var dataUtil = require("../../utils/data_structure_util"); var Line = require("./Line"); var _constants = require("../../utils/constants"); var mathSin = _constants.mathSin; var mathCos = _constants.mathCos; function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; } function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); } function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; } function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); } function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); } function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); } /** * @class qrenderer.graphic.line.Trochold * Trochold. * * * 内外旋轮曲线。 * @docauthor 大漠穷秋 <damoqiongqiu@126.com> */ var Trochold = /*#__PURE__*/ function (_Line) { _inherits(Trochold, _Line); /** * @method constructor Trochold * @param {Object} options */ function Trochold(options) { var _this; _classCallCheck(this, Trochold); _this = _possibleConstructorReturn(this, _getPrototypeOf(Trochold).call(this, dataUtil.merge({ shape: { cx: 0, cy: 0, r: 0, r0: 0, d: 0, location: 'out' }, style: { stroke: '#000', fill: null } }, options, true))); /** * @property {String} type */ _this.type = 'trochoid'; return _this; } /** * @method buildPath * Build the path of current line, the data structure is like the path attribute in SVG. * * * 构建当前线条的路径,数据结构类似 SVG 中的 path 属性。 * @param {Object} ctx * @param {String} shape */ _createClass(Trochold, [{ key: "buildPath", value: function buildPath(ctx, shape) { var x1; var y1; var x2; var y2; var R = shape.r; var r = shape.r0; var d = shape.d; var offsetX = shape.cx; var offsetY = shape.cy; var delta = shape.location === 'out' ? 1 : -1; if (shape.location && R <= r) { return; } var num = 0; var i = 1; var theta; x1 = (R + delta * r) * mathCos(0) - delta * d * mathCos(0) + offsetX; y1 = (R + delta * r) * mathSin(0) - d * mathSin(0) + offsetY; ctx.moveTo(x1, y1); // 计算结束时的i do { num++; } while (r * num % (R + delta * r) !== 0); do { theta = Math.PI / 180 * i; x2 = (R + delta * r) * mathCos(theta) - delta * d * mathCos((R / r + delta) * theta) + offsetX; y2 = (R + delta * r) * mathSin(theta) - d * mathSin((R / r + delta) * theta) + offsetY; ctx.lineTo(x2, y2); i++; } while (i <= r * num / (R + delta * r) * 360); } }]); return Trochold; }(Line); module.exports = Trochold;