I Can't Understand How Is_equal_approx Works!

Question

Can someone explain to me how the isequalapprox method works? I've read the documents, but I couldn't quite understand how it works, especially regarding the function parameters.

Answer 1

Floating Point Imprecision

It turns out that most fractional decimals cannot be represented precisely in binary and so there are a lot of fractional decimals that are approximated when stored in the computer causing what is known as floating point imprecision

How then do you decide that two floating points shall be considered equal?
That's called an epsilon (Greek Letter) which is used by Is_equal_approx and the function name is self explanatory hence the vague documentation.

Is_equal_approx(1.333333333, 1.4) # yes it is

Same should apply for Rects, Basis, Vectors, Transforms

Answer 2

Hi
the function will return true when a and b are equal or only have a very slight deviation.

The tolerance scales with size of the numbers. Higher numbers are treated with a higher tolerance when compared.