coordinates
cartesian (x, y)
plane polar (r, θ)
cylindrical (r, θ, z)
spherical (r, θ, φ)
ψ(x, y) =
presets
contours
11 levels
levels from
to
ψ ∈ [—, —]
refit to view
stream surfaces
meridional section
axes
shell outline
face plane
zoom
−
+
(or scroll on the plot)
reset view
Hover the plot for ψ and the velocity there.