home *** CD-ROM | disk | FTP | other *** search
INI File | 1995-01-01 | 4.3 KB | 97 lines |
- [This was in RTNews4]
-
- NFF Files from Thierry Leconte
-
- [I found some wonderful NFF files at the site irisa.irisa.fr [131.254.2.3] in
- the NFF directory. Particularly good is the Amiga computer model, but
- all of them are pretty worthwhile.
-
- BowlingPin.nff - guess
- amiga.nff - an Amiga 2000 keyboard and computer (no monitor) - very nice
- balls.nff - just a scene generated by SPD ball program
- crypt.nff - a mysterious crypt (with columns and whatnot)
- expresso.nff [sic] - T. Todd Elvins' Utah espresso maker in NFF format
- hangglider.nff - a hang glider
- jaws.nff - don't be afraid, it's just a nff scene
- matchbox.nff - a box of matches and some matches
- room.nff - an office with the desk and others things
- spirale.nff - a spiral spline thingie
- spring.nff - a spring thing
- sps7.nff - a bull sps7 computer box
- teapot.nff - the mythical one
- temple.nff - pseudo-roman pagan temple something
- tpotbis.nff - ye olde teapot, with lid ajar
- watch.nff - a wristwatch
- x29.nff - fighter plane
-
- Unfortunately, there are some problems with some databases. Problems included:
-
- - polygonal patches with normals given as [0,0,0].
- - polygons with no area (usually a triangle with a doubled vertex).
- - inconsistently defined polygons. The NFF format specifies that you
- should output the polygon vertices in a particular order (counter-
- clockwise when viewed from above in a right-handed coordinate
- system). I suspect you use double sided polygons so that it does not
- matter.
- - other minor problems.
-
- The files I had problems with:
-
- amiga.nff - there are a few polygons with no area (doubled vertices). The
- first is around line 1518 of the file.
- jaws.nff - there are tons of polygonal patches with normals of [0,0,0]
- room.nff - polygons with [0,0,0] normals, and some no area polygons. The first
- two polygons in this file are HUGE. I cannot get the normals per
- vertex to display properly on my system, because some of the vertex
- normals differ inconsistently from the polygon normal (I haven't quite
- figured this out).
- spring.nff - the "Shine" and "Transmission" values are switched here, I
- suspect. Shine is 0, while Kt is 30! You should definitely fix the
- material setup line here.
- temple.nff - no area polygon around line 433. I can't get the normals to line
- up properly, similar problem to room.nff.
- watch.nff - lots of [0,0,0] normals here.
- x29.nff - on line 3641 there is an extra vertex - the polygon says it has
- 3 vertices, but 4 vertices appear (possibly my file is corrupt).
-
-
- Some comments I pasted together from Thierry Leconte
- (Thierry.Leconte@irisa.fr), who is the caretaker of the files:
-
- In fact I'm only a novice in ray-tracing area. I work on distributed systems
- and parallelism. But ray-tracers are good applications to test such systems.
- Now I work on a modified version of VM_pRay (the parallel ray-tracer of
- Didier.Badouel@irisa.fr) which run on our own distributed system (called
- GOTHIC). We are writing a motif based window interface for it and I am trying
- to collect as many nff files as I can in order to run nice demos on the Gothic
- system. I have made available most of these files and some utilities (among
- others yours) via anonymous ftp from irisa.irisa.fr. Most of the non
- classicals scenes I have come from a scene designer Xavier Bouquin who works
- on a amiga with the Scult4D program. and Philippe.Joubert@irisa.fr has
- written a sculpttonff converter. But if someone knows other converters or
- interesting nff files I will be happy to add them to my collection!
-
- VM_pRAY (ray tracer) of Didier Badouel is available at the same site.
-
- Feel free to use, copy ,modify and distribute these files provided that they
- are not use for commercial purpose and that the name of the author is
- mentioned.
-
- Most of these scenes was made on an amiga with Scult4D (a truly great modeler)
- then they have been converted to nff file with sc2nff (a PD converter
- available on the same site, same directory in the utils.tar archive).
-
- The author of crypt,jaws,matchbox,room,temple,watch is Xavier Bouquin
- (email to pjoubert@irisa.fr).
-
- teapot, x29 were ftp'ed from cs.uoregon.edu.
-
- amiga, hangglider, teapotbis were PD Scult4D files available on a amiga site
- archive (will try in the future to collect any PD Scult4D file an convert them
- to nff).
-
- sps7 was made by hand.
-
- balls and spirale - generated by program.
-
-