forgeplus-react/node_modules/@antv/component/lib/axis/helix.js

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var Util = require('../util');

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

var MatrixUtil = Util.MatrixUtil,
    PathUtil = Util.PathUtil;
var vec2 = MatrixUtil.vec2;

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

  function Helix() {
    return _Base.apply(this, arguments) || this;
  }

  var _proto = Helix.prototype;

  _proto.getDefaultCfg = function getDefaultCfg() {
    var cfg = _Base.prototype.getDefaultCfg.call(this);

    return Util.mix({}, cfg, {
      inner: 0,
      type: 'helix',
      line: {
        // @type {Attrs} 坐标轴线的图形属性,如果设置成null，则不显示轴线
        lineWidth: 1,
        stroke: '#C0D0E0'
      },
      tickLine: {
        // @type {Attrs} 标注坐标线的图形属性
        lineWidth: 1,
        stroke: '#C0D0E0',
        length: 5
      },
      startAngle: 1.25 * Math.PI,
      endAngle: 7.25 * Math.PI,
      // 螺旋系数
      a: 0,
      // 画布中心坐标
      center: null,
      // 坐标轴绘制起点
      axisStart: null,
      // 坐标轴的n个坐标点
      crp: []
    });
  };

  _proto.getLinePath = function getLinePath() {
    var self = this;
    var crp = self.get('crp');
    var axisStart = self.get('axisStart');
    var path = PathUtil.catmullRomToBezier(crp);
    path.unshift(['M', axisStart.x, axisStart.y]);
    return path;
  };

  _proto.getTickPoint = function getTickPoint(value) {
    var self = this;
    var startAngle = self.get('startAngle');
    var endAngle = self.get('endAngle');
    var angle = startAngle + (endAngle - startAngle) * value;
    return self._getHelixPoint(angle);
  };

  _proto._getHelixPoint = function _getHelixPoint(angle) {
    var self = this;
    var center = self.get('center');
    var a = self.get('a'); // 螺线系数

    var radius = a * angle + self.get('inner'); // 螺线方程

    return {
      x: center.x + Math.cos(angle) * radius,
      y: center.y + Math.sin(angle) * radius
    };
  };

  _proto.getSideVector = function getSideVector(offset, point) {
    var self = this;
    var center = self.get('center');
    var vector = [point.x - center.x, point.y - center.y];

    if (offset) {
      var vecLen = vec2.length(vector);
      vec2.scale(vector, vector, offset / vecLen);
    }

    return vector;
  };

  _proto.getSidePoint = function getSidePoint(point, offset) {
    var self = this;
    var vector = self.getSideVector(offset, point);
    return {
      x: point.x + vector[0],
      y: point.y + vector[1]
    };
  };

  _proto.getTickEnd = function getTickEnd(start, length) {
    var self = this;
    var tickLine = self.get('tickLine');
    length = length ? length : tickLine.length;
    return self.getSidePoint(start, length);
  };

  return Helix;
}(Base);

module.exports = Helix;