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Mathf.PerlinNoise function, source code, question on 2D-3D implementations.

Discussion in 'Documentation' started by OsvaldonLT, Feb 19, 2018.

  1. OsvaldonLT

    OsvaldonLT

    Joined:
    Feb 19, 2018
    Posts:
    1
    I have been doing research on Perlin Noise and it's application in terrain generation. I wrote my version of the script in C# based on Perlin's original code (found below), yet I still have a couple of questions on the subject.

    https://mrl.nyu.edu/~perlin/noise/

    1. The script returns values close to those of Mathf.PerlinNoise, but I would like to view the source code of Unity's implementation and learn what causes the mismatch. Is there a way I could accomplish this?

    2. I would like to know whether a correct 2D implementation of Perlin Noise would yield the same results as the 3D implementation, where the z property is always set to a single value (such as 0).
     
    OsvaldonLT, Feb 19, 2018
    #1

  2. Graham-Dunnett

    Graham-Dunnett

    Unity Technologies

    Joined:
    Jun 2, 2009
    Posts:
    4,287
    1. No, we cannot release the Unity PerlinNoise code to you. Sorry.

    2. It depends on how you implement your 3D Perlin Noise. There is a 3D implementation at
    . It's great, but X, Y are all computed, so will be different from the Unity internal calculation.
     
    Graham-Dunnett, Feb 27, 2018
    #2

  3. austin112

    austin112

    Joined:
    Feb 18, 2019
    Posts:
    1
    Maybe a random range to the x y values on function start? Or is that what you meant with the seed? You could do some sin or cos and multiply/ add some more values in to amplify the height differences.








    embarkup embarkdaily
     
    austin112, Feb 18, 2019
    #3