Any suggestions/implementation strategies for irregular x/y matrices?

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Any suggestions/implementation strategies for irregular x/y matrices? I have an array of APA102s shaped like a heart and I’d like to address it as a “masked” grid.

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https://plus.google.com/+GarrettMace/posts/HKsZNY7avkG
https://macetech.github.io/FastLED-XY-Map-Generator/

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Perfect, thanks!

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Would love to see your heart when you get it going.

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http://www.elec-tron.org/?page_id=1351

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Here’s code for the heart shaped matrix I made last year https://github.com/LmnoZ/BrightTop?files=1

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