Here's how to get a matrix object in JS with the same data as the input matrix name.

function jit_matrix(name) { // create matrix with the same name as the input matrix var mat = new JitterObject("jit.matrix", name); var cell = mat.getcell(0, 0); post("res: "+cell+"n"); }

Okay, thank you, nice, but how do I process the matrix now? Does it need to be inside the function itself. After several attempt this not works:

//////////////////////////////////////////////////// var mydimmap = new JitterObject("jit.dimmap"); mydimmap.invert = [1, 1];

var mtrx2 = new JitterMatrix(4, "char", 320, 240 ); mtrx2.adapt = 1;

function jit_matrix(ext) { var mtrx = new JitterObject("jit.matrix", ext); mtrx2.frommatrix(mtrx); mtrx2.matrixcalc(mtrx, mydimmap); outlet(0, "jit_matrix", mydimmap.name); }

////////////////////////////////////////////////////

>>> Javascript TypeError: mtrx2.matrixcalc is not a function, line 15

I can't achieve to process the matrix inside another function anymore. This lacks in the JS tutorials.

Okay, after a good night I go this way:

///////////////////// process&output2.js

autowatch = 1;

var mtrx = new JitterMatrix(4, "char", 320, 240); var opfloat;

function recupop(v) { opfloat = v; }

function bang() { mtrx.op("*", opfloat); }

function jit_matrix(ext) { { mtrx.name = ext; }

{ bang(); } outlet(0, "jit_matrix", mtrx.name); } //////////////////////////

I am aware that this code is elementary for programmers, but I'm not, I'm only an artist and I think Max is really interesting for its accessibility and documentation. Such basic code should be in the doc because it would allow to gain some days ... yes. I think we need needs more JS basic tutorials ...

Anyway thanks for the example, Wes, on how to retrieve the matrix in JS. (more, more, more ;-)