[PD-dev] list math

[Hans-Christoph Steiner]

On Feb 11, 2006, at 1:40 PM, cyrille henry wrote:

>
>
> Hans-Christoph Steiner a écrit :
>> There are now a couple versions of math objects that do standard math  
>>  operations on lists: Frank's list-abs and Cyrille's ds_/datastream.   
>> I  think that there should be a standard set of math objects that can  
>>  handle lists of indeterminate length (like the previously mentioned   
>> objects).
>
> i don't fear redondancy. some mapping objects can be the same as some
> list-abs object.
> having a mapping_clip that whould clip data acording to the mapping
> standard is great, event if it's the same object as the list_clip 0 1.
> i don't think it's a problem to have 2 objects with same fonctionality
> with diferents name.
>
> i think the mapping lib should have all necessary object for mapping.
> the list-abs should have all necessary objects to deal with list.
> and it's not a problem if sometimes the same objects have 2 diferents
> name in both lib.

How about implementing all of the objects in math/list, then the  
mapping versions would be based on them.  Sharing code is always  
helpful.  So [mapping/clip] would just be:

[inlet]   [inlet]                 [inlet]
|         |                       |
|         [float_argument $1 0]   [float_argument $2 1]
|         /                      /
|        /     /----------------/
[math/list/clip]
|
[outlet]

That would make it behave exactly like [math/list/clip] but have  
defaults of 0 and 1.  People looking for [math/list/clip] functionality  
would use [mapping/clip] interchangeably.  But some people might get  
confused the other way around, if they use [math/list/clip], it would  
clip to 0,0.  But that's not such a big deal.

.hc

>> So it seems that the list handling versions cannot be interchangable   
>> with the standard versions, since standard math objects will  
>> interpret  lists as input to that objects inlets.  But it would be  
>> nice to have  both options.  So I propose making a mirror math  
>> library for lists,  like this:
>> math/clip
>> math/list/clip
>> math/*
>> math/list/*
>> math/min
>> math/list/min
>> etc. etc.
>> This would then largely be built from Frank's list-abs and Cyrille's   
>> ds_ objects and assembled to make sure that the list versions have  
>> the  same interface as the standard versions.  Then for handling  
>> floats,  they would be completely interchangable.
>> .hc
>> ______________________________________________________________________ 
>> __ ____
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>>                                            - Dr. Martin Luther King,  
>> Jr.
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