Function cloud

docs/app/js/sanddance-app.js:140717–140872

()

// Algorithm due to Jonathan Feinberg, http://static.mrfeinberg.com/bv_ch03.pdf
var cloudRadians = Math.PI / 180, cw = 64, ch = 2048;
function cloud() {
    var size = [
        256,
        256
    ], text, font, fontSize, fontStyle, fontWeight, rotate, padding, spiral = archimedeanSpiral, words = [], random = Math.random, cloud1 = {};
    cloud1.layout = function() {
        var contextAndRatio = getContext((0, _vegaCanvas.canvas)()), board = zeroArray((size[0] >> 5) * size[1]), bounds = null, n = words.length, i = -1, tags = [], data = words.map((d)=>({
                text: text(d),
                font: font(d),
                style: fontStyle(d),
                weight: fontWeight(d),
                rotate: rotate(d),
                size: ~~(fontSize(d) + 1e-14),
                padding: padding(d),
                xoff: 0,
                yoff: 0,
                x1: 0,
                y1: 0,
                x0: 0,
                y0: 0,
                hasText: false,
                sprite: null,
                datum: d
            })).sort((a, b)=>b.size - a.size);
        while(++i < n){
            var d1 = data[i];
            d1.x = size[0] * (random() + .5) >> 1;
            d1.y = size[1] * (random() + .5) >> 1;
            cloudSprite(contextAndRatio, d1, data, i);
            if (d1.hasText && place(board, d1, bounds)) {
                tags.push(d1);
                if (bounds) cloudBounds(bounds, d1);
                else bounds = [
                    {
                        x: d1.x + d1.x0,
                        y: d1.y + d1.y0
                    },
                    {
                        x: d1.x + d1.x1,
                        y: d1.y + d1.y1
                    }
                ]; // Temporary hack
                d1.x -= size[0] >> 1;
                d1.y -= size[1] >> 1;
            }
        }
        return tags;
    };
    function getContext(canvas) {
        canvas.width = canvas.height = 1;
        var ratio = Math.sqrt(canvas.getContext("2d").getImageData(0, 0, 1, 1).data.length >> 2);
        canvas.width = (cw << 5) / ratio;
        canvas.height = ch / ratio;
        var context = canvas.getContext("2d");
        context.fillStyle = context.strokeStyle = "red";
        context.textAlign = "center";
        return {
            context: context,