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Zerosquare

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Posts posted by Zerosquare

  3. Posted · Report reply

    The organizers of the Sillyventure 2013 party (which takes place in Poland) are looking for Jaguar entries to commemorate the console's 20th birthday :

    Dear Jaguar fans !

     

    I am organiser of Silly Venture 2k13 - the biggeST atari demoscene event in Poland, gathering up to 150 atarians from all over the Europe - France, England, Sweden, Germany, Slovakia, Czech and Poland. This year we will celebrate 20th birthday of Atari Jaguar. Due to this special occasion, we want to focus especially on this system - last atari's venture into the hardware market. That's why you can enjoy the

    . If You would like to support us (and this system) and make it very special Jaguar birthday - send us Your intro, demo or game for competitions! For more infos take a look at our official SV2k13 website:

     

    WWW.SILLYVENTURE.EU

     

    And click "COMPOS" button to read competition rules or "CONTACT" to ask me for more details.

     

    Best regards,

     

    Grey / Mystic Bytes

    SV2k13 organiser

    POLAND

  14. Posted · Report reply

    Actually, it's explained here in the description :

    Basically, the idea behind it is very simple : it uses a special kind/setting of oscilloscopes named "waveform monitor", which is used a lot in video production to check a video luminosity (luma) levels. For each line of the original picture, the electron beam of the oscilloscope draws a line of the pixels' luminosity. So if you want to obtain a picture on the waveform monitor, you need to pay attention at the luminosity and horizontal position of the pixels, the vertical position is irrelevant. This demo also makes a clever use of analog glitches of waveform monitors that are not correctly simulated in this video, and generate grayscales on the waveform by duplicating pixels of the same luminosity on the original video.

     

    The second part is a bit trickier, high luma pixels are used on the video to make an animation, and low luma pixels are used to show another animation on the bottom of the waveform monitor. By modifiying the setup of the oscilloscope to zoom on the lower part of the waveform, you can create the illusion of a second screen !

    So they're not using a "standard" oscilloscope, as it would be impossible since it needs at least 2 different signals (X and Y ; otherwise you would just get a diagonal line). They're using an oscilloscope which has a special mode that causes it to render the video signal differently.

     

    The "dual screen" feature is a simple trick, and almost cheating (;)) : the two screens are calibrated differently, so each of them show a different part of the picture. In theory you could do the same thing with standard TVs or video monitors, but you would need to make the image twice wide (or as high), and normal screens don't allow such extreme ratios, unlike oscilloscopes.

     

    It's still impressive of course B)

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