Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Fri, 17 Jan 1997 08:55:00 +0000
> I can't use a tag background; in the actual marine simulation, the background
> smears around whenever I move.
Well the idea using TAG clear is that you intend to write every pixel on
the screen each frame.
So you should be drawing a box or something for your water environment.
It can be faster if clear isn't a sexy enough background for you and you
want to draw an environment anyway or if you are inside an interior or
something.
If your drawing a water surface and/or sea bed anyway then you should
try the TAG clear because it may be faster depending on coverage.
This is the sort of setup you'd need for TAG clear.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <--sea surface
| |
| | <--surrounding background wall
| (> pfChannel pos |
| |
| |
| |
_____________________________________ <--sea bed
Happy swimming,
Angus.
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