Polar curve / 06

Radiating Figure-eight

Geometry

A polar curve r(θ) = A·cos(k·θ). With k = 2/3 it traces a four-petal rose — the “figure of eight” from the source page — over θ ∈ [0, 2π·revolutions].

The radius breathes between pulseMin·A and A, so the curve radiates outward and then contracts inward again.

Shape & appearance

Radius now100 Outer radius A (max) Fold k Revolutions Inner pulse Rate increment Speed × Line spacing Zoom Line width Base colour Auto-sweep outer radius

Saved PNGs

PNG captures are named with their parameter values. Commit the downloaded files to the repo and they will appear here automatically (fetched via the GitHub API).