[PD] Selecting, and changing figures from the keyboard

Claude Heiland-Allen claudiusmaximus at goto10.org
Sun Apr 11 19:03:43 CEST 2010

Hey Andrew,

Haven't had time to look at your patch yet, so take this with salt:

Andrew Faraday wrote:
> Hey all
> One of my workshop members recently challenged me about how to produce a keyboard-based control system to select and change parameters (in this example RGB) using the left and right arrows to select and the up and down to change. I've attached my attempt at it, however the logic involved is a bit cumbersome. Any more elegant solutions?


(some glitches where recordmydesktop couldn't keep up, also not really 
watchable at anything other than the highest resolution MPEG (745MB))

everything keyboard controlled, using pdlua to process key events 
captured from gridflow (as i don't get on with pd's key/keyname), the 
logic is more easily expressed in a text language with proper data 
structures in my experience - pd patching for complicated state 
manipulations is a pain...


The patchery to implement that would be a total nightmare, so I didn't 
even try..

Full code here - probably won't work on any computer than mine as it was 
set up 2 years ago, which makes 0 computers in 2010 ;)

svn co https://code.goto10.org/svn/maximus/2008/lac

also this version shows a visualisation of the key presses

Anyway, what I realized when using this control system is: navigating 
with cursor keys is an utter pain when you want to change things in 
different places quickly, as you probably will want to do when playing 
live!  Also, muscle memory means that it's better to have 1 key per 
section to jump to directly, instead of having to double-check which is 
currently selected.

Just some quick thoughts,


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