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    michaelsbradleyjr avatar michaelsbradleyjr 3 years ago | link | on: Purely Functional 3D in Typed Racket

    If you jump to 11:52, you’ll see a neat demo that shows off the engine’s performance: 70,000 spheres (ray traced on the card), 500 lights, at 60 frames per second. Great stuff!

    http://www.youtube.com/watch?v=t3xdv4UP9-U&t=11m52s

    The source code is available on GitHub:

    https://github.com/ntoronto/pict3d

    1. 1
      michaelsbradleyjr avatar michaelsbradleyjr 3 years ago | link | on: Infinite Functional Entertainment at 60 FPS!

      Source code for the demonstrated Get Bonus game engine:

      https://github.com/get-bonus/get-bonus

      1. 3
        puffnfresh avatar puffnfresh 5 years ago | link | on: Lenses In Pictures

        For anyone interested, I wrote a lens library for JavaScript a few days ago:

        https://github.com/puffnfresh/fantasy-lenses

        The first example can be written like so:

        var locationX = location.andThen(x);
locationX.set(locationX.get() + 10);
        1. 1
          michaelsbradleyjr avatar michaelsbradleyjr edited 5 years ago | link

          Michael Greenberg also published a JavaScript lenses library back in 2007, as part of his thesis at the University of Pennsylvania:

          http://www.cis.upenn.edu/~mgree/ugrad/lenses/docs/overview-summary-lens.js.html

          It’s a bit dated now, to be sure, as there have since been many developments in the field of “bidirectional programming”. See, for example, Daniel Wagner’s paper on “Edit Lenses”:

          http://dmwit.com/papers/201107EL.pdf

        1. 1
          michaelsbradleyjr avatar michaelsbradleyjr 5 years ago | link | on: Show Lobste.rs: "yin-yang" call/cc puzzle ported from Scheme to JavaScript

          I’ve just revised the gist, in case anyone is interested. I decided to decouple the sync and async variants as I had done originally, so that it’s hopefully a little easier to follow and play with.

          1. 1
            michaelsbradleyjr avatar michaelsbradleyjr 5 years ago | link | on: JavaScript Control - lies and wizardry

            The video starts off a tad slow as Perrin finds his legs, but at ~2:30 the pace picks up and he begins to demonstrate the amazing tool he’s been developing.