The concept can be extended to any number of dimensions. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page . The thing about continuous noise functions like Perlin and Simplex is that they are deterministic, noise is not random.What most noise implementations use is a Seed value that offsets into the noise generated which makes Seed=1 different from Seed=2. To make this range visible, TextureCreator.FillTexture has to scale and offset the noise samples so -1 becomes 0, 0 becomes 0.5, and 1 stays 1, but we shouldn't do this when using Value noise. Standard Perlin noise is periodic with a period of 256 on each axis but you want a modified noise with a smaller period. But the thing is, perlin noise doesn't have to be two-dimensional.

Perlin noise is a draft programming task. \$\endgroup\$ – Nathan Reed Feb 10 '12 at 6:52 \$\begingroup\$ @Nathan Reed If you call noise2 as suggested, you will get periodic results, whether the function itself is periodic or not. Works nice, but it's worth noting that the values seem to form normal distribution (I was expecting homogenous distribution form Perlin noise, but maybe I'm wrong?). Now, if you image-search for perlin noise, what you'll usually see is the graphical representation of a two-dimensional function, where lighter pixels correspond to higher values at particular x and y coordinates. Ideally, its range is -1–1.

Spectrum for values on 1000x1000 grid: to 0.1: 30 to 0.2: 4490 to 0.3: 60639 to 0.4: 163112 to 0.5: 271021 to 0.6: 273415 to 0.7: 163795 to 0.8: 57599 to 0.9: 5728 to 1.0: 171 I solved the 2nd problem where the noise clings to the top left corner. Find a C# implementation of Simplex Noise, it's like Perlin but better behaved and faster.
Indeed, Perlin noise can procude both positive and negative values.


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