[PD] question about getdir(Guenter Geiger)'s code

[Thomas O Fredericks]

Oh yeah, attached is the source code and compiled versions for linux and
window. I do not have cvs access. Could someone please include it in the cvs
and adapt the makefile accordingly? Also could someone compile it for OS X
intel and PPC and send me the binary?

Tom

On 8/29/07, Thomas O Fredericks <tof at danslchamp.org> wrote:
>
> getdollarzero can get the dollar zero of any parent.
> For example, lets say a patch called "top" contains the abstraction 1.
> The abstraction 1 contains the abstraction 2.
> The abstraction 2 contains the abstraction 3.
> Well, with getdollarzero, abstraction 1 through 3 can know the dollar zero
> of the patch "top".
> The patch "top" becomes the "root" patch.
> All the abstractions 1 through 3 have in common this "root" patch.
>
> This is what I needed it for:
> 1) I am currently developing a state saving system that does not require
> the "$0" arguments (of Memento for example). The state of all elements that
> have the same "root" patch are saved together.
> 2) I am also creating a timing architecture for PD and I wanted all
> elements in the same "root" to be synchronized together.
>
> Tom
>
>
>
> On 8/29/07, Hans-Christoph Steiner <hans at eds.org> wrote:
> >
> >
> > Hey,
> >
> > I think Günter didn't want to depend on non-public headers like
> > g_canvas.h, so included the glist struct from that header.  Personally, I
> > think makes more sense to include the g_canvas.h header.
> >
> > [parentdollarzero] like a useful object, I am not usre what
> > [getdollarzero] does beyond [float $0] or [$0].  Anyway, hopefully they make
> > into Pd-extended.
> >
> > .hc
> >
> >
> > On Aug 27, 2007, at 4:43 PM, Thomas O Fredericks wrote:
> >
> > Thanks to Han's help page ( http://puredata.info/docs/developer/mingw) I
> > was able to compile a test external on windows with mingw.
> >
> > I then started making a new external called getdollarzero based on
> > getdir (from ggee) and parentdollarzero (from iemlib2). I compiled it and it
> > works but I had to:
> > 1) remove Guenter's hack from getdir's source code
> > 2) and therefore include g_canvas.h
> >
> > My question is the following: why is there a hack in the first place? If
> > I do not use it will my code crash PD in some way (I compiled against PD
> > 0.4 and worked fine during testing)?
> >
> > As a reference, here is my code with the hack commented out :
> >
> >
> > --------- getdollarzero  --------
> >
> > #include "m_pd.h"
> > #include "g_canvas.h" //needed to include g_canvas.h once the hack was
> > commented out
> >
> >
> > /* HACK
> > struct _glist
> > {
> >     t_object gl_obj;            // header in case we're a glist
> >     t_gobj *gl_list;            // the actual data
> >     struct _gstub *gl_stub;     // safe pointer handler
> >     int gl_valid;               // incremented when pointers might be
> > stale
> >     struct _glist *gl_owner;    // parent glist, supercanvas, or 0 if
> > none
> > };
> >
> > END HACK
> > */
> >
> > typedef struct getdollarzero
> > {
> >     t_object x_ob;
> >     t_canvas * x_canvas;
> >     t_outlet* x_outlet;
> >     int x_level;
> > } t_getdollarzero;
> >
> >
> >
> >
> > static void getdollarzero_bang(t_getdollarzero *x)
> > {
> >     int i = x->x_level;
> >     t_canvas* last = x->x_canvas;
> >
> >     while (i>0) {
> >         i--;
> >         if (last->gl_owner) last = last->gl_owner;
> >     }
> >     // code example taken from iemlib2's parentdollarzero:
> >     // x->s_parent_unique = canvas_realizedollar((t_canvas
> > *)this_canvas->gl_owner, gensym("$0"));
> >     // original get dir function:
> >     //outlet_symbol(x->x_outlet,canvas_getdir(last));
> >
> >     outlet_symbol(x->x_outlet,canvas_realizedollar(last, gensym("$0")));
> >
> > }
> >
> > t_class *getdollarzero_class;
> >
> > static void *getdollarzero_new(t_floatarg level)
> > {
> >     t_getdollarzero *x = (t_getdollarzero *)pd_new(getdollarzero_class);
> >
> >     x->x_canvas =  canvas_getcurrent();
> >     x->x_outlet =  outlet_new(&x->x_ob, &s_);
> >     x->x_level  =  level;
> >     return (void *)x;
> > }
> >
> > void getdollarzero_setup(void)
> > {
> >     getdollarzero_class = class_new(gensym("getdollarzero"),
> > (t_newmethod)getdollarzero_new, 0,
> >         sizeof(t_getdollarzero), 0, A_DEFFLOAT,0);
> >     class_addbang(getdollarzero_class, getdollarzero_bang);
> > }
> >
> > --------- getdollarzero  end --------
> >
> > --
> > thomas ouellet fredericks, tof at danslchamp.org, montreal, canada
> > _______________________________________________
> > PD-list at iem.at mailing list
> > UNSUBSCRIBE and account-management ->
> > http://lists.puredata.info/listinfo/pd-list
> >
> >
> >
> >
> >
> > ----------------------------------------------------------------------------
> >
> > Computer science is no more related to the computer than astronomy is
> > related to the telescope.      -Edsger Dykstra
> >
> >
> >
>
>
> --
> thomas ouellet fredericks, tof at danslchamp.org, montreal, canada
>



-- 
thomas ouellet fredericks, tof at danslchamp.org, montreal, canada
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