Re: Picking in Stereo

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Sharon Clay (src++at++rose.asd.sgi.com)
Sun, 8 Dec 1996 20:07:20 -0800

+>---- On Dec 8, 8:13pm, Angus Dorbie wrote:
> Subject: Re: Picking in Stereo
->Subject: Re: Picking in Stereo
->
->Picking in stereo becomes a 3D collision problem rather tahn a
->Line Of Sight problem.
->
->If you want it to work with LOS then you can only expect this to work
->for one eye since a 2D position on the screen will map to a different
->LOS vector for each eye and potentially pick a different object.

Exactly - this is especially true since picking takes into account
the channel view offsets that are usually set up to do stereo.
You could undo the channel view
You could set the view offset to 0 for the purpose of the picking
each frame before the pick (and reset it after). This way you would
pick from between the eyes instead of from the side.
For future Performer, we should probably have it be settable whether
or not view offsets are used in the picking.

src.

-- 
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Sharon Rose Clay (Fischler) - Silicon Graphics, Advanced Systems Dev.
src++at++sgi.com  (415) 933 - 1002  FAX: (415) 965 - 2658  MS 8U-590
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