Allow passing a custom epsilon to is_equal_approx() and is_zero_approx()

[Dowsley]

Potential implementation for godotengine/godot-proposals#4425

This needs default arguments so its rebased off of #95017. So it needs that merged in first.

This effectively allows is_zero_approx to optionally receive a custom epsilon - allowing backwards compat.

And also adds is_equal_approx_custom_epsilon (surely we can improve this name) binding, that is basically an alternative to is_equal_approx if programmers wants to specify their own epsilon.

Example usage:

Doc changes:

• Production edit: This closes Allow passing a custom epsilon to is_equal_approx() and is_zero_approx() godot-proposals#4425.

[AThousandShips]

This still breaks compatibility in a bad way because we can't bind compatibility methods for these cases, meaning it will work with GDScript but only GDScript, so this also needs that functionality to be added before this can be accepted (or existing GDExtension binds will break if they were compiled before this change)

[Dowsley]

needs that functionality to be added before

@AThousandShips You're talking about default arguments, but for compat methods? Or something else?

[AThousandShips]

I'm talking about that this needs compatibility methods/binds which aren't implemented for these areas yet

[Dowsley]

I'm talking about that this needs compatibility methods/binds which aren't implemented for these areas yet

Understood, thanks. Is there any ongoing effort to solve this, or at least an Issue tracking it?

[AThousandShips]

Not that I am aware of, the demand is very low and I think the solution is pretty complicated to implement