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Spat5.viewer listener / speaker | microphone | phone orientation discrepancy

Spat
#1

listener orientation is always absolute (doesn’t depend of listener position) ;
But speaker / microphone / phone orientation is always relative to sweet spot / center.

/orientation/mode “fixed yaw” : doesn’t help, it just disable auto orientation of speaker when updating position. it doesn’t allow to set absolute orientation.

I need to display absolute speaker | microphone | phone orientation, as it works with listener orientation.

Am I missing smomething ?
is that expected behavior ?

example patch :


----------begin_max5_patcher----------
1582.3oc6Z0rbqZCEdsySACSW0wwAIAXSW0tnuCsM2LYvfrsRvHOfvIo249t
W8CfEFYLIFS8h6h3DNR3Ceme9NGcHe+tI1Kouiyss9MqGslL462MYhTjPvjx
qmXuM78njvb41r2hyyCWismpVigemIkmyn6pDRhkhnKe4dTPkvzhsjzDLS90
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kgxS4CclM0B46X4533XBpvqturDlJe4buqhujjhsblYBeNFwGxH9fmDeS6u6
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SKFKam2HY6bWLVJpG5I3Zvi0GEejUXfxo6ilgKtFLnn9jQfFB1DTu3pgCglf
iFl5ECo2PoIvnX8Fozb3Xwm.+R5QcLfvc61iyplxgTE7yB9hZfHKlJujjptz
WdYFVb9Ws4lZGlwOQCie1jhL0YhdubXb1hYMjkVPJSikCOwVdNSw4m3mWTgC
4wQu6G28eTHNUrC
-----------end_max5_patcher-----------

thanks for your help :slight_smile:
Mathieu

#2

Hello Mathieu,

Well, you can do that with the “/foo/direction/xyz [float][float][float]” which sets the direction axis (aka normal), expressed in world coordinates, for the object “foo”.
For any entity (listener, speaker, source, etc.), this uses absolute coordinates.
See spat5.viewer help patch, tab “orientation”.

Hope this helps,
T.

#3

Thanks Thibaut

ho ok, so direction is absolute.

my objects orientation is expressed in quat… too bad a conversion is needed just to display orientation in viewer :frowning:
Any clue on how to convert a quat to direction ? :-s

Isn’t it a bit weird that orientation is absolute for listener, and relative for speakers, mics, … ?

#4

I’m still struggling with this… can’t find a way to convert a quat to direction (normal).
:face_with_spiral_eyes:
any help would be appreciated :slight_smile:

#5

reply to myself :
thanks to chatGPT here is a solution to convert quat to direction using a js / v8 (+ the same maths using max expr)
I don’t really understand why a spat5.quat.inverse is required here… but it works :slight_smile:


----------begin_max5_patcher----------
2073.3oc6aksaaiCE84juBBg7PhGGaQpM6onXl99LyOPSQ.sMsiZkEc0h2Jx
+9vMIamHIyTQ41Bzh.qERoCO2Md4kpe65qrlP2RRs.+I3ifqt5aWe0Uhawuw
UpquxZId6zHbpnaVQgqICxnKVDQr5KaeMNIFujTWyqvYSeJLdwiIjoYRnfnA
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L1ehWicEMm9DMISWbJTWHYSOe80GNH984q6qooWLYCSIVnAyHaEVSVKvYmwV
iYd4h74GbD1ZHTar0N1dxtR6Iz2A4lRWtjDm8J1MbGdC38fDRDNiIoAYTPTX
ZFIljz.ocBFKoqiz2xVPa6Zos8q4FbT09JeGbaIIMEuf7ZtkRySlRFBEj7FX
SDBJ0eiGwOLdrQUiPeioFEdCy3dy0Ebj23Gc+jFb0Un0bcE+NpVthpkqrXNy
in3L8hSNmNMOcBMYFIYJMhlHeK1CbfNAHV35pOytRApighyV0X5z.tjsqRXl
Wg7fqLzsJByzW+H0mD+01nweEJa3mZJ.riOWMWU6gBJcesc3sDkl4f0Tz4pd
A4LNmlsSQ21G9ttHb+USAuGIhdCcDN7APgau6aJLFp30OIexKr3acfsEoaBY
i4FH.RDuxAIckgxKLclNUP6pin4Xvf21C.vAr..MQdnX5GjefPIJijYrn1tF
KnccTroIjPiErwSl8pZBViMgDzXbqljl3gMAnd2dybTual6.9CvMycYmAuqA
N6AEVyvwprJLaxTAUmvgq4H8J7zuvrXk+0TTmwJ0omLIJnY4Yfw7MaR4BuWn
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1fv30jjzlVKjbZTVtahCnfyv0FyrrZ9FXrEMHWWIdR8UY3PaMDeVNmquP6F7
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me+SUeRIbwWNsLZwg7.slQRYh1x8p8ik9T79ToAxaAG3YvgGht0.EnCi3ekH
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2NjzI7lI7H8zQK4NxDHoAPNF.G2QZNoDzz94ZgrWmLqjqN94HaCLqjqN5QWS
3CvK4tdH0ZN4nKRsMiIWsxdv.BOmKTHQDTWCuVij8EhRvwWJf70GHUeVFNaE
MLNSsVGGjm3+oqdtC7F6D3IVT8w2nsiPcbAgcRlK5AMrKRUTOns6hTEgZ425
aBiOcbb8MgiKTGG2Wmggbg83Uq3e04pNKvvZI9yxMGZbewkgwxKEU0wJgvKY
hr+Ah6fSl9TXFYJudJhZTr0WV5WK9VpjDmGpTbhMRxRTcGdsnRWgkDQTDnqe
95+G165sk
-----------end_max5_patcher-----------

I still think that an easier solution to set fixed (absolute) source orientation would be appreciated.
When setting orientation/mode to “fixed yaw” : /yaw is relative to listener (and depends of source position)… so it doesn’t sound very “fixed” to me :-s
my 0.2 € : not very intuitive, and not well documented enough !

quat / Euler (yaw pitch roll) / axis … are different ways to describe the same thing : orientation.

The behavior of the source is another story : will it follow listener position & orientation (relative orientation) or should it be in absolute (world) coordinates : IMHO this should be what /orientation/mode describes.

I find it a bit weird that source behavior depends of which convention is used to describe source orientation…

But maybe it’s too late to change how /orientation/mode works in spat (backward compatibility ?)

#6

Hello Mathieu,

Thanks for all the feedback and findings.
Apologies, I didnt get a chance to look at it in details yet. Will try to do so next week. (= your posts are not lost in the void)

Best,
T.

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