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SubjectRE: "show scene" permanently overwrites DMX channel
FromPhilipp Gysin
DateWed, 30 Oct 2002 15:20:18 +0100


First of all thank you very much your prompt feedback.

> Keep in mind that scene 5.3 (show d03 for 1.0s) will still
> overwrite channel
> 1 every three seconds.

That is no problem. It's the motor speed for changing colors. And I like
speed whe it comes to processing ;-)

> > What I don't understand is that if I have some value in
> channel 5 step iii)
> > correctly overwrites it (engine B has higher priority) but
> when it returns
> > it doesn't restore the previous value. (?) I thought the
> channel would just
> > temporarily be overwritten....
>
> The problem here is that list 5, after starting 10.1 in
> engine B, ends. This
> means that engine C returns to 5.0 and clears all channels.
> That's why, when
> engine B is done, the channel don't return to their original values.

> You can fix the problem by appending "hold for ever" to cuelist 5.

mmmh. I tried that but to no avail. Is it possible that values set over
TCP/IP do not belong to a scene and that therefore they are not embedded in
the layer's priority scheme ? But I actually set 5[255] in 5.1

I may have a workaround: script 10 calls a scene to set DMX 5 to 255 before
exiting. Channel 5 ist the dimmer in the CMY lamp that I use.
>
> BTW, what you're doing here is quite complex.. I wonder, what
> are you making? :)

I'm doing the programming for an art project here in Basle, where we have to
control light color in relation to the day of the year and "internet
activity".... I can forward you to a describing web site when it will be
online - I guess je verstaat duits... ;-)

Now. A lamp array will be on a silo where sometimes worker have to enter...
And when they switch the room's light on, the lamp has to shut down. That's
why I trigger a scene change (DMX 5 is the dimmer which then gets set to
dark) over the I/O port. When the people switch the light off - that will
usually be after a while - the dimmer gets restored to his previous state.
But I think it's not so tragic to set the dimmer to 255 since there has been
a break in the color sequence anyway, nobody will notice.

On our server I've written a few perl scripts that do the translation from
proxy's statistics to HSI-Colors and again to RGB and CMY(K).... I you're
interested - I've written another simple script that works as a HTML front
end to Lanbox's telnet interface. I give it to you under a GNU license ;-)

Ok. Thank you again. May be you know a better solution - I can live with
this one.

Cheers
Philipp


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