cullam Bruce-Lockhart wrote:
>>That's wrong: they can and they do. Have you ever been in the Alps? I've often
>> been amazed at in which unlikely places plants still grow happily.
> In general, you are correct. However, I'm doing scenery for
> Newfoundland, where there is almost no soil, just clay and rock.
> Short trees do grow, but once you get a vaguely steep hill, it's just
> rocks. Especially for the rocky coastline, the ability to define a
> steepness threshold, beyond which anything is brown rock, would make
> a huge difference. Obviously, this is not the case for the whole
> world, which is is why I would like to make it an input parameter.
> Leave the default at something normal, and I'll crank it up for the
> work that I'm doing.
I'd like to add a little story to this thread.
Before I started my/our "Landcover-DB"-project (which is already a few
years old) we were having an ongoing dispute about wether the
underlying land cover data or some "tweaking the data"-techniques in
the TerraGear toolchain had been responsible for certain "unexpected
effects" in FlightGear's Scenery.
Finally, to resolve this issue, I stuffed all our land cover data into
a PostGIS database, put a MapServer as a frontend so everyone could
have a look at what's been the actual input to our Scenery processing
(I suspect that hardly anyone did, but that's a different topic ;-)
To put it in different words: What you are planning to do might serve
as s short-term solution, but in the long run I think you're going to
end up in a new flavour of maintenance hell if you're adding techniques
to TerraGear to change the land cover type in the processing stage.
Better change the land cover type accordingly: For areas which don't
have any trees, simply don't use a type that has trees, otherwise you
will, sooner or later, get "unexpected effects" in your Scenery.
Cheers,
Martin.
--
Unix _IS_ user friendly - it's just selective about who its friends are !
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