var dataUtil = require("../../utils/data_structure_util");
var _constants = require("../../utils/constants");
var mathSin = _constants.mathSin;
var mathCos = _constants.mathCos;
var PI = _constants.PI;
var Shape = require("./Shape");
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.shape.Star
* n角星(n>3)
* @docauthor 大漠穷秋 <damoqiongqiu@126.com>
*/
var Star =
/*#__PURE__*/
function (_Shape) {
_inherits(Star, _Shape);
/**
* @method constructor Star
* @param {Object} options
*/
function Star(options) {
var _this;
_classCallCheck(this, Star);
_this = _possibleConstructorReturn(this, _getPrototypeOf(Star).call(this, dataUtil.merge({
shape: {
cx: 0,
cy: 0,
n: 3,
r0: null,
r: 0
}
}, options, true)));
/**
* @property {String} type
*/
_this.type = 'star';
return _this;
}
/**
* @method buildPath
* 绘制元素路径
* @param {Object} ctx
* @param {String} shape
*/
_createClass(Star, [{
key: "buildPath",
value: function buildPath(ctx, shape) {
var n = shape.n;
if (!n || n < 2) {
return;
}
var x = shape.cx;
var y = shape.cy;
var r = shape.r;
var r0 = shape.r0; // 如果未指定内部顶点外接圆半径,则自动计算
if (r0 == null) {
r0 = n > 4 // 相隔的外部顶点的连线的交点,
// 被取为内部交点,以此计算r0
? r * mathCos(2 * PI / n) / mathCos(PI / n) // 二三四角星的特殊处理
: r / 3;
}
var dStep = PI / n;
var deg = -PI / 2;
var xStart = x + r * mathCos(deg);
var yStart = y + r * mathSin(deg);
deg += dStep; // 记录边界点,用于判断inside
ctx.moveTo(xStart, yStart);
for (var i = 0, end = n * 2 - 1, ri; i < end; i++) {
ri = i % 2 === 0 ? r0 : r;
ctx.lineTo(x + ri * mathCos(deg), y + ri * mathSin(deg));
deg += dStep;
}
ctx.closePath();
}
}]);
return Star;
}(Shape);
module.exports = Star;