Re: 3d HMDs+VRML

D. Owen Rowley ([email protected])
Mon, 29 May 1995 13:00:57 -0700


At 09:29 AM 5/29/95 BST, Rycharde Hawkes wrote:
>patrick.curry wrote:
>> And if there is, or if there is not... I believe that the defined camera
>> focal length could be used as a REAL focal length for the viewer. For
>> example, the object that is the approximate defined distance away from the
>> viewer/camera's position is clear, while closer and farther objects are
>> blurry respectively.

>Trying to fix the distance at which your eyes will converge and accomodate
>is unlikely to work. What distance would you fix it at? 60cm? 6metres?
>Chances are you'd try and "focus" on different distances depending on
>the task you are trying to perform.

not to mention that the various HMD's have very different ways of approaching
the issue, which *could* be just a driver level problem.
Of course thats trivial in light of the issues regarding pathological efects
of HMD's to begin with. Fixed depth problems are quite well known and
documented,
and decidedly NOT the answer you want for a content design issue.

VIO, who seem genuinely concerned enough to actually engineer their
eyeglasses product around the more serious problems, are the only HMD
manufacturer that i trust at this point.
But beyond that teher are plenty of 3D delivery systems besides HMD's.

>If you're going to spend all that extra CPU on blurring objects, why
>not use it to make them more realistic/go faster?

I was tempted at first to make a pun and say that this was rich.!
but I think that if one stands back from this interchange a bit and takes note
of the gaping holes in the issue created by a close left-brain-focus, one might
recognise that close-focus is just anotherway of saying short sighted.

Technologists often solve problems one at a time, but when the problems are
really a puzzle in process, too close a focus can lead to *real* problems.

VRML"s journey is clearly one of layered-integration, adopting and adapting,
as technology advances.

LUX ./. owen

D. Owen Rowley - [email protected] - http://tcc.net.org/~owen
Organ Grinder: The Community Company LTD. http://tcc.net.org/~tcc
What this industry needs are good "people-oriented" cyberspace applications
- Because the world isn't just 3D -