Ruby Quiz 49

Here is my solution to Ruby Quiz 49: Lisp Game. It consists of two parts: the game engine and a game description. I’ve called it “RADS” in homage to the TADS interactive fiction engine. In the quiz description, James mentioned that you could take at least two approaches: mimic the Lisp or do it the “Ruby way”. I’ve attempted to do the latter.

• rads.rb the engine
• game.rb the game description and custom verbs

To run this game, download both files and execute game.rb.

Features

Game engine

• Accepts inventory or i

• Accepts look or l, also accepts “look at x”

• Accepts examine or x, which prints a long description

• “it” represents the last-examined, taken, or dropped object. You can take it, examine it, look at it

• Short direction names (n, s, e, w, u, d)

• Accepts walk or go

• Short direction names are also verbs so you can just type “w” to go west

Altername names for things (“whiskey bottle”, “bottle”, “whiskey”)

• Decorations, which are objects that can’t be taken. Try “x wizard” or “look at couch”.

• A decoration without a short_desc won’t be output as part of the room’s description. You can examine the couch, but it won’t be described separately because it’s already part of the wizard’s long description.

• Game-specific verbs are defined in the game file, not in the engine

• Any object with no “names” array defined in the initialization proc will have one created for it containing the short_desc

• Containment (things within other things) is implemented and contents of containers like the bucket will be printed, but “put in”/”take out” is not yet implemented.

To do:

• Fix the fact that you can’t examine the door in the garden

• Implement “put in”/”take out”.

• Write a “put x in y” verb

• Understand prepositions. In addition to “splash bucket [on] wizard” and “dunk bucket [in] well”, I’d like to allow “splash wizard with bucket”.</p>

Game file

• Game-specific verbs are defined here, not as part of the RADS library

• The dunk, weld, and splash verbs take (but ignore) prepositions. Try “splash bucket on wizard” or “splash bucket wizard”.

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