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Hi so I'm in trouble a bit. I've been following this tutorials: https://processing.org/tutorials/pixels/ and I'm getting a bit of trouble to understand how to transform a formula in processing code. Looking the code from the tutorial I only see short cut codes to make a exact image processing but I can't see the actual formula like in C/C++ ..etc cos, sqrt..etc I got few complex formulas and I can't understand how to use them to process my image, any help with that?
I know many of you will ask me "give us your formula" but until giving the formula can you explain me how I could use one here, give me an example of a simple formula so I could understand.