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I think it depends. In the context of a complex mathematical formula, where you have many intermediate results with very abstract meanings, I think it's more clear to use a single character name than to try to be descriptive with something like: `productOfLuminanceAndDotProductOfSurfaceNormalAndLightDirectionDividedByScatteringConstant`.

I think there are a lot of advantages to abiding by styling conventions and using linters to set a baseline, but there are always exceptions to the rule.

* productOfLuminanceAndDotProductOfSurfaceNormalAndLightDirectionDividedByScatteringConstant*

Note that the id-length rule also allows you to limit the maximum length of a variable name. This is why.

I understand that, but what in your mind would be a good replacement to name such a complex, abstract value? A long acronym perhaps? I don't see how that's any more clear or less arbitrary than a single character name.

Agreed. I'd much prefer something along these lines as opposed to using an overly long name:


/* product of luminance and dot product of surface normal and light direction divided by scattering constant */

const prod = ...


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