Mathematical Functions and Equations SVG
nextLissajous Curve
x = A·sin(a·t + δ), y = A·sin(b·t).
Polar Graph (Rose)
r(θ) = a·cos(kθ) or a·sin(kθ).
Implicit Curve (Contour at F(x,y)=0)
Using marching squares (d3-contours) to extract the 0‑level set.