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Dan Nigrin

I'm trying to get around some of the clunkiness in using Max's built in objects to read in MIDI files (detonate, filein, seq, etc...).  Specifically, I'd like an easier way to read the actual tick counts for the delta time and duration times for each note (rather than msec which detonate outputs), as well as the tempo.  

I started to explore using some existing Javascript libraries to do this, but sadly, my Javascript skills are not great, especially in Max.  V8, Node.js, etc... are all pretty new for me.  I came across this, 

https://cycling74.com/projects/midi-parsing-using-javascript-in-max

 , which looked promising, but no accompanying help file to walk through its usage.

I also see midi-parser-js as a Node NPM project which looks even better, and I can load it into a node.script object in Max, but then don't know how to use it from there:  

https://www.npmjs.com/package/midi-parser-js

There's also midi-file, another NPM project, but again, just don't know what to do once loaded 

I'm trying to get around some of the clunkiness in using Max's built in objects to read in MIDI files (detonate, filein, seq, etc...). ...

midi-file-parsing-javascript-help

MIDI file parsing - Javascript help

Toby Fox

In a JS script, you can get all selected tracks by iterating over tracks and checking 

, which works if someone has shift+clicked multiple tracks directly. But I don't see any similar property for clips.

In session view you can shift+click multiple clips, and in arrangement view you can click and drag a timeline selection across multiple tracks (thereby selecting multiple clips), but I can't find any way to get access this info, and actually these actions only set 

 on the first track selected this way. Even being able to get the timeline selection range would be useful, but I don't think this is possible either.

Is there maybe a way to use observers to track multiple selected clips? Any other ideas?

Is there any way to get all selected clips in JS?

is-there-any-way-to-get-all-selected-clips-in-js

klaus filip

is it possible to hold more than one parameter in a jsui/v8ui ?

or is it strictly fixed to the one and only varname?

is it possible to hold more than one parameter in a jsui/v8ui ?

..tweaking with
notifyclients()
getvalueof()
setvalueof()

or is it...

more-than-one-parameter-in-a-jsuiv8ui

more than one parameter in a jsui/v8ui ?

weuoimi 

Hello, i've been working on a patch with 3d-animated graph flood-fill recursive algorithm, the main feature of which is that each transition between two vertices is asynchronous and time-consuming. The algo resembles tree traversing algorithm in some way. During testing, i noticed that sometimes the animations are either skipped or started at the wrong time in wrong vertices. I've tested the algorithm in vanilla js and it worked fine, but trying to tie up jit.gl object creation and using jit.gl.node for animation of the gridshapes leads to the strange behaviour. I do not exclude the possibility that I just wrote the algorithm badly, but I tried many different variations and in all cases the problems were the same, and even in the same vertices.

That's why i want to know about some intricacies of using JitterObject and Tasks inside of async functions, i suppose that causes the issue. Here is a problematic code, fill() is the algorithm itself:

class FloodFill {

    constructor(graph, animationSpeed) {
        this.graph = graph;
        this.animationSpeed = animationSpeed;
    }

    async animateImpulse(startCoord, endCoord, speed) {
        return new Promise((resolve) => {
            const gridshape = new JitterObject("jit.gl.gridshape", contextName);
            gridshape.shape = "cone";
            gridshape.color = [Math.random(), Math.random(), Math.random()];

            const animNode = new JitterObject("jit.anim.node");
            gridshape.anim = animNode.name;
            animNode.movemode = "local";
            animNode.scale = impulseScale;
            animNode.position = startCoord;
            animNode.lookat = endCoord;

            const animDrive = new JitterObject("jit.anim.drive");
            animDrive.targetname = animNode.name;
            animDrive.move(0, 0, speed);

            const goalVector = endCoord.map((v, i) => v - startCoord[i]);

            const checkPosition = new Task(() => {
                const pos = animNode.worldpos;
                const currentVector = pos.map((v, i) => v - startCoord[i]);

                if (veclength(currentVector) >= veclength(goalVector)) {
                    // post("Animation complete\n");
                    gridshape.freepeer();
                    animNode.freepeer();
                    animDrive.freepeer(); 
                    checkPosition.cancel();
                    resolve();  
                    // post("Resolved promise\n");
                }
            });

            checkPosition.interval = worldposQueryInterval;
            checkPosition.repeat();
        })
    }

    async fill(startVertexId, stepsLeft, actionCallback) {
        if (stepsLeft <= 0) {
            post("Stopped at vertex: ", startVertexId, ", no steps left\n");
            return;
        }

        const connections = this.graph[startVertexId]?.connections || [];

        if (connections.length === 0) {
            post("Stopped at vertex: ", startVertexId, ", no connections\n");
            return;
        }

        const powerPerConnection = Math.floor(stepsLeft / connections.length);
        post("Power per connection: ", powerPerConnection, "\n");

        if (powerPerConnection <= 1) {
            post("Power per connection too low, stopping recursion\n");
            return;
        }

        try {
            await Promise.all(connections.map(async (nextVertexId) => {
                try {
                    await this.animateImpulse(
                        this.graph[startVertexId]?.coordinates,
                        this.graph[nextVertexId]?.coordinates,
                        animationSpeed * scaleToAnimationSpeed(this.graph[startVertexId], this.graph[nextVertexId])
                    );
                    // if the "bang" attribute is set and true, actionCallback is called
                    if (this.graph[nextVertexId]?.bang) {
                        actionCallback(nextVertexId, this.graph[nextVertexId]?.cell);
                    }
                } catch (e) {
                    post("Error in animateImpulse: ", e, "\n");
                }
 
                await this.fill(nextVertexId, powerPerConnection - 1, actionCallback);
            }));
        } catch (e) { 
            post("Error resolving Promise in fill: ", e, "\n");
        }
    }
}

Hello, i've been working on a patch with 3d-animated graph flood-fill recursive algorithm, the main feature of which is that each...

js-jitter-unexpected-behavior-when-executing-many-async-processes-with-jitgl-objects-in-v8

[JS, Jitter] Unexpected behavior when executing many async processes with jit.gl objects in v8

Hello, I'm begging for help, no matter which way I try it doesn't work. 

My goal is to make a gridshape move from one coordinate to another, and when it reaches the destination coordinates, it deletes itself

There aren't any errors in logs, but the node's gridshape just continues moving, passing the endCoord and doesn't stop and deleting itself when it's worldpos equals or more than it's route destination point, which is weird because at some moment, the world position of the node is clearly more than endCoord, but the if statement in queryWorldPos() just doesn't execute, why?

Hello, I'm begging for help, no matter which way I try it doesn't work. 

My goal is to make a gridshape move from one coordinate to...

jitter-js-api-the-issue-with-jitanimnode-worldpos-and-if-statement

jitter, js api: The issue with jit.anim.node worldpos and if statement

It's unclear for me how to monitor the position of gridshape being transfered by anim.node from one point to another. In the async Promise i have to resolve the function and free memory when animation is done, in other words stop the animation when the end coordinate is reached. Can't find in docs and examples.

I'll share the code snippet I have problems with below, with three of my unsuccessful attempts commented out. I have also tried to use Task for these purposes but it didn't go well either.

It's unclear for me how to monitor the position of gridshape being transfered by anim.node from one point to another. In the async Promise...

jitter-javascript-tracking-down-the-position-of-gridshape-being-transferred-by-jitanimnode-in-js-api-async-function-1

[Jitter, JavaScript] Tracking down the position of gridshape being transferred by jit.anim.node in js api async function 

jitter-javascript-tracking-down-the-position-of-gridshape-being-transferred-by-jitanimnode-in-js-api-async-function

Barney Watson

I've taken a bit of a deep-dive into MGraphics since Max 9 came out with the new v8ui object and ES6 support. Over the past couple of days I've been working on an audio-reactive dial.

I was trying to apply a radial gradient fill to a part of the dial. According to both the MGraphics quick-start guide, and the more thorough Max JS API documentation, pattern_create_radial takes 6 arguments: the x and y coordinates of the centre of the first colour stop, its radius, the x and y coordinates of the centre of the second colour stop, and its radius.

In practice, this does not work - the whole shape is filled with the solid colour set for the second colour stop. For example (with relative_coords = 0)...

with (mgraphics){
	arc(0, 0, 200, 0, 2 * Math.PI);
		
	let inner_gradient = pattern_create_radial(0, 0, 50, 0, 0, 100);
        inner_gradient.add_color_stop_rgba(0, 1, 1, 1, 1);
        inner_gradient.add_color_stop_rgba(1, 1, 0, 0, 1);

        set_source(inner_gradient);
	fill();
}

...displays the bottom-right quarter of a circle, filled with solid red.

However, running pattern_create_radial with four arguments appears to work 'correctly'. The first two arguments are the x and y coordinates of the centre of the gradient. The third argument seems to have no effect. The fourth argument is the radius of the first colour stop of the gradient. For example...

with (mgraphics){
	arc(0, 0, 200, 0, 2 * Math.PI);
		
	let inner_gradient = pattern_create_radial(0, 0, 0, 200);
        inner_gradient.add_color_stop_rgba(0, 1, 1, 1, 1);
        inner_gradient.add_color_stop_rgba(1, 1, 0, 0, 1);

        set_source(inner_gradient);
	fill();
}

...displays the bottom-right quarter of a circle, filled with a gradient from white to red.

 guide notes that the pattern_create_radial command was, at least when it was written in 2013, 'not currently working'. I'm unsure whether this bug was eventually fixed - or if I'm experiencing the same issue. At the same time, I might just be misreading the documentation and missing something obvious.

MGraphics radial gradients appear to be broken

incorrect-documentation-for-mgraphics-patterncreateradial

nicenquick n

Recently I've been editing code in js and I need to call the object that sends the audio (s~) and the object “s”, but I didn't find a solution in the manual

Recently I've been editing code in js and I need to call the object that sends the audio (s~) and the object “s”, but I didn't find a...

i-want-to-ask-how-to-call-the-object-s-in-js

I want to ask how to call the object “s~” in js.

Oni Shogun

I have not found any reference to the JS-objects like 

, etc., in the new Max 9 documentation. Since they still work in V8 and of course in JS I am a bit puzzled as to where these can be found now… any ideas?

What happened to the JS reference for Buffer Object, Dict Object, etc. ?

Javascript Forum