src/GEOMAlgo/BlockFix_UnionEdges.cxx

   1 // File:      BlockFix_UnionEdges.cxx
   2 // Created:   07.12.04 15:27:30
   3 // Author:    Sergey KUUL
   4
   5
   6 #include <BlockFix_UnionEdges.ixx>
   7
   8 #include <Approx_Curve3d.hxx>
   9 #include <BRepAdaptor_HCompCurve.hxx>
  10 #include <BRep_Builder.hxx>
  11 #include <BRep_Tool.hxx>
  12 #include <GC_MakeCircle.hxx>
  13 #include <Geom_BSplineCurve.hxx>
  14 #include <Geom_Circle.hxx>
  15 #include <Geom_Curve.hxx>
  16 #include <Geom_Line.hxx>
  17 #include <Geom_TrimmedCurve.hxx>
  18 #include <ShapeAnalysis_Edge.hxx>
  19 #include <ShapeFix_Edge.hxx>
  20 #include <ShapeFix_Face.hxx>
  21 #include <TColgp_SequenceOfPnt.hxx>
  22 #include <TColStd_MapOfInteger.hxx>
  23 #include <TopExp.hxx>
  24 #include <TopExp_Explorer.hxx>
  25 #include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
  26 #include <TopTools_IndexedMapOfShape.hxx>
  27 #include <TopTools_ListOfShape.hxx>
  28 #include <TopTools_MapOfShape.hxx>
  29 #include <TopTools_ListIteratorOfListOfShape.hxx>
  30 #include <TopTools_SequenceOfShape.hxx>
  31 #include <TopoDS.hxx>
  32 #include <TopoDS_Edge.hxx>
  33 #include <TopoDS_Face.hxx>
  34 #include <TopoDS_Solid.hxx>
  35 #include <TopoDS_Vertex.hxx>
  36 #include <TopoDS_Iterator.hxx>
  37
  38
  39 //=======================================================================
  40 //function : BlockFix_UnionEdges()
  41 //purpose  : Constructor
  42 //=======================================================================
  43
  44 BlockFix_UnionEdges::BlockFix_UnionEdges (  )
  45 {
  46 }
  47
  48
  49 //=======================================================================
  50 //function : MergeEdges
  51 //purpose  : auxilary
  52 //=======================================================================
  53 static Standard_Boolean MergeEdges(const TopTools_SequenceOfShape& SeqEdges,
  54                                    const TopoDS_Face& aFace,
  55                                    const Standard_Real Tol,
  56                                    TopoDS_Edge& anEdge)
  57 {
  58   // make chain for union
  59   BRep_Builder B;
  60   ShapeAnalysis_Edge sae;
  61   TopoDS_Edge FirstE = TopoDS::Edge(SeqEdges.Value(1));
  62   TopoDS_Edge LastE = FirstE;
  63   TopoDS_Vertex VF = sae.FirstVertex(FirstE);
  64   TopoDS_Vertex VL = sae.LastVertex(LastE);
  65   TopTools_SequenceOfShape aChain;
  66   aChain.Append(FirstE);
  67   TColStd_MapOfInteger IndUsedEdges;
  68   IndUsedEdges.Add(1);
  69   Standard_Integer j;
  70   for (j = 2; j <= SeqEdges.Length(); j++) {
  71     for(Standard_Integer k=2; k<=SeqEdges.Length(); k++) {
  72       if(IndUsedEdges.Contains(k)) continue;
  73       TopoDS_Edge edge = TopoDS::Edge(SeqEdges.Value(k));
  74       TopoDS_Vertex VF2 = sae.FirstVertex(edge);
  75       TopoDS_Vertex VL2 = sae.LastVertex(edge);
  76       if(sae.FirstVertex(edge).IsSame(VL)) {
  77         aChain.Append(edge);
  78         LastE = edge;
  79         VL = sae.LastVertex(LastE);
  80         IndUsedEdges.Add(k);
  81       }
  82       else if(sae.LastVertex(edge).IsSame(VF)) {
  83         aChain.Prepend(edge);
  84         FirstE = edge;
  85         VF = sae.FirstVertex(FirstE);
  86         IndUsedEdges.Add(k);
  87       }
  88     }
  89   }
  90   if(aChain.Length()<SeqEdges.Length()) {
  91     cout<<"can not create correct chain..."<<endl;
  92     return Standard_False;
  93   }
  94   // union edges in chain
  95   // first step: union lines and circles
  96   TopLoc_Location Loc;
  97   Standard_Real fp1,lp1,fp2,lp2;
  98   for (j = 1; j < aChain.Length(); j++) {
  99     TopoDS_Edge edge1 = TopoDS::Edge(aChain.Value(j));
 100     Handle(Geom_Curve) c3d1 = BRep_Tool::Curve(edge1,Loc,fp1,lp1);
 101     if(c3d1.IsNull()) break;
 102     while(c3d1->IsKind(STANDARD_TYPE(Geom_TrimmedCurve))) {
 103       Handle(Geom_TrimmedCurve) tc =
 104         Handle(Geom_TrimmedCurve)::DownCast(c3d1);
 105       c3d1 = tc->BasisCurve();
 106     }
 107     TopoDS_Edge edge2 = TopoDS::Edge(aChain.Value(j+1));
 108     Handle(Geom_Curve) c3d2 = BRep_Tool::Curve(edge2,Loc,fp2,lp2);
 109     if(c3d2.IsNull()) break;
 110     while(c3d2->IsKind(STANDARD_TYPE(Geom_TrimmedCurve))) {
 111       Handle(Geom_TrimmedCurve) tc =
 112         Handle(Geom_TrimmedCurve)::DownCast(c3d2);
 113       c3d2 = tc->BasisCurve();
 114     }
 115     if( c3d1->IsKind(STANDARD_TYPE(Geom_Line)) && c3d2->IsKind(STANDARD_TYPE(Geom_Line)) ) {
 116       Handle(Geom_Line) L1 = Handle(Geom_Line)::DownCast(c3d1);
 117       Handle(Geom_Line) L2 = Handle(Geom_Line)::DownCast(c3d2);
 118       gp_Dir Dir1 = L1->Position().Direction();
 119       gp_Dir Dir2 = L2->Position().Direction();
 120       if(!Dir1.IsEqual(Dir2,Precision::Angular())) continue;
 121       // can union lines => create new edge
 122       TopoDS_Vertex V1 = sae.FirstVertex(edge1);
 123       gp_Pnt PV1 = BRep_Tool::Pnt(V1);
 124       TopoDS_Vertex V2 = sae.LastVertex(edge2);
 125       gp_Pnt PV2 = BRep_Tool::Pnt(V2);
 126       gp_Vec Vec(PV1,PV2);
 127       Handle(Geom_Line) L = new Geom_Line(gp_Ax1(PV1,Vec));
 128       Standard_Real dist = PV1.Distance(PV2);
 129       Handle(Geom_TrimmedCurve) tc = new Geom_TrimmedCurve(L,0.0,dist);
 130       TopoDS_Edge E;
 131       B.MakeEdge (E,tc,Precision::Confusion());
 132       B.Add (E,V1);  B.Add (E,V2);
 133       B.UpdateVertex(V1, 0., E, 0.);
 134       B.UpdateVertex(V2, dist, E, 0.);
 135       ShapeFix_Edge sfe;
 136       sfe.FixAddPCurve(E,aFace,Standard_False);
 137       sfe.FixSameParameter(E);
 138       aChain.Remove(j);
 139       aChain.SetValue(j,E);
 140       j--;
 141     }
 142     if( c3d1->IsKind(STANDARD_TYPE(Geom_Circle)) && c3d2->IsKind(STANDARD_TYPE(Geom_Circle)) ) {
 143       Handle(Geom_Circle) C1 = Handle(Geom_Circle)::DownCast(c3d1);
 144       Handle(Geom_Circle) C2 = Handle(Geom_Circle)::DownCast(c3d2);
 145       gp_Pnt P01 = C1->Location();
 146       gp_Pnt P02 = C2->Location();
 147       if(P01.Distance(P02)>Precision::Confusion()) continue;
 148       // can union circles => create new edge
 149       TopoDS_Vertex V1 = sae.FirstVertex(edge1);
 150       gp_Pnt PV1 = BRep_Tool::Pnt(V1);
 151       TopoDS_Vertex V2 = sae.LastVertex(edge2);
 152       gp_Pnt PV2 = BRep_Tool::Pnt(V2);
 153       TopoDS_Vertex VM = sae.LastVertex(edge1);
 154       gp_Pnt PVM = BRep_Tool::Pnt(VM);
 155       GC_MakeCircle MC(PV1,PVM,PV2);
 156       Handle(Geom_Circle) C = MC.Value();
 157       gp_Pnt P0 = C->Location();
 158       gp_Dir D1(gp_Vec(P0,PV1));
 159       gp_Dir D2(gp_Vec(P0,PV2));
 160       Standard_Real fpar = C->XAxis().Direction().Angle(D1);
 161       Standard_Real lpar = C->XAxis().Direction().Angle(D2);
 162       Handle(Geom_TrimmedCurve) tc = new Geom_TrimmedCurve(C,fpar,lpar);
 163       TopoDS_Edge E;
 164       B.MakeEdge (E,tc,Precision::Confusion());
 165       B.Add (E,V1);  B.Add (E,V2);
 166       B.UpdateVertex(V1, fpar, E, 0.);
 167       B.UpdateVertex(V2, lpar, E, 0.);
 168       ShapeFix_Edge sfe;
 169       sfe.FixAddPCurve(E,aFace,Standard_False);
 170       sfe.FixSameParameter(E);
 171       aChain.Remove(j);
 172       aChain.SetValue(j,E);
 173       j--;
 174     }
 175   }
 176   if(j<aChain.Length()) {
 177     cout<<"null curve3d in edge..."<<endl;
 178     return Standard_False;
 179   }
 180   if(aChain.Length()>1) {
 181     // second step: union edges with various curves
 182     cout<<"can not make analitical union => make approximation"<<endl;
 183     TopoDS_Wire W;
 184     B.MakeWire(W);
 185     for(j=1; j<=aChain.Length(); j++) {
 186       TopoDS_Edge edge = TopoDS::Edge(aChain.Value(j));
 187       B.Add(W,edge);
 188     }
 189     Handle(BRepAdaptor_HCompCurve) Adapt = new BRepAdaptor_HCompCurve(W);
 190     Approx_Curve3d Conv(Adapt,Tol,GeomAbs_C1,9,1000);
 191     Handle(Geom_BSplineCurve) bc = Conv.Curve();
 192     TopoDS_Edge E;
 193     B.MakeEdge (E,bc,Precision::Confusion());
 194     B.Add (E,VF);
 195     B.Add (E,VL);
 196     //TopLoc_Location L;
 197     //Handle(Geom_Surface) aSurf = BRep_Tool::Surface(aFace,L);
 198     //ShapeFix_Edge sfe;
 199     //if(!L.IsIdentity()) {
 200     //  TopoDS_Edge aPCEdge = TopoDS::Edge(E.Moved(L.Inverted()));
 201     //  sfe.FixAddPCurve(aPCEdge,aFace,Standard_False);
 202     //  Handle(Geom2d_Curve) c2d;
 203     //  Standard_Real fp,lp;
 204     //  sae.PCurve(aPCEdge,aFace,c2d,fp,lp);
 205     //  B.UpdateEdge(E,c2d,aFace,0.);
 206     //  B.Range(E,aFace,fp,lp);
 207     //  c2d.Nullify();
 208     //  B.UpdateEdge(aPCEdge,c2d,aFace,0.);
 209     //  E = aPCEdge;
 210     //}
 211     //else {
 212     //  sfe.FixAddPCurve(E,aFace,Standard_False);
 213     //}
 214     //sfe.FixSameParameter(E);
 215     aChain.SetValue(1,E);
 216   }
 217
 218   anEdge = TopoDS::Edge(aChain.Value(1));
 219   return Standard_True;
 220 }
 221
 222
 223 //=======================================================================
 224 //function : Perform
 225 //purpose  :
 226 //=======================================================================
 227
 228 TopoDS_Shape BlockFix_UnionEdges::Perform(const TopoDS_Shape& Shape,
 229                                           const Standard_Real Tol)
 230 {
 231   myContext = new ShapeBuild_ReShape;
 232   myTolerance = Tol;
 233   TopoDS_Shape aResult = myContext->Apply(Shape);
 234
 235   TopTools_IndexedMapOfShape ChangedFaces;
 236
 237   // processing each solid
 238   TopExp_Explorer exps;
 239   for(exps.Init(Shape, TopAbs_SOLID); exps.More(); exps.Next()) {
 240     TopoDS_Solid aSolid = TopoDS::Solid(exps.Current());
 241
 242     // creating map of edge faces
 243     TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces;
 244     TopExp::MapShapesAndAncestors(aSolid, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces);
 245
 246     // processing each face
 247     TopExp_Explorer exp;
 248     for(exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 249       TopoDS_Face aFace = TopoDS::Face(myContext->Apply(exp.Current().Oriented(TopAbs_FORWARD)));
 250       TopTools_IndexedDataMapOfShapeListOfShape aMapFacesEdges;
 251
 252       for(TopExp_Explorer expe(aFace,TopAbs_EDGE); expe.More(); expe.Next()) {
 253         TopoDS_Edge edge = TopoDS::Edge(expe.Current());
 254         if(!aMapEdgeFaces.Contains(edge)) continue;
 255         const TopTools_ListOfShape& aList = aMapEdgeFaces.FindFromKey(edge);
 256         TopTools_ListIteratorOfListOfShape anIter(aList);
 257         for( ; anIter.More(); anIter.Next()) {
 258           TopoDS_Face face = TopoDS::Face(anIter.Value());
 259           TopoDS_Face face1 = TopoDS::Face(myContext->Apply(anIter.Value()));
 260           if(face1.IsSame(aFace)) continue;
 261           if(aMapFacesEdges.Contains(face)) {
 262             aMapFacesEdges.ChangeFromKey(face).Append(edge);
 263           }
 264           else {
 265             TopTools_ListOfShape ListEdges;
 266             ListEdges.Append(edge);
 267             aMapFacesEdges.Add(face,ListEdges);
 268           }
 269         }
 270       }
 271
 272       for(Standard_Integer i=1; i<=aMapFacesEdges.Extent(); i++) {
 273         const TopTools_ListOfShape& ListEdges = aMapFacesEdges.FindFromIndex(i);
 274         TopTools_SequenceOfShape SeqEdges;
 275         TopTools_ListIteratorOfListOfShape anIter(ListEdges);
 276         for( ; anIter.More(); anIter.Next()) {
 277           SeqEdges.Append(anIter.Value());
 278         }
 279         if(SeqEdges.Length()==1) continue;
 280         TopoDS_Edge E;
 281         if( MergeEdges(SeqEdges,aFace,Tol,E) ) {
 282           // now we have only one edge - aChain.Value(1)
 283           // we have to replace old ListEdges with this new edge
 284           myContext->Replace(SeqEdges(1),E);
 285           for(Standard_Integer j=2; j<=SeqEdges.Length(); j++) {
 286             myContext->Remove(SeqEdges(j));
 287           }
 288           TopoDS_Face tmpF = TopoDS::Face(exp.Current());
 289           if( !ChangedFaces.Contains(tmpF) )
 290             ChangedFaces.Add(tmpF);
 291           tmpF = TopoDS::Face(aMapFacesEdges.FindKey(i));
 292           if( !ChangedFaces.Contains(tmpF) )
 293             ChangedFaces.Add(tmpF);
 294         }
 295       }
 296
 297     } // end processing each face
 298
 299   } // end processing each solid
 300
 301   for(Standard_Integer i=1; i<=ChangedFaces.Extent(); i++) {
 302     TopoDS_Face aFace = TopoDS::Face(myContext->Apply(ChangedFaces.FindKey(i)));
 303     Handle(ShapeFix_Face) sff = new ShapeFix_Face(aFace);
 304     sff->SetContext(myContext);
 305     sff->SetPrecision(myTolerance);
 306     sff->SetMinTolerance(myTolerance);
 307     sff->SetMaxTolerance(Max(1.,myTolerance*1000.));
 308     sff->Perform();
 309     //Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire;
 310     //sfw->SetContext(myContext);
 311     //sfw->SetPrecision(myTolerance);
 312     //sfw->SetMinTolerance(myTolerance);
 313     //sfw->SetMaxTolerance(Max(1.,myTolerance*1000.));
 314     //sfw->SetFace(aFace);
 315     //for ( TopoDS_Iterator iter(aFace,Standard_False); iter.More(); iter.Next()) {
 316     //  TopoDS_Wire wire = TopoDS::Wire ( iter.Value() );
 317     //  sfw->Load(wire);
 318     //  sfw->FixReorder();
 319     //  sfw->FixShifted();
 320     //}
 321   }
 322
 323   aResult = myContext->Apply(Shape);
 324   return aResult;
 325 }