Makie.jl: Polar axis plan

[asinghvi17]

• Compute datalimits (x, y) -> (r) - theta is 0-2pi no matter what
• Optimize ticks for r
• Plot circles at each tick (lines(Circle(0f0, radius)))
• Plot (1) linesegments going from the origin to the thetas. Let thetas be configurable by ticks.
• All thetas in radians.

• Annotations for:

  • thetas
  • rs

• If you want different coordinates - wrap them in CoordinateTransformations.jl

• wrapper types Radii and Angles for arrays so they can be decomposed?

[asinghvi17]

First polar axis prototype:

sc = Scene(scale_plot = false)

rs = 1:5 .|> Float32
θs = 0:π/4:2π

rmax = maximum(rs)

for r in rs
    lines!(sc, Circle(Point2f0(0), r))
end

anglelines = zeros(Point2f0, 2*length(θs))

for (i, θ) in enumerate(θs)
    anglelines[i*2] = Point2f0(rmax * cos(θ), rmax * sin(θ))
end

linesegments!(sc, anglelines)

tickbuffer = TextBuffer(sc, Point{2})

# TODO draw theta-ticks
# TODO draw r-ticks
# TODO theme

[asinghvi17]

Theta tick labels:

[asinghvi17]

Only problem remaining is r-ticks - and what we want to do with them. Should we decrease the default number of ticks from 4? I feel like it looks a bit crowded now.

[BeastyBlacksmith]

I would remove the x/y-coordinates and make r-ticks what is now x-ticks

[asinghvi17]

Oh yeah, that's just because I'm plotting the polar axis on an Axis2D. It'll be removed when the axis is integrated.