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Thread: Random Cave Generation

  1. 12-04-2008, 10:26 PM #1
    RobA
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    Post Random Cave Generation

    Inspired by isomage's efforts at random cave generation I did a bit of research on random walks and came across this description on simulating bacteria using random walks with a gradient bias.

    I turned to my trusty swiss army knife, processing and cobbled together a random walk with gradient bias engine....then started building gradients to make gave maps.

    My first experiment was just to verify the algorithm would follow random walk along the gradient from light to dark.

    The gradient:
    Random Cave Generation-grad_guided.png

    and the walk:
    Random Cave Generation-cave_guided.png

    Then I came up with this perlin noise with a left to right bias map:
    Random Cave Generation-noise1.png

    which created this "cave" structure
    Random Cave Generation-cave1.png

    and here is a comparison showing the lineup:
    Random Cave Generation-comp1.png

    I think there could be some promise in this...

    -Rob A>
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  2. 12-05-2008, 02:02 AM #2
    isomage
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    Post

    That does look promising. My maps are made by random walks -- three traces of two-dimensional fractional Brownian motion with different fractal dimensions and independent random skew. Your Perlin map looks like it could have been done with my generator; probably the gradient is providing skew, and the Perlin noise is effectively being summed over successive steps to produce Brownian motion -- the same general effect, but from a much more accessible procedure

    Try compositing multiple walks with different gradients (direction and magnitude) and different noise fields, and you'll probably get results equivalent to mine.

    Nicely done!
    My random map generators and GIMP scripts: http://axiscity.hexamon.net/users/isomage/
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  3. 12-05-2008, 06:33 AM #3
    Steel General
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    Cool stuff guys, even if I only understand a small portion of it.
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  4. 12-06-2008, 06:57 AM #4
    Sagenlicht
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    Question Perlin Noise

    Hmm RobA, could you post your script? I downloaded processing and would like to see an example. Would make starting easier Processing really looks promising.
    Last edited by Sagenlicht; 12-06-2008 at 07:00 AM.
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  5. 12-06-2008, 02:06 PM #5
    RobA
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    The script is for the random walk, not the perlin noise generation

    I have been building noise gradients in gimp and importing them....

    I think there is a better way to do this, I think I'll create a gradient array from the image and switch the whole random walk to vector math...

    -Rob A>
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