Using JavaScript to communicate with Pure Data

[luismrguimaraes]

Is there a way to do this? In my case, I want to use Pure Data as the audio engine of a Three JS game, but was unable to figure out how to communicate with the patch from JavaScript.

[charlesneimog]

Hi @luismrguimaraes,

Yes, it is possible I am yet doing the docs, but you can understand part of it reading this:

https://charlesneimog.github.io/pd4web/js/

In this case, to send a float from js to PureData you need to use Pd4Web.sendFloat("myreceiver", 5), from Pd, you will receive this number from the object [r myreceiver].

---

To send, for example, a float from Pd to Js you need the function:

Pd4Web.onFloatReceived("myfloat", function (f) { 
    console.log("Received " + f)
});

This function will be executed always you send something to object [s myfloat] (on Pd side).

[luismrguimaraes]

I managed to get Pd working by moving all the relevant files in WebPatch/ to the root

But I'll try this tomorrow so that I can have a cleaner root. Thanks for the updates!

[luismrguimaraes]

Hello again, I've just tried this, but I don't understand what I should change in pd4web.js. The paths for pd4web.data are all already absolute paths like: var PACKAGE_NAME = '/Users/<username>/Documents/Code/<project-folder>/src/Audio/WebPatch/pd4web.data;.

The errors I'm getting are a pop-up with "WebAudio worklet thread initialization failed!" and this:

These are the same as before the update.

[charlesneimog]

you must change the REMOTE_PACKAGE_BASE. In your case it will be something like:

var REMOTE_PACKAGE_BASE = 'src/Audio/pd4web.data';

Obs.: I had not tested it myself!

[luismrguimaraes]

I'm getting the same error after changing that variable in pd4web.js.

Fortunately, by moving the WebPatch/ contents to the root of my project, I have Pd working and can send messages to the patch, and I'd say this discussion is resolved ("Using JavaScript to communicate with Pure Data
"). It would definitely be useful in the future to have Pd working without having to move the WebPatch/ contents, so I can create an issue if you want.

[charlesneimog]

Yes, changing the folder seems a bit more complicated because you need to change it from the build process. I'll try to research this, but it's not the priority right now.