PlaceOnEllipse = function (items, ellipse, startAngle, endAngle)
{
    if (startAngle === undefined) { startAngle = 0; }
    if (endAngle === undefined) { endAngle = 6.28; }

    var angle = startAngle;
    var angleStep = (endAngle - startAngle) / items.length;

    var a = ellipse.width / 2;
    var b = ellipse.height / 2;

    for (var i = 0; i < items.length; i++)
    {
        items[i].x = ellipse.x + a * Math.cos(angle);
        items[i].y = ellipse.y + b * Math.sin(angle);

        angle += angleStep;
    }

    return items;
}
Takes an array of Game Objects and positions them on evenly spaced points around the perimeter of an Ellipse.

If you wish to pass a `Phaser.GameObjects.Ellipse` Shape to this function, you should pass its `geom` property.

@function Phaser.Actions.PlaceOnEllipse
@since 3.0.0

@generic {Phaser.GameObjects.GameObject[]} G - [items,$return]

@param {(array|Phaser.GameObjects.GameObject[])} items - An array of Game Objects. The contents of this array are updated by this Action.
@param {Phaser.Geom.Ellipse} ellipse - The Ellipse to position the Game Objects on.
@param {number} [startAngle=0] - Optional angle to start position from, in radians.
@param {number} [endAngle=6.28] - Optional angle to stop position at, in radians.

@return {(array|Phaser.GameObjects.GameObject[])} The array of Game Objects that was passed to this Action.