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

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

  var StereoEffect = /*#__PURE__*/_createClass(function StereoEffect(renderer) {
    _classCallCheck(this, StereoEffect);

    var _stereo = new _three.StereoCamera();

    _stereo.aspect = 0.5;
    var size = new _three.Vector2();

    this.setEyeSeparation = function (eyeSep) {
      _stereo.eyeSep = eyeSep;
    };

    this.setSize = function (width, height) {
      renderer.setSize(width, height);
    };

    this.render = function (scene, camera) {
      scene.updateMatrixWorld();
      if (camera.parent === null) camera.updateMatrixWorld();

      _stereo.update(camera);

      renderer.getSize(size);
      if (renderer.autoClear) renderer.clear();
      renderer.setScissorTest(true);
      renderer.setScissor(0, 0, size.width / 2, size.height);
      renderer.setViewport(0, 0, size.width / 2, size.height);
      renderer.render(scene, _stereo.cameraL);
      renderer.setScissor(size.width / 2, 0, size.width / 2, size.height);
      renderer.setViewport(size.width / 2, 0, size.width / 2, size.height);
      renderer.render(scene, _stereo.cameraR);
      renderer.setScissorTest(false);
    };
  });

  _exports.StereoEffect = StereoEffect;
});