var Line = require("./Line");
var vectorUtil = require("../../utils/vector_util");
var curveUtil = require("../../utils/curve_util");
var dataUtil = require("../../utils/data_structure_util");
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 _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); }
function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance"); }
function _iterableToArray(iter) { if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter); }
function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } }
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.BezierCurve
* BezierCurve.
*
*
* 贝塞尔曲线。
* @docauthor 大漠穷秋 <damoqiongqiu@126.com>
*/
var out = [];
function someVectorAt(shape, t, isTangent) {
var cpx2 = shape.cpx2;
var cpy2 = shape.cpy2;
if (cpx2 === null || cpy2 === null) {
return [(isTangent ? curveUtil.cubicDerivativeAt : curveUtil.cubicAt)(shape.x1, shape.cpx1, shape.cpx2, shape.x2, t), (isTangent ? curveUtil.cubicDerivativeAt : curveUtil.cubicAt)(shape.y1, shape.cpy1, shape.cpy2, shape.y2, t)];
} else {
return [(isTangent ? curveUtil.quadraticDerivativeAt : curveUtil.quadraticAt)(shape.x1, shape.cpx1, shape.x2, t), (isTangent ? curveUtil.quadraticDerivativeAt : curveUtil.quadraticAt)(shape.y1, shape.cpy1, shape.y2, t)];
}
}
var BezierCurve =
/*#__PURE__*/
function (_Line) {
_inherits(BezierCurve, _Line);
/**
* @method constructor BezierCurve
* @param {Object} options
*/
function BezierCurve(options) {
var _this;
_classCallCheck(this, BezierCurve);
_this = _possibleConstructorReturn(this, _getPrototypeOf(BezierCurve).call(this, dataUtil.merge({
shape: {
x1: 0,
y1: 0,
x2: 0,
y2: 0,
cpx1: 0,
cpy1: 0,
percent: 1
},
style: {
stroke: '#000',
fill: null
}
}, options, true)));
/**
* @property {String} type
*/
_this.type = 'bezier-curve';
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(BezierCurve, [{
key: "buildPath",
value: function buildPath(ctx, shape) {
var x1 = shape.x1;
var y1 = shape.y1;
var x2 = shape.x2;
var y2 = shape.y2;
var cpx1 = shape.cpx1;
var cpy1 = shape.cpy1;
var cpx2 = shape.cpx2;
var cpy2 = shape.cpy2;
var percent = shape.percent;
if (percent === 0) {
return;
}
ctx.moveTo(x1, y1);
if (cpx2 == null || cpy2 == null) {
if (percent < 1) {
curveUtil.quadraticSubdivide(x1, cpx1, x2, percent, out);
cpx1 = out[1];
x2 = out[2];
curveUtil.quadraticSubdivide(y1, cpy1, y2, percent, out);
cpy1 = out[1];
y2 = out[2];
}
ctx.quadraticCurveTo(cpx1, cpy1, x2, y2);
} else {
if (percent < 1) {
curveUtil.cubicSubdivide(x1, cpx1, cpx2, x2, percent, out);
cpx1 = out[1];
cpx2 = out[2];
x2 = out[3];
curveUtil.cubicSubdivide(y1, cpy1, cpy2, y2, percent, out);
cpy1 = out[1];
cpy2 = out[2];
y2 = out[3];
}
ctx.bezierCurveTo(cpx1, cpy1, cpx2, cpy2, x2, y2);
}
}
/**
* @method pointAt
* Get point at percent.
*
*
* 按照比例获取线条上的点。
* @param {Number} percent
* @return {Array<Number>}
*/
}, {
key: "pointAt",
value: function pointAt(t) {
return someVectorAt(this.shape, t, false);
}
}, {
key: "firstPoint",
value: function firstPoint() {
return this.pointAt(0);
}
}, {
key: "firstTwoPoints",
value: function firstTwoPoints() {
return [_toConsumableArray(this.pointAt(0)), _toConsumableArray(this.pointAt(0.2))];
}
}, {
key: "lastPoint",
value: function lastPoint() {
return this.pointAt(1);
}
}, {
key: "lastTwoPoints",
value: function lastTwoPoints() {
return [_toConsumableArray(this.pointAt(1)), _toConsumableArray(this.pointAt(0.8))];
}
/**
* Get tangent at percent
* @param {Number} t
* @return {Array<Number>}
*/
}, {
key: "tangentAt",
value: function tangentAt(t) {
var p = someVectorAt(this.shape, t, true);
return vectorUtil.normalize(p, p);
}
}]);
return BezierCurve;
}(Line);
module.exports = BezierCurve;