From: salnick@dejavu.spk.wa.us (Bob Salnick)
Subject: Re:  sci.virtual-worlds
Date: 15 Nov 91 05:31:58 GMT



In article <1991Nov14.001617.11671@milton.u.washington.edu>
jraymond@BBN.COM (Jayson Raymond) writes:

>While the world may not actually decay as you turn your head,
>your ability to detect details in moving objects does. This is in fact
>being exploited by HDTV/video compression researchers trying to get the
>most bang (aesthetic appeal) for the byte. Even the Mac and other
>windowing systems recognize that while something in is in motion, you
>don't have to draw the whole thing to clue the user, such as in the acts
>of moving or closing windows. 

This technique is also used by AutoCad, when a selected object of arbitrary
complexity is moved - it's outline is rendered first, followed by increasing
detail...  If the designer is moving the object quickly, it is only sketchily
rendered... when he pauses, rendering of increasing detail continues.


Bob Salnick, Spokane,WA |  USENET:     oliveb!isc-br!tau-ceti!DejaVu!salnick
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