From: Ken Schwarz (kschwarz@sgi.com)
Date: 06/15/2000 13:45:01
-- ... Ken Schwarz Tech Consultant (TC) SGI Dallas kschwarz@sgi.com ... .... Vmail: 972.628.3232 Pager: 888.986.8243 Mobile: 972.672.7278 .... .... http://reality.sgi.com/kschwarz .... ... Brain: Pinky, what rhymes with June? Pinky: No it doesn't. ...
attached mail follows:
You'll have to fit the data into a power of two-sized array. If the data is very sparse there are examples in /usr/share/Volumizer/src/apps/OpenGL to handle sparse data. For best performance there has to be a mapping of the data to an efficient datastructure for OpenGL and the underlying hardware. Volumizer hides most of the complexity, but it requires the user to think of their data as a collection power of 2 bricks.
Best,
Ken
Jean-Christophe PENALVA wrote:
> Ken Schwarz a écrit : > > > > Raw data plays very well with Volumizer. There are several ways to > > skin this cat. Thankfully the TIFF image format will accomodate 3 > > dimensions of imagery. Take your raw data and convert it to .tif > > format. > > Assuming your file is named "raw_128.dat" the conversion command on > > IRIX is: > > > > % imgcopy "raw_128.dat#raw%size=128,128,128%colormodel=luminance" > > out.tif > > % imginfo out.tif > > % voglBasic out.tif > > > > imginfo should report that out.tif is 128^3 pixels of luminance data. > > If your data is not a power of two you will have to truncate or pad > > the data beforehand. > > > > Best, > > > > Ken Schwarz > > > > Tom Impelluso wrote: > > > > > > > > > > Hello... > > > > > > > > I have installed the volumizer... > > > > But it may not be what I want. > > > > It appears to be a library to WRITE volume viewing code. > > > > > > > > I have a data set that is: > > > > x y z value > > > > > > > > and there are 128x128x128 lines of such data. > > > > > > > > I only wish to VIEW this... NOT write code to write viewers... > > > > > > > > Does the volumizer package that was installed on my machine... > > > > > > Have you looked at the voglraw example!I think that is along > > > the lines of what you want although I had to rewrite the examples > > > to get it to do what I wanted! I was working with raw acoustic data > > > and wanted a specific format! > > > > > > > > > > a) have such a code.. > > > > b) a manual page so I can figure out: > > > > 1) how to recast my data in a different format > > > > (I have no problem writing code to do that) > > > > 2) how to scale the opacity and color of the values > > > > > > > > Please... > > > > help if you can.... > > > > > > > > thanks, > > > > tom > > > > > > -- > > > See Ya, > > > > > > Lawrence Eugene Bertoldi Technical Consultant > > > Silicon Graphics > > > Silver Spring MD. > > > email lberto@clubfed.sgi.com > > > > > > ~;-}> > > > > -- > > ... Ken Schwarz Tech Consultant (TC) SGI Dallas kschwarz@sgi.com ... > > .... Vmail: 972.628.3232 Pager: 888.986.8243 Mobile: 972.672.7278 .... > > .... http://reality.sgi.com/kschwarz .... > > ... Brain: Pinky, what rhymes with June? Pinky: No it doesn't. ... > > > > > When you speak about raw data, what can we do with raw data with some > data set not regular in space (but with a regular grid). The data set is > for example : > 0 0 0 value1 > 0 0 1 value2 > 0 0 2.3 value3 > 0 0 2.4 value4 > etc ... > -- > ==================================================================== > C.I.N.E.S. Centre Informatique National de l'Enseignement Superieur > Montpellier FRANCE Tel: 33 4 67 14 14 14 (Fax: 33 4 67 52 37 63) > http://www.cines.fr > mailto:jean-christophe.penalva@cines.fr > =================================================================
-- ... Ken Schwarz Tech Consultant (TC) SGI Dallas kschwarz@sgi.com ... .... Vmail: 972.628.3232 Pager: 888.986.8243 Mobile: 972.672.7278 .... .... http://reality.sgi.com/kschwarz .... ... Brain: Pinky, what rhymes with June? Pinky: No it doesn't. ...
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