Function makeExitSliceInterpolator

src/traces/sunburst/plot.js:325–368

(pt)

    });

    function makeExitSliceInterpolator(pt) {
        var id = helpers.getPtId(pt);
        var prev = prevLookup[id];
        var entryPrev = prevLookup[helpers.getPtId(entry)];
        var next;

        if (entryPrev) {
            var a = (pt.x1 > entryPrev.x1 ? 2 * Math.PI : 0) + baseX;
            // if pt to remove:
            // - if 'below' where the root-node used to be: shrink it radially inward
            // - otherwise, collapse it clockwise or counterclockwise which ever is shortest to theta=0
            next =
                pt.rpx1 < entryPrev.rpx1
                    ? { x0: pt.x0, x1: pt.x1, rpx0: 0, rpx1: 0 }
                    : { x0: a, x1: a, rpx0: pt.rpx0, rpx1: pt.rpx1 };
        } else {
            // this happens when maxdepth is set, when leaves must
            // be removed and the rootPt is new (i.e. does not have a 'prev' object)
            var parent;
            var parentId = helpers.getPtId(pt.parent);
            slices.each(function (pt2) {
                if (helpers.getPtId(pt2) === parentId) {
                    return (parent = pt2);
                }
            });
            var parentChildren = parent.children;
            var ci;
            parentChildren.forEach(function (pt2, i) {
                if (helpers.getPtId(pt2) === id) {
                    return (ci = i);
                }
            });
            var n = parentChildren.length;
            var interp = interpolate(parent.x0, parent.x1);
            next = {
                rpx0: rMax,
                rpx1: rMax,
                x0: interp(ci / n),
                x1: interp((ci + 1) / n)
            };
        }

        return interpolate(prev, next);
    }

    function makeUpdateSliceInterpolator(pt) {
        var prev0 = prevLookup[helpers.getPtId(pt)];