JSUI UN KNOB! V1.1

What is JSUI UN KNOB!?

JSUI_UN_KNOB is a Max 8 tool for designing and authoring JSUI knobs without having to do any coding! I know!

Editor in Max

Some examples

Why is JSUI UN KNOB?!

Good question. It basically started out as a little learning project I made for myself whilst trying to learn JSUI in Max. Then it morphed into an arguably useful little tool.

Because of it's editor-based nature, the JSUI code for drawing the knobs isn't bleeding-edge efficient. The code is fairly readable though and structured fairly nicely so if you know your way around you could probably hack out the parts/options you don't need to make the payload smaller.

It's also obviously designed through my own lens of what I thought were handy/cool features. Again, if you've got some experience you should easily be able to take some of the code and change it for your own purposes or even extend/add to it.

Any questions on that front you can regularly find me on the Max Dicord server as 'neilbaldwin'

Support My Work

If you like my work and use it or learn from it, please consider supporting me or just a donation to say thanks:

🙏

Requirements

As it's a Max 8 patcher/Javascript tool you'll need Max 8.

Installation

Unzip the contents into a foler. Put the folder in your Max File Preferences paths.

Usage and Warranty

Use at your own risk. There isn't really any risk but of course you can never be 100% sure. If something goes wrong then I'm very sorry in advance. On the other hand, if JSUI_UN_KNOB positively changes your life in a meaningful way I will take credit for that.

Version History

V1.1 release, September 2023.

Contents

JSUI_UN_KNOB has multiple files:

• JSUI_UN_KNOB_ED.maxpat
  This is the Max patcher file that containts the editor. Here you can editor your knob designs and save them as a .JSON file.

• JSUI_UN_KNOB_ED.js
  This the the Javascript file loaded by the editor .maxpat

• JSUI_UN_KNOB.js
  This is the JSUI wrapper that you would include in your Max project once you have designed a knob with the editor. You can specify the knob JSON file in the JavaScript File parameter in the jsui section in the Max Inspector window/panel.

• JSUI_UN_KNOB_CLASS.js
  This is the "class" file that contains the code for drawing the knob.

• JSUI_UN_KNOB_VALUE_SLIDER.maxpat and JSUI_UN_KNOB_COLOR_PICKER.maxpat
  These are two helper bpatchers for value and color editing in the editor.

• defaultKnob.json
  This is the definition for the default knob and is loaded by the editor on opening.

• JSUI_UN_KNOB_DOCS.md
  This file.

How To Use JSUI_UN_KNOB

• Load the JSUI_UN_KNOB_ED.maxpat into Max.

• Edit the knob design using the handy controls.

• Save your amazing design to a JSON file.

• Add a JSUI object to your Max project with the following parameters:

  JSUI @filename JSUI_UN_KNOB.js @jsarguments yourKnob.json

• Ponder at how much time I just saved you and send me a coffee as a token of your grattitude.

Editor Controls

Knob Shape

You can choose between round and fluted. In fluted mode "Highlight Width" and "Highlight Offset" control fluting parameters. See below.

Knob Mode

You can choose betwen UNIPOLAR and BIPOLAR. This affects both the style of the Indicator (see below) and also the output from the knob. In UNIPOLAR mode the output goes from 0.0 to 1.0 and in BIPOLAR mode the output goes from -1.0 to 1.0.

Rotation Angle

This sets the total angle of the knob rotation. You can vary it between 90 and 340 degrees.

Knob Radius

This sets the radius size relative to the JSUI patcher rectangle size. You can scale the JSUI (JSUI_UN_KNOB.js) patcher as you'd expect. This control just sets the relative size of the knob to the patcher rectangle.

Indicator Type

Indicator refers to an added graphical feature that gives you an graphical indication of the knob's value. There are several types to choose from:

• NONE - you know....none.
• LINE1 - displays static radial lines around the knob circumference
• LINE2 - same as LINE1 but every other line is half the height
• ARC - displays a dynamic colored arc around the knob
• RNDLED1 - displays an arc of round "LED"s around the knob
• RNDLED2 - similar to RNDLED1 but the "off" LEDs can be transparent
• RECTLED1 - same as RNDLED1 but the "LED"s are rectangular
• RECTLED2 - same as RNDLED2 but the "LED"s are rectangular

NONE, LINE1 and LINE2 are static as in they are not animated.

ARC, RNDLED1, RNDLED2, RECTLED1, RECTLED2 are animated.

Indicator Segments

For RNDLEDx and RECTLEDx this defines how many LEDs make up the indicator.

Indicator Width

For RND/RECTLED this is the width of the individual segments. For indicator type "ARC" this defines the thickness of the arc.

Indicator Height

This only affects RECTLED1/RECTLED2 and defines the height of the rectangular segments.

Indicator Offset

This defines the space between the knob and the indicators.

Indicator Border For RND/RECTLED indicators, this is the stroke width on the segments. For indicator "ARC" this is the the stroke width on the arc.

Pointer Length

This determines the overall length of the knob pointer. You can vary this between 0 (off) and 2.0 which spans the entire knob (the value is a ratio of the overall knob diameter).

Pointer Width

This determines the width of the pointer.

Pointer Offset

This defines the position of the pointer from the circumference of the knob.

Outline is a graphical element defined outwards from the circumference of the knob. Highlight is a graphical element defined inwards from the circumference of the knob.

Outline Width

Outline is a stroke added to the outer edge of the circumference of the knob. This defines the width of the stroke.

Outline Offset

This defines the position offset of the highlight from the outer edge of the knob. Positive values move the outline away from the edge of the knob.

Highlight Width/Flutes

• In Knob Shape: ROUND, this defines the width of the stroke of an ellipse drawn from the inside of the knob circumference.

• In Knob Shape: FLUTED this determines the number of flutes or ridges in the knob's circumference.

Highlight Offset/Flute Radius

• In Knob Shape: ROUND this defines the position of the Highlight ellipse from the inside edge of the knob circumference. Poisitve values move the Highlight towards the knob center.

• In Knob Shape: FLUTED this defines the inner radius of the flutes.

Shadow X / Shadow Y

This defines the X/Y position of the shadow in relation to the knob. Offsets can be positive or negative.

Color Parameters

Set colors by clicking on the color swatch. This will open up a system color picker.

Body Color This is the main color of the knob.

Pointer Color This sets the color of the knob pointer.

Indicator Colors

• In indictor modes LINE1 and LINE2, Indicator Color 1 sets the fill color of the lines.

• In ARC + UNIPOLAR mode, Indicator Color 1 sets the "on" color and Indicator Color 3 sets the "off" color. In ARC + BIPOLAR mode, Indicator Color 3 sets the "off" color while Color 1 and 2 set the left and right arc colors respectively.

• In RNDLED1 and RECTLED1 indicator modes, Indicator Color 1,2 and 3 set the "normal", "high" and "highest" mimicking a LED VU meter. Segments to the right of the pointer are displayed black.

• RNDLED2 and RECTLED2 indicator modes, Indicator Color 1, 2 and 3 work the same as RNDLED1 and RECTLED1 but segments to the right of the pointer are transparent versions of Color 1, 2 and 3 (depending on the pointer position). You can set the transparency of the segments with Indicator Off Alpha.

Indicator Border Color

Sets the color of the border around each indicator segment.

Indicator Off Alpha

In Indicator Modes RNDLED2 and RECTLED2 this sets the transparency of the indicator segments to the right of the pointer.

Outline Color

Sets the color of the Outline.

Highlight Color

Sets the color of the Highlight.

Shadow Color

And this sets the color of the shadow.

BG Color

You can use this to set the color behind the knob. This is only for the editor. The knob background is always transparent when you use them in your own application.

Load and Save

You can click the Load Knob and Save Knob buttons to load and save knob presets to disk. The presets are saved as a JSON file.

On loading the editor the file "defaultKnob.json" is loaded.

Compile JS

This button is included to enable you to manually recompile the editor Javascript file. The autowatch feature is enabled which means the script should recompile itself when required but sometimes it doesn't behave properly.

WARNING: clicking this will reset the editor to default so you will lose any edits you've made unless you've saved the knob file.