[PD] How to map moving points in 3D space (x, y, z) to quad panning?

IOhannes zmölnig zmoelnig at iem.at
Fri May 24 19:50:04 CEST 2013

On 05/24/2013 04:43 PM, Julian Brooks wrote:
> Hi all,
> So yeah - that (the subject).
> I would like to map some 3D moving sources (from Pmpd) in quad.
> I had been hoping to make use of Lorenzo's [panner_1x4~], from here
> https://gitorious.org/pd-panner-4ch
> but I just can't wrap my head around the maths involved.
> Anyone have any experience with this, or alternate strategies - the leanest
> possible please as it's on the RPi.
> Speakers are in a square/diamond and very close together - 25cm or so.
> It doesn't have to be very accurate and I would just like to have the
> impression that the five pmpd generated sound sources are moving around but
> my attempts so far sound cack.
> Also presuming that as we're not doing ambisonic type malarkey that the
> y-axis is pretty much redundant but, well, dunno?
> Had a dig around here and hurleur but nothing obvious jumped out at me.
> Tips, tricks, pointers or tutorials most gladly accepted

i'm not sure what your problem is, but probaby zexy's [cart2sph] will 
help mapping the cartesian XYZ coordinates to spherical 
distance/direction coordinates. for panning you will usually use the 
direction coordinate(s) only.


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