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 #include <GeomAlgoAPI_MapShapesAndAncestors.h>
  22 #include <GeomAlgoAPI_ShapeTools.h>
  23
  24 #include <GeomAPI_Edge.h>
  25 #include <GeomAPI_Pln.h>
  26 #include <GeomAPI_Pnt.h>
  27 #include <GeomAPI_Wire.h>
  28 #include <GeomAPI_WireExplorer.h>
  29
  30 #include <GEOMImpl_Fillet1d.hxx>
  31
  32 #include <BRep_Builder.hxx>
  33 #include <BRepTools_WireExplorer.hxx>
  34 #include <ShapeFix_Wire.hxx>
  35 #include <TopoDS.hxx>
  36 #include <TopoDS_Wire.hxx>
  37
  38 static GeomShapePtr convert(const TopoDS_Shape& theShape)
  39 {
  40   GeomShapePtr aNewShape(new GeomAPI_Shape);
  41   aNewShape->setImpl<TopoDS_Shape>(new TopoDS_Shape(theShape));
  42   return aNewShape;
  43 }
  44
  45 static void substituteNewEdge(GeomEdgePtr theEdge,
  46     std::map<GeomShapePtr, ListOfShape, GeomAPI_Shape::Comparator>& theMap)
  47 {
  48   std::map<GeomShapePtr, ListOfShape, GeomAPI_Shape::Comparator>::iterator anIt = theMap.begin();
  49   for (; anIt != theMap.end(); ++anIt) {
  50     for (ListOfShape::iterator aEIt = anIt->second.begin(); aEIt != anIt->second.end(); ++aEIt)
  51       if (theEdge->isEqual(*aEIt)) {
  52         // substitute edge and stop iteration
  53         *aEIt = theEdge;
  54         return;
  55       }
  56   }
  57 }
  58
  59
  60 GeomAlgoAPI_Fillet1D::GeomAlgoAPI_Fillet1D(const GeomShapePtr& theBaseWire,
  61                                            const ListOfShape&  theFilletVertices,
  62                                            const double        theFilletRadius)
  63 {
  64   build(theBaseWire, theFilletVertices, theFilletRadius);
  65 }
  66
  67 void GeomAlgoAPI_Fillet1D::build(const GeomShapePtr& theBaseWire,
  68                                  const ListOfShape&  theFilletVertices,
  69                                  const double        theRadius)
  70 {
  71   if (!theBaseWire || theFilletVertices.empty() || theRadius < 0.)
  72     return;
  73
  74   GeomAlgoAPI_MapShapesAndAncestors aMapVE(theBaseWire, GeomAPI_Shape::VERTEX,
  75                                                         GeomAPI_Shape::EDGE);
  76
  77   for (ListOfShape::const_iterator aVIt = theFilletVertices.begin();
  78        aVIt != theFilletVertices.end(); ++aVIt) {
  79     // get edges to perform fillet
  80     MapShapeToShapes::const_iterator aVE = aMapVE.map().find(*aVIt);
  81     if (aVE == aMapVE.map().end())
  82       continue;
  83     ListOfShape anEdges;
  84     for (SetOfShapes::const_iterator aEIt = aVE->second.begin();
  85          aEIt != aVE->second.end(); ++aEIt) {
  86       ListOfShape aNewEdges;
  87       modified(*aEIt, aNewEdges);
  88       if (aNewEdges.empty())
  89         anEdges.push_back(*aEIt);
  90       else
  91         anEdges.insert(anEdges.end(), aNewEdges.begin(), aNewEdges.end());
  92     }
  93
  94     GeomPlanePtr aPlane = GeomAlgoAPI_ShapeTools::findPlane(anEdges);
  95     if (!aPlane)
  96       return; // non-planar edges
  97
  98     TopoDS_Edge anEdge1 = TopoDS::Edge(anEdges.front()->impl<TopoDS_Shape>());
  99     TopoDS_Edge anEdge2 = TopoDS::Edge(anEdges.back()->impl<TopoDS_Shape>());
 100
 101     // create fillet builder
 102     GEOMImpl_Fillet1d aFilletBuilder(anEdge1, anEdge2, aPlane->impl<gp_Pln>());
 103     if (!aFilletBuilder.Perform(theRadius))
 104       return; // fillet is failed, no way to continue
 105
 106     GeomPointPtr aPoint = aVE->first->vertex()->point();
 107     TopoDS_Edge aFilletEdge = aFilletBuilder.Result(aPoint->impl<gp_Pnt>(), anEdge1, anEdge2);
 108
 109     // store modified shapes
 110     myGenerated[aVE->first].push_back(convert(aFilletEdge));
 111     SetOfShapes::const_iterator aEIt = aVE->second.begin();
 112     myModified[*aEIt].clear();
 113     myModified[*aEIt].push_back(convert(anEdge1));
 114     myModified[*(++aEIt)].clear();
 115     myModified[*aEIt].push_back(convert(anEdge2));
 116   }
 117
 118   // compose a new wire
 119   TopoDS_Wire aNewWire;
 120   BRep_Builder aBuilder;
 121   aBuilder.MakeWire(aNewWire);
 122   GeomWirePtr aBaseWire = theBaseWire->wire();
 123   GeomAPI_WireExplorer aWExp(aBaseWire);
 124   GeomShapePtr aBaseFirstEdge = aWExp.current();
 125   for (; aWExp.more(); aWExp.next()) {
 126     ListOfShape aNewEdges;
 127     modified(aWExp.current(), aNewEdges);
 128     if (aNewEdges.empty())
 129       aNewEdges.push_back(aWExp.current());
 130     for (ListOfShape::iterator anIt = aNewEdges.begin(); anIt != aNewEdges.end(); ++anIt)
 131       aBuilder.Add(aNewWire, TopoDS::Edge((*anIt)->impl<TopoDS_Shape>()));
 132   }
 133   for (MapModified::iterator aGenIt = myGenerated.begin(); aGenIt != myGenerated.end(); ++aGenIt) {
 134     for (ListOfShape::iterator anIt = aGenIt->second.begin(); anIt != aGenIt->second.end(); ++anIt)
 135       aBuilder.Add(aNewWire, TopoDS::Edge((*anIt)->impl<TopoDS_Shape>()));
 136   }
 137   // fix the wire connectivity
 138   ShapeFix_Wire aFixWire;
 139   aFixWire.Load(aNewWire);
 140   aFixWire.ClosedWireMode() = aBaseWire->isClosed();
 141   aFixWire.FixReorder();
 142   aNewWire = aFixWire.WireAPIMake();
 143   if (aNewWire.IsNull())
 144     return;
 145
 146   // update the map of modified shapes, because the edges are changed by ShapeFix
 147   for (BRepTools_WireExplorer anExp(aNewWire); anExp.More(); anExp.Next()) {
 148     GeomEdgePtr aCurrent(new GeomAPI_Edge);
 149     aCurrent->setImpl(new TopoDS_Edge(anExp.Current()));
 150     substituteNewEdge(aCurrent, myGenerated);
 151     substituteNewEdge(aCurrent, myModified);
 152   }
 153
 154   // rebuild the wire once again to get the first edge of fillet wire correspond
 155   // to the first edge of original wire
 156   TopoDS_Edge aFirstEdge = TopoDS::Edge(aBaseFirstEdge->impl<TopoDS_Shape>());
 157   ListOfShape aNewEdges;
 158   modified(aBaseFirstEdge, aNewEdges);
 159   if (!aNewEdges.empty())
 160     aFirstEdge = TopoDS::Edge(aNewEdges.front()->impl<TopoDS_Shape>());
 161   TopTools_ListOfShape aKeptForEnd;
 162   BRepTools_WireExplorer aNewExp(aNewWire);
 163   for (; aNewExp.More(); aNewExp.Next())
 164     if (aNewExp.Current().IsEqual(aFirstEdge))
 165       break;
 166   if (aNewExp.More()) {
 167     TopoDS_Wire aReorderedWire;
 168     aBuilder.MakeWire(aReorderedWire);
 169     for (; aNewExp.More(); aNewExp.Next())
 170       aBuilder.Add(aReorderedWire, aNewExp.Current());
 171     for (aNewExp.Init(aNewWire); aNewExp.More(); aNewExp.Next()) {
 172       if (aNewExp.Current().IsEqual(aFirstEdge))
 173         break;
 174       aBuilder.Add(aReorderedWire, aNewExp.Current());
 175     }
 176     aNewWire = aReorderedWire;
 177   }
 178
 179   std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
 180   aShape->setImpl(new TopoDS_Shape(aNewWire));
 181   myModified[theBaseWire].push_back(aShape);
 182
 183   setShape(aShape);
 184   setDone(true);
 185 }
 186
 187 void GeomAlgoAPI_Fillet1D::generated(const GeomShapePtr theOldShape,
 188                                      ListOfShape& theNewShapes)
 189 {
 190   MapModified::iterator aFound = myGenerated.find(theOldShape);
 191   if (aFound != myGenerated.end())
 192     theNewShapes = aFound->second;
 193 }
 194
 195 void GeomAlgoAPI_Fillet1D::modified(const GeomShapePtr theOldShape,
 196                                      ListOfShape& theNewShapes)
 197 {
 198   MapModified::iterator aFound = myModified.find(theOldShape);
 199   if (aFound != myModified.end())
 200     theNewShapes = aFound->second;
 201 }