Server-side code for tabletop game automation service.
v8.go requires special installation to get/build v8 code. Run go get -d github.com/swwu/v8.go" to download the packages. Then cd to
$GOPATH/src/github.com/idada/v8.go and run ./install.sh. This may require
installing other dependencies:
sudo apt-get install subversion libc6-dev g++-multilib
May also need to force v8 to build in ia32 mode - this can be done by
modifying install.sh to run make ia32.release instead of make native, and
changing all references to out/native to out/ia32.release.
The basic character-sheet evaluation consists of five primitives. These are entities, effects, rules, variables, and reductions.
An entity is a data structure which represents the character sheet and its underlying character. An entity stores, as its state, all active effects, and some data variables representing base stats.
The entity will evaluate the union of the rules attached to all its effects when asked to generate its instantaneous state.
An effect represents a grouping of rules that form a coherent mechanic.
Rules represent a grouping of variable declarations and reductions.
A reduction represents a complete bipartite dependency subgraph between variables, which modifies the value of some set of variables based on the values of some set of dependencies.
Reductions are evaluated in dependency ordering, meaning that a reduction which depends on a variable will always be evaluated after all reductions which modify that variable.
A variable represents a single value. There are two types of variables - data variables and reducer variables.
A data variable is simply a fixed value which is provided via user input (e.g. base stats).
A reducer variable is a variable which contains a well-defined set of operations which can be called, and which reduces those operations in a deterministic order regardless of the order they are called in.