improve AGL interface e.g. from Sonar

[TobiasMue]

with the sonar_distance being part of ABI it is not possible anymore to asses it directly from the flight plan...
would be great to have something like GetPosAGL()
AGL could or should be part of the state interface or ins?

[flixr]

Immediate problem of sonar distance solved with e406aba
Would still be nice to have some more genric AGL value in the state interface...

[gautierhattenberger]

indeed state interface is the correct place to hold the AGL value, but the state itself should be update by the INS and not directly by the sensors. So we should finally have:
AGL sensor -> INS -> state interface -> control, navigation, ...

[gautierhattenberger]

now there is also the agl_dist module (http://docs.paparazziuav.org/latest/module__agl_dist.html). Maybe not as nice as being integrated to state interface, but is it enough to close this ? at least for next milestone ?

[TobiasMue]

so you want to close this just to open new one? thats fine with me - but then we should have at least an example how to access AGL in flight plan...

[gautierhattenberger]

There is now an example in the flight plans (conf/flight_plans/competitions/IMAV2014_vision.xml)
Closing issue.