> I'm fine with the current shape. Thanks. Maybe the same
> discussion applies to polygons. (cf. poly_overlap)
It indeed does. I am incorporating.
> line_closept_point asserts line_interpt_line returns true but it
> is hazardous. It is safer if line_closept_point returns NaN if
> line_interpt_line returns false.
Yes, it makes more sense. I am changing it.
>> > I understand that we don't need to consider NAN is equal to NAN.
>> > circle_same, point_eq_point, line_eq no longer needs such
>> > change?
>>
>> I though it would be better to consider NaNs equal only on the
>> equality operators. That is why only they are changed that way.
>
> I'm convinced by that.
Great. I am documenting this decision better on the patches.
