AE ENHANCERS

function changeMaskColors() {
    app.beginUndoGroup ( "Change Mask Colors");
    if (!app.project || !(app.project.activeItem instanceof CompItem) || app.project.activeItem.selectedLayers < 1) {
        alert ("Please select at least one layer");
        return;
    }
    var curItem = app.project.activeItem; // current composition
    var curLayers = curItem.selectedLayers; // currently selected layers
    var curLayer;
    var numMasks;
    var colorR, colorG, colorB;

    for (i = 0; i < curLayers.length; i++) {
        curLayer = curLayers[i];
        numMasks = curLayer.Masks.numProperties; // number of masks on the current layer
        for (j = 1; j <= numMasks; j++) {
            colorR = Math.round( Math.random()*254);
            colorG = Math.round( Math.random()*254);
            colorB = Math.round( Math.random()*254);
            curLayer.property("Masks").property(j).color = [colorR/255,colorG/255,colorB/255];
        }
    }
    app.endUndoGroup ();
}

changeMaskColors();

function rgbToHsv(r, g, b){
    r = r/255, g = g/255, b = b/255;
    var max = Math.max(r, g, b), min = Math.min(r, g, b);
    var h, s, v = max;

    var d = max - min;
    s = max == 0 ? 0 : d / max;

    if(max == min){
        h = 0; // achromatic
    }else{
        switch(max){
            case r: h = (g - b) / d + (g < b ? 6 : 0); break;
            case g: h = (b - r) / d + 2; break;
            case b: h = (r - g) / d + 4; break;
        }
        h /= 6;
    }

    return [h, s, v];
}

function changeMaskColors() {
    app.beginUndoGroup ( "Change Mask Colors");
    if (!app.project || !(app.project.activeItem instanceof CompItem) || app.project.activeItem.selectedLayers < 1) {
        alert ("Please select at least one layer");
        return;
    }
    var curItem = app.project.activeItem; // current composition
    var curLayers = curItem.selectedLayers; // currently selected layers
    var curLayer;
    var numMasks;
    var colorR, colorG, colorB;
    var saturation = .7; // set values 0 to 1
    var brightness = .7; // set values .01 to .99
    var myHsl = [];
    var maskColor;
    var maskHue = [0,0,0];
   
    if (saturation < 0 || saturation > 1) {
        alert ("Invalid saturation number");
        return;
    }
    if (brightness <= 0 || brightness >= 1) {
        alert ("Invalid brightness number");
        return;
    }

    for (i = 0; i < curLayers.length; i++) {
        curLayer = curLayers[i];
        numMasks = curLayer.Masks.numProperties; // number of masks on the current layer
        for (j = 1; j <= numMasks; j++) {
             
            if (j > 1) {
                maskColor = curLayer.property("Masks").property(j-1).color;
                maskHue = rgbToHsl(maskColor[0], maskColor[1], maskColor[2]);
            }
            colorR = colorG = colorB = 0;
            myHsl = [0,0,0];
            while (myHsl[2] < brightness || myHsl[1] < saturation || Math.abs(myHsl[0] - maskHue[0]) < 1/numMasks ) {
                colorR = Math.round( Math.random()*254);
                colorG = Math.round( Math.random()*254);
                colorB = Math.round( Math.random()*254);
                myHsl = rgbToHsv (colorR, colorG, colorB);
            }
            curLayer.property("Masks").property(j).color = [colorR/255,colorG/255,colorB/255];
        }
    }
    app.endUndoGroup ();
}

changeMaskColors();

function hsvToRgb(h, s, v){
    var r, g, b;

    var i = Math.floor(h * 6);
    var f = h * 6 - i;
    var p = v * (1 - s);
    var q = v * (1 - f * s);
    var t = v * (1 - (1 - f) * s);

    switch(i % 6){
        case 0: r = v, g = t, b = p; break;
        case 1: r = q, g = v, b = p; break;
        case 2: r = p, g = v, b = t; break;
        case 3: r = p, g = q, b = v; break;
        case 4: r = t, g = p, b = v; break;
        case 5: r = v, g = p, b = q; break;
    }

    return [r, g, b];
}

function rainbowMasks() {
    app.beginUndoGroup ( "Rainbow Mask Colors");
    if (!app.project || !(app.project.activeItem instanceof CompItem) || app.project.activeItem.selectedLayers < 1) {
        alert ("Please select at least one layer");
        return;
    }
    var curItem = app.project.activeItem; // current composition
    var curLayers = curItem.selectedLayers; // currently selected layers
    var curLayer;
    var numMasks;
    var color;
    var minSat = .7; // set this to the lowest saturation you would like
    var minVal = .7; // set this to the lowest brightness you would like
    var rainbow = false; // set this to true for a pure color spectrum, set this to false for more variation
    var startingHue;
    var maskHue, maskSat, maskVal;
   
    if (minSat < 0 || minSat > 1) {
        alert ("Invalid minSat color");
        return;
    }
    if (minVal < 0 || minVal > 1) {
        alert ("Invalid minVal color");
        return;
    }

    for (i = 0; i < curLayers.length; i++) {
        startingHue = Math.random();
        curLayer = curLayers[i];
        numMasks = curLayer.Masks.numProperties; // number of masks on the current layer
        for (j = 1; j <= numMasks; j++) {
            maskSat = maskVal = 0;
            maskHue = (j-1)/numMasks + startingHue;
            if (maskHue > 1) maskHue -= 1;       
            if (!rainbow) {
                while (maskVal < minVal || maskSat < minSat) {
                    maskVal = Math.random();
                    maskSat = Math.random();               
                }
            } else {
                maskVal = 1;
                maskSat = 1;
            }
            color = hsvToRgb(maskHue, maskSat, maskVal);
            curLayer.property("Masks").property(j).color = color;
        }
    }
    app.endUndoGroup ();
}

rainbowMasks();