Number Wiggle: Amplitude vs Persistence about animation_nodes_manual HOT 4 CLOSED

Persistence is the magnitude of the smaller waves/details while the Amplitude is the magnitude of the first octave, that is, the biggest wave. Does that make sense?

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Persistence is the magnitude of the smaller waves/details while the Amplitude is the magnitude of the first octave, that is, the biggest wave. Does that make sense?

Thanks, though sorry not yet or not entirely clear at least. May I reword it at a high level to confirm if I am even on the right track.

Persistence is like a threshold - which determines the minimum point at which (smaller) waves can first appear?

Amplitude is the maximum 'size' the wave can reach? Amplitude, I think is clearer to me.

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No, not exactly. The wiggle node evaluates what is known as a perlin noise. A perlin noise is a function composed of random value smoothly connected to each other forming something like a random wave. The amplitude of the noise is the maximum random value possible (And negative the amplitude is the minimum random value possible). Now, to make the noise more interesting, the wiggle node add multiple perlin noises over each other, each one is called an Octave. An octave usually have a higher frequency than the previous octaves. Moreover, each octave—being a perlin noise itself—have an amplitude that is proportional to the Persistence value. Thus we can say that the persistence is the constant of proportionality of the amplitude of the octaves. In conclusion, you can think of octaves as level of details and the persistence as the effect of each octave to the final function.

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Thank you. I can review this again, and try to make sense of it.

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