<div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">
<br>
</div>Jerome,<br>
<br>
Have you put this anywhere? It seems like a reasonable thing to add to VTK, no?<br>
<br></blockquote><div><br>Mmmmm yes... Attached, with my previous mail ;)<br>I think I will put it in my soon-very-soon-ready-for-diffusion Chiron module (<a href="http://github.com/jeromevelut/Chiron">http://github.com/jeromevelut/Chiron</a>). I will advertise this medical imaging ParaView plugin... soon.<br>
<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Another thing - how do you get the coordinates of the center of a cell<br>
in an ImageData? The<br>
vtkCell* GetCell(vtkIdType cellId)<br>
</blockquote><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
seems to be linearly indexed, why does<br>
<br>
vtkCell* GetCell(int i, int j, int k)<br>
<br>
not exist?<br>
<br></blockquote><div><br>I don't use the vtkCell object. I use the scalar pointer for data traversal. The point Idx is linear, but you can easily compute the image coordinate from the id (and vice-versa) if you know the number of scalar components and the extent. In the same way, David G -too much David here... I will name you all Jerome in the futur- gave you the function that computes image_id[i,j,k] from world_coord[x,y,z]. It is also reversible. <br>
<br>I think that some helper functions exist in vtkImageData for these translations, but I cannot remember which. <br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Thanks,<br></blockquote><div><br>You are welcome, Jerome <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div class="h5"><br>
David<br></div></div></blockquote><div> </div><div>Jerome <br><br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div class="h5">
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</div></div></blockquote><br></div>2009/12/8 David Doria <span dir="ltr"><<a href="mailto:daviddoria%2Bvtk@gmail.com">daviddoria+vtk@gmail.com</a>></span><br>On Tue, Dec 8, 2009 at 4:20 PM, Jérôme <<a href="mailto:jerome.velut@gmail.com">jerome.velut@gmail.com</a>> wrote:<br>
> Hi,<br>
> I wrote a class that should do what you want: vtkExtractVOIFromBoundingBox.<br>
> It derives from vtkExtractVOI and overload the RequestInformation method,<br>
> where the SetVOI parameters -that are set by the user in the parent- are<br>
> automatically computed.<br>
> I added an input port to put your dataset from a pipeline<br>
> ("SourceConnection"). I use it intensively in ParaView to crop medical<br>
> images.<br>
><br>
> The caveat concerns essentially the Request.... overloading, that I may use<br>
> not correctly. You have to change the margin parameter in order to update<br>
> effectively. The pipeline seems... well, not broken, but at least 'sleepy'.<br>
><br>
> HTH<br>
><br>
> Jerome