Hi, I tried to write PythonOCC equivalent of the STLReader code that Thomas provided. You can find it in this gist: https://gist.github.com/1446374
I use a representation of a cube in the form of vertex-faces data and build a compound shape in the same way as done in STL reader code. The final shape gets successfully built. However when I try to perform a boolean fuse operation with another shape I get RuntimeError: StdFail_NotDone BRep_API: command not done (See the commented lines at the end in above mentioned code) Any idea how to investigate this further? Thanks, -- Jayesh On Thu, Dec 1, 2011 at 8:47 AM, Jayesh Salvi <jayeshsa...@gmail.com> wrote: > Thomas, > > I had the same idea, so I tried a shortcut method. I converted the mesh > data of a simple cube into STL and tried to load it using STLReader API (of > PythonOCC). I got NotDone failure, if I recall correctly. I will try to > port the code snippet to python and see if that helps. > -- > Jayesh > > > On Wed, Nov 30, 2011 at 3:10 PM, Thomas Paviot <tpav...@gmail.com> wrote: > >> 2011/11/30 Thomas Paviot <tpav...@gmail.com> >> >>> 2011/11/30 Jayesh Salvi <jayeshsa...@gmail.com> >>> >>>> Thomas, >>>> >>>> Is there a way to do this other way around? i.e. if I have mesh >>>> information how do I convert it to Solid. >>>> >>> >>> I think we should have a look at the STL Importer implemented in OCC. >>> They actually convert mesh information into solids. >>> >>> >>>> I think that's what Chris was asking too. I've tried to do it >>>> (here<https://gist.github.com/1351019>), >>>> but the solids I create do not behave correctly in subsequent boolean >>>> operations on them. >>>> >>>> Any hint will be appreciated. Thanks. >>>> -- >>>> Jayesh >>>> >>>> >>> Thomas >>> >>> >> Attached below a snippet of the OCC code from STL_Reader.cxx. The >> algorithm for mesh to TopoDS_Shape conversion can be ported to python. >> >> Thomas >> >> === >> void StlAPI_Reader::Read(TopoDS_Shape& aShape, const Standard_CString >> aFileName) >> { >> OSD_Path aFile(aFileName); >> >> Handle(StlMesh_Mesh) aSTLMesh = RWStl::ReadFile(aFile); >> Standard_Integer NumberDomains = aSTLMesh->NbDomains(); >> Standard_Integer iND; >> gp_XYZ p1, p2, p3; >> TopoDS_Vertex Vertex1, Vertex2, Vertex3; >> TopoDS_Face AktFace; >> TopoDS_Wire AktWire; >> BRepBuilderAPI_Sewing aSewingTool; >> Standard_Real x1, y1, z1; >> Standard_Real x2, y2, z2; >> Standard_Real x3, y3, z3; >> >> aSewingTool.Init(1.0e-06,Standard_True); >> >> TopoDS_Compound aComp; >> BRep_Builder BuildTool; >> BuildTool.MakeCompound( aComp ); >> >> StlMesh_MeshExplorer aMExp (aSTLMesh); >> >> 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()) >> BuildTool.Add( aComp, AktFace ); >> } >> } >> } >> } >> aSTLMesh->Clear(); >> >> aSewingTool.Load( aComp ); >> aSewingTool.Perform(); >> aShape = aSewingTool.SewedShape(); >> if ( aShape.IsNull() ) >> aShape = aComp; >> } >> >> >> _______________________________________________ >> Pythonocc-users mailing list >> Pythonocc-users@gna.org >> https://mail.gna.org/listinfo/pythonocc-users >> >> >
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