[PD] Need Help Understanding pack

[Theron Trowbridge]

I've looked over the help patches, the FLOSS manual, and at a number of
examples, but I'm clearly missing something.

I'm trying to build a proof-of-concept state table for a grid sequencer.  I
figured out to use an array to store my states, and I can write to and read
from the table, except when I'm trying to use pack.

The reason for pack is to get the column, row, and state of each button in a
range of the state table (will be a single column in my end use, but I'm
doing the whole thing for now).

Attached is a patch with a 2x2 grid set up and you can click on them and set
the state table.  That works.  It's the lookup part that doesn't.  I'm
stepping through the entire state table, deriving the column and row from
the index and looking up the value of that index.  This all works until I
send those three pieces of information to a pack object, it re-arranges
things in inconsistent manner.  Clearly there's either a timing thing or I'm
not understanding the data flow of what I'm doing.  Or maybe I'm just not
getting the point of pack.

I'm pretty new to this and every step is a struggle, so any suggestions are
welcome.  But if there are any tips or pointers on why pack is not working
the way I think it should - or what I should be using to accomplish what I'm
trying to do - I would appreciate it.



Long-winded description of how the attached patch is behaving:

Buttons are arranged in column, row order.  I'm just storing 0/1 values in
the state_table array.  If I click on the first and last buttons, my array
is then 1 0 0 1.  So state_table[i] gets me the off/on value for the button.
 i div 2 gets me the column number and i mod 2 gets me the row number.

If I just print these three outputs I get everything out in the order I
expect:

column: 0
row: 0
state: 1
column: 0
row: 1
state: 0
column: 1
row: 0
state: 0
column: 1
row: 1
state: 1

If I send the three values into a pack object and print the output of that,
I get:

pack: 0 1 0
pack: 0 0 1
pack: 1 1 0
pack: 1 0 0

I would expect this:

pack: 0 0 1
pack: 0 1 0
pack: 1 0 0
pack: 1 1 1

So things are coming in the wrong order overall, and the state values are
wrong.


Thanks,

-Theron
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