Op 14/09/2021 om 01:14 schreef Samuel B.:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> Op 10-9-2021 om 22:36 schreef Samuel B.:
>>> Oh, that reminds me. I know your specialty is more on the geological side of
>>> things, but a great tool has just become available for free: KrystalShaper (
>>> http://www.jcrystal.com/products/krystalshaper/ ) It provides a catalog of
>>> hundreds of minerals, plus tools to analyze and export geometry. Might be worth
>>> checking out.
>> Nice little program indeed! Thanks. Wulff-nets, ha! That was not really
>> my cup of tea... ;-)
> I don't even know a Wulff net is. But based on its appearance, I'm guessing it's
> some sort of mapping between HKL indices and a sphere. Maybe it's a clue to help
> me convert HKL values to planes...
That is correct. It is/was used in crystallography for mapping mineral
indices and do all sort of exciting things, calculating angles and
intersections. Only, as a freshman, I was not particularly interested in
this branch of geology! Hammering away at overturned, anticlinal rock
sections: /That/ was what life was about! ;-)
But seriously, I do not remember how it worked exactly but it certainly
could be of help to you I guess. I still have a Wulff net somewhere
here, gathering dust.
>> The output could be the basis for crystal renders of quality. Not much
>> time at the moment, but I keep in mind.
> What's your camera aspect there? The crystal looks stretched vertically.
For the demo image I didn't bother with the scene details; just used the
standard scene code provided by the app.
> It is a cool program, I just wish I could figure out my HKL issues so I can do
> more with it. (My previous searches didn't turn up much useful info, or maybe I
> wasn't comprehending what I saw...)
I know what you mean. These are a couple sites which explain the use of
the Wulff net. There are more of course, but these are fairly basic.
However, to tell the truth, I remain a bit baffled when I see those
things again, after all those years. I am not really sure I understand;
I think you are more familiar with all this.
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