NuclearDispersionSystem/ant-design-vue-jeecg/node_modules/@antv/coord/lib/helix.js

"use strict";

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/**
 * @fileOverview the class of Helix Coordinate
 * @author sima.zhang
 */
var MatrixUtil = require('@antv/util/lib/matrix/');

var isNumberEqual = require('@antv/util/lib/math/is-number-equal');

var mix = require('@antv/util/lib/mix');

var Base = require('./base');

var vec2 = MatrixUtil.vec2;

var Helix =
/*#__PURE__*/
function (_Base) {
  _inherits(Helix, _Base);

  _createClass(Helix, [{
    key: "getDefaultCfg",
    value: function getDefaultCfg() {
      var cfg = _get(_getPrototypeOf(Helix.prototype), "getDefaultCfg", this).call(this);

      return mix({}, cfg, {
        startAngle: 1.25 * Math.PI,
        endAngle: 7.25 * Math.PI,
        innerRadius: 0,
        type: 'helix',
        isHelix: true
      });
    }
  }]);

  function Helix(cfg) {
    var _this;

    _classCallCheck(this, Helix);

    _this = _possibleConstructorReturn(this, _getPrototypeOf(Helix).call(this, cfg));

    _this._init();

    return _this;
  }

  _createClass(Helix, [{
    key: "_init",
    value: function _init() {
      var width = this.width;
      var height = this.height;
      var radius = this.radius;
      var innerRadius = this.innerRadius;
      var startAngle = this.startAngle;
      var endAngle = this.endAngle;
      var index = (endAngle - startAngle) / (2 * Math.PI) + 1; // 螺线圈数

      var maxRadius = Math.min(width, height) / 2;

      if (radius && radius >= 0 && radius <= 1) {
        maxRadius = maxRadius * radius;
      }

      var d = Math.floor(maxRadius * (1 - innerRadius) / index);
      var a = d / (Math.PI * 2); // 螺线系数

      var x = {
        start: startAngle,
        end: endAngle
      };
      var y = {
        start: innerRadius * maxRadius,
        end: innerRadius * maxRadius + d * 0.99
      };
      this.a = a;
      this.d = d;
      this.x = x;
      this.y = y;
    }
  }, {
    key: "getCenter",
    value: function getCenter() {
      return this.center;
    }
    /**
     * 将百分比数据变成屏幕坐标
     * @param  {Object} point 归一化的点坐标
     * @return {Object}       返回对应的屏幕坐标
     */

  }, {
    key: "convertPoint",
    value: function convertPoint(point) {
      var a = this.a;
      var center = this.center;
      var x;
      var y;

      if (this.isTransposed) {
        x = point.y;
        y = point.x;
      } else {
        x = point.x;
        y = point.y;
      }

      var thi = this.convertDim(x, 'x');
      var r = a * thi;
      var newY = this.convertDim(y, 'y');
      return {
        x: center.x + Math.cos(thi) * (r + newY),
        y: center.y + Math.sin(thi) * (r + newY)
      };
    }
    /**
     * 将屏幕坐标点还原成百分比数据
     * @param  {Object} point 屏幕坐标
     * @return {Object}       返回对应的归一化后的数据
     */

  }, {
    key: "invertPoint",
    value: function invertPoint(point) {
      var center = this.center;
      var a = this.a;
      var d = this.d + this.y.start;
      var v = vec2.subtract([], [point.x, point.y], [center.x, center.y]);
      var thi = vec2.angleTo(v, [1, 0], true);
      var rMin = thi * a; // 坐标与原点的连线在第一圈上的交点，最小r值

      if (vec2.length(v) < rMin) {
        // 坐标与原点的连线不可能小于最小r值，但不排除因小数计算产生的略小于rMin的情况
        rMin = vec2.length(v);
      }

      var index = Math.floor((vec2.length(v) - rMin) / d); // 当前点位于第index圈

      thi = 2 * index * Math.PI + thi;
      var r = a * thi;
      var newY = vec2.length(v) - r;
      newY = isNumberEqual(newY, 0) ? 0 : newY;
      var x = this.invertDim(thi, 'x');
      var y = this.invertDim(newY, 'y');
      x = isNumberEqual(x, 0) ? 0 : x;
      y = isNumberEqual(y, 0) ? 0 : y;
      var rst = {};
      rst.x = this.isTransposed ? y : x;
      rst.y = this.isTransposed ? x : y;
      return rst;
    }
  }]);

  return Helix;
}(Base);

module.exports = Helix;
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