Simple static heuristics for estimating influence maps on Go positions.
Use npm to install:
$ npm install @sabaki/influence
Then require it as follows:
const influence = require('@sabaki/influence');The board arrangement is represented by an array of arrays. Each of those subarrays represent one row, all containing the same number of integers. -1 denotes a white stone, 1 a black stone, and 0 represents an empty vertex
[[ 0, 0, 1, 0, -1, -1, 1, 0, 0],
[ 1, 0, 1, -1, -1, 1, 1, 1, 0],
[ 0, 0, 1, -1, 0, 1, -1, -1, 0],
[ 1, 1, 1, -1, -1, -1, 1, -1, 0],
[ 1, -1, 1, 1, -1, 1, 1, 1, 0],
[-1, -1, -1, -1, -1, 1, 0, 0, 0],
[ 0, -1, -1, 0, -1, 1, 1, 1, 1],
[ 0, 0, 0, 0, 0, -1, -1, -1, 1],
[ 0, 0, 0, 0, 0, 0, 0, -1, 0]]data- Board dataoptions<Object>(optional)-
discrete<Boolean>(optional) - Default:false -
maxDistance<Number>(optional) - Default:6Only assigns a non-zero number to a vertex if its Manhattan distance to a stone of corresponding color is less or equal to
maxDistance. -
minRadiance<Number>(optional) - Default:2Only assigns a non-zero number to a vertex if the vertex has radiance in its corresponding color greater or equal to
minRadiance.
-
Returns an array of arrays of the same size as data. Each entry is a number between -1 and 1 inclusive. A negative number corresponds to white influence whereas a positive number denotes black influence.
This map does not take dead stones into account, i.e. it will assume all stones specified in data are alive. To get better results, remove dead stones first, either manually or with the deadstones module.
If discrete is set to true, the map will only contain -1, 0, or 1 as values.
data- Board data
Returns an array of arrays of the same size as data. Each entry is either -1, 0, or 1, corresponding to white area, neutral area, and black area.
data- Board datasign-1|1
Returns an array of arrays of the same size as data. Each entry is an non-negative integer which denotes the Manhattan distance to the nearest stone with the color given by sign. -1 denotes white and 1 corresponds to black.
data- Board datasign-1|1options<Object>(optional)p1<Number>(optional) - Default:6p2<Number>(optional) - Default:1.5p3<Number>(optional) - Default:2
Returns an array of arrays of the same size as data. Each entry is a non-negative number which encodes how many stones of the color corresponding to sign is in its vicinity. -1 corresponds to white stones whereas 1 denotes black stones. Each chain of the color corresponding to sign emits radiance which diminishes over distance, adds up with the radiance of other chains, and reflects at the board edge.
p1, p2, and p3 are parameters, controlling how strong the radiance is initially and how it diminishes.
Make sure you have Node.js v12 and npm installed. First, clone this repository via Git, then install all dependencies with npm:
$ git clone https://github.com/SabakiHQ/influence
$ cd influence
$ npm install
Use the build-demo script to build the demo project:
$ npm run build-demo
You can use the watch-demo command for development:
$ npm run watch-demo
Open demo/index.html in your browser to run demo.
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