I agree with Nick’s statement of what the expected behavior, and yes this is mostly
about what happens when either the minValue or maxValue is missing.
The Range Node is about mapping one range to another, but especially allowing
the ability to select a floating range including negatives and map it to a different
floating point range. so a {-1000,1000) should be able to map to a {1000,3000}.
In this case, the scale=1, but the other term is { in + 2000 } to offset to the right place
in the new range. Doug’s modified eqn would just echo the ‘in’ value and clamp it against
the MIN or MAX. This is still the wrong result. Nick’s modification also only focuses on ‘scale’
when both scale+offset are needed.
The ‘special math’ at the end for missing entries does not do this.
I still recommend
A) deleting this ‘missing elements’ section and requiring all four entries and indicating CLAMPs explicitly.
B) creating a RANGEF node that mandates only the basic equation and no missing entries for floating point.
Jim