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    From abhominal
    Biostructure
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    Now playing SpaceCollective
    Where forward thinking terrestrials share ideas and information about the state of the species, their planet and the universe, living the lives of science fiction. Introduction
    Featuring Powers of Ten by Charles and Ray Eames, based on an idea by Kees Boeke.
    Wed, Aug 18, 2010  Permanent link

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    Wed, Aug 11, 2010  Permanent link

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    This video took me 6 hours to squeeze over Comcast DSL, only 60M.

    Tue, Jun 22, 2010  Permanent link

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    Sat, May 29, 2010  Permanent link

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    Sat, May 22, 2010  Permanent link

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    Sun, Apr 25, 2010  Permanent link

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    I've finally figured out how to use public source hosting, and I have set up a visualizer program I am working on at bitbucket, which uses the mercurial version control system.

    The project code lives at
    http://bitbucket.org/mrule/perceptron/

    And a tentative (because its not very useful yet) documentation page has been set up at
    http://perceptron.bitbucket.org/


    I think bitbucket will faciliate group editing. I can add editors and administrators to these projects, if people have bitbucket accounts. You can also pull or download copies of the source code, which seems to build correctly on Ubuntu/OSX with java, javac, ( and gcc but thats not really needed ) installed. I think, even if you're not an editor you can propose contributed changes.

    Anyway, Gamma can doubtless warn you that this code is a monstrosity and should... probably not be looked at until I can get some reasonable documentation written.



    Update : Here is a flowchart of the feedback rendering framework. I think it should be possible to convert this to a single shader program, with the possibility of supporting dynamic code modification by chaining lists of operators together.

    Fri, Apr 9, 2010  Permanent link

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    Simulated patterns for 5,6,7, &11 plane waves :


    This is a diffraction pattern of a real 3D quasicrystal. For a 3D crystal, the diffraction pattern is also three dimensional. All of the rendered images here are for 2D quasicrystals with 2D diffraction patterns.


    Here is the spatial domain of a quasicrystal formed by 8 plane waves, spaced at even rotations, in a plane. This coloring was achieved by squaring the sum of all 8 waves at each point, then normalizing the whole image, then inverting the colors.


    Here is a 5-fold 2D quasicrystal spatial domain. This pattern is related to Penrose tiling, I believe.


    Here is a 7-fold 2D quasicrystal spatial domain


    Edit : comments have indicated that systems of overlapping plane waves might not exactly be a quasicrystal, since they don't exactly have well defined lattice "points". So, I thresholded 5 summed plane waves to generate the following point distribution. The Fourier transform of this lattice looks more like what one might expect for a crystal.



    &FT:
    Thu, Apr 1, 2010  Permanent link

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