[PD] data structures and z-order (feature request)

Christof Ressi info at christofressi.com
Tue Feb 25 21:51:36 CET 2020

Note that [append] will update its pointer to point to the new scalar. 
The new pointer is also output. So for consecutive appends you only need 
to send a pointer once in the beginning.


On 25.02.2020 21:44, Jean-Yves Gratius wrote:
> Oh, I didn't realize that I can go to the last position using [next( 
> message sent to [pointer] and then append a scalar to the end of the 
> scalar list..
> Everything is ok now for me. The last created scalar is the last one 
> to be drawn, even when refreshing display of the patch.
> On 25/02/2020 19:11, Jean-Yves Gratius wrote:
>> Hi
>> From previous old discussion ( 
>> https://lists.puredata.info/pipermail/pd-list/2006-04/037622.html )
>> I understood that datastructure z-orderdrawing depends of creation 
>> order, but when you programmatically create a new scalar (with 
>> [traverse ... , bang(  -> [pointer] ->  [append struct_name]), it's 
>> placed on the top of the list of scalars, although it's drawn at 
>> last. A refreshing of the window restablishes the correct drawing order.
>> Would it be possible to get a new pointer at the end of the list (and 
>> not at the top) ?
>> Thanks
>> JYG
>>> On Sat, 22 Apr 2006, Federico wrote:
>>> >/i'm seeing there is no z-order tracking in data-structures (i.e.: a 
>>> repaint />/event, or a mouse action, can bring an object to the top). />/is this true? /
>>> DS scalars are stored as linked-lists in the same way as objectboxes,
>>> so you might reorder them the way objectboxes may be reordered
>>> (Cut and then Paste once will bring the selection to the top).
>>> DS arrays are stored like float arrays, so I suppose you can reorder them
>>> like you might reorder elements in a float array (that is, painfully...)
>>> (maybe that there's a lib to help you do it with float arrays, but with DS
>>> arrays, I doubt it)
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