[Radiance-general] Re: Compiling Radiance under Interix (rpict problems)

[Greg Ward]

Hi Andy,

Are you compiling from the official 3.5 release, or the latest HEAD 
(available from radiance-online)?  If you are compiling from the 
official release, the first thing to try (always) is downloading and 
compiling the HEAD release, which has quite a few bug fixes, especially 
related to portability across platforms.

If you do this and are still seeing errors, then I suggest you post a 
message to the radiance-dev list, since it will then be a development 
issue once we are working on the latest sources.  It is not worthwhile 
for anyone to attempt to debug the official release at this stage, as 
they are 90% likely to be rediscovering bugs that have already been 
found and fixed.

Thanks for your efforts -- hopefully, this won't take long.

-Greg

P.S.  Be sure to overlay the rad3R5supp.tar.gz files over the HEAD 
release prior to compiling, as without these additional files, you 
won't have a complete distribution.

> From: Andy Stone <andy.stone@bdsp.com>
> Date: Wed Nov 12, 2003  6:23:26  AM US/Pacific
>
> Hi,
>
> I'm currently using Radiance compiled to run under Windows Services 
> for Unix (Interix) and am attempting to upgrade from my current 
> version (3.1) to the latest version (3.5).� I have managed to get 3.5 
> to compile without any errors (except for trad and rholo, which I'm 
> not too worried about right now), however I am experiencing problems 
> when using rpict.� The other components (rtrace, rview, etc) seem to 
> be working correctly (or at least producing results similar to my 
> previous installation) however the images produced rpict are looking 
> very strange (and very different to rview).�
>
> It is kind of hard to describe the results I am getting in plain text, 
> but if for example I use rpict to produce a fisheye view of a CIE 
> overcast sky then it produces a luminance pattern that starts off from 
> the horizon getting brighter as it heads towards the zenith before 
> suddenly dropping to zero about a third of the way up from where it 
> increases again until about 2/3rds up where it drops to zero again, so 
> the luminance distribution from horizon to zenith looks something like 
> a saw tooth (rather than smoothly increasing from horizon to zenith as 
> it should).� I get a similar effect across surfaces when I render more 
> complex scenes.� The same scene with the same settings works on the 
> older version of rpict.� The effect is as if a variable somewhere is 
> increasing beyond its maximum range and wrapping back around to zero.
>
> I'd be very grateful for any help as to what the problem might be (and 
> how I can fix it).� Perhaps there is some compiler switch that I need 
> to set?
>
> Kind regards,
>
> Andy Stone