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This document is a brief description of the ALCHEMY hack. |
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Introduction - |
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As always, the general intention is to enhance the enjoyability and |
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playability of CF. In this code, I have created a system whereby |
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players may assemble various ingredients to make artifacts. |
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The amount of work I put into this was substantial; other than |
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new code -- I created new archetypes, revised archetypes, altered the |
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treasures file and created 2 new object types and a flag. |
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It therefore may be enjoyable to install this patch (incl code) |
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and *not* define ALCHEMY in define.h. In particular, this patch |
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does the following things: |
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1) more varieties of potions are available in shops. |
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2) new gems and types of food. |
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3) monsters will now leave behind body parts when you kill them. |
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4) if ALCHEMY is defined players may make potions/artifacts. |
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I have included instructions for installation, an install script |
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and a brief document for using the code (pretty simple). |
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Finally, as always, feedback is appreciated. |
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b.t. |
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thomas@astro.psu.edu |
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Instructions to Players - how to use this code. |
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Using the alchemy code (to make artifacts) is easy. You need |
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the following things: 1) be able to cast alchemy spell, 2) |
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have access to a cauldron and 3) have the right ingredients. |
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To create an artifact, put ingredients in the cauldron, then |
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cast 'alchemy' spell. You might make something :) Backfire |
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effects are possible. In order to get better at making stuff, |
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you will need to learn the alchemy skill. Books found in shops |
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(and elsewhere) will give you formulae for making stuff. |
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Of course , you can always 'experiment' on your own, but this |
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may be dangerous. |
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Description of code - |
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The bulk fo the alchemy code resides in 2 files - recipe.c |
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and alchemy.c. The basic features of the code are: |
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1- allow players to make artifacts from formulae. As players |
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gain xp and levels, their ability to create stuff improves |
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2- fast lookup of formulae. Lookup is randomized so that the |
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list is attempted for a match based on # levels the player |
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has. Obviously, higher level players get more attempts |
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to match the list--and thereby have a grater chance of |
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successfully completing a formula. |
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3- There are ~80 formulae in this version. You can dump |
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the formulalists using the crossfire -m7 option. |
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Basically, a simple linked list, ordered by the |
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number of different archs in a formulae, is used to |
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lookup 'recipe' matches. An indexed value for each formulae |
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allows a quick comparison for a match with the cauldron |
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contents. When a player casts alchemy on a cauldron, we |
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first determine # archs inside the cauldron, pick the |
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correct formulalist, randomly match against that list to |
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see if we got a match. If matched, we remove the ingredients, |
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and insert the artifact into the cauldron. Exp is awarded |
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to the players alchemy skill (if they have it). |
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