Having a wave state that gets initialized based on the wind in the first
METAR, and has a huge rate limiter slowing down the visible effects of any
later updates of wind speed, would probably be the most realistic simple
approach for ocean waves. Wind takes some time to build waves, more time
for greater wave height, and waves from a storm continue even after the
wind drops.
If you really want to go crazy, maybe you could base everything on NOAA
wave forecasts:
http://en.wikipedia.org/wiki/Wind_wave_model
But interpolating these with a ~1 hour time constant would still be a good
idea to avoid big jumps.
On Sun, Jan 22, 2012 at 11:21 PM, Curtis Olson <curtol...@gmail.com> wrote:
> Are we fixing the right problem? I was observing mach 5 speed waves while
> the weather wind was changing.
>
>
> On Sun, Jan 22, 2012 at 8:18 AM, Torsten Dreyer <tors...@t3r.de> wrote:
>
>> > Played around with it a bit. I got reasonable "movement" sensation with
>> > wind-filter-time set at ~1000.
>> >
>> > The flutter effect might need the wind in realtime though, as flags
>> > usualy react imediately to wind direction changes.
>> Huh - that's a huge value. With a filter-time that high, it will take
>> approx one hour for the interpolated wind to match the given input.
>>
>> Maybe a rate-limiter helps here. The exponential filter has a relatively
>> high rate of change in the beginning, dropping to zero in infinity while
>> the rate limiter changes the output at a constant rate of change.
>>
>> Torsten
>>
>>
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>
>
>
> --
> Curtis Olson:
> http://www.atiak.com - http://aem.umn.edu/~uav/
> http://www.flightgear.org - http://gallinazo.flightgear.org
>
>
>
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