home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: alt.3d
- Path: sparky!uunet!decwrl!access.usask.ca!ccu.umanitoba.ca!rao
- From: rao@ccu.umanitoba.ca (Govindaraju Rao)
- Subject: Re: PS stereograms
- Message-ID: <1992Jul25.232800.26343@ccu.umanitoba.ca>
- Sender: news@ccu.umanitoba.ca
- Nntp-Posting-Host: pollux.cc.umanitoba.ca
- Organization: University of Manitoba, Winnipeg, Manitoba, Canada
- References: <12948@chalmers.se>
- Date: Sat, 25 Jul 1992 23:28:00 GMT
- Lines: 40
-
- Johan writes:
- >> When I print them (RDS) on our standard laserwriter
- >> (Apple type 300 dpi ?) it doesn't seem to produce
- >> the wanted effect.
-
- I printed them on a HP LaserJet III (300 dpi) and they seem to
- be fine. However, I have encountered the following problems.
-
- 1) In the bubble stereoram I see an "inverted" bubble. It
- appears bowl-shaped (concave away from observer). Is this
- correct or should it appear convex towards the observer, like
- a blister, or hemispherical soap bubble. I viewed it in
- both orientations i.e. arrow marks away from me and towards
- me; still the same result.
-
- 2) In the Ram's Horn sterogram I see two "objects" shaped like
- a comma (,), one larger than the other. Both these are at the
- same elevation, between and close to the upper tips of
- the horns. When I try to "lock" onto them they disappear.
- Are they really there or is my eyesight going downhill ??
- If they exist, are they intentional, or artifacts of the
- generating algorithm?
-
- 3) I am having great difficulty with the Toroid stereogram.
- I am unable to keep the image formed even fleetingly.
- What exactly am I supposed to see in this one? I see
- "ridges" on the left and right side and a large circular
- depression in the center, with another conical (?) projection
- in the dead center of the depression. Sometimes the conical
- projection appears as a floating disk. Is anyone else having
- trouble with this one ? I think my technique is correct since
- I see all the others easily.
-
- Please e-mail replies to <rao@ccm.umanitoba.ca>. Will post summary
- if warranted. (Preferably please do not reply to e-mail address
- in the header of this posting.)
-
- Thank you.
-
- G.S.K. Rao <rao@ccm.umanitoba.ca>
-