David Cantrell > Games-Dice-Advanced > Games::Dice::Advanced



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Games::Dice::Advanced - simulate dice rolls, including weird and loaded dice


    print Games::Dice::Advanced->roll();     # roll a six-sided die
    print Games::Dice::Advanced->roll('d4'); # roll a four-sided die

    # roll a four-sided die and a 6-sided die and return the total
    $die1 = Games::Dice::Advanced->new('d4');
    $die2 = Games::Dice::Advanced->new('d6');
    print Games::Dice::Advanced->roll($die1, $die2);

    print $die1->roll();                 # roll the d4 we created above

    # roll 2 four-sided dice and a 6-sided die and return the total
    print Games::Dice::Advanced->roll('2d4', 'd6');

    # create a four-sided die with the squares of 1, 2, 3 and 4
    Games::Dice::Advanced->new(sub { int(1+rand(4)) ** 2 });



Roll one or more dice. If called as a class method, it first calls appropriate constructors and creates objects before calling those objects' roll() methods. When called on an object it simply rolls the die.

When called as a class method, it takes a list of arguments defining a 'recipe' to roll. These are added together to produce a result. Each item in the recipe must be a valid argument to the constructor (see the description of the 'new' method below). If no argument is given to a class method, we assume a six-sided die - 'd6'. You will note that the multiplier constructor is not available when roll is called in this way.

When called as an object method, no arguments are permitted.


This method defines a die. You may call it yourself to create a die for later rolling, or it may be called by the roll() method. It takes zero, one or two arguments. If no argument is given, we silently assume that the user wants to create a six-sided die, a 'd6'. Valid arguments are:

integer constant, eg '5'

Creates a die that always returns that constant

dN, where N is integer, eg 'd10'

Creates a die that returns a random integer from 1 to N with results spread evenly across the range.

NdM, where N and M are integer, eg '2d10'

Creates a die dM as above which is rolled N times to generate a result. Note that the N is *not* just a multiplier.

N and any other valid argument, where N is a number, eg (2, 'd4')

Note that the two arguments may be in any order. Creates a die as specified, and multiplies the results by N when it is rolled. Compare with NdM above.

Leading and trailing whitespace is stripped, no other whitespace is allowed in any of the above.


A reference to a subroutine, which is to be called whenever we need to generate a result. It should take no parameters.


Use this to easily specify truly weird dice. NOT YET IMPLEMENTED, so use a SUBREF for the moment.


For random, read 'pseudo-random'. Patches to work with sources of true randomness are welcome.

Doesn't support dice with fractional or complex numbers of sides :-)


I welcome feedback about my code, including constructive criticism. And, while this is free software (both free-as-in-beer and free-as-in-speech) I also welcome payment. In particular, your bug reports will get moved to the front of the queue if you buy me something from my wishlist, which can be found at http://www.cantrell.org.uk/david/shopping-list/wishlist.


David Cantrell <david@cantrell.org.uk>


Copyright 2003 David Cantrell

This module is free-as-in-speech software, and may be used, distributed, and modified under the same terms as Perl itself.

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