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leafcutter

I'm making v8UI which allows painting in the UI - I'd like to grab pixel colour data from the window like you can do with getpixel in LCD or getcell in jit.matrix. Is there a built in way to do this in MGraphics? 

I'm making v8UI which allows painting in the UI - I'd like to grab pixel colour data from the window like you can do with getpixel in LCD...

is-there-a-mgraphics-getpixel-equivalent

Is there a MGraphics getpixel equivalent? 

Jon Williams

Please help me wrap my head around what "global" actually means in the javascripting context.

Coming from a development background working in programming languages like C, C++, C#, Java, Python, and Groovy; I'm very confused by the phrase "global variable" as used throughout the Max javascript documentation such as, "

Variables defined in the global scope will persist...

In other language implementations a "variable in the global scope" is accessible from any nested scope, and there is only one instance of a global variable per "global scope".  But that does not seem to be the case with Max-js?

In the compressed example patcher, the variables "global00" and "global11" are defined in the "global scope", but "global00" behaves more like a "script instance" (or "class") scoped variable than a "global".  "Global11" exhibits behavior more like a traditional "global" variable, but that's because it's defined as a (Max-js) Dict object instead of int or string, and Dict objects are unique in that respect. There is only one instance of any Dict object (name)  "globally" inside any Max Runtime instance.  But that's not true for plain js types like int and string.

Please help me understand why C74 uses "global scope" throughout the javascript documentation instead of something less confusing like "script instance scope".  What "global" details am I failing to take into account?

Please help me wrap my head around what "global" actually means in the javascripting context.

[Max Patch]
Coming from a development...

understanding-c74s-use-of-the-phrase-global-variable-in-javascript-documentation

Understanding C74's use of the phrase "global variable" in javascript documentation

mattyo

For a project I'm working on, I need to import some images, and have both a matrix and a texture for each image. I've written a little js that creates a dictionary entry for each matrix/texture pair, but I'm failing to successfully pass the matrix successfully to the texture. I think I'm just not grokking matrixcalc().

Demo patch & js attached. Any help appreciated!

Hi,

For a project I'm working on, I need to import some images, and have both a matrix and a texture for each image. I've written a little...

passing-a-matrix-to-a-texture-in-js

passing a matrix to a texture in js

Just Evan

Since I am a complete novice in programming, I decided to ask you for help. 

Here is a reference to the filter I would like to get.

My thoughts: most likely, this is not a Band Pass filter, but two cutoff filters with adaptive Slope (from 12 to 48 dB/Octave). Moving up sets the distance between the bands and the filter slope, while moving horizontally sets the frequency. The amplitude range on the graph is from (unknown) to ~+6 dB.

If anyone can help me with this, I would be very grateful! Thank you! 

Since I am a complete novice in programming, I decided to ask you for help. 

Here is a reference to the filter I would like to...

need-help-creating-a-filter-interface-in-jsui-v8ui

Need help creating a filter interface in JSUI / V8UI

Pvdn

I'm creating a max for live device, and i was wondering if there is a way to make one single file out of it (for easy use/install) since i'm using javascript (and obviously an external js file).

embed-javascript-in-m4l-object

Embed javascript in M4L object?

Julien Vincenot

In order to test if the mouse is on a given object or not, I have made a little device based on [js].

I cannot use [hover] because the actual objects for which I need this test to take place cannot be expected to have a scripting name…

I have a getsize function in JS such as  : 

I added +35 empirically, I assume because of the toolbar (I'm not really sure how to handle that otherwise…).Inside the abstraction (which is just a test, I need this detection device in several objects), I compare the coordinates with a mousestate and then I get 0 or 1. Easy.

The tricky part for me was the zoom, it seemed I handled it well with the getattr("zoomfactor") and multiplying the coordinates

But remains for me a BIG issue : how to detect the object when the patching window is being scrolled away from the starting point? In this case, no matter what zoom % I have (even default 100%) the real box position and the mousestate cannot align anymore.  As show in this video :

Is there any way to retrieve the parent patcher scrolling drift? I'm not sure how to call that in English…

If you know an idea to detect if toolbar is on/off in parent patcher as well, I'm also interested…

Hello, 

In order to test if the mouse is on a given object or not, I have made a little device based on [js].

I cannot use [hover]...

measuring-parentpatchers-scrolling-drift

Measuring parentpatcher's "scrolling drift"?

Gabriel Lavoie Viau

 Sending large volumes of data from Max to [node.script] over time (even with no processing in Node) appears to cause unbounded growth in Max’s memory usage.

Hi, I've noticed some strange behavior with Node for Max. It seems that the more data is sent from Max to Node, the more memory gets allocated and this increase appears to be unbounded over time.

This becomes problematic in long-running contexts for example, using Node to relay DMX data to hardware continuously over a long period. The memory usage just keeps growing.

I’ve tried to isolate the issue with a patch that sends a bunch of data to a minimal Node script that does nothing except receive messages from Max.

const Max = require('max-api');

Max.addHandler('from_max_patch', (...data) => {
    // No processing, just receiving data
});

Is this behavior due to how Max handles data and memory under the hood, or is it a problem with the implementation of the Node for Max API?

Thanks in advance for any insight or suggestions!

TL;DR: Sending large volumes of data from Max to [node.script] over time (even with no processing in Node) appears to cause unbounded...

node-for-max-memory-issue

Node for Max Memory Issue?

attila

Hi all, I'm working on a project involving Node for Max and struggling to get a basic non-trivial patch running. 

Correct me if I'm wrong, but even with a custom @node_bin_path Node binary specified it seems like the node.script node process manager object in Max is hardcoded to import user scripts using the outdated CommonJS `require('xyz')` syntax.

Max.app/Contents/Resources/C74/packages/Node

The README states that Node v16.6.0 is used internally. In Node.js v12.17.0 and above it's possible to use dynamic imports. A compromise could be:

// if package.json nearest to the user script has type: 'module'

import(process.env.SCRIPT_PATH).then(() => {

These days, a number of package dependencies are being published in ESM-only formats. The broader implication is that it's not always feasible to convert an entire script to CommonJS. A modern Node project often comes with additional complexity, especially if there's Typescript transpilation or bundling involved. Often there are packages involved with add-on Node-API binaries (`.node`) that cannot be bundled and need to be marked as runtime externals (in my current case, one that's adding WebRTC support for Node). 

Is there a currently preferred workaround or consideration for this? It seems like I would have to resort to some kind of a Max for Node proxy to exchange messages with a locally running, completely separate node process.

Javascript Forum