"use strict";

function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;
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, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
var _Cesium = Cesium,
  Matrix4 = _Cesium.Matrix4,
  HeadingPitchRange = _Cesium.HeadingPitchRange,
  Math = _Cesium.Math;
;
var AroundPoint = /*#__PURE__*/function () {
  function AroundPoint(_ref) {
    var viewer = _ref.viewer,
      amount = _ref.amount,
      position = _ref.position;
    _classCallCheck(this, AroundPoint);
    this._viewer = viewer;
    this._amount = amount;
    this._position = position;
  }
  _createClass(AroundPoint, [{
    key: "_bindEvent",
    value: function _bindEvent() {
      this._viewer.clock.onTick.addEventListener(this._aroundPoint, this);
    }
  }, {
    key: "_unbindEvent",
    value: function _unbindEvent() {
      this._viewer.camera.lookAtTransform(Matrix4.IDENTITY);
      this._viewer.clock.onTick.removeEventListener(this._aroundPoint, this);
    }
  }, {
    key: "start",
    value: function start() {
      this._viewer.clock.shouldAnimate = true;
      this._unbindEvent();
      this._bindEvent();
      return this;
    }
  }, {
    key: "stop",
    value: function stop() {
      this._unbindEvent();
      return this;
    }

    // 相机绕点旋转函数
  }, {
    key: "_aroundPoint",
    value: function _aroundPoint() {
      var heading = this._viewer.camera.heading;
      var pitch = this._viewer.camera.pitch;
      heading += Math.toRadians(this._amount);
      if (heading >= Math.PI * 2 || heading <= -Math.PI * 2) {
        heading = 0;
      }
      this._viewer.camera.lookAt(this._position, new HeadingPitchRange(heading, pitch, 5000.0));
    }
  }]);
  return AroundPoint;
}();
exports["default"] = AroundPoint;
//# sourceMappingURL=AroundPoint.js.map
