[PD] note data record / playback

[Mathieu Bouchard]

On Tue, 12 Sep 2006, Kyle Klipowicz wrote:

> Ah, so is the [pointer] object the same thing as a C pointer (*ptr) 
> traversing a linked list?

It's the closest that you can get in pd, but it's not directly a C 
pointer:

1. [pointer] holds one A_POINTER atom like [f] does for A_FLOAT and
    [symbol] for A_SYMBOL.

2. an A_POINTER points to a t_gpointer, which is an intermediate thing
    that makes it safe to use pointers to things that may disappear
    from memory. (outside pd it's called "weak pointer" or "weakref")

3. a t_gpointer can only point to a t_scalar or to the element of a
    t_array. at the same time it also gives access to the canvas containing
    the scalar or the array containing the element.

However, GEM and GridFlow pretends that it's a direct pointer because 
Miller gave us no other choice.

>  I knew the had the same name, but since so many things are named 
> strangely in Pd (right Matju?) I couldn't be sure.

when using Pd it's important to distinguish between pointers, pointers and 
pointers, as well as between objects, objects, objects and objects, and 
also canvases vs canvases, but I shall not forget the opposition between 
lists and lists, and the one between pd, pd, pd and pd. (anyone up for 
some disambiguation?)

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| Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju
| Freelance Digital Arts Engineer, Montréal QC Canada