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<p class=MsoNormal><span style='color:#1F497D'>Hi Doug,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I’ve recently been dealing
with the same kind of thing. I ended up with a pipeline which looks
something like:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>vtkSphereSource->vtkCutter->vtkTransformPolyDataFilter->vtkPolyDataMapper->vtkActor<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>
^ ^<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>
| |<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>
vtkPlane vtkMatrixToLinearTransform<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>The matrix assigned to
vtkMatrixToLinearTransform should be the Inverse of the matrix in the vtkImageReslice.
The vtkPlane should be in the same orientation and position as the
vtkImageReslice. The normal to the plane is the cross product of the X
and Y direction cosines of the vtkImageReslice.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>This will work for a single
sphere, I’m not sure if you’ll need the same pipeline for each
sphere.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Good Luck.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> --
Scott<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>Doug
Hoppes<br>
<b>Sent:</b> Thursday, May 27, 2010 2:40 PM<br>
<b>To:</b> vtkusers@vtk.org<br>
<b>Subject:</b> [vtkusers] spheres drawn onto an image<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi all,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>
I’m trying to figure out the best way to solve this problem: I have
an image volume (say 1000 x 1000 x 200). In that volume, I have random
spheres placed. I would like to get any image slice (I’m using the
vtkImageReslice to grab the images slices) with the sphere image
imprinted on the image slice. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> For example, say that
I’m moving down through the Z plane and there are 5 blue spheres in my
volume. I would like to see blue circles on different image slices
(depending on what spheres interact with which plane). Does this make
sense?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Doug<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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