svg-patterns/p/hexagons.js

SVG patterns for Data Visualization.

'use strict';

var dom = require('virtual-dom/h');

var _require = require('../helpers'),
    M = _require.M,
    l = _require.l,
    pattern = _require.pattern; // credit to @riccardoscalco!
// taken from https://github.com/riccardoscalco/textures/blob/ca09566cb9e2dd0bf572639a7e17a9a96717c5e1/textures.coffee#L307


var tile = function tile(s) {
  var x = s * Math.tan(Math.PI / 6) * .5;
  var e = s * .5 / Math.cos(Math.PI / 6);
  return M(0, s / 2) + l(x, s / 2) + l(e, 0) + l(x, -s / 2) + l(-x, -s / 2) + l(-e, 0) + l(-x, s / 2) + 'Z' + M(x + e + x, s / 2) + l(e, 0);
};

var ratio = +(Math.tan(Math.PI / 6) + 1 / Math.cos(Math.PI / 6)).toFixed(3);
var defaults = {
  size: 10,
  // size of the pattern
  fill: 'none',
  // any SVG-compatible color
  strokeWidth: 1,
  stroke: '#343434',
  // any SVG-compatible color
  background: null // any SVG-compatible color

};

var hexagons = function hexagons() {
  var opt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  opt = Object.assign({}, defaults, opt);
  Object.assign(opt, {
    width: opt.size * ratio,
    height: opt.size,
    bg: opt.background,
    children: [dom('path', {
      d: tile(opt.size),
      fill: opt.fill,
      stroke: opt.stroke,
      'stroke-width': opt.strokeWidth + '',
      'stroke-linecap': 'square'
    })]
  });
  return pattern(opt);
};

module.exports = hexagons;