Odd calculated deco "ripples" (was Re: RFC: color change for calculated deco)

[Dirk Hohndel]

"Robert C. Helling" <helling at atdotde.de> writes:

> On Jan 14, 2013, at 1:50 AM, Linus Torvalds wrote:
>
> Good morning!
>
>> Anybody who as a 32-bit build environment all set, and willing to just
>> do a search-and-replace of "double" with "long double" in the deco
>> code? Do the ripples go away?
>
> I just checked, I have lost my account at the Max Planck Institute where that might have been possible.
>
> In any case, I would be very surprised if floating point noise is responsible for this as it is too regular (and as you point out likely to be related to the sample rate).
>
> My plan is to devote my lunch break to this. Currently my money is on a problem either with plotting or with the calling pattern (maybe add_segment() is not really called once of every second of the dive but for those seconds that hit a sample point or something similar?!?).


That could be. Maybe the boundaries aren't done correctly in my code. I
wonder if I am missing the last second of some intervals (or count them
double or something)?

/D