Axel Sammet (axel++at++elwood.hannover.sgi.com)
Fri, 24 Jan 1997 09:02:05 +0100
The problem with commonly available diplays is, that they give every pixel
the same amount of time. Therefore the intensity is physically limited and
you need a longer drawing time for the Cathod Ray for the bright lights
sources to become REALLY bright.
This is commonly referred to as calligraphic lights and performer in
Infinite Reality supports the control of a calligraphic lights board from
EIS.
All the bright lights are drawn in the vertical retrace phase of the
drawing phase and allows you to place quite a number(several thousand) of
calligraphic lights in this period. However, it reduces the time available
to draw the initial frame.
Be sure you really need these bright lights, since the board and the
Diplays/Projectors are pretty expensive.
Let me know if you need more details/contacts.
Axel
On Jan 23, 16:15, ken sartor wrote:
> Subject: very bright lights
>
> Greetings,
>
> For an effect that i am trying to achieve, it would be
> very nice to have *EXTREMELY* bright lights... But, when
> i just naively crank up the light, i do not get the
> effect i want. What happens is that all the geometry
> is affected in the way i want (when the light is sufficiently
> bright, it turns white) but the texture is clamped to some
> value (objects that are textured and already on white
> geometry are unaffected by brightning the light source
> above 1).
>
> The effect i want is for all objects to be brightened by
> the extremely bright light source and, if it is sufficiently
> bright, to turn white. Is there some way to achieve this
> effect? Note that i want a method that will do this generally
> for various databases (i.e., i don't want to depend on
> custom made databases).
>
> Thanks in advance!
>
> ken
>
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>-- End of excerpt from ken sartor
--_____________________________________________________________________
Axel Sammet, SE Visual Simulation
Silicon Graphics GmbH | Tel: +49 511 90172-29 Ahrensburger Strasse 3 | Fax: +49 511 6138-115 30659 Hannover | VM #: 59191 M/S: IDE-3140 Germany | E-Mail: axel++at++hannover.sgi.com _____________________________________________________________________ ======================================================================= 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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