3D Structured Data to Texture Mapped Plane

[David Gobbi]

Hi Erik,

There is an example, vtk/contrib/TextureReslice.tcl, that demonstrates
how to texture map an arbitrary plane (even at oblique angles) from
StructuredPoints or ImageData.  When you run it, press 'o' and 'c'
to switch between actor and camera interaction modes.  Here's an
exercise for you: modify this example to display three planes instead
of just one.

 - David

P.S.  It's been a few thousand hours since _my_ last coffee, and...
      Hey, wait a minute!  Maybe that's why I've been in such a lousy
      mood these last few years!

On Fri, 21 Apr 2000, Erik Sobel wrote:

> Can anyone point me to example tcl code for the TEXTURE mapping approach 
> suggested by the 3D Medical Imaging application in Chap 13 p512 (it is 
> exercise 13.2) of the VTK book.  (please don't point me to the much 
> ballyhooed "Solutions to VTK exercises page" - it has hardly any solutions 
> and is really just another (elaborately html styled) list of excercises - 
> in keeping with the VTK tradition of Obfuscation Oriented Programming.
> 
> By the way (FLAME ON) why do people include "exercises" without solutions 
> in books that are supposed to provide instruction?  Who came up with this 
> concept of text-book-as-inscrutable-zen-master?  The next time you try to 
> replace a headlight on your car or set the time on your VCR imagine the 
> instructions having 10 or 12 "exercises" like "Design a clock interface 
> that a one handed person might be able to operate" - or  - "Disassemble and 
> reassemble your catalytic converter, How might you re-design it if you 
> lived in zero-gravity?"  I hate "exercises" without solutions they are not 
> helpful.  (FLAME OFF).
> 
> Specifically I am trying to extract planes of data from a structured data 
> set and, use the planes of data as textures which are mapped onto a plane 
> source.  If I extract the x=0 plane (using vtkExtractVOI) I get an error 
> about using a 3D texture.  If I permute the extracted VOI I can view it in 
> a vtkImageViewer window but, I get more errors when I use the permuted, 
> extracted VOI as a texture source any suggestions.
> 
> Thanks,
> Erik
> 
> I think somebody didn't have his coffee this morning...
> 
> 
> ---------------------------------------------------------------------------- 
> ------------------------------
> Erik Sobel
> esobel at alphatech.com
> erik.sobel at alphatech.com
> ---------------------------------------------------------------------------- 
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-- 
--
  David Gobbi, MSc                    dgobbi at irus.rri.on.ca
  Advanced Imaging Research Group
  Robarts Research Institute, University of Western Ontario

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