Is it Possible to read 75MB Stl file through opencascade...

Hello Roman

As you said,I have used RWStl::ReadFile()function and StlMesh_Mesh to read an Stl File.

With that code, I'm able to read file which is of 2.7MB size within 9 sec,where as previously it has taken 48sec...

But for converting into IGES,Previously it was taking 8sec,where as in this case it's taking 2 min...

And If I'm reading STL file of size 73.2MB,I am getting a Cascade Error with out any text on error window...

Please give me any suggestions to overcome this issue.....

The code which I have used is....

Handle(TopTools_HSequenceOfShape) aSequence = new TopTools_HSequenceOfShape();
if (dlg.DoModal() == IDOK)
{
SetCursor(AfxGetApp()->LoadStandardCursor(IDC_WAIT));
CString C = dlg.GetPathName();
Standard_CString aFileName = (Standard_CString)(LPCTSTR)C;

OSD_Path aFile(aFileName);
Standard_Boolean ReturnValue = Standard_True;

Handle(StlMesh_Mesh) aSTLMesh = RWStl::ReadFile(aFile);

TopoDS_Compound ResultShape;
BRep_Builder CompoundBuilder;
CompoundBuilder.MakeCompound(ResultShape);

Standard_Integer NumberDomains = aSTLMesh->NbDomains();
Standard_Integer iND;
gp_XYZ p1, p2, p3;
TopoDS_Vertex Vertex1, Vertex2, Vertex3;
TopoDS_Face AktFace;
TopoDS_Wire AktWire;
BRep_Builder B;
Standard_Real x1, y1, z1;
Standard_Real x2, y2, z2;
Standard_Real x3, y3, z3;

StlMesh_MeshExplorer aMExp (aSTLMesh);

// BRepBuilderAPI_MakeWire WireCollector;
for (iND=1;iND<=NumberDomains;iND++)
{
for (aMExp.InitTriangle (iND); aMExp.MoreTriangle (); aMExp.NextTriangle ())
{
aMExp.TriangleVertices (x1,y1,z1,x2,y2,z2,x3,y3,z3);
p1.SetCoord(x1,y1,z1);
p2.SetCoord(x2,y2,z2);
p3.SetCoord(x3,y3,z3);

if ((!(p1.IsEqual(p2,0.0))) && (!(p1.IsEqual(p3,0.0))))
{
Vertex1 = BRepBuilderAPI_MakeVertex(p1);
Vertex2 = BRepBuilderAPI_MakeVertex(p2);
Vertex3 = BRepBuilderAPI_MakeVertex(p3);

AktWire = BRepBuilderAPI_MakePolygon( Vertex1, Vertex2, Vertex3, Standard_True);

if( !AktWire.IsNull())
{
AktFace = BRepBuilderAPI_MakeFace( AktWire);
if(!AktFace.IsNull())
CompoundBuilder.Add(ResultShape,AktFace);
}
}
}
}
TopoDS_Shape aShape = ResultShape;
aSequence->Clear();

aSequence->Append(aShape);

Thanks in Advance
Suman