[vtkusers] STLWriter output multiple splines (via vtkTriangleFilter)

[sean Harre]

Hi Yoshimi,

That was it! Switching to vtkAppendPolyData and now both are in STL!

Thanks for your help,

Sean


On Thu, Dec 29, 2016 at 5:33 PM, kenichiro yoshimi <rccm.kyoshimi at gmail.com>
wrote:

> Hi Sean,
>
> You need to convert an unstructured grid to a polydata which is
> required by vtkSTLWriter.
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/GeometryFilter
> Or you can use the vtkAppendPolyData instead of the vtkAppendData.
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filtering/CombinePolyData
>
> Thanks,
> Yoshimi
>
> 2016-12-30 6:59 GMT+09:00 sean Harre <seanharre at gmail.com>:
> > Hi,
> >
> > I have a simple example to show a problem I need help resolving. I'm very
> > new to VTK and have copied the TubesFromSplines example C++ code to
> almost
> > what I need, but one issue remains to be solved.
> >
> > The intent is to have a program where I can add multiple splines/tubes
> and
> > then output the combined form to an STL file.
> >
> > The example program I have attached generates the correct model in the
> > render window, and I get one spline in the output STL.
> >
> > But I would like all programmed splines to be merged and output to the
> STL
> > file. I need to merge them before calling the STLWriter. This is where I
> am
> > unclear.
> >
> > The example code shows a working example, and what I thought would work
> but
> > is failing and marked 'BROKEN',
> >
> > {code}
> >     //---------------------------------------
> > //    stlWriter->SetInputConnection(appendFilter->GetOutputPort()); //
> > BROKEN
> > //
> > //    ERROR: In
> > /Users/ali/code/VTK-7.1.0/Common/ExecutionModel/
> vtkDemandDrivenPipeline.cxx,
> > line 810
> > //    vtkCompositeDataPipeline (0x7f987670c630): Input for connection
> index
> > 0 on input port index 0 for
> > //          algorithm vtkSTLWriter(0x7f9876709f40) is of type
> > vtkUnstructuredGrid, but a vtkPolyData is required.
> >
> >     stlWriter->SetInputConnection(triangleFilter->GetOutputPort()); //
> WORKS
> >     //---------------------------------------
> > {/code}
> >
> >
> > I suspect there is something easy I'm missing, and would appreciate any
> > help.
> >
> > I've also attached some screenshots showing how the render window and STL
> > output look.
> >
> > And yes the code is ugly and repeats itself, but I'm just trying to
> > understand the basic concept first then can add a function for adding
> each
> > spline, etc...
> >
> > Thanks!
> >
> > Sean
> >
> >
> >
> > --
> > Sean Harre
> > seanharre at gmail.com
> >
> >
> > _______________________________________________
> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
> > http://www.kitware.com/opensource/opensource.html
> >
> > Please keep messages on-topic and check the VTK FAQ at:
> > http://www.vtk.org/Wiki/VTK_FAQ
> >
> > Search the list archives at: http://markmail.org/search/?q=vtkusers
> >
> > Follow this link to subscribe/unsubscribe:
> > http://public.kitware.com/mailman/listinfo/vtkusers
> >
>



-- 
Sean Harre
seanharre at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20161229/663b119c/attachment.html>