Re: [Flightgear-devel] St. Elmo's Fire

2004-11-02 Thread Boris Koenig
David Culp wrote:
> [...]
If I change the time-of-day to something darker the panel code darkens and redens 
everything, which ruins the effect.
> [...]
That's exactly something I have also observed, in particular with
self-illuminating instruments - something like a basic LCD or TFT
shouldn't be subject to general panel darkening, as it has its own
illuminiation - I looked into David's (Megginson) sources and it seems
one would either need to define areas on the panel/screen that aren't
darkened, or -preferably- (in my opinion) provide an additional
parameter to layers that are not subject to panel-darkening.
And for your St. Elmo's Fire it would probably be benefitting if you
could add some diffuse effects, too - I think that's beyond the
capablities of the current XML-instrument code !?
My questions are:
  Can the instrument darkening/redening be turned off per-instrument?
currently not - I'm afraid, at least that's the conclusion that I came
up with ...

  Should we have a seperate screen-drawing subsystem that draws "windscreen   
effects", like St. Elmo's Fire, rain, snow, glare?
I like the idea
-
Boris
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Re: [Flightgear-devel] St. Elmo's Fire

2004-11-02 Thread Christian Mayer
David Culp schrieb:
I've been playing with modeling St. Elmo's Fire as an instrument:
http://home.comcast.net/~davidculp2/stelmo-clear-sky.jpg
http://home.comcast.net/~davidculp2/stelmo-in-clouds.jpg
which is convenient, but has some problems.  The main problem here is that 
it's barely visible inside of clouds, where one would expect to see it.  If I 
change the time-of-day to something darker the panel code darkens and redens 
everything, which ruins the effect.

Then of course there's the problem of setting up a boolean property that 
randomly, and rapidly, is "true", in order to model "flickering".  
To increase contrast, you could draw the lines in black for one frame, 
then white for a few frames and then balck again for one frame.

This works at least for normal lightning (but it can be that it won't 
work here)

CU,
Christian
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Re: [Flightgear-devel] St. Elmo's Fire

2004-11-01 Thread Ampere K. Hardraade
These may help:

http://www.airliners.net/open.file/608244/L/
http://www.airliners.net/open.file/014507/L/

Ampere

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Re: [Flightgear-devel] St. Elmo's Fire

2004-11-01 Thread Ampere K. Hardraade
I'm for this particular idea.

Ampere

On November 1, 2004 08:57 pm, David Culp wrote:
>   Should we have a seperate screen-drawing subsystem that draws "windscreen
>       effects", like St. Elmo's Fire, rain, snow, glare?

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[Flightgear-devel] St. Elmo's Fire

2004-11-01 Thread David Culp
I've been playing with modeling St. Elmo's Fire as an instrument:

http://home.comcast.net/~davidculp2/stelmo-clear-sky.jpg
http://home.comcast.net/~davidculp2/stelmo-in-clouds.jpg

which is convenient, but has some problems.  The main problem here is that 
it's barely visible inside of clouds, where one would expect to see it.  If I 
change the time-of-day to something darker the panel code darkens and redens 
everything, which ruins the effect.

Then of course there's the problem of setting up a boolean property that 
randomly, and rapidly, is "true", in order to model "flickering".  

My questions are:

  Is there an alternate method to model St. Elmo's Fire?

  Can the instrument darkening/redening be turned off per-instrument?

  Should we have a seperate screen-drawing subsystem that draws "windscreen   
effects", like St. Elmo's Fire, rain, snow, glare?



Dave
-- 

David Culp
[EMAIL PROTECTED]


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