[PD-dev] canvas class polymorphism

[Hans-Christoph Steiner]

What's the end goal here? You want an object that acts like a t_canvas/ 
t_glist?

.hc

On Mar 13, 2011, at 3:31 PM, Charles Henry wrote:

> I've been working through my CUDA Pd project, and I ran into the  
> problem of making externals that copy the canvas class.
>
> 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's just too difficult and would make onerous changes that I  
> don't like.
>
> Is there something I'm not getting about canvas classes and externals?
>
> My second approach to creating an external library is to modify  
> glist by adding an "unsigned int gl_hascuda" variable.  I'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.
>
> Chuck
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