John Tsiombikas
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    • My FOSSCOMM 2015 Programming for Virtual Reality talk (in greek) - Duration: 32 minutes.

      • 1 week ago
      Video capture of (most of) my fosscomm 2015 talk: Programming for Virtual Reality. The talk was in Greek, so sorry to any of you non-greek speaking viewers, but you aren't missing much. It's just a...
    • Silly Halloween-themed OpenGL demoeffect - Duration: 4 minutes, 9 seconds.

      • 3 weeks ago
      Silly & boring halloween-themed OpenGL "demo"-effect for the DBF Halloween 2015 competition.
      Download links (source code and binaries for linux/windows/mac): http://nuclear.mutantstargoat.com/sw/db...
    • Zilog Z80 microprocessor chip test circuit - Duration: 81 seconds.

      • 1 year ago
      Minimal test circuit for a Z80 microprocessor chip. The data lines are pulled to ground to emulate reading a string of NOPs from memory, and the clock is pulsed manually to single step fetching and...
    • Singing Blind Guardian's The Bard's Song In the Forest (literally) - Duration: 104 seconds.

      • 1 year ago
      Let us ride to Livadia...
      ... on second thought let's not go there, it is a silly place.
    • Affine vs perspective-correct texture mapping example - Duration: 64 seconds.

      • 1 year ago
      Crappy hack, showing the notable difference between affine texture mapping, and perspective correct texture mapping.

      Based on my crappy (and unfinished) MS-DOS software rendered first person dunge...
    • 3dfx Glide retrocoding - Duration: 26 seconds.

      • 1 year ago
      3dfx glide retrocoding :) Why?
      When I was starting to get into accelerated 3D graphics programming back in 2000-2001, I used to have a 3dfx Voodoo 2 GPU (we didn't call them GPU's back then of cour...
    • Decoding PWM signal from an R/C receiver. - Duration: 114 seconds.

      • 2 years ago
      This video shows an experiment I did, to try and use R/C receiver servo PWM signals, as input to an AVR microcontroller. In this case the microcontroller just prints the input value and pulse width...
    • Absence / The Lab (demo) - Duration: 3 minutes, 32 seconds.

      • 2 years ago
      Absence was the first released demo of my old demogroup: The Lab. It came 3rd at the ReAct 2003 demo competition.

      This was the only demo I've ever written that was "windows only", using my old Dir...
    • spnavcfg2 visualization preview - Duration: 50 seconds.

      • 2 years ago
      I'm writting a new version of the spacenav[1] GUI configuration utility, which will include a real-time visualization of the device input affected by whatever options the user is tweaking interacti...
    • Raytracing example - GPU version (GLSL) - Duration: 45 seconds.

      • 2 years ago
      GPU raytracing example program from my fosscomm 2013 talk on parallel programming.
      Running on an nvidia geforce 650 Ti.

      Source code: http://nuclear.mutantstargoat.com/talks/fosscomm2013/gpu_......
    • Fun with software 3D rendering in MS-DOS (real-mode) - Duration: 85 seconds.

      • 2 years ago
      Just one of my retro-coding trips. Wrote a simple OpenGL subset with a really slow floating point rasterizer, and a palette color manager for allocating color ramps for smooth(-ish) gouraud shading...
    • Dungeon crawler game prototype - Duration: 67 seconds.

      • 3 years ago
      Just a prototype implementation, with placeholder graphics, of a first person dungeon crawler game I'm writing.
      Features an OpenGL deferred shading renderer, OpenAL for positional audio and music p...
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