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neuwirthe

I need help with writing a javascript offset

The function below produces values at the output.

How do I get the values of these 2 inputs into the arguments of the function.

Or how can I assign the values to variables within the function.


inlets = 2; // Define the number of inlets
outlets = 2; // Define the number of outlets
setinletassist(0,"inpitch")
setinletassist(1,"invelocity")
setoutletassist(0,"outpitch")
setoutletassist(1,"outvelocity")
function msg_int(pitch, invelocity){
	outlet(0,100+1)
        outlet(1,100/2)
}

I need help with writing a javascript offset

The function below produces values at the output.

But I want outlet(1, inpitch+1) and...

javascript-help-needed-for-writing-an-object

Javascript help needed for writing an object

En Chilada

This might be a noob (js or max) question, but anyway:

In the node.script help "basic" tab, if I press the "script npm --version",

in the "npm" tab, if I press "script npm version",

the node.script debug tool always returns "Cannot read properties of null (reading 'once').

Is this normal and/or do I have do anything else to use npm?

This might be a noob (js or max) question, but anyway:

In the node.script help "basic" tab, if I press the "script npm --version",

or

in...

help-with-npm

help with npm

Fynn Konig

I´m just trying out the javascript for Max implementation. However, I don´t seem to find anything on how to create classes. When I try to define one with the "class 

js: BPMMachine.js: Javascript SyntaxError: missing ; before statement, line 6

Besides that I didn´t find any information or examples with javascript classes. Hoping for you to help me out, maybe I´m just missing something really simple?

I´m just trying out the javascript for Max implementation. However, I don´t seem to find anything on how to create classes. When I try to define one with the "class classname {}" Syntax, I get the following error:

Hey there everyone,
I´m just trying out the javascript for Max implementation. However, I don´t seem to find anything on how to create class

javascript-classes-in-maxmsp

Maybe I´ve postet this too early, seems the whole ES6 Syntax doesnt work as its not implemented?! Found this interesting page:
https://cycling74.com/forums/any-plans-to-update-support-for-recent-versions-of-js 
Guess I´l have to live with it then...

For those in the future, I found this tutorial very helpful for learning the old syntax and techniques to write classes in a Max js object...
https://www.newthinktank.com/2015/09/object-oriented-javascript/ 

Javascript Classes in MaxMSP

Just Evan

I'm trying to make a device that dynamically monitors changes in the chains of the drumrack device, namely whether the name of any of the 128 (0-127) chain changes. 

Since I am an absolute beginner in javascriprt, I made this script using chat GPT, this is all I could get out of it after spending a couple of months. It is also likely that the script is far from ideal.

I would like the script to display the id of the chains in which changes occurred and the new name of the chain (Chain: id N, Name Changed: New Name). 

inlets = 1;
outlets = 1; // Set one outlet for sending chain ID

var observers = [];
var previousNames = []; // Array to store previous chain names
var pathPrefix = "";
var chainsObserver;
var maxChains = 128;

// Function to create an observer for a chain
function createObserver(index) {
    if (observers[index]) {
        observers[index].property = "";
    }
    var observer = new LiveAPI(callback, pathPrefix + " chains " + index);
    observer.property = "name";
    observers[index] = observer;
    previousNames[index] = ""; // Initialize previous name
}

// Callback function to handle name changes
function callback(args) {
    var index = args[0]; // Assume the first argument is the chain index
    var newName = args[1]; // Second argument is the new chain name

    // Check if the name has changed
    if (previousNames[index] !== newName) {
        previousNames[index] = newName; // Update previous name
        post("Chain ID: " + index + ", New Name: " + newName + "\n"); // Debug message
        outlet(0, index); // Send chain ID through the first outlet
    }
}

// Function to track changes in the chain list
function observeChains() {
    if (chainsObserver) {
        chainsObserver.property = "";
    }
    chainsObserver = new LiveAPI(chainsCallback, pathPrefix);
    chainsObserver.property = "chains";
}

// Callback function to handle changes in the chain list
function chainsCallback(args) {
    // Update observers only for active chains
    for (var i = 0; i < maxChains; i++) {
        if (i < args.length - 1) { // Check if the chain exists
            createObserver(i);
        }
    }
}

// Function to set the path and create initial observers
function setPath(path) {
    pathPrefix = path;
    observeChains();
}

// Message to set the path
function anything() {
    var args = arrayfromargs(messagename, arguments);
    outlet(0, args); // Send input message through the first outlet

    if (args[0] == "path") {
        var path = args.slice(1).join(" ");
        setPath(path);
    }
}

Note: In the inlet of the script I send a message containing the path to my drumrack, something like "path live_set tracks 0 devices 2"

Hello. 

I'm trying to make a device that dynamically monitors changes in the chains of the drumrack device, namely whether the name of any...

js-chain-observer-for-rackdevice-drumrack

JS Chain Observer for RackDevice (DrumRack)

AudioMatt

I know this is silly but I nearly missed that I could deduce the sample rate of a buffer like this so 

    var buf = new Buffer("myBuffer");

    post("samplerate: ",buf.samplerate(),"\n"); 

Buffer.prototype.samplerate = function(){

    return 1000*this.framecount()/this.length()

I know this is silly but I nearly missed that I could deduce the sample rate of a buffer like this so for anyone searching in the future:

function bang(){
	var buf = new Buffer("myBuffer");
	post("samplerate: ",buf.samplerate(),"\n"); 
}
Buffer.prototype.samplerate = function(){
	return 1000*this.framecount()/this.length()
}

I know this is silly but I nearly missed that I could deduce the sample rate of a buffer like this so for anyone searching in the future:

f

buffer-samplerate-javascript

Buffer Samplerate Javascript

Federico-AmazingMaxStuff

Here I want to collect all the less intuitive Javascript syntax and techniques for Max. 

Feel free to comment everything that comes to your mind related to the subject, I'll add it to the list. 

Max JS uses ES5 version, so features like "let" and Classes added in ES6 will not work.

https://docs.cycling74.com/max8/vignettes/javascriptinmax

http://max-javascript-reference.tim-schenk.de/

In this video we see how we can call a callback function in JS every time an object in the patcher changes state. 
This is useful for example for creating dynamic UI that can be reduced or expanded without having to use patchcoord connections. 

Download the patch and JS file from my Patreon (1€ Tier) ► 
https://www.patreon.com/posts/patcher-in-js-55403240

Here you can find all my video tutorials ► https://www.federicofoderaro.com/videoTutorials.html

Follow Amazing Max Stuff on Instagram ► https://www.instagram.com/amazingmaxstuff/

Join my Patreon to support Amazing Max Stuff and get lots of Patches for the Visuals ► https://www.patreon.com/mediacoding

Take a look at my shared patches ► https://www.federicofoderaro.com/patches.html

#maxmsp #cycling74 #tutorials #javascript #scripting #objlistener #thispatcher

Max/MSP Patcher Scripting in Javascript | maxobjlistener

Set the input you want to send the next texture:

myGLPix.param("<param_name>", <param_value> / [<array_of_param_values>]);

myGLPix.jit_gl_texture("<texture_to_process_name>");

myGLPix.draw(); // IMPORTANT, the jit.gl.pix obj needs also to draw

var myProcessedTexture = myGLPix.out_name;

Here I want to collect all the less intuitive Javascript syntax and techniques for Max. 
Feel free to comment everything that comes to your mind related to the subject, I'll add it to the list. 

Max JS uses ES5 version, so features like "let" and Classes added in ES6 will not work.

Max's documentation for JS: 
https://docs.cycling74.com/max8/vignettes/javascriptinmax 

Tim's JS Reference:
http://max-javascript-reference.tim-schenk.de/ 

Get keys pressed in JS:
https://github.com/cskonopka/maxJS 

Create a new Max object: 
var myObj = this.patcher.newdefault(<obj_pos_x>, <obj_pos_y>, "<max_obj_name>"); 

Add arguments to Object when creating it: 
var anotherObject = p.newdefault(100, 100, "combine", "text", "::", "moretext")

Add Object to Presentation: 
maxObject.presentation(1);    // note that it's a function

Move Object:maxObject.message("patching_position", [posX, posY]);

Create a new "bpatcher" object with attributes: 
var myNewObject = p.newdefault(100, 100, "bpatcher", "@name", "myPatch", "@args", name);

Get patcher file path:         var filepath = this.patcher.filepath;

Rescale Max Object: 
this.patcher.script("sendbox", <max_obj>.varname, "patching_rect", [ <obj_pos_x>, <obj_pos_y>, <obj_size_x>, <obj_size_y> ]);

Hide a Max Object:
<max_obj>.hidden = val;

Rescale Max Object in Presentation:  
this.patcher.script("sendbox", <max_obj>.varname, "presentation_rect", [ <obj_pos_x>, <obj_pos_y>, <obj_size_x>, <obj_size_y> ]);

Bring to Front/Back Max Object: 
this.patcher.script("bringtofront" / "sendtoback", <max_obj>.varname); 

Connect two Max objects: 
this.patcher.connect(<max_obj_1>, <outlet_index>, <max_obj_2>, <inlet_index>);

Connect two Max objects with hidden cable:  
this.patcher.hiddenconnect(<max_obj_1>, <outlet_index>, <max_obj_2>, <inlet_index>);

Javascript Forum