Rotating polar plot coordinates?

[rfritz]

Enhancement request

I recently tried using GR via Plots.jl to produce a polar plot of luminaire photometry. I was quite surprised to discover that there no way to change the polar coordinates used by GR. No matter what I did, 𝜃 = 0° was always at the right of the chart and type C photometry is usually presented with 𝜃 = 0° at the bottom.

So this is a request for the ability to rotate the axis of the polar graph.

Dan, over on the Julia Discourse board, provided a Julia function which made it work, and so I have graphs to present, showing what is currently supported and what I actually wanted.

What I could get from unmodified GR:

What I wanted:

[jheinen]

Thanks for the FR. We will support this with the next release.

[AhmedSalih3d]

First and foremost; @jheinen thank you for the great work you are putting into this library!

Can I ask if this has this been natively implemented?

I stumbled upon this today and was surprised I could not do it

Kind regards

[jheinen]

In GR.jl, you can now set an offset ("E", "N", "W", "S") and the direction (1, -1):

using GR
angles = LinRange(0, 2pi, 40)
radii = LinRange(0, 2, 40)
polar(angles, radii, theta_zero_location="S", theta_direction=-1)

[AhmedSalih3d]

In GR.jl, you can now set an offset ("E", "N", "W", "S") and the direction (1, -1):

using GR
angles = LinRange(0, 2pi, 40)
radii = LinRange(0, 2, 40)
polar(angles, radii, theta_zero_location="S", theta_direction=-1)

Thank you that is amazing! I suppose the issue can be closed then, seems to satisfy @rfritz original request?

As a side-note; how did you get such a pretty font in the plot / how would I do that?

Kind regards

[jheinen]

This is the default font in GR: Computer Modern

[rfritz]

That is marvelous news. Thank you!

On Sun, Apr 2, 2023 at 2:01 AM Josef Heinen ***@***.***> wrote: This is the default font in GR: Computer Modern <https://en.wikipedia.org/wiki/Computer_Modern> — Reply to this email directly, view it on GitHub <#168 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACDNUR7AG3XFTRC256A7BLW7E56HANCNFSM6AAAAAATKBJBBU> . You are receiving this because you were mentioned.Message ID: ***@***.***>

-- -- Randolph M. Fritz || ***@***.***