Curve
Cardioid
1-cusp · r = R · heart shape
Nephroid
2-cusp · kidney shape
Epicycloid 3
3-cusp · trefoil
Epicycloid 4
4-cusp · astroid's cousin
Limaçon dimple
d < r · convex
Limaçon loop
d > r · inner loop
Spirograph A
k = ²/₃ · 5-fold
Spirograph B
k = ³/₄ · 7-fold
Inner teeth q
1
Outer teeth p
1
Arm d/R
1.00
Color
★ Glow
🌈 Rainbow
↺ Cycling
⊙ Mechanism
▶▶ Normal
▶▶▶ Fast
k =
1
n =
2
period =
2π
θ =
0.000
d/r =
1.00
Presets
— classic curves
p / q
— gear ratio k = p/q
Arm
— pen distance d/R