Nathaniel Bletter (nat++at++od.sri.com)
Wed, 4 Dec 1996 12:59:44 -0800
Do you mean that performer is picking the wrong object because of screen
offsets, or that picking in one means that object isn't neccesarily under the
cursor in the other eye. If the latter, people usually pick things in this way
with their dominant eye. YOu can figure out which eye is dominant by pointing
at a small object with both eyes open and holding your finger there. Then close
each eye and see which one actually "sees" your finger over the object- this is
the dominant eye. Or you can look through a hole at something. The eye that
actually sees the object through the hole is the dominant eye.
You could set up a little graphics scene to test for the dominant eye for each
user at the begininng of each session and then apply the picking to the image
for the dominant eye.
The other way of picking in 3D is with a 3D ray that you can shoot through an
object, but this is unnatural and much more difficult for distant objects,
especially with noisy 3D trackers.
If the problem is with performer instead, perhaps if you're using old style
stereo (with the screen split in half) the blanking bar in the middle might be
messing up the screen to world coordinate transformation.
--Nat Bletter SRI International nat++at++od.sri.com http://os.sri.com/people/nat/ (415) 859-4358 ======================================================================= List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/ Submissions: info-performer++at++sgi.com Admin. requests: info-performer-request++at++sgi.com
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