I have a problem with OpenCascade's export routines. How can I translate my GeomAPI_PointsToBSplineSurface to IGES entities?
Thanks.
Damir
Roman Lygin Thu, 05/03/2001 - 12:15
Dear Damir,
In fact, GeomAPI_PointsToBSplineSurface is not an object representing a surface of Open CASCADE. For that, descendants of Geom_Surface are intended. GeomAPI_PointsToBSplineSurface is rather an algorithmic tool that constructs a surface from a grid of points. Resulting surface (which is of the type Geom_BSplineSurface) is returned by method GeomAPI_PointsToBSplineSurface::Surface. Nonetheless, this method serves also as type cast to Geom_BSplineSurface.
To export that resulting surface to an IGES, you can use method IGESControlStd_Writer::AddGeom. For details how to create and correctly initialize object IGESControlStd_Writer, please refer to relevant documentation and samples.
Thank you very much for jour help at my problem about IGES file. During the last 4 days I tried to exporting an IGES file, but it was resultless. I am new at CAS.CADE and one example would help me by understanding details how to writing an IGES file. My code is:
Thu, 05/03/2001 - 12:15
Dear Damir,
In fact, GeomAPI_PointsToBSplineSurface is not an object representing a surface of Open CASCADE. For that, descendants of Geom_Surface are intended. GeomAPI_PointsToBSplineSurface is rather an algorithmic tool that constructs a surface from a grid of points. Resulting surface (which is of the type Geom_BSplineSurface) is returned by method GeomAPI_PointsToBSplineSurface::Surface. Nonetheless, this method serves also as type cast to Geom_BSplineSurface.
To export that resulting surface to an IGES, you can use method IGESControlStd_Writer::AddGeom. For details how to create and correctly initialize object IGESControlStd_Writer, please refer to relevant documentation and samples.
Best regards, Roman
Sun, 05/06/2001 - 10:29
Hello Roman,
Thank you very much for jour help at my problem about IGES file. During the last 4 days I tried to exporting an IGES file, but it was resultless. I am new at CAS.CADE and one example would help me by understanding details how to writing an IGES file. My code is:
//Surface
Handle (Geom_BSplineSurface) BS = GeomAPI_PointsToBSplineSurface (array12,3,8, GeomAbs_C2,0.1);
TopoDS_Shape S1 = BRepBuilderAPI_MakeFace(BS);
Handle (AIS_Shape)Face = new AIS_Shape(S1);
myAISContext->Display(Face);
//Exporting to an IGES file
IGESControlStd_Writer writer;
IGESControlStd_Writer :: AddGeom;
Interface_Static::CVal ("XSTEP.iges.unit");
Standard_Boolean ok = writer.AddShape(S1);
Standard_Boolean ok = writer.Write ("S1.igs");
Best regards, Damir.