Module plotdot 

Concentric plot-dot shading (xenopict PlotDot semantics).

Keep in sync with python/xpict/draw/plotdot.py.

Structs

PlotDot

Map z ∈ [-1, 1] to concentric (radius_frac, color_z) rings.

ShadeDisk

One disk before paint: radius fraction in [0, 1], color stop in [-1, 1].