges;
 136     modified(aWExp.current(), aNewEdges);
 137     if (aNewEdges.empty())
 138       aNewEdges.push_back(aWExp.current());
 139     for (ListOfShape::iterator anIt = aNewEdges.begin(); anIt != aNewEdges.end(); ++anIt)
 140       aBuilder.Add(aNewWire, TopoDS::Edge((*anIt)->impl<TopoDS_Shape>()));
 141   }
 142   for (MapModified::iterator aGenIt = myGenerated.begin(); aGenIt != myGenerated.end(); ++aGenIt) {
 143     for (ListOfShape::iterator anIt = aGenIt->second.begin(); anIt != aGenIt->second.end(); ++anIt)
 144       aBuilder.Add(aNewWire, TopoDS::Edge((*anIt)->impl<TopoDS_Shape>()));
 145   }
 146   // fix the wire connectivity
 147   ShapeFix_Wire aFixWire;
 148   aFixWire.Load(aNewWire);
 149   aFixWire.ClosedWireMode() = aBaseWire->isClosed();
 150   aFixWire.FixReorder();
 151   aNewWire = aFixWire.WireAPIMake();
 152   if (aNewWire.IsNull())
 153     return;
 154
 155   // update the map of modified shapes, because the edges are changed by ShapeFix
 156   for (BRepTools_WireExplorer anExp(aNewWire); anExp.More(); anExp.Next()) {
 157     GeomEdgePtr aCurrent(new GeomAPI_Edge);
 158     aCurrent->setImpl(new TopoDS_Edge(anExp.Current()));
 159     substituteNewEdge(aCurrent, myGenerated);
 160     substituteNewEdge(aCurrent, myModified);
 161   }
 162
 163   // rebuild the wire once again to get the first edge of fillet wire correspond
 164   // to the first edge of original wire
 165   TopoDS_Edge aFirstEdge = TopoDS::Edge(aBaseFirstEdge->impl<TopoDS_Shape>());
 166   ListOfShape aNewEdges;
 167   modified(aBaseFirstEdge, aNewEdges);
 168   if (!aNewEdges.empty())
 169     aFirstEdge = TopoDS::Edge(aNewEdges.front()->impl<TopoDS_Shape>());
 170   TopTools_ListOfShape aKeptForEnd;
 171   BRepTools_WireExplorer aNewExp(aNewWire);
 172   for (; aNewExp.More(); aNewExp.Next())
 173     if (aNewExp.Current().IsEqual(aFirstEdge))
 174       break;
 175   if (aNewExp.More()) {
 176     TopoDS_Wire aReorderedWire;
 177     aBuilder.MakeWire(aReorderedWire);
 178     for (; aNewExp.More(); aNewExp.Next())
 179       aBuilder.Add(aReorderedWire, aNewExp.Current());
 180     for (aNewExp.Init(aNewWire); aNewExp.More(); aNewExp.Next()) {
 181       if (aNewExp.Current().IsEqual(aFirstEdge))
 182         break;
 183       aBuilder.Add(aReorderedWire, aNewExp.Current());
 184     }
 185     aNewWire = aReorderedWire;
 186   }
 187
 188   std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
 189   aShape->setImpl(new TopoDS_Shape(aNewWire));
 190   myModified[theBaseWire].push_back(aShape);
 191
 192   setShape(aShape);
 193   setDone(true);
 194 }
 195
 196 void GeomAlgoAPI_Fillet1D::generated(const GeomShapePtr theOldShape,
 197                                      ListOfShape& theNewShapes)
 198 {
 199   MapModified::iterator aFound = myGenerated.find(theOldShape);
 200   if (aFound != myGenerated.end())
 201     theNewShapes = aFound->second;
 202 }
 203
 204 void GeomAlgoAPI_Fillet1D::modified(const GeomShapePtr theOldShape,
 205                                      ListOfShape& theNewShapes)
 206 {
 207   MapModified::iterator aFound = myModified.find(theOldShape);
 208   if (aFound != myModified.end())
 209     theNewShapes = aFound->second;
 210 }