_A Change in the Weather_
Special source-code edition (released June 2014)
Copyright 1995-1996 Andrew Plotkin <erkyrath@eblong.com>
http://www.eblong.com/zarf/if.html

This source code is provided for personal, educational use only. The
story and text of _A Change in the Weather_ belong to me; you may not
use them or create derivative works which contain them. However, you
have permission to use the programming techniques of this game in your
own works, and you may use the source code excluding game text.

If you want to *play* _ACITW_, you're in the wrong place. Go to my web
site, or the IF Archive, and download the compiled game file.
(http://www.eblong.com/zarf/ftp/weather.z5)

* Obvious Warning

This code contains spoilers! If you haven't played _ACITW_, and you
read this code, you'll certainly ruin the game for yourself. Play it
first. I am releasing this code for the benefit of Inform programmers
who are familiar with _ACITW_ and want to know how I did it.

* About The Source

This code is exactly the version I used to build _ACITW_ release 6,
except for a couple of changes to help it compile under the later
(v1502) I5 release.

- I added "@" signs to a couple of Z-machine assembly opcodes.

- I made the VerbLib declaration of "task_scores" unconditional.
  (The game famously does not use the "SCORE" command, but the
  library's handling of this global is a problem under the later
  I5 compiler.)

- I also renamed the library files to fit with Unix build conventions;
  on the old Mac setup, they didn't have ".h" suffixes.

I have not added explanatory comments to the source; you're on your
own for this safari.

weather.inf is the top-level source file.

The package includes a modified version of the Inform 5/8 library.
(The source files are mixed in with the game source; sorry about
that.) _ACITW_ must be built with this version. A couple of
modifications are tagged with "--Z" comments, but I don't have a
record of all the changes I made.

* To Compile

The game was developed with Inform 5, release v1405. It cannot be
compiled with Inform 6. (See notes above about the differences between
v1405 and v1502.)

The compile command:

inform5 weather.inf weather.z5