Photoshop script for preparing a sprite for rotating animation

ps-rotating-sprite.js

/**
 * Photoshop script for preparing a sprite for rotating animation.
 * Input : a starting sprite and number of frames
 * Output: the specified number of layers ready to be used in the PS animation tool
 */

var docRef = app.activeDocument;
var activeLayer = docRef.activeLayer;
var degToRotate = null; 
var newLayer = null; 
var secondLayer  = null;
// Number of frame in total, including the original one
var numFrames = prompt('How many frames, including the original frame(layer)?', 36); 
var degEachFrame = 360 / numFrames; // In degree

for(var i=0; i < numFrames - 1 ; i++) {
    degToRotate = degEachFrame * (i + 1); 
    newLayer = activeLayer.duplicate();
    newLayer.rotate(degToRotate); 
    newLayer.visible = false;
    if(!secondLayer) secondLayer = newLayer; 
}

// Move the original layer to the top sprite
activeLayer.move(secondLayer, ElementPlacement.PLACEBEFORE);