GF display on top of the dive profile

[Chirana Gheorghita Eugeniu Theodor]

I am ok with that but:
1. It would be possible to select the gf value from the computer using code
, because the code already knows, or it can be made to know, which
computers use gf. If the computer does not use gf than , ok, display the
default.
2. Selecting gf globally from prefs for all dives is not possible on mobile
version and again I see it  a bit not very logic even in the desktop
version because in 1 dive someoane may use 40/80 and at another dive , same
diver, might use 55/90 or anything else. Or even change the gf during the
dive to compensate for some issues and adjust the plan and still be in a
somehow safe zone (As the shearwater can)

So is this a feature to be considered? To have each computer in the
libdivecomputer devined with has or does not have gf reporting capabilities
and if the computer has and reports the gf in the dive data take that value
and display it? If the value changes during dive do something like it is
done with the gas change and display gf modify icon and display the new gf
from that point on? And of course adjust the info in the displayed profile
based on the gf reported.

Maibe I am wrong with the above theory but the actual implementation and
how the gf is treated and not interpreted from actual, reported or not by
the dc, seems a little too hazy :).

On Fri, May 27, 2022, 23:35 Robert Helling <helling at atdotde.de> wrote:

> Hi,
>
> On 27. May 2022, at 20:53, Chirana Gheorghita Eugeniu Theodor via
> subsurface <subsurface at subsurface-divelog.org> wrote:
>
> For a while I want to ask here if it would be possible and more logic to
> display correctly the GF used by the computer instead if the 30/75 that is
> displayed on top of tge dive profile (cannot figure out why it is displayed
> and based on what). See attached screenshot. In this dive the petrel was
> using 40/80 not 30/75….
>
>
> only a fraction of dive computers use gradient factors at all and transfer
> them with a log. Therefore, Subsurface cannot by default use the dive
> computer’s gradient factors. Even more, you might want to look at the
> ceiling of a dive with a different set of gradient factors to investigate
> how much wigging room your ascent actually had. Therefore, we decided that
> the user can set the gradient factors used to display the computed ceiling
> independent of the dive. You can set them to your favourite values in the
> preferences (under tech setup).
>
> Best
> Robert
>
> PS: The planner has its own set of gradient factors.
>
>
>
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