Patrick Keenan

In the cartopol help patch when you click on the LCD at what would be North on a compass, the angle you get output is 90 degrees and what would be East on a compass is 0 degrees, South is -90 degrees and West is - 180. I'm sure it is just a bit of simple maths but unfortunately my maths skills are lacking! I want it to output 0 degrees when i click North, 90 degrees when i click East, 180/-180 when i click South and -90 when i click West, any ideas?

It is so that i can control Vbap~ in order to move sounds around a multichannel setup.

In the cartopol help patch when you click on the LCD at what would be North on a compass, the angle you get output is 90 degrees and what would be East on a compass is 0 degrees, South is -90 degrees and West is - 180.  I'm sure it is just a bit of simple maths but unfortunately my maths skills are lacking!  I want it to output 0 degrees when i click North, 90 degrees when i click East, 180/-180 when i click South and -90 when i click West, any ideas?

cartopol-basic-question

[scale 0. 1. -180. 180.] ; scale back to -180..180

this maybe seems a bit complicated, but this way you can follow every single

step. Of course you could merge this into a single [expr] object.

[cartopol]
[/ 3.141593]
[scale -1. 1. 0. 1.]   ; scale to 0..1
[!- 1.]                ; invert
[+ 0.25]               ; add offset
[% 1.0]                ; wrap around
[scale 0. 1. -180. 180.] ; scale back to -180..180

this maybe seems a bit complicated, but this way you can follow every single
step. Of course you could merge this into a single [expr] object.


Thats ingenious, i wish i had maths chops!

I actually got the patch to work by setting the azimuths of the speakers in vbap~ to the 'wrong' angles, so that the list of angles for speakers 1, 2, 3, 4 etc were rotated. I appreciate your method though as that is exactly what i wanted.

I actually got the patch to work by setting the azimuths of the speakers in vbap~ to the 'wrong' angles, so that the list of angles for speakers 1, 2, 3, 4 etc were rotated.  I appreciate your method though as that is exactly what i wanted.

Cartopol basic question