>> What's the status of the flat layer on curved Earth problem by the way?

> This should have been fixed since September 12th in git.
>
> https://gitorious.org/fg/simgear/commit/d2dfb81a0907276f36cf7582c4274fa1784972d6
>
> Are you still seeing the problem?


Unfortunately yes. I've pulled and compiled just today, I'm seeing the new
replay system, so I guess there's no chance of me mixing up the binaries.

Do the following test (this is what I'm seeing):

* with the ufo, select any non-scenery intensive area (say, TNCM)
* set hardcoded_clouds_flag = 0 in local_weather.nas
* get any weather tile in 'repeat tile' mode
* fly to the cloudbase, then level off and get going with 6000 kt into any
given direction, keeping your altitude constant

=> after 250 km or so, you are still about at the same cloud base as
originally

* repeat the exercise with hardcoded_clouds_flag = 1

=> after 250 km or so, you are well below cloud base, you can observe as
you go that every subsequent tile is drawn above the last

The increase even appears to be non-linear in distance, getting worse as
you are further and further away from your origin, in agreement with the
expected 1- d^2 expansion of the cosine as you follow the sphere.

Could you perform this test and let me know if you observe something
different?

I have a customized version of FGData, but since the patch is supposed to
simgear, which I use unmodified from the devel version, I can't see that
this is an issue here...

Thanks,

* Thorsten


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