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in news:web.606e33cbe8731e13a93e6a71f712fc00@news.povray.org Leroy wrote:
> 'Sample data import'
Didn't know that one, can be useful.
Those martians live dangerously on the wrong side of the road.
Ingo
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https://ingoogni.nl/povray/sounds-of-povray/povray-pluck-string/
Ingo
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ingo <ing### [at] tag povrayorg> wrote:
> https://ingoogni.nl/povray/sounds-of-povray/povray-pluck-string/
I'm still amazed at how cool this technique is. That's a pretty good nylon
string sound!
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in news:web.60709cb0e8731e1387570eabd4644d08@news.povray.org Robert
McGregor wrote:
> I'm still amazed at how cool this technique is.
All the other (basic) techniques are relative simple, the Karplus Strong
is not just only simple, but also so very elegant. I'm still as amazed by
it as the first time I coded it, probably in the day of basic.
Ingo
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in news:XnsACFFA7C775533seed7@news.povray.org ingo wrote:
The ANS syntesizer works,
https://ingoogni.nl/povray/sounds-of-povray/povray-ans/
ingo
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ingo <ing### [at] tagpovrayorg> wrote:
> in news:XnsACFFA7C775533seed7@news.povray.org ingo wrote:
>
> The ANS syntesizer works,
>
> https://ingoogni.nl/povray/sounds-of-povray/povray-ans/
>
> ingo
Very nice. You're making some pretty cool progress :)
"In POV-Ray there is no FFT, so I have to use brute force"
I converted Paul Bourke's c++ code to SDL
http://web.ipac.caltech.edu/staff/fmasci/home/astro_refs/FFT_DFTsummaryAndCode.pdf
http://news.povray.org/povray.binaries.images/thread/%3Cweb.58b813187922eedfc437ac910@news.povray.org%3E/
I would love to have FFT be an internal function. No one saw the value for a
raytracer.
https://ingoogni.nl/contact/
403 Forbidden!
You don't have permission to access the requested object. It is either
read-protected or not readable by the server.
also a bad contact _link_ on the ANS page.
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in news:web.607dbe49e8731e131f9dae3025979125@news.povray.org Bald Eagle
wrote:
> 403 Forbidden!
>
Yes, dunno what to put there yet. Maybe just a link here for now. The blog
won't be all pov-ray, but is for now.
Completely missed your code, I'll investigate. I may have thought it was
about a FFT lib for POV-Ray, or just not pay attention. It can be usefull
on images too, not just sound.
Thanks,
Ingo
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ingo <ing### [at] tagpovrayorg> wrote:
> Completely missed your code, I'll investigate. I may have thought it was
> about a FFT lib for POV-Ray, or just not pay attention. It can be usefull
> on images too, not just sound.
I'll have to check and see if I ever posted the code.
AFAIK, The 1D FFT works just fine.
I also tried a 2D FFT, for use with images, but I never ironed out all the
kinks.
I _think_ it works ok, and I just needed to figure out how to "shift everything
into the center".
Gimme a bit and I will dig up the scene files.
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OK,
Here's the 1D FFT scene.
I removed a bunch of extraneous cruft.
I add 5 sine waves of different frequency to get the black curve.
The yellow lines indicate the frequencies of the component sine waves.
The magenta lines are the output of the FFT.
I have no idea what the negative magenta signal near 0 is. Maybe some
kind of "ringing" artefact?
Post a reply to this message
Attachments:
Download '1d_fft.pov.txt' (10 KB)
Download '1d_fft.png' (77 KB)
Preview of image '1d_fft.png'
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in news:web.607df42de8731e131f9dae3025979125@news.povray.org Bald Eagle
wrote:
> I'll have to check and see if I ever posted the code.
This?
http://news.povray.org/povray.binaries.images/message/%
3Cweb.58bffecbe7e104a8c437ac910%40news.povray.org%3E/#%
3Cweb.58bffecbe7e104a8c437ac910%40news.povray.org%3E
Haven't looked at it yet.
ingo
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