getRandomFigure.js

getRandomFigure() {
    /*
    * Nombres de los tetrominós tomados de: https://www.joe.co.uk/gaming/tetris-block-names-221127
    * Regresamos una nueva instancia en cada ocasión, pues si definiéramos las figuras en constantes o variables, se tomaría la misma
    * referencia en algunas ocasiones
    * */
    switch (Utils.getRandomNumberInRange(1, 7)) {
        case 1:
            /*
            El cuadrado (smashboy)

            **
            **
            */
            return new Tetromino([
                [new Point(0, 0), new Point(1, 0), new Point(0, 1), new Point(1, 1)]
            ]);
        case 2:

            /*
            La línea (hero)

            ****
            */
            return new Tetromino([
                [new Point(0, 0), new Point(1, 0), new Point(2, 0), new Point(3, 0)],
                [new Point(0, 0), new Point(0, 1), new Point(0, 2), new Point(0, 3)],
            ]);
        case 3:

            /*
            La L (orange ricky)
              *
            ***

            */

            return new Tetromino([
                [new Point(0, 1), new Point(1, 1), new Point(2, 1), new Point(2, 0)],
                [new Point(0, 0), new Point(0, 1), new Point(0, 2), new Point(1, 2)],
                [new Point(0, 0), new Point(0, 1), new Point(1, 0), new Point(2, 0)],
                [new Point(0, 0), new Point(1, 0), new Point(1, 1), new Point(1, 2)],
            ]);
        case 4:

            /*
            La J (blue ricky)
            *
            ***

            */

            return new Tetromino([
                [new Point(0, 0), new Point(0, 1), new Point(1, 1), new Point(2, 1)],
                [new Point(0, 0), new Point(1, 0), new Point(0, 1), new Point(0, 2)],
                [new Point(0, 0), new Point(1, 0), new Point(2, 0), new Point(2, 1)],
                [new Point(0, 2), new Point(1, 2), new Point(1, 1), new Point(1, 0)],
            ]);
        case 5:
            /*
           La Z (Cleveland Z)
           **
            **
           */

            return new Tetromino([
                [new Point(0, 0), new Point(1, 0), new Point(1, 1), new Point(2, 1)],
                [new Point(0, 1), new Point(1, 1), new Point(1, 0), new Point(0, 2)],
            ]);
        case 6:

            /*
           La otra Z (Rhode island Z)
            **
           **
           */
            return new Tetromino([
                [new Point(0, 1), new Point(1, 1), new Point(1, 0), new Point(2, 0)],
                [new Point(0, 0), new Point(0, 1), new Point(1, 1), new Point(1, 2)],
            ]);
        case 7:
        default:

            /*
           La T (Teewee)

            *
           ***
           */
            return new Tetromino([
                [new Point(0, 1), new Point(1, 1), new Point(1, 0), new Point(2, 1)],
                [new Point(0, 0), new Point(0, 1), new Point(0, 2), new Point(1, 1)],
                [new Point(0, 0), new Point(1, 0), new Point(2, 0), new Point(1, 1)],
                [new Point(0, 1), new Point(1, 0), new Point(1, 1), new Point(1, 2)],
            ]);
    }
}