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Change Matrix dimension and plane count inside [jit.gen]

Nov 01 2015 | 6:37 am

Hi genners,

I just started to get my head around [jit.gen] . Do input and output matrices always have the same dimensions and plane count, or ist it possible to to change/re-arrange a matrix.

In my case I am working on small matrices performing trigonometric calculations.
Can I transform an input matrix with one plane and the dimensions 6 x1
to a matrix with two planes and the dimensions 2×1?

The first three cells of the input matrix shall be mapped to the first cell of the output matrix (onto three planes) – and the same for the last three cells of the input matrix to the second cell of the output:

| a | b | c | d | e | f | -> plane 0

| a | d | -> plane 0
| b | e | -> plane 1
| c | f | -> plane 2

Thanks, Jan

Nov 01 2015 | 10:52 am

Jan, the left input sets the dim, planecount and data type for all inlets and outlets.

Nov 01 2015 | 11:54 am

Thanks Metamax,

I was aware of this – but whatever i set as dimension or planecount attribute (even with adapt set to 0) the output format seems to be always the same as the input format. Is there a way to have different input and output dimensions and planecounts? I am not really a natural in matrices – maybe that’s something completely of the idea of matrix calculation ….

Nov 01 2015 | 11:58 am

jit.repos should do what you’re after. I don’t think it’s possible in jit.gen.

Nov 01 2015 | 11:59 am

Jan, my understanding is that jit.gen can have n inlets/outlets but they all have to be the same size as the left inlet. Hence, the thinking is a bit backwards. In terms of size, you need to give it what you want.. rather than giving it something else to make what you want. If that makes sense.

Nov 01 2015 | 12:06 pm

it does. And actually right now I realize that this it what is described in the help file : "…generates new Jitter Matrix Operator objects". It is for matrix operators not to transform matrices. So for transforming a matrix i’ll have to stick to plain jitter objects.


Jan 03 2016 | 3:59 am

Yo Jan. Bit late to the party.

You can work with different dimension matricies – BUT, the output will always maintain the same attributes of the matrix entering in [jit.gen]’s first inlet.

The great bit about this is that you don’t even need to use that matrix in any calculations; you can just bang a blank matrix that matches the format you want your output to be and trigger your calculations.

-- Pasted Max Patch, click to expand. --

Modulo [%] in combination with [/] into [int] will be your bread and butter when you’re translating between matrix dimensions.

Nov 05 2016 | 8:57 am

Here is an elegant way of doing what you want :)

But there is still useless calcuations, I was expecting to find something more powerful

-- Pasted Max Patch, click to expand. --

Nov 06 2016 | 4:55 am

@NICOLASNUZILLARD Nice!!!! Thank you

Nov 06 2016 | 6:13 am

This technique is usefull when you want an audio signal to set the XYZ position of an array of 3d points. I had the idea by watching the patch 22.CatchNurbs in the JitterRecipes. In the exemple patch I’m mentionning I didn’t like the use of messages send to a matrix object so I did it a way so you don’t have to send any messages.

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Forums > Gen