paths-js/sector.js

Paths.js ========

'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } }

var _path = require('./path');

var _path2 = _interopRequireDefault(_path);

var _ops = require('./ops');

exports['default'] = function (_ref) {
  var _Path$moveto$arc$lineto, _Path$moveto$arc, _Path$moveto, _Path;

  var center = _ref.center;
  var r = _ref.r;
  var R = _ref.R;
  var start = _ref.start;
  var end = _ref.end;

  var epsilon = 10e-5;
  if (Math.abs(end - 2 * Math.PI) < epsilon) {
    end = 2 * Math.PI - epsilon;
  }

  var a = (0, _ops.plus)(center, (0, _ops.onCircle)(R, start));
  var b = (0, _ops.plus)(center, (0, _ops.onCircle)(R, end));
  var c = (0, _ops.plus)(center, (0, _ops.onCircle)(r, end));
  var d = (0, _ops.plus)(center, (0, _ops.onCircle)(r, start));

  var large = end - start > Math.PI ? 1 : 0;

  var path = (_Path$moveto$arc$lineto = (_Path$moveto$arc = (_Path$moveto = (_Path = (0, _path2['default'])()).moveto.apply(_Path, _toConsumableArray(a))).arc.apply(_Path$moveto, [R, R, 0, large, 1].concat(_toConsumableArray(b)))).lineto.apply(_Path$moveto$arc, _toConsumableArray(c))).arc.apply(_Path$moveto$arc$lineto, [r, r, 0, large, 0].concat(_toConsumableArray(d))).closepath();

  var midAngle = (start + end) / 2;
  var midRadius = (r + R) / 2;
  var centroid = (0, _ops.plus)(center, (0, _ops.onCircle)(midRadius, midAngle));

  return {
    path: path,
    centroid: centroid
  };
};

module.exports = exports['default'];