Pannellum: Is there support for partial / cylindrical panoramas?

[fuzzybabybunny]

Does this support partial panoramas such as 270 degree panos that also don't extend completely to the top or bottom?

[mpetroff]

There is support for partial panoramas, but only if they are in an equirectangular projection. See the haov, vaov, and vOffset parameters.

[DDvO]

I meanwhile managed to generalize the generate.py script to support cylindrical input and to adapt the Python and JavaScript sources to support partial panoramas (from both equirectangular/spherical and cylindrical input) without wasting space and communication bandwidth on tile files that represent areas never shown. I can share the details in case you're interested.

Here is an example partial cylindrical pano generated this way.

[jens-eggers]

Hi @DDvO ,
I really like your work on cylindrical panoramas for pannellum looking at your page!
I also have a lot of these source files, did you manage to enable pannellum to accept these? How can I adapt these changes, that would be very interesting. Can you please share the details?

[DDvO]

Hi @jens-eggers , pleased to hear.
All right, today I've started setting up a series of pull requests that touch various more or less independent aspects of the extensions I made for supporting partial panoramas of cylindrical and other types. Here is the first of them: https://github.com/mpetroff/pannellum/pull/562

[DDvO]

I've just extended my PR #570 which concludes the additions needed to support partial / cylindrical panoramas.

[jens-eggers]

Hi David, sorry for my late reply. I will have a deeper on what you have
mentioned during next week. In the meantime I "cheated" a little having a
look at the example you provided, which already helped me a lot on creating
a full 360° cylindrical view. Understanding the parameters was the key.

Thank you very much for your reply, I appreciate it!

Best regards,
Jens

David von Oheimb [e-mail] schrieb am Sa., 17. März 2018,
20:15:

I've just extended my PR #570
https://github.com/mpetroff/pannellum/pull/570 which concludes the
additions needed to support partial / cylindrical panoramas.

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[DDvO]

Hi Jens, you are welcome. Meanwhile the pull request mentioned above is merged, so in my view partial / cylindrical panoramas can now be considered officially supported.

Talking of parameters, the key options of generate.py for cylindrical input are

• --cylindrical (which selects the projection code f4 rather than f1 when configuring nona) and
• --horizon to state the offset of the horizon counted from the middle of the image (which sets the e option of nona), which is needed to avoid bending the horizon.