Onion

Onion autodraw is a multilayer using three spines. Starting from a portal, it draws consecutive layers. It does not aim to maximize the number of layers.

There is three variants.

Let it grow

The algorithm adds layers until it's not possible. images/autodraw_onion_grow.png

Equilateral

The algorithm adds layer on the spine that makes the layer closer to an equilateral triangle. images/autodraw_onion_equilateral.png

Balanced

The algorithm enforces a balanced multilayers by throwing from spine 1, spine 2, spine 3, spine 1 and so on. This usually ends with a smaller draw with less layers. images/autodraw_onion_balanced.png