hoping someone can point me in the right direction here.

Archive FastLED Archive
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hoping someone can point me in the right direction here. how do you do the math necessary to display something like this on a led matrix? if it was just a simple string of leds, i could see how to do it, but not for a matrix. im rather confused by this seemingly simple thought that i cant seem to find an answer to

5f189e3484a6788895926c14be093a44.jpeg

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Here’s my goto links for this kind of thing:

https://www.bidouille.org/prog/plasma
http://lodev.org/cgtutor/plasma.html

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1-Create a colour gradient that you can index from 0 to X
2-Draw a circle radius Y(initially 1) % (width of canvas) with colour X%(Colour index range)
3-Increment Radius
4-Increment Colour index X
5-Goto 2

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thanks that is fairly simple

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@Andrew_Tuline thank you for your code !! Here is some example running on my panel

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Looks great!!

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Can you share the full sketch @Yves_BAZIN ?

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@Will_Tatam of course when back home I will publish it

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@Will_Tatam here it is https://gist.github.com/hpwit/5b9df75a0aae6dcb7387e3ea2ae1075f

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Here’s my own 1D version:

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The math is explained here: https://www.bidouille.org/prog/plasma

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Here one of my implementations of it: https://plus.google.com/u/0/115124694226931502095/posts/9kitMZYQA4y