(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "three"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("three"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.three);
    global.CSS3DRenderer = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _three) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.CSS3DSprite = _exports.CSS3DRenderer = _exports.CSS3DObject = 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, 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 _get() { if (typeof Reflect !== "undefined" && Reflect.get) { _get = Reflect.get; } else { _get = function _get(target, property, receiver) { var base = _superPropBase(target, property); if (!base) return; var desc = Object.getOwnPropertyDescriptor(base, property); if (desc.get) { return desc.get.call(arguments.length < 3 ? target : receiver); } return desc.value; }; } return _get.apply(this, arguments); }

  function _superPropBase(object, property) { while (!Object.prototype.hasOwnProperty.call(object, property)) { object = _getPrototypeOf(object); if (object === null) break; } return object; }

  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } Object.defineProperty(subClass, "prototype", { value: Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }), writable: false }); 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); }

  function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

  function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } 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 _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

  /**
   * Based on http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs
   */
  var _position = new _three.Vector3();

  var _quaternion = new _three.Quaternion();

  var _scale = new _three.Vector3();

  var CSS3DObject = /*#__PURE__*/function (_Object3D) {
    _inherits(CSS3DObject, _Object3D);

    var _super = _createSuper(CSS3DObject);

    function CSS3DObject() {
      var _this2;

      var element = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : document.createElement('div');

      _classCallCheck(this, CSS3DObject);

      _this2 = _super.call(this);
      _this2.element = element;
      _this2.element.style.position = 'absolute';
      _this2.element.style.pointerEvents = 'auto';
      _this2.element.style.userSelect = 'none';

      _this2.element.setAttribute('draggable', false);

      _this2.addEventListener('removed', function () {
        this.traverse(function (object) {
          if (object.element instanceof Element && object.element.parentNode !== null) {
            object.element.parentNode.removeChild(object.element);
          }
        });
      });

      return _this2;
    }

    _createClass(CSS3DObject, [{
      key: "copy",
      value: function copy(source, recursive) {
        _get(_getPrototypeOf(CSS3DObject.prototype), "copy", this).call(this, source, recursive);

        this.element = source.element.cloneNode(true);
        return this;
      }
    }]);

    return CSS3DObject;
  }(_three.Object3D);

  _exports.CSS3DObject = CSS3DObject;
  CSS3DObject.prototype.isCSS3DObject = true;

  var CSS3DSprite = /*#__PURE__*/function (_CSS3DObject) {
    _inherits(CSS3DSprite, _CSS3DObject);

    var _super2 = _createSuper(CSS3DSprite);

    function CSS3DSprite(element) {
      var _this3;

      _classCallCheck(this, CSS3DSprite);

      _this3 = _super2.call(this, element);
      _this3.rotation2D = 0;
      return _this3;
    }

    _createClass(CSS3DSprite, [{
      key: "copy",
      value: function copy(source, recursive) {
        _get(_getPrototypeOf(CSS3DSprite.prototype), "copy", this).call(this, source, recursive);

        this.rotation2D = source.rotation2D;
        return this;
      }
    }]);

    return CSS3DSprite;
  }(CSS3DObject);

  _exports.CSS3DSprite = CSS3DSprite;
  CSS3DSprite.prototype.isCSS3DSprite = true; //

  var _matrix = new _three.Matrix4();

  var _matrix2 = new _three.Matrix4();

  var CSS3DRenderer = /*#__PURE__*/_createClass(function CSS3DRenderer() {
    var parameters = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

    _classCallCheck(this, CSS3DRenderer);

    var _this = this;

    var _width, _height;

    var _widthHalf, _heightHalf;

    var cache = {
      camera: {
        fov: 0,
        style: ''
      },
      objects: new WeakMap()
    };
    var domElement = parameters.element !== undefined ? parameters.element : document.createElement('div');
    domElement.style.overflow = 'hidden';
    this.domElement = domElement;
    var cameraElement = document.createElement('div');
    cameraElement.style.transformStyle = 'preserve-3d';
    cameraElement.style.pointerEvents = 'none';
    domElement.appendChild(cameraElement);

    this.getSize = function () {
      return {
        width: _width,
        height: _height
      };
    };

    this.render = function (scene, camera) {
      var fov = camera.projectionMatrix.elements[5] * _heightHalf;

      if (cache.camera.fov !== fov) {
        domElement.style.perspective = camera.isPerspectiveCamera ? fov + 'px' : '';
        cache.camera.fov = fov;
      }

      if (scene.autoUpdate === true) scene.updateMatrixWorld();
      if (camera.parent === null) camera.updateMatrixWorld();
      var tx, ty;

      if (camera.isOrthographicCamera) {
        tx = -(camera.right + camera.left) / 2;
        ty = (camera.top + camera.bottom) / 2;
      }

      var cameraCSSMatrix = camera.isOrthographicCamera ? 'scale(' + fov + ')' + 'translate(' + epsilon(tx) + 'px,' + epsilon(ty) + 'px)' + getCameraCSSMatrix(camera.matrixWorldInverse) : 'translateZ(' + fov + 'px)' + getCameraCSSMatrix(camera.matrixWorldInverse);
      var style = cameraCSSMatrix + 'translate(' + _widthHalf + 'px,' + _heightHalf + 'px)';

      if (cache.camera.style !== style) {
        cameraElement.style.transform = style;
        cache.camera.style = style;
      }

      renderObject(scene, scene, camera, cameraCSSMatrix);
    };

    this.setSize = function (width, height) {
      _width = width;
      _height = height;
      _widthHalf = _width / 2;
      _heightHalf = _height / 2;
      domElement.style.width = width + 'px';
      domElement.style.height = height + 'px';
      cameraElement.style.width = width + 'px';
      cameraElement.style.height = height + 'px';
    };

    function epsilon(value) {
      return Math.abs(value) < 1e-10 ? 0 : value;
    }

    function getCameraCSSMatrix(matrix) {
      var elements = matrix.elements;
      return 'matrix3d(' + epsilon(elements[0]) + ',' + epsilon(-elements[1]) + ',' + epsilon(elements[2]) + ',' + epsilon(elements[3]) + ',' + epsilon(elements[4]) + ',' + epsilon(-elements[5]) + ',' + epsilon(elements[6]) + ',' + epsilon(elements[7]) + ',' + epsilon(elements[8]) + ',' + epsilon(-elements[9]) + ',' + epsilon(elements[10]) + ',' + epsilon(elements[11]) + ',' + epsilon(elements[12]) + ',' + epsilon(-elements[13]) + ',' + epsilon(elements[14]) + ',' + epsilon(elements[15]) + ')';
    }

    function getObjectCSSMatrix(matrix) {
      var elements = matrix.elements;
      var matrix3d = 'matrix3d(' + epsilon(elements[0]) + ',' + epsilon(elements[1]) + ',' + epsilon(elements[2]) + ',' + epsilon(elements[3]) + ',' + epsilon(-elements[4]) + ',' + epsilon(-elements[5]) + ',' + epsilon(-elements[6]) + ',' + epsilon(-elements[7]) + ',' + epsilon(elements[8]) + ',' + epsilon(elements[9]) + ',' + epsilon(elements[10]) + ',' + epsilon(elements[11]) + ',' + epsilon(elements[12]) + ',' + epsilon(elements[13]) + ',' + epsilon(elements[14]) + ',' + epsilon(elements[15]) + ')';
      return 'translate(-50%,-50%)' + matrix3d;
    }

    function renderObject(object, scene, camera, cameraCSSMatrix) {
      if (object.isCSS3DObject) {
        object.onBeforeRender(_this, scene, camera);
        var style;

        if (object.isCSS3DSprite) {
          // http://swiftcoder.wordpress.com/2008/11/25/constructing-a-billboard-matrix/
          _matrix.copy(camera.matrixWorldInverse);

          _matrix.transpose();

          if (object.rotation2D !== 0) _matrix.multiply(_matrix2.makeRotationZ(object.rotation2D));
          object.matrixWorld.decompose(_position, _quaternion, _scale);

          _matrix.setPosition(_position);

          _matrix.scale(_scale);

          _matrix.elements[3] = 0;
          _matrix.elements[7] = 0;
          _matrix.elements[11] = 0;
          _matrix.elements[15] = 1;
          style = getObjectCSSMatrix(_matrix);
        } else {
          style = getObjectCSSMatrix(object.matrixWorld);
        }

        var element = object.element;
        var cachedObject = cache.objects.get(object);

        if (cachedObject === undefined || cachedObject.style !== style) {
          element.style.transform = style;
          var objectData = {
            style: style
          };
          cache.objects.set(object, objectData);
        }

        element.style.display = object.visible ? '' : 'none';

        if (element.parentNode !== cameraElement) {
          cameraElement.appendChild(element);
        }

        object.onAfterRender(_this, scene, camera);
      }

      for (var i = 0, l = object.children.length; i < l; i++) {
        renderObject(object.children[i], scene, camera, cameraCSSMatrix);
      }
    }
  });

  _exports.CSS3DRenderer = CSS3DRenderer;
});