I&#39;ve been working through my CUDA Pd project, and I ran into the problem of making externals that copy the canvas class.<br><br>My first idea was that I wanted a completely separate class with different methods using glist.  Calls from Pd looking for t_canvas work just fine, but functions like pd_findbyclass that look for canvas_class fail.  I started mucking around in the pd src, and I think it&#39;s just too difficult and would make onerous changes that I don&#39;t like.  <br>
<br>Is there something I&#39;m not getting about canvas classes and externals?<br><br>My second approach to creating an external library is to modify glist by adding an &quot;unsigned int gl_hascuda&quot; variable.  I&#39;d still prefer solutions that make use of entirely external libraries over modifying src, but this small change gets me half the way there.  Then, I just need to write the creator functions and the class works.<br>
<br>Chuck<br>