src/GeomAlgoAPI/GeomAlgoAPI_STEPImport.cpp

   1 // Copyright (C) 2014-2019  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_STEPImport.h>
  21
  22 #include <TDF_ChildIDIterator.hxx>
  23 #include <TDF_Label.hxx>
  24 #include <TDataStd_Name.hxx>
  25 #include <TDataStd_Comment.hxx>
  26 #include <TNaming_Builder.hxx>
  27 #include <TNaming_NamedShape.hxx>
  28
  29 #include <IFSelect_ReturnStatus.hxx>
  30 #include <Interface_EntityIterator.hxx>
  31 #include <Interface_Graph.hxx>
  32 #include <Interface_InterfaceModel.hxx>
  33 #include <Interface_Static.hxx>
  34 #include <STEPControl_Reader.hxx>
  35 #include <StepBasic_Product.hxx>
  36 #include <StepBasic_ProductDefinition.hxx>
  37 #include <StepBasic_ProductDefinitionFormation.hxx>
  38 #include <StepGeom_GeometricRepresentationItem.hxx>
  39 #include <StepShape_TopologicalRepresentationItem.hxx>
  40 #include <StepRepr_DescriptiveRepresentationItem.hxx>
  41 #include <StepRepr_ProductDefinitionShape.hxx>
  42 #include <StepRepr_PropertyDefinitionRepresentation.hxx>
  43 #include <StepRepr_Representation.hxx>
  44 #include <TransferBRep.hxx>
  45 #include <Transfer_Binder.hxx>
  46 #include <Transfer_TransientProcess.hxx>
  47 #include <XSControl_TransferReader.hxx>
  48 #include <XSControl_WorkSession.hxx>
  49
  50 #include <BRep_Builder.hxx>
  51
  52 #include <TopExp.hxx>
  53 #include <TopExp_Explorer.hxx>
  54 #include <TopTools_IndexedMapOfShape.hxx>
  55 #include <TopoDS_Compound.hxx>
  56 #include <TopoDS_Iterator.hxx>
  57 #include <TopoDS_Shape.hxx>
  58
  59
  60 #include <TColStd_SequenceOfAsciiString.hxx>
  61
  62 #include <Standard_Failure.hxx>
  63 #include <Standard_ErrorHandler.hxx> // CAREFUL ! position of this file is critic : see Lucien PIGNOLONI / OCC
  64 std::shared_ptr<GeomAPI_Shape> STEPImport(const std::string& theFileName,
  65                                           const std::string& theFormatName,
  66                                           std::string& theError)
  67 {
  68   TopoDS_Shape aResShape;
  69
  70   // Set "C" numeric locale to save numbers correctly
  71   // Kernel_Utils::Localizer loc;
  72
  73   STEPControl_Reader aReader;
  74
  75   //VSR: 16/09/09: Convert to METERS
  76   Interface_Static::SetCVal("xstep.cascade.unit","M");
  77   Interface_Static::SetIVal("read.step.ideas", 1);
  78   Interface_Static::SetIVal("read.step.nonmanifold", 1);
  79
  80   BRep_Builder B;
  81   TopoDS_Compound compound;
  82   B.MakeCompound(compound);
  83
  84   try {
  85     OCC_CATCH_SIGNALS;
  86
  87     IFSelect_ReturnStatus status = aReader.ReadFile(theFileName.c_str());
  88
  89     if (status == IFSelect_RetDone) {
  90
  91       // Regard or not the model units
  92       if (theFormatName == "STEP_SCALE") {
  93         // set UnitFlag to units from file
  94         TColStd_SequenceOfAsciiString anUnitLengthNames;
  95         TColStd_SequenceOfAsciiString anUnitAngleNames;
  96         TColStd_SequenceOfAsciiString anUnitSolidAngleNames;
  97         aReader.FileUnits(anUnitLengthNames, anUnitAngleNames, anUnitSolidAngleNames);
  98         if (anUnitLengthNames.Length() > 0) {
  99           TCollection_AsciiString aLenUnits = anUnitLengthNames.First();
 100           if (aLenUnits == "millimetre")
 101             Interface_Static::SetCVal("xstep.cascade.unit", "MM");
 102           else if (aLenUnits == "centimetre")
 103             Interface_Static::SetCVal("xstep.cascade.unit", "CM");
 104           else if (aLenUnits == "metre" || aLenUnits.IsEmpty())
 105             Interface_Static::SetCVal("xstep.cascade.unit", "M");
 106           else if (aLenUnits == "INCH")
 107             Interface_Static::SetCVal("xstep.cascade.unit", "INCH");
 108           else {
 109             theError = "The file contains not supported units.";
 110             std::shared_ptr<GeomAPI_Shape> aGeomShape(new GeomAPI_Shape);
 111             aGeomShape->setImpl(new TopoDS_Shape(aResShape));
 112             return aGeomShape;
 113           }
 114           // TODO (for other units than mm, cm, m or inch)
 115           //else if (aLenUnits == "")
 116           //  Interface_Static::SetCVal("xstep.cascade.unit", "???");
 117         }
 118       }
 119       else {
 120         //cout<<"need re-scale a model"<<endl;
 121         // set UnitFlag to 'meter'
 122         Interface_Static::SetCVal("xstep.cascade.unit","M");
 123       }
 124
 125       Standard_Boolean failsonly = Standard_False;
 126       aReader.PrintCheckLoad(failsonly, IFSelect_ItemsByEntity);
 127
 128       /* Root transfers */
 129       Standard_Integer nbr = aReader.NbRootsForTransfer();
 130       aReader.PrintCheckTransfer(failsonly, IFSelect_ItemsByEntity);
 131
 132       for (Standard_Integer n = 1; n <= nbr; n++) {
 133         Standard_Boolean ok = aReader.TransferRoot(n);
 134         /* Collecting resulting entities */
 135         Standard_Integer nbs = aReader.NbShapes();
 136         if (!ok || nbs == 0)
 137         {
 138           continue; // skip empty root
 139         }
 140         /* For a single entity */
 141         else if (nbr == 1 && nbs == 1) {
 142           aResShape = aReader.Shape(1);
 143           // ATTENTION: this is a workaround for mantis issue 0020442 remark 0010776
 144           // It should be removed after patching OCCT for bug OCC22436
 145           // (fix for OCCT is expected in service pack next to OCCT6.3sp12)
 146           if (aResShape.ShapeType() == TopAbs_COMPOUND) {
 147             int nbSub1 = 0;
 148             TopoDS_Shape currShape;
 149             TopoDS_Iterator It (aResShape, Standard_True, Standard_True);
 150             for (; It.More(); It.Next()) {
 151               nbSub1++;
 152               currShape = It.Value();
 153             }
 154             if (nbSub1 == 1)
 155               aResShape = currShape;
 156           }
 157           // END workaround
 158           break;
 159         }
 160
 161         for (Standard_Integer i = 1; i <= nbs; i++) {
 162           TopoDS_Shape aShape = aReader.Shape(i);
 163           if (aShape.IsNull()) {
 164             //return aResShape;
 165             continue;
 166           }
 167           else {
 168             B.Add(compound, aShape);
 169           }
 170         }
 171       }
 172       if (aResShape.IsNull())
 173         aResShape = compound;
 174
 175       // Check if any BRep entity has been read, there must be at least a vertex
 176       if ( !TopExp_Explorer( aResShape, TopAbs_VERTEX ).More() )
 177       {
 178         theError = "No geometrical data in the imported file.";
 179         std::shared_ptr<GeomAPI_Shape> aGeomShape(new GeomAPI_Shape);
 180         aGeomShape->setImpl(new TopoDS_Shape());
 181         return aGeomShape;
 182       }
 183     } else {
 184       theError = "Wrong format of the imported file. Can't import file.";
 185       aResShape.Nullify();
 186     }
 187   }
 188   catch (Standard_Failure const& anException) {
 189     theError = anException.GetMessageString();
 190     aResShape.Nullify();
 191   }
 192   // Return previous locale
 193   std::shared_ptr<GeomAPI_Shape> aGeomShape(new GeomAPI_Shape);
 194   aGeomShape->setImpl(new TopoDS_Shape(aResShape));
 195   return aGeomShape;
 196 }