knob rotation image sequence generator script for photoshop

Make Knob.js

// photoshop knob generation script 
// This script assumes your source document contains a layer group
// called "indicator" that can be successively rotated around its
// center to generate a series of rotation state images.
// - Miles Egan January 2011

// change this to the number of discrete rotations you want
var numRotations = 65;
var rotAngle = 270;
var step = rotAngle / (numRotations - 1);

// save units
var originalUnit = preferences.rulerUnits;
preferences.rulerUnits = Units.PIXELS;

// setup dest doc
var src = app.activeDocument;
var savedState = src.activeHistoryState;
var dX = src.width;
var dY = src.height;
var dst = app.documents.add(dX, dY * numRotations);
dst.artLayers[0].isBackgroundLayer = false;
dst.artLayers[0].clear();

// build & copy rotations
for (var i = 0; i < numRotations; i++) {
    // reset state to avoid cumulative rotation noise
    app.activeDocument = src;
    src.activeHistoryState = savedState;

    var set = src.layerSets["indicator"];
    set.rotate(step * i, AnchorPosition.MIDDLECENTER);
    src.mergeVisibleLayers();
    src.artLayers[0].copy();

    app.activeDocument = dst;
    var dstRect = [
        [0, i * dY], [dX, i * dY], [0, (i + 1) * dY], [dX, (i + 1) * dY]
    ];
    dst.selection.select(dstRect);
    dst.paste();
}

// cleanup
app.activeDocument = src;
src.activeHistoryState = savedState;
app.activeDocument = dst;
dst.mergeVisibleLayers();
dst.artLayers[0].name = "knob";
preferences.rulerUnits = originalUnit;

hi,

does this still work in CC 2018? I just tried it but can't seem to get it to work...

This would be very handy to have!

correction yes it is still working! wonderful:)

so I need to have the indicator group at base level and selected it seems!