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k_guile PD external
--------------------------------------------
V0.0.2
-This external makes you able to use guile as an extension language for
PD. Guile is a scheme interpreter. The API is inspired by
the python pyext external made by Thomas Grill, and a small part of
the code is made by looking at the flext source.
-To be able to use it, you should first know the lisp programming language,
then check out the help-k_guile.pd example patch and read the small
example-scripts that the patch loads.
API
-------------------------------------------
k_guile provides the following functions:
* (pd-inlets num-inlets)
- Sets number of inlets for the object.
- add.scm, inout.scm
- Local function.
* (pd-outlets num-outlets)
- Sets number of outlets for the object.
- add.scm, inout.scm
- Local function.
* (pd-inlet inlet-num type func)
- "func" is a function that is called when the object
receives a message to the inlet "inlet-num" of type
"type". Normal values for "type" are 'float, 'list,
'bang, etc.
- add.scm, inout.scm
- Local function.
* (pd-outlet outlet-num arg0 arg1 ...)
- Sends value(s) to outlet "outlet-num".
The argument(s) can be of any kind.
- add.scm, inout.scm
- Local function.
* (pd-bind symbol func)
- Pd messages sent to "symbol" arrives at the "func" function.
- send_receive.scm
- Both local and global
* (pd-unbind symbol)
- Stop receiving messages sent to "symbol".
- Both local and global. For the local version, all bindings
are automatically unbinded when the object is destroyed or
reloaded.
* (pd-send symbol arg0 arg1 ...)
- Sends value(s) to receivers for "symbol". "Symbol" can either
be a scheme or a pd symbol.
- send_receive.scm
- Global function.
* (pd-get-symbol symbol)
- Returns the pd symbol for the scheme symbol "symbol".
pd-send works faster when a pd symbol is used instead of a scheme symbol.
- send_receive.scm
- Global function.
* (pd-set-destroy-func thunk)
- "thunk" is called before the object is destroyed or reloaded.
- Local function.
Scheme programming with the k_guile object.
--------------------------------------------------
-The code executed lives in its own local namespace
spesific for the pd object. If you need or want to
break out of the local namespace, simply just use
(load ) to let another script run in the global
namespace.
-If you need to call pd-inlets or pd-outlets, they
should/must be the first functions to call in the
script. The default number of inlets is 1,
and the default number of outlets is 0.
-Some global debugging options are set at the top
of the global.scm file. You might want to edit
those values _before compiling_ the k_guile external.
-None of the functions have been made with
thread-safety in mind.
-Backtracing doesn't work properly. Don't know why.
Changes
--------------------------------------------------
v0.0.1->v0.0.2:
-Loads /etc/.k_guile.scm and $HOME/.k_guile.scm at
startup.
-An inlet can spesify 'any as type, and will then
receive anything.
-The k_guile object can receive "eval" messages to evaluate
scheme code.
--------------------------------------------------
Kjetil S. Matheussen, k.s.matheussen@notam02.no
last updated 21.1.2004
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