[vtkusers] Plotting surface contour with overlaid mesh

[Ben Medina]

Thanks, it works perfectly when
vtkMapper::SetResolveCoincidentTopologyToPolygonOffset is called. Do
you have an idea of what kind of performance hit is involved with
this?

Also, I was unaware of the EdgeVisibility on the property. Is there a
way to get it to render just the edges, and not the cells (like set
SurfaceVisibilityOff())?

Thanks,
Ben

On Thu, Feb 25, 2010 at 10:42 AM, Wes Turner <wes.turner at kitware.com> wrote:
> Use SetResolveCoincidentTopology from the mapper.
> http://www.vtk.org/doc/nightly/html/classvtkMapper.html#aa2ea475413fed0b45566e33cc9f659e8
> If you just want to see the edges and not extract them into a separate
> actor, you can also turn display of the edges by turning on the
> EdgeVisibility
>
> http://www.vtk.org/doc/nightly/html/classvtkProperty.html#a7cbadce1d984207ccabe3e75e63f11e4
> i.e. actor->GetProperty()->EdgeVisibilityOn()
>
> - Wes
>
> On Thu, Feb 25, 2010 at 12:44 PM, Ben Medina <ben.medina at gmail.com> wrote:
>>
>> Hello all,
>>
>> I have a structured grid, and I want to plot a surface contour with
>> overlaid grid lines. To get the surface, I have a pipeline like this:
>> surface grid -> vtkGeometryFilter -> vtkPolyDataMapper -> vtkActor
>>
>> To get the grid lines, I take the output of the geometry filter and
>> extract edges:
>> vtkGeometryFilter -> vtkExtractEdges-> vtkPolyDataMapper -> vtkActor
>>
>> However, the rendering of the lines clips the surface, leading to poor
>> output as in the attached image. How can I lift the lines off the
>> surface to get correct rendering?
>>
>> Thanks,
>> Ben
>>
>> _______________________________________________
>> 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
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>>
>
>
>
> --
> Wesley D. Turner, Ph.D.
> Kitware, Inc.
> Technical Leader
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4920
>