(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.PeppersGhostEffect = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _three) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.PeppersGhostEffect = void 0;

  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 _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

  /**
   * peppers ghost effect based on http://www.instructables.com/id/Reflective-Prism/?ALLSTEPS
   */
  var PeppersGhostEffect = /*#__PURE__*/_createClass(function PeppersGhostEffect(renderer) {
    _classCallCheck(this, PeppersGhostEffect);

    var scope = this;
    scope.cameraDistance = 15;
    scope.reflectFromAbove = false; // Internals

    var _halfWidth, _width, _height;

    var _cameraF = new _three.PerspectiveCamera(); //front


    var _cameraB = new _three.PerspectiveCamera(); //back


    var _cameraL = new _three.PerspectiveCamera(); //left


    var _cameraR = new _three.PerspectiveCamera(); //right


    var _position = new _three.Vector3();

    var _quaternion = new _three.Quaternion();

    var _scale = new _three.Vector3(); // Initialization


    renderer.autoClear = false;

    this.setSize = function (width, height) {
      _halfWidth = width / 2;

      if (width < height) {
        _width = width / 3;
        _height = width / 3;
      } else {
        _width = height / 3;
        _height = height / 3;
      }

      renderer.setSize(width, height);
    };

    this.render = function (scene, camera) {
      scene.updateMatrixWorld();
      if (camera.parent === null) camera.updateMatrixWorld();
      camera.matrixWorld.decompose(_position, _quaternion, _scale); // front

      _cameraF.position.copy(_position);

      _cameraF.quaternion.copy(_quaternion);

      _cameraF.translateZ(scope.cameraDistance);

      _cameraF.lookAt(scene.position); // back


      _cameraB.position.copy(_position);

      _cameraB.quaternion.copy(_quaternion);

      _cameraB.translateZ(-scope.cameraDistance);

      _cameraB.lookAt(scene.position);

      _cameraB.rotation.z += 180 * (Math.PI / 180); // left

      _cameraL.position.copy(_position);

      _cameraL.quaternion.copy(_quaternion);

      _cameraL.translateX(-scope.cameraDistance);

      _cameraL.lookAt(scene.position);

      _cameraL.rotation.x += 90 * (Math.PI / 180); // right

      _cameraR.position.copy(_position);

      _cameraR.quaternion.copy(_quaternion);

      _cameraR.translateX(scope.cameraDistance);

      _cameraR.lookAt(scene.position);

      _cameraR.rotation.x += 90 * (Math.PI / 180);
      renderer.clear();
      renderer.setScissorTest(true);
      renderer.setScissor(_halfWidth - _width / 2, _height * 2, _width, _height);
      renderer.setViewport(_halfWidth - _width / 2, _height * 2, _width, _height);

      if (scope.reflectFromAbove) {
        renderer.render(scene, _cameraB);
      } else {
        renderer.render(scene, _cameraF);
      }

      renderer.setScissor(_halfWidth - _width / 2, 0, _width, _height);
      renderer.setViewport(_halfWidth - _width / 2, 0, _width, _height);

      if (scope.reflectFromAbove) {
        renderer.render(scene, _cameraF);
      } else {
        renderer.render(scene, _cameraB);
      }

      renderer.setScissor(_halfWidth - _width / 2 - _width, _height, _width, _height);
      renderer.setViewport(_halfWidth - _width / 2 - _width, _height, _width, _height);

      if (scope.reflectFromAbove) {
        renderer.render(scene, _cameraR);
      } else {
        renderer.render(scene, _cameraL);
      }

      renderer.setScissor(_halfWidth + _width / 2, _height, _width, _height);
      renderer.setViewport(_halfWidth + _width / 2, _height, _width, _height);

      if (scope.reflectFromAbove) {
        renderer.render(scene, _cameraL);
      } else {
        renderer.render(scene, _cameraR);
      }

      renderer.setScissorTest(false);
    };
  });

  _exports.PeppersGhostEffect = PeppersGhostEffect;
});