lissajous fun

Sep 19, 2010 at 10:12pm

lissajous fun

if anyone knows how to get rid of the occasional tearing effect, please let me know,



Sep 20, 2010 at 8:06am

Sweet – and quite possibly seizure-inducing!
Always been a sucker for Lissajous figures; there’s something reassuringly old skool about them,

Sep 20, 2010 at 11:51am

Hello Oli, nice work!
This looks like the same tearing problem i’m encountering at the moment with my oscilloscope example:
Would be great to see a solution for this problem…
Best Lev

Sep 20, 2010 at 12:02pm

hi Oli, i cant seem to see any tearing here… can u post a screenshot maybe? nice patch BTW

@l3vidius, i think your issue is separate as oli is using openGL to draw the lissajous curves. your oscilloscope draws directly to CHAR matrix. i think you need to slow down the clear bang so it only does it once it has got all the way across the x dim of the char matrix.


Sep 20, 2010 at 1:37pm

it’s like sometimes jit.catch~ misses some samples, resulting in the curve not joining up… it’s a bit hard to get a screenshot unfortunately.

also if anyone has some ideas about how to make this look more like an analogue oscilloscope (shaders?) i’d be interested to hear


Sep 20, 2010 at 2:34pm

haha yeah, i love the look of old scopes… shaders are probably the first place to go, unless u go back to CHAR.
maybe use a combination of shaders, with some modulations to emulate light intensity changes and colour displacement…

vade has some v nice shaders also

i’d love to have a crack at it, but im well busy at the moment! gimme couple of weeks and i should have more free time…


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