Hi, is it possible to define a gradient Palette at runtime? the DEFINE_GRADIENT_PALETTE uses the program memory. In my situation I want to create a new Palette each frame dynamically, it is for a christmas candle effect where the gradient points are “candles” that change their brigntness based on…

Yes, note the SetupXXXPalette functions in the ColorPalette example: https://github.com/FastLED/FastLED/blob/master/examples/ColorPalette/ColorPalette.ino

To my understanding those SetupXXXPalette functions create CRGBPalette16 objects, where 16 colors have an equal “distance” in the palette, while the gradient palettes define also the control points of the gradients. Sure, I can achieve something with the 16 element palettes but I have plenty of RAM …

Yep, you can do this. Internally, all palettes are CRGBPalette16 (or 256), even the ones defined as a gradient – the gradient is just a convenient and compact way to define them. So. You want this: CRGBPalette16 myPal16; myPal16.loadDynamicGradientPalette( dynPalDef); That will load a gradient…

great - it works - thank you very much!

For anybody curious, this is how I implemented this typedef unsigned char byte; byte bytes[8]; bytes[0] = 0; bytes[1] = 255; bytes[2] = 0; bytes[3] = 0; bytes[4] = 255; bytes[5] = 0; bytes[6] = 0; bytes[7] = 255; currentpalette.loadDynamicGradientPalette(bytes);

This is gold. I was trying to find a way to change the palette at runtime as well, as I have a web app that sends a request to my esp2866 server with the palette… so the palette can be created in the web app with a color picker.

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Hi, is it possible to define a gradient Palette at runtime? the DEFINE_GRADIENT_PALETTE uses the

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marmil (Marc Miller) January 6, 2022, 9:16am 8

Hello @twofingerrightclick

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