[Radiance-general] rholo & .hif files

[Greg Ward]

Hi Olga,

Download my paper on the Holodeck from:

	http://www.anyhere.com/gward/papers.html

You want to align your model with the coordinate axis, and create a 
section grid that corresponds to a volume of free movement inside your 
space.  How you figure out these coordinates is up to you -- I might 
recommend trying rview with the "trace" command to determine the 
locations of various scanned surfaces.

-Greg

> From: O Graf <s0343631 at sms.ed.ac.uk>
> Date: June 11, 2004 4:21:53 AM PDT
>
> Hi!
>
> What is actually the trick for setting the right values for the 
> 'section'
> variable in a .hif file? The rad-file which I use contains a laser 
> scan of a
> real room and I have no idea what are the right values for the 
> 'section'
> variable. Every time I change the values the actual grid appears 
> somewhere in
> the middle of the whole scenery and I get such warnings as
>
>           dev/ogl.hdi: no sections visible from this view
>
> if I try to turn around or to zoom. I understand why these warnings 
> come, but I
> would like to know how I can estimate the values for the section to 
> avoid the
> warnings and to be able to see the whole room and not only 2 walls.
>
> Another funny thing is that the whole room stands on its side, i.e. 
> lines that
> are supposed to be vertical appear horizontal. First I thought the view
> direction might be wrong, but if I run the same .oct-file with rview 
> using the
> same view-file everything is perfect. In addition to the right view 
> direction
> the rview-command produces colored images and rholo gives only grey 
> values from
> the same .oct-file. Is there a particular reason for such different 
> results?
>
> regards,
>
> Olga