GetPoints = function (line, quantity, stepRate, out)
{
    if (out === undefined) { out = []; }

    //  If quantity is a falsey value (false, null, 0, undefined, etc) then we calculate it based on the stepRate instead.
    if (!quantity && stepRate > 0)
    {
        quantity = Length(line) / stepRate;
    }

    var x1 = line.x1;
    var y1 = line.y1;

    var x2 = line.x2;
    var y2 = line.y2;

    for (var i = 0; i < quantity; i++)
    {
        var position = i / quantity;

        var x = x1 + (x2 - x1) * position;
        var y = y1 + (y2 - y1) * position;

        out.push(new Point(x, y));
    }

    return out;
}
Get a number of points along a line's length.

Provide a `quantity` to get an exact number of points along the line.

Provide a `stepRate` to ensure a specific distance between each point on the line. Set `quantity` to `0` when
providing a `stepRate`.

See also `GetEasedPoints` for a way to distribute the points across the line according to an ease type or input function.

@function Phaser.Geom.Line.GetPoints
@since 3.0.0

@generic {Phaser.Geom.Point[]} O - [out,$return]

@param {Phaser.Geom.Line} line - The line.
@param {number} quantity - The number of points to place on the line. Set to `0` to use `stepRate` instead.
@param {number} [stepRate] - The distance between each point on the line. When set, `quantity` is implied and should be set to `0`.
@param {(array|Phaser.Geom.Point[])} [out] - An optional array of Points, or point-like objects, to store the coordinates of the points on the line.

@return {(array|Phaser.Geom.Point[])} An array of Points, or point-like objects, containing the coordinates of the points on the line.