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Setting AVars within a Simconnect gauge

T

taguilo

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Hi,

It seems that AVars which depend on many other var sources are not possible to control just by using Simconnect in a regular gauge.
As the assignment occurs at the end rather than at the beginning of a frame (as per SDK), the variable is indeed actualized, but it is overwritten again by FS's own calcs previous to show its value in the panelset. :confused:
I've found this oddity working with Turboprop engine vars like PROP RMP, CN2, etc.
Has anyone succeeded in controlling any of these ones?

Tom
 
JB3DG

JB3DG

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I havent had any problems executing the SetDataOnSimobject from the gauge callback function which runs at 18Hz...I imagine that since it is being executed with each gauge rendering cycle that it keeps everything in sync.
 
Last edited:
ddawson

ddawson

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Tom,

I think this is really a matter of what variable you are trying to set. As you have discovered, some variables are immediately recalculated by the sim, so setting them to a desired value has no useful effect. Others will "accept" a set value and can be controlled by the programmer. I would presume this has either to do with how frequently the sim updates them, or where they are in the chain of calculations being done.
The only wisdom seems to be experiment until you find the one that drives the effect you are looking for.

Doug
 
T

taguilo

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Yes Doug, it's like that. Those variables that depend on themselves, or maybe on single table results, for example CN1, Battery, Fuel Quantity, etc, are easily settable. Others, like PROP RPM, are useless to assign as they are constantly calculated from different tables and factors. I wonder the reason for making them "settable" if you can't make an effective use of this property on them:confused:...unless there is a trick to make them work that I'm missing, and so the reason for my question.

Tom
 
n4gix

n4gix

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Tom, keep in mind that the main purpose of "settable A:vars" was to synchronize a remote aircraft's instruments with the PIC's panel/gauge system when in Shared Cockpit mode...
 
T

taguilo

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Thanks Bill, I didn't know that. :)
Still making test, with good and not so good results...

Tom
 
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