Fermat's spiral is also known as a parabolic spiral. Vogel's model mimics the way nature builds flowers using the fibonacci series. It is the most effective way to pack seeds in a flower. It's rotational angle is based on the golden angle.

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**Fermat's spiral** is also known as the *parabolic spiral*. Vogel's model mimics the structure of natural flowers, such as sunflowers. The two spirals follow the fibonacci series. It is the most effective way to pack florets or seeds in a flower. Fermat's spirals rotational angle is based on *the golden angle.*

**Experiment** changing the values to explore the spiral formationi. Increase radius to mimic petal formation. Shift+F5 will reset values. Formula used follow these principles (plus some smart scaling for better looking results):

radius = squareroot(frame-number*seed-number)

thi = frame-number*seed-number*golden-angle

x-coord = r * sin(thi), y-coord = r * cos(thi)

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