[PATCH] Planner - change timestep to 2 seconds

[Dirk Hohndel]

On Sat, Jun 20, 2015 at 11:17:28AM +1000, Rick Walsh wrote:
> Change the timestep used to calculate tissue pressures and ascents from 3
> seconds to 2 seconds.  But whats wrong with using 3 seconds?
> 
> Deco stops are at 3 m (10') intervals, and our ascent rate is usually 9 m/s
> (30'/s), or at least multiples of 3 m/s (10'/s).  Hence time to ascend from
> one stop to the next stop is 20 s (or any factor of 60).  Using 3 s
> increments, we round our ascent interval up to 21 s, which leads to messy
> durations and runtimes.
> 
> But what about me?  I like SI units and whole decimals.  Don't worry, 2 s
> timesteps fit nicely when using 10 m/s ascent rate (18 s between stops).

I don't know about you, but when I dive we usually do our ascends a little
slower than this. Something like 20ft/min or so or (coincidence: that's 3s
per foot) but definitely slower than 30ft or 10m per minute. Which means
our 3s intervals give us 1.5ft or 50cm per interval. Is that what you were
trying to express?

I basically understand what the patch does (duh), but the commit message
makes no sense to me...

/D