NAME
    Acme::Text::Rhombus - Draw a rhombus with letters/digits

SYNOPSIS
     use Acme::Text::Rhombus qw(rhombus);

     print rhombus(
         lines   =>       15,
         letter  =>      'c',
         case    =>  'upper',
         fillup  =>      '.',
         forward =>        1,
     );

     __OUTPUT__
     .......C.......
     ......DDD......
     .....EEEEE.....
     ....FFFFFFF....
     ...GGGGGGGGG...
     ..HHHHHHHHHHH..
     .IIIIIIIIIIIII.
     JJJJJJJJJJJJJJJ
     .KKKKKKKKKKKKK.
     ..LLLLLLLLLLL..
     ...MMMMMMMMM...
     ....NNNNNNN....
     .....OOOOO.....
     ......PPP......
     .......Q.......

FUNCTIONS
  rhombus, rhombus_letter
    Draws a rhombus with letters and returns it as a string.

    If no option value is supplied or if it is invalid, then a default will
    be silently assumed (omitting all options will return a rhombus of 25
    lines).

    Given that the specified number of lines is even, it will be incremented
    to satisfy the requirement of being an odd number.

    Options:

    *   "lines"

        Number of lines to be printed. Defaults to 25.

    *   "letter"

        Letter to start with. Defaults to "a".

    *   "case"

        Lower/upper case of the letters within the rhombus. Defaults to
        "upper".

    *   "fillup"

        The fillup character. Defaults to '.'.

    *   "forward"

        Forward letter enumeration. Defaults to boolean 1.

  rhombus_digit
    Draws a rhombus with digits and returns it as a string.

    If no option value is supplied or if it is invalid, then a default will
    be silently assumed (omitting all options will return a rhombus of 25
    lines).

    Given that the specified number of lines is even, it will be incremented
    to satisfy the requirement of being an odd number.

    Options:

    *   "lines"

        Number of lines to be printed. Defaults to 25.

    *   "digit"

        Digit to start with. Defaults to 0.

    *   "fillup"

        The fillup character. Defaults to '.'.

    *   "forward"

        Forward digit enumeration. Defaults to boolean 1.

  rhombus_random
    Draws a rhombus with random letters/digits and returns it as a string.

    If no option value is supplied or if it is invalid, then a default will
    be silently assumed (omitting all options will return a rhombus of 25
    lines).

    Given that the specified number of lines is even, it will be incremented
    to satisfy the requirement of being an odd number.

    Options:

    *   "lines"

        Number of lines to be printed. Defaults to 25.

    *   "fillup"

        The fillup character. Defaults to '.'.

EXPORT
  Functions
    "rhombus(), rhombus_letter(), rhombus_digit(), rhombus_random()" are
    exportable.

  Tags
    ":all - *()"

AUTHOR
    Steven Schubiger <schubiger@cpan.org>

LICENSE
    This program is free software; you may redistribute it and/or modify it
    under the same terms as Perl itself.

    See <http://dev.perl.org/licenses/>