Hi Maciej,
Thanks for your recent post. Since no one seems to have replied to your
plea in the final paragraph for software to draw a
stereographic/Oughtred dial, here are some existing open software options:
* Gian Casalegna's _Orologi Solari_ will draw one: azimuth:
horizontal/vertical: astrolabe
*Helmut Sondereggers' _Sonne_ will draw at least a horizontal
stereograph: Azimuthal: Sun Altitude
* Valentin Hristov has written some elegant code for DeltaCad
:www.math.bas.bg/complan/valhrist/az-ht.bas [When I tried to re-run it
a few minutes ago, it now seems to be stuck in a loop which I haven't
had time to debug. I've attached an example which I created about 4
years ago].
So: no need to create a stereograph by hand!
best wishes,
Peter
On 27/10/2022 4:02:34, ml...@interia.pl wrote:
CAUTION: External email. Only click on links or open attachments from
trusted senders.
Dear All,
As proven in a separate tread on "Sun elevation tool/ horizontoscope",
stereographic projection is
a fascinating geometric construction with great potential in gnomonics.
During last year I explored the idea of vertical stereographic sundial
and it resulted in
a paper describing several stereographic sundial types:
- vertical stereographic sundial, for walls of any declination and for
any latitude,
- four-sided stereographic vertical sundial, attractive for its
“gnomon-less” form,
- double – stereographic & polar – vertical sundial for walls of any
declination, a vertical reference to Oughtred’s horizontal design,
- folded pocket, double stereographic & polar – vertical sundial
- inclined, proclined and polyhedral stereographic sundials
The paper can be downloaded free of charge from Cursiva publishers
website:
http://cursiva.pl/e-ksiegarnia/vertical-stereographic-sundial-properties-construction-and-related-instruments/
<http://cursiva.pl/e-ksiegarnia/vertical-stereographic-sundial-properties-construction-and-related-instruments>
or from Academia.edu website:
https://www.academia.edu/88820719/Vertical_stereographic_sundial_Properties_construction_and_related_instruments
<https://www.academia.edu/88820719/Vertical_stereographic_sundial_Properties_construction_and_related_instruments>
Have fun with it !
Vertical stereographic sundials offer plenty of possibilities for
sundial makers
and I believe might be a very interesting addition to existing sundial
types.
As the geometric construction of vertical stereographic sundials with
CAD software is time-consuming,
it would be great to include it in existing sundial design software.
I kindly ask sundial list members running such software, please
consider it !
Regards,
Maciej Lose
---------------------------------------------------
https://lists.uni-koeln.de/mailman/listinfo/sundial
<https://lists.uni-koeln.de/mailman/listinfo/sundial>
--
-----------
Peter Mayer
Department of Politics & International Relations (POLIR)
School of Social Sciences
http://www.arts.adelaide.edu.au/polis/
The University of Adelaide, AUSTRALIA 5005
Ph : +61 8 8313 5609
Fax : +61 8 8313 3443
e-mail:peter.ma...@adelaide.edu.au
CRICOS Provider Number 00123M
-----------------------------------------------------------
This email message is intended only for the addressee(s)
and contains information that may be confidential
and/or copyright. If you are not the intended recipient
please notify the sender by reply email
and immediately delete this email.
Use, disclosure or reproduction of this email by anyone
other than the intended recipient(s) is strictly prohibited.
No representation is made that this email or any attachment
are free of viruses. Virus scanning is recommended and is the
responsibility of the recipient.
--
https://www.adelaide.edu.au/study/
---------------------------------------------------
https://lists.uni-koeln.de/mailman/listinfo/sundial
