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announcement: here is a new open source alternative to perlin noise: octavia noise it is a lightweight fractal noise algorithm. it is generalizable to n dimensions. it is not based on gridded points, and does not exhibit linear artifacts. (link in second post)

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loren schmidt

@lorenschmidt

this is suitable for terrain and other procgen work where organicity and reducing grid artifacts are important, especially situations where the absence of slope artifacts is important. the initial js implementation takes 4x as long as value noise.

github.com

GitHub - lorenSchmidt/fractal_cell_noise: a fractal noise algorithm most closely related to...

a fractal noise algorithm most closely related to cellular noise algorithms such as worley noise - GitHub - lorenSchmidt/fractal_cell_noise: a fractal noise algorithm most closely related to cellul...

7:39 AM · Dec 4, 2022

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@joeblubaugh@hachyderm.io

@JoeBlubaugh

Dec 4, 2022

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@lorenschmidt

Thanks for releasing this! Would you be open to implementations in other programming languages committed to this repo?

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i'll probably write a glsl one soon, anything else would be welcome! i don't really use github regularly so pardon any lack of familiarity with particulars.

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I think you were asking about sampling slope a few days ago. Does fractal cell noise have a method to get this?

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the other thing i released today is the outcome of that process- it's value noise with a derivative. i have some thoughts about the derivative of octavia noise but i have not implemented anything yet! it does get offsets for every sample as part of value accumulation...

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Awesome, and a great name too! I'm going to add it to my "canvas sandbox" that I use to test my silly ideas, but the noise_seed variable is undefined, I suppose it should be the seed function param. I suggest you add "use strict"; at the beginning to reveal quirks like this.

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oh thank you! sorry, i was transplanting it into a self-contained file from a larger collection of algorithms, my terrain system has a global noise seed. it can be any integer. i'll make it a function parameter and patch it.