Convert Stp to gltf crashed.

Convert Stp to gltf crashed:

  //
//  TL3DModelConverter.cpp
//  OpenCVDemo
//
//  Created by zoulin on 2022/4/25.
//

#include "TL3DModelConverter.hpp"
#include <STEPCAFControl_Reader.hxx>
#include <STEPCAFControl_Controller.hxx>
#include <XCAFApp_Application.hxx>
#include <TopoDS_Compound.hxx>
#include <TDocStd_Document.hxx>
#include <XCAFDoc_ShapeTool.hxx>
#include <TDF_LabelSequence.hxx>
#include <BRep_Builder.hxx>
#include <TopoDS_Shape.hxx>
// Mesh Methods
#include <Prs3d_Drawer.hxx>
#include <BRepMesh_IncrementalMesh.hxx>
// Gltf Methods
#include <Prs3d.hxx>
#include <Prs3d_Drawer.hxx>
#include <StdPrs_ToolTriangulatedShape.hxx>
#include <TColStd_IndexedDataMapOfStringString.hxx>
#include <RWGltf_CafWriter.hxx>
#include <RWMesh_CoordinateSystem.hxx>
#include <XCAFDoc_DocumentTool.hxx>

#include <iostream>

using namespace std;


int step2glbFormat(const string& in, const string& out)
{
    // read / create / fill in the document
    Handle(TDocStd_Document) theXdeDoc; // created in advance
    if (!theXdeDoc.IsNull()) {
        theXdeDoc.Nullify();
    }

    Handle(XCAFApp_Application) anApp = XCAFApp_Application::GetApplication();
    anApp->NewDocument("MDTV-XCAF", theXdeDoc);

    STEPCAFControl_Reader aStepReader;

    if (aStepReader.ReadFile(in.c_str()) != IFSelect_RetDone) {
        // parse error
        cout << "Read file parse error." << endl;
        return -1;
    }
    if (!aStepReader.Transfer(theXdeDoc)) {
        // translation error
        cout << "translation error." << endl;
        return -1;
    }

    if (!XCAFDoc_DocumentTool::IsXCAFDocument(theXdeDoc)) {
        //XDE doc error
        cout << "XDE doc error." << endl;
        return -1;
    }

  // collect document roots into temporary compound
  Handle(XCAFDoc_ShapeTool) aShapeTool = XCAFDoc_DocumentTool::ShapeTool(theXdeDoc->Main());

  TDF_LabelSequence aRootLabels;
  aShapeTool->GetFreeShapes(aRootLabels);

  TopoDS_Compound aCompound;
  BRep_Builder    aBuildTool;
  aBuildTool.MakeCompound(aCompound);
  for (TDF_LabelSequence::Iterator aRootIter(aRootLabels); aRootIter.More(); aRootIter.Next())
  {
      const TDF_Label& aRootLabel = aRootIter.Value();
      TopoDS_Shape aRootShape;

      if (XCAFDoc_ShapeTool::GetShape(aRootLabel, aRootShape))
      {
          cout << "Build tool add a compound." << endl;
         aBuildTool.Add(aCompound, aRootShape);
      }
  }

  // perform meshing
  Handle(Prs3d_Drawer) aDrawer = new Prs3d_Drawer(); // holds visualization defaults
  aDrawer->ClearLocalAttributes();
  aDrawer->SetupOwnShadingAspect();


  BRepMesh_IncrementalMesh anAlgo;
  //anAlgo.ChangeParameters().Deflection = Prs3d::GetDeflection(aCompound, aDrawer);
  anAlgo.ChangeParameters().Deflection = StdPrs_ToolTriangulatedShape::GetDeflection(aCompound, aDrawer);      //crash statement
  anAlgo.ChangeParameters().Angle      = 20.0 * M_PI / 180.0; // 20 degrees
  anAlgo.ChangeParameters().InParallel = true;
  anAlgo.SetShape (aCompound);
  anAlgo.Perform();

  // write or export the document
  TColStd_IndexedDataMapOfStringString aMetadata;
  RWGltf_CafWriter aGltfWriter(out.c_str(), Standard_True);
  // STEP reader translates into mm units by default
  aGltfWriter.ChangeCoordinateSystemConverter().SetInputLengthUnit (0.001);
  aGltfWriter.ChangeCoordinateSystemConverter().SetInputCoordinateSystem(RWMesh_CoordinateSystem_Zup);
  aGltfWriter.SetTransformationFormat(RWGltf_WriterTrsfFormat_Compact);

    if (!aGltfWriter.Perform(theXdeDoc, aMetadata, Message_ProgressRange())) {
        // export error
        std::cout << "export error\n" << endl;
        return -1;
    }

  return 0;
}

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