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| author | IOhannes m zmölnig <zmoelnig@users.sourceforge.net> | 2008-02-08 13:00:32 +0000 |
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| committer | IOhannes m zmölnig <zmoelnig@users.sourceforge.net> | 2008-02-08 13:00:32 +0000 |
| commit | 4d84d14ac1aa13958eaa2971b03f7f929a519105 (patch) | |
| tree | 6579d3f2cea5410a10c4baac8d0f372fb0dff372 /desiredata/doc/1.manual/x4.htm | |
| parent | b334d38aefbd8e0e159d7af6c20d63c5d2b64859 (diff) | |
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svn path=/trunk/; revision=9400
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diff --git a/desiredata/doc/1.manual/x4.htm b/desiredata/doc/1.manual/x4.htm new file mode 100644 index 00000000..faaf2f48 --- /dev/null +++ b/desiredata/doc/1.manual/x4.htm @@ -0,0 +1,61 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> + +<HTML> + <HEAD> + <TITLE>Pd Documentation 4</TITLE> + <meta http-equiv="Content-Type" content="text/html"> + <link rel="stylesheet" type="text/css" href="pdmanual.css" media="screen"> + </HEAD> + + +<BODY> + +<H2>Pd Documentation chapter 4: writing Pd objects in C</H2> + +<P> +<A href="index.htm#s4"> back to table of contents </A> +<BR><BR> +</P> + +<P>You can write your own objects that you and others can use in their Pd +applications. You can write them in C or (if you're smart and brave) in C++ or +FORTRAN. + +<P> HOW EXTERNS ARE LOADED + +<P> Whenever you type the name of an object +(into an "object" text box) that Pd doesn't yet know about, Pd looks for a +relocatable object file, named, for instance, "profile.pd_irix5". Pd looks +first in the directory containing the patch, then in directories in its +"path." Pd will then add whatever object is defined there to its "class list," +which is the set of all Pd classes you can use. If all this works, Pd then +attempts again to create the object you asked for, this time perhaps +successfully. There is no difference between an object defined this way and an +object built into Pd. + +<P> Once you load a new object into Pd, it's there for the duration of your Pd +session. If you load another Pd document which supplies a different version of +some Pd object, the object won't be updated. IF you're working on a new object +and decide to change it, you have to exit and re-enter Pd to get the change to +take. + +<P> In the "externs" subdirectory of the documentation you +can find simple examples of "externs" with their source code and test patches; +there are many other on the web (see <a href="x1.htm#s2">section 1.2 </A>). + +<P> Iohannes Zmoelnig has written an excellent guide to writing externs at +<A href="http://iem.kug.ac.at/pd/externals-HOWTO/"> + http://iem.kug.ac.at/pd/externals-HOWTO/</A> . + +<P> A paper by Theo Stojanov on the subject is at: +<A href="http://www.music.mcgill.ca/~theo/html/audio/pd_externs.pdf"> +http://www.music.mcgill.ca/~theo/html/audio/pd_externs.pdf </A> . + +<P> NT HINT: In NT, Pd is compiled using Visual C 6.0. If you have VC 5.x +your externs won't compile against Pd; you'll get an error about "disk full +or bad DLL." Simply recompile Pd under 5.x and the problem goes away. Externs +compiled under 5.x and 6.x are binary compatible; it's just the compilation +that's sensitive. + +</BODY> +</HTML> |