HI

Note ....  files written by Creator are the Spec for that version that they
are writing to .... ( btw 15.6 was not a good time for Creator )

The problem was and is that the publish specs does contain errors and this
leads to problems if not using MPI's API's or I should say Presagis these
days (So you cannot rely on the spec to be totally correct in all places)

I would check the spec across several versions 15.4 was one of the most
stable 15.8 was also good, but things like DOFS have not changde much if at
all in Creator they have remain the same for most versions


There are some nuggets on spec/doc errors lying around in the old MPI forums
http://www.multigen-paradigm.com/cgi-bin/Ultimate2.cgi
And possible some in the new http://www.presagis.com/peer_forum/

____________________________________________________________________________
__
Gordon Tomlinson 

[email protected]
IM: [email protected]
www.vis-sim.com www.gordontomlinson.com 
____________________________________________________________________________
__

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Jason Daly
Sent: Friday, July 24, 2009 7:48 PM
To: [email protected]
Subject: Re: [osg-users] [osgPlugins] OpenFlight DOF node does not
readcorrectly

Scott Johnson wrote:
> Yes, it is strange!  Why couldn't they just read in four doubles like the
spec says?!?  Of course that is what I had to start but it didn't work.  A
coworker has warned me that the spec cannot be relied on to implement
OpenFlight and this is showing me that he is right.
>
> To make the test, I put different values in each box of the DOF dialog in
Creator so I'd know where the bits from each field ended up in the file.
The values were like 1.23456, 8.88888, and -10.9876544.  Powers of two and
of course zero were not good tests.
>   

OK, just making sure  :-)

I've seen deviations from the spec in various MultiGen/Creator versions 
over the years, but this is the weirdest one by far.

How do you detect it?  Just check for nan after a regular read?  That 
wouldn't seem to be reliable enough...

--"J"

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