Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Fri, 21 Mar 1997 04:51:39 +0000
EIS make a calligraphic light board for the Infinite Reality,
I'm not sure what the current status of manufacture & shipment is,
it is at least in beta test at some sites.
The iR supports calligraphic lights which are subpixel zbuffer occluded
with the scene using information sent to the LPB from the rastermanagers
using the calligraphic connectors.
In addition to the subpixel light point information from the Raster
Managers the calligraphic board is sent colour, luminance and other
information like defocus from the host using the VME interface.
This is a CPU intensive task and should be performed on a dedicated
processor.
Future releases of Performer will support the EIS board with an
additional light point process calculating the light point information
like the colour, fog attenuation, defocus, sorting, and controlling the
calligraphic board. This should allow the performer users to easily render
a scene containing calligraphic lights.
The light point information output by the board is kept separate from
the video and sent to the projector using a fiber optic connection, the
video format from the iR display generator is programmed to contain
additional blanking information to allow time for the calligraphic
lights to be projected.
I believe Remi Arnaud is the engineer closest to this.
Cheers,Angus.
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