[x3d-public] v4 Sound > Analyser node > x3dom > who's drawing?

[GPU Group]

That helps a lot / solves the mystery, thanks very much Andreas.
-Doug
For regular x3d - I started an experiment adding 4 outputOnly fields to
Analyser node:
byteFrequencyData outputOnly MFUByte (just kidding, no such thing as
MFUByte in web3d. Or should there be?)
floatFrequencyData outputOnly MFFloat
byteTimeDomainData outputOnly MFUByte
floatTimeDomainData outputOnly MFFloat
I'll refresh all 4 every frame internally from the webkit Analyzer node
getByteFrequencyData(array) etc.
Then somehow route or otherwise use those output fields in some geometry
rendering to represent.
I'll see how it works.

On Wed, Feb 1, 2023 at 8:16 PM Andreas Plesch <andreasplesch at gmail.com>
wrote:

> The pointset animation is quite deeply embedded in the actual spatial
> sound implementation in soundController_SpatialSoundFilter.js as an
> internal feature . Search for pointSet. (SpatialSound.js is just the x3dom
> node interface).
>
> This brings up how one would achieve this kind of amplitude animation in
> regular x3d (with the SpatialSound nodes) ?
>
> Hope this helps a little bit, Andreas
>
>
>> Date: Wed, 1 Feb 2023 12:01:28 -0700
>> From: GPU Group <gpugroup at gmail.com>
>> To: X3D Graphics public mailing list <x3d-public at web3d.org>
>> Subject: [x3d-public] v4 Sound > Analyser node > x3dom > who's
>>         drawing?
>> Message-ID:
>>         <CAM2ogRfokXG=h=YmHRCDq1pa+OvGrGpC=
>> 3PZtGbESrDpUvjsSg at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> https://medialab.hmu.gr/minipages/x3domAudio/SpatialSoundFilter.xhtml
>> Q. where  / what function / who is drawing the Analyser node frequency or
>> time domain visualization. I don't see anything in Page Source looking at
>> Analyser node fields for output.
>>
>> Thanks, Doug
>> more..
>>
>> https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API/Visualizations_with_Web_Audio_API
>>
>> - web audio example of visualization using Analyser node gets a buffer of
>> spatial or time-domain data on each draw loop, and draws it.
>> Currently web3d Analyser node has no output fields defined for the spatial
>> or time-domain output data.
>>
>>
>> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/sound.html#Analyser
>>  It is a mystery to me how we would use it to visualize without access to
>> the data.
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>
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> Andreas Plesch
> Waltham, MA 02453
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