Vogel’s model is closely related to the Fermat’s Spiral. Instead of continuously drawing the spiral curve, Vogel’s model draws dot in constant spacing. The constant space used in Vogel’s model
Epitrochoid to Epicycloid is similar to Hypotrochoid to Hypocycloid. Epitrochoid is a generalization of Epicycloid where the tracking point can lie inside or outside the rolling circle. Animate the drawing