compusition

This example, like all my Max/MSP + Ruby examples, requires ajm objects.

One of the nice things about the ajm.ruby object is it can access any of Cycling '74's Java APIs. I hadn't specifically designed any Jitter support, but I got it for free. Here's an example of how to read in a Jitter matrix and modify it using Ruby.

First, save the following Ruby script as jitter-test.rb somewhere on your Max search path (then you may need to restart Max):

Then, run this Max patch (works in Max 4 and 5):

#P user jit.pwindow 35 304 162 122 0 1 0 0 1 0;
#P window setfont "Sans Serif" 9.;
#P window linecount 1;
#P message 61 276 146 196617 jit_matrix u374000028;
#P newex 61 254 62 196617 prepend set;
#P message 45 210 186 196617 jit_matrix('u374000028');
#P newex 45 188 62 196617 prepend set;
#P message 49 134 146 196617 jit_matrix u374000028;
#P newex 49 112 62 196617 prepend set;
#P newex 36 160 86 196617 sprintf %s('%s');
#P message 55 35 357 196617 setcell 0 0 val 0 \, setcell 0 1 val 50 \,
setcell 1 0 val 100 \, setcell 1 1 val 150;
#P button 36 35 15 0;
#P user jit.pwindow 244 99 162 122 0 1 0 0 1 0;
#P newex 36 69 105 196617 jit.matrix 1 char 2 2;
#P newex 36 232 337 196617 mxj ajm.ruby @scriptfile jitter-test.rb;
#P connect 4 0 1 0;
#P connect 3 0 1 0;
#P connect 1 0 5 0;
#P connect 5 0 0 0;
#P connect 0 0 12 0;
#P connect 5 0 8 0;
#P connect 8 0 9 0;
#P connect 1 0 6 0;
#P connect 6 0 7 0;
#P connect 0 0 10 0;
#P connect 10 0 11 0;
#P fasten 1 0 2 0 41 90 250 90;
#P window clipboard copycount 13;

If all goes well, you should see this patch. Click the "setcell" message box to fill the matrix. Then hit the button to have Ruby process it. The sprintf is needed to convert a Max message into a Ruby method call. This kind of syntax conversion is often needed when moving data from Max to Ruby.

Easy, right?

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Ruby Jitter Example

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