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 Add infobox Target arrival altitude (QNH)
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mana
Pulcino

21 Posts

Posted - 16/05/2020 :  19:59:36  Show Profile  Reply with Quote
I'm trying to display the QNH arrival altitude of the target selected in the Multitarget (the Right Bottom Overlay displays the target altitude above the safety height but I also want QNH). After trying all infobox settings and looking in all the manuals for “arrival altitude” and QNH, I did not find a way to display in an infobox the Target QNH arrival altitude.

Is there an infobox I missed?

I may try to add an infobox in the code, do you have high level recommendations on how to do that? I assume the code would be in LKProcess.cpp, but I'm not sure where to declare a new index for the extra infobox.

Last, what is the infobox name of the Right Bottom default value? (it is not NxtArr)

brunotl
Pterodattilo

France
705 Posts

Posted - 18/05/2020 :  12:34:09  Show Profile  Reply with Quote
- arrival is altitude QNE altitude.
- default Right-Bottom default is "LK_NEXT_ALTDIFF" ( "Next Alt.Arrival" / "NxtArr" )

Edited by - brunotl on 18/05/2020 12:34:32
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mana
Pulcino

21 Posts

Posted - 18/05/2020 :  18:53:37  Show Profile  Reply with Quote
Merci Bruno. I had tried to add "Next Alt.Arrival" / "NxtArr" in an infobox, and it matches the Right-Bottom overlay *if* the Multitarget is set to Task. If I move Multitarget to anything else e.g. Alternate 1, then the infobox NxtArr continues to give the arrival altitude of the next Task waypoint, not of Alternate 1. I can keep looking in the code, but if there is another Infobox used for the Overlay, I could use that one as a basis to modify the code to add the altitude of the selected waypoint to the arrival altitude in order to display the QNH. Incidentally it is the behaviour of the xcsoar "Next Altitude Arrival" that points to what is defined as target/GOTO, which I find more natural than limiting Next Alt Arrival to next task waypoint only. (same applies to the other "Next": Next Alt.Required, Next Arrival Time etc).

This leads to a new inquiry, probably better suited for the "Change Request" subforum, I would suggest to change the behavior of the Next infoboxes to match the Multitarget - should I make a new post there?

BTW, the Multitarget feature is awesome!
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brunotl
Pterodattilo

France
705 Posts

Posted - 18/05/2020 :  22:56:03  Show Profile  Reply with Quote
"multitarget" alt arrival is in overlay, you want to display the value twice ?

right, default overlay data like "Target Distance" and "Target Alt Arrival" is not avialable for user defined field ( only "Target Req.E" is available ).

could be added...
to find the related code look arround "OvertargetMode" in "LKProcess.cpp" and "LKDrawLook8000.cpp"

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mana
Pulcino

21 Posts

Posted - 18/05/2020 :  23:20:54  Show Profile  Reply with Quote
Super, thank you very much for the pointers. I want to keep the overlay value as it is on Right-Bottom and add an infobox with the same value, but QNH (vs. arrival above safety of the overlay).
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