[vtkusers] Filling vtkCutter output

[Jothybasu K Selvaraj]

How do you position your contour actors over the imageactor, are you using
setPosition for the actors. Because sometimes the actor are hidden behind
the images.

Basically a z-buffer problem.

Thanks,

Jothy

On Fri, Apr 9, 2010 at 2:05 PM, Scott Johnson <Scott.Johnson at neuwave.com>wrote:

>  Yes, that’s the general idea.  I want to cut the ROI with the presented
> image plane creating a contour and superimpose it over the resliced image.
>
>
>
> Thanks
>
>
>
>                                 -- Scott
>
>
>
> P.S.  In a previous life I worked for Philips on the Pinnacle radiation
> therapy planning system, so I’m familiar with what Eclipse does.
>
>
>
> *From:* Jothybasu K Selvaraj [mailto:jothybasu at gmail.com]
> *Sent:* Friday, April 09, 2010 3:20 AM
>
> *To:* Scott Johnson
> *Cc:* vtkusers at vtk.org
> *Subject:* Re: [vtkusers] Filling vtkCutter output
>
>
>
> Do you want to do like the Eclipse (varian) planning system does??
>
>
>
> (give me sometime to get back to you)
>
>
>
> Thanks,
>
>
>
> Jothy
>
> On Thu, Apr 8, 2010 at 9:16 PM, Scott Johnson <Scott.Johnson at neuwave.com>
> wrote:
>
> Thanks for the attempt Jothy.  I think I need a little more guidance.  I’m
> not able to decipher everything that vtkLinearExtrusionFilter can do.
>
>
>
> vtkLinearExtrusionFilter seems to extrude in 3 dimensions.  I only need to
> extrude in 2D to fill the resulting contour after I cut the sphere with a
> plane.  Here are the settings I used:
>
>
>
>     extrude = vtkLinearExtrusionFilter::New();
>
>     extrude->SetInputConnection(_cutter->GetOutputPort());
>
>     extrude->CappingOn();
>
>     extrude->SetExtrusionTypeToPointExtrusion();
>
>     extrude->SetExtrusionPoint(145.0, 222.0, 35.0);
>
>
>
> The extrusion point I set is the center of the sphere.
>
>
>
> I’ve actually got 2 concentric spheres and when I use this I get some weird
> effects.  (I’ll attach a picture.)  The red sphere is the outside and it
> seems to be attempting to make some kind of connection to the extrusion
> point.  The green sphere comes closer, but extrudes out as well as into the
> center.  Finally, the extrusion doesn’t fill the center of either sphere.
>
>
>
> The picture shows an Axial, Sagittal, and Coronal slice as well as a
> rendering.
>
>
>
> I also get a series of errors reading:
>
> ERROR:  In ..\..\Graphics\vtkLinearExtrusionFilter.cxx, line 133
> vtkLinearExtrusionFilter[06C80510: No data to extrude!
>
>
>
> That could be the issue as well.  I did _cutter->Update() prior to
> connecting it to the linear extrusion filter.
>
>
>
> Thanks
>
>
>
>                                 -- Scott
>
>
>
> *From:* Jothybasu K Selvaraj [mailto:jothybasu at gmail.com]
> *Sent:* Thursday, April 08, 2010 1:38 PM
>
>
> *To:* Scott Johnson
> *Cc:* vtkusers at vtk.org
> *Subject:* Re: [vtkusers] Filling vtkCutter output
>
>
>
> What about using vtkLinearExtrusionFilter for filling these polygons?
>
>
>
> Let me know if it works Scott.
>
> Thanks,
>
> Jothy
>
> On Thu, Apr 8, 2010 at 5:27 PM, Scott Johnson <Scott.Johnson at neuwave.com>
> wrote:
>
> Howdy,
>
>
>
> I’ve got a vtkSphereSource cut by a vtkPlane using vtkCutter.  This gives
> me the outline of a circle which I’m overlaying on my images.  Is there a
> way for me to fill the circle with color?
>
>
>
> Thanks
>
>
>
>                                 -- Scott
>
>
>
>
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