PolarAxis ticks

[briochemc]

Feature description

I would like to kindly request an option to display ticks in a PolarAxis. I am assuming ideally that rticks and thetaticks would be controlled through the same options as for xticks, that is through these kwargs:

• rtickalign
• rtickcolor
• rticksize
• rticksmirrored
• rticksvisible
• rtickwidth
• thetatickalign
• thetatickcolor
• thetaticksize
• thetaticksmirrored
• thetaticksvisible
• thetatickwidth

(FWIW I'm coming from #4771 requesting a recipe for Taylor diagrams.)

[asinghvi17]

Mirroring doesn't really make sense for a polar axis I think...flipping might but theta already has a similar thing, so it would just be for r

[asinghvi17]

Alignment is also weird on polar axes

[briochemc]

I'm probably missing something but doesn't mirroring make sense for r as long as theta does not wrap around the full 2pi and for theta as long as the lower limit for r is strictly positive?

[asinghvi17]

That's a good point, if the polar axis does not cover the full angular range then there's room for mirroring in r, and vice versa for theta.

[briochemc]

Alignment is also weird on polar axes

I wouldn't even know where to start, but what is challenging for PolarAxis ticks?

[ffreyer]

Some of the things you listed should be easy to do - they just need to be added to the Block attributes in

Makie.jl/src/makielayout/types.jl

Line 1952 in de99964

@Block PolarAxis <: AbstractAxis begin

and connected to the appropriate plots in

Makie.jl/src/makielayout/blocks/polaraxis.jl

Line 557 in de99964

function draw_axis!(po::PolarAxis)

E.g. color, size, visible, width.

Things like align and maybe mirroring could get more tricky because PolarAxis adjusts align and offset based where the tick label is placed. All of that should also be contained in the draw_axis function though

[asinghvi17]

For theta ticks, for example, alignment is defined based on the angle the tick is at - similar for r ticks also I believe. If you don't do that, then the tick will probably clip into the axis at some angle.

[briochemc]

For theta ticks, for example, alignment is defined based on the angle the tick is at - similar for r ticks also I believe. If you don't do that, then the tick will probably clip into the axis at some angle.

I understand that, but I think those angles are already computed here to place the labels, right? I'm just not sure where this happens, and I'm also lost as to where and what the code for drawing the ticks should be.