2016-02-22 11:12 GMT-03:00 Matt Barber <brbrofsvl@gmail.com>:

Over the years, the most common complaint I've heard about Pd's limitations is that it's not identical to Max/MSP.

On Mon, Feb 22, 2016 at 4:19 AM, Eugene Lazarchik <evgenius.lazarchik@gmail.com> wrote:

Where do I start?

* Dynamic patching is officially not supported and bug/feature requests get ignored. I had to jump through a lot of hoops to use dynamic patching with GOP but I discovered a bunch of weird issues with subpatches not getting redrawn and connectors left hanging after object deletion. Had to build ugly hacks/workarounds since nobody's gonna fix the issues in PD. Sending loadbangs to dynamically created objects is a pain, as well as trying to dynamically connect them to something (most examples of using the "connect" message use hardcoded object ID's).

* Support for lists is quite limited. Wanna create a multidimentional array? Build your own. Want a hash map? Build your own. Luckily there's list-abs but it's weird that such basic functionality (that's present in most programming languages) is not a core language feature.

* Sends and receives are global which creates a potential for conflicts. $0 can be used to avoid that but it looks ugly and many libraries, patches, and I think even help files, don't use it.

* Help files are *.pd which sounds neat at first, until you realize that they're not easily searchable and can't be viewed online.

* Bugs and weird behavior when handling special characters. There's no consistent way of escaping them. Sometimes characters disappear when saving and loading a patch.

* Limited support for comments. Special characters are not allowed (really? these are comments!). Automatic line wrapping doesn't work well since after saving/loading a patch often changes how text is broken into lines. So I have to put each line as a separate comment.

* Dependence on font sizes. By default object boxes scale automatically depending on the text inside. When you add more text, all inlets/outlets move. I installed a different version of PD and font size is slightly different and all objects are of a different size now.* Want to add an outlet to the beginning of a trigger object? Enjoy disconnecting and connecting all other outlets since there's no way of automatically move them.

* Want to print all messages flowing through a connection for debugging purposes? Remove the connection, then create a [t a a] object, then create a [print] object, then connect [print] to the second outlet, then connect [t a a] to the previous and next object (If you don't use the [trigger], messages will only be printed after they flow through the whole system). After you're done, delete the objects and re-create the connection. Not very convenient for quick debugging.

* Vanilla provides only minimal functionality while most of the convenient objects are supposed to come from external libraries. There's multiple issues with that. First one is that libraries are less standardized and consistent. They have different approaches, sometimes duplicate each other, use different conventions for naming, inlets/outlets, etc. Second issue is that libraries often become dead/unmaintained.

* Big patches/abstractions become unreadable really fast. Connectors are always straight lines and there's no support for dummy intermediate "points" for connecting stuff. I use [t a] and [+~] for these purposes but it'd be nice to have native support for this.

* Standard GUI objects are ugly and have limited functionality.

* There's no good support for the concept of functions/procedures. Let's say we need to take some input, do some transformations and produce output, and we need to do that in multiple places in our patch. We can copy the objects but that will make the patch use more memory and there will be no code reuse. Another way is to make that an abstraction, but it's silly to make abstractions for every little thing that we need in 2 places. Also, instantiating 2 abstractions still uses more memory. We can try reusing the same code but we'll have to make multiple output connections so we'll need proper routing in order to figure out where to send the result. I made an abstraction to simplify that but this should be a standard feature of PD.

* *.pd format is not very friendly to Git. Try viewing diffs and resolving merge conflicts. Moving a subpatch on the screen causes different coordinates to be saved in the file, often resulting in conflicts. Cutting and pasting renumbers all objects and connections. This makes using branches and working on the same files impractical.

* PD seems to be maintained by only a handful of people and new features/bug fixes are rarely released. I used to code in C and was thinking of contributing but I found no good guide for new contributors. I wasn't even able to compile PD on my Mac (there's multiple build scripts in the sources but none of them work). I'm also not sure what the testing process should be (to make sure I'm not breaking any existing functionality or support for operating systems or devices).

* PD community uses mailing lists for communications, haha. In order to find useful information I have to view one message per page, with tons of distracting quotes from previous messages.

These are just the first things that came to my mind...

On Sun, Feb 21, 2016 at 6:30 PM, Niklas Reppel <nik@parkellipsen.de> wrote:

Hmm, i always thought that the dynamic creation and destruction of sound sources (oscillators etc.) pretty inconvenient in PD,
compared to a source-code based approach.

Maybe i missed some developments here, but the last time i checked (a year ago maybe), this was clearly quite
a hassle, even though i know it's possible.

On Mon, Feb 22, 2016 at 03:49:43AM +0200, Matti Viljamaa wrote:
> Perhaps a bit of broad question, but I find it interesting in order to speculate about future additions.
>
> How do you think Pure Data is limited?
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