SVGoban

A lightweight JavaScript library that generates a Goban representation as layered sets of SVG shapes

Project Guidelines

• Pure functions (no state, no side-effects)
• Scalable to any size without quality loss (SVG!)
• No dependencies
• Any goban size
• CSS styling
• Default themes with plain colors and very light gradients

Demo

Generate a SVG sample output from this repository: node demo/test_19classic_4stones.js > sample.svg

Installation

SVGoban may be installed as a NPM package: npm install svgoban --save

API

"Pseudo-" elements are regular objects with a type attribute matching the target SVG element and other related attributes.

Attributes

• size = a number between 9 and 19
• color = "black" or "white"
• position = an object containing coordinates and colors as keys and values
• config = an object containing size and theme attributes
• noMargin and hideMargin = booleans
• coordSystem = "A1" or "aa"
• zoom = an object describing either:
  • [mode = "zone"] a region ("NW"/"NE"/"SE"/"SW")
  • [mode = "point"] or a center point and a zoom ratio

Geometry

• shapeBackground(noMargin) returns 1 pseudo-square whose area may include the margin
• shapeGrid(size) returns an array of 2*size pseudo-lines
• shapeStarPoints(size) returns an array of pseudo-circles
• shapeLabels(size, coordSystem) returns an array of 4*size pseudo-text
• shapeStones(size, positions) returns an array of size*size pseudo-circles (stones and placeholders)
• shapeStone(size, intersection, color) returns 1 pseudo-circle
• shapeMarkers(size, markers, positions) returns an array of pseudo-elements drawing triangles, squares,...
• shapeArea(hideMargin, zoom, size) returns a view box with optional margin and zoom in

Styles

• defineRadialColors(color) returns gradient colors
• Themes is an array of predefined themes: "classic" and "paper"

Helper

• serialize(config, position, markers) returns a string containing a full SVG goban