/**
 * Cesium Sensor Volumes - https://github.com/jlouns/cesium-sensor-volumes
 *
 * Copyright 2016 Jonathan Lounsbury
 * Copyright 2011-2014 Analytical Graphics Inc. and Cesium Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Portions licensed separately.
 * See https://github.com/jlouns/cesium-sensor-volumes/blob/master/LICENSE.md for full licensing details.
 *
 * Derived from Cesium Sensors - https://github.com/AnalyticalGraphicsInc/cesium-sensors
 */

;(function () {
  /**
   * @license almond 0.3.3 Copyright jQuery Foundation and other contributors.
   * Released under MIT license, http://github.com/requirejs/almond/LICENSE
   */
  //Going sloppy to avoid 'use strict' string cost, but strict practices should
  //be followed.
  /*global setTimeout: false */

  var requirejs, require, define
  ;(function (undef) {
    var main,
      req,
      makeMap,
      handlers,
      defined = {},
      waiting = {},
      config = {},
      defining = {},
      hasOwn = Object.prototype.hasOwnProperty,
      aps = [].slice,
      jsSuffixRegExp = /\.js$/

    function hasProp(obj, prop) {
      return hasOwn.call(obj, prop)
    }

    /**
     * Given a relative module name, like ./something, normalize it to
     * a real name that can be mapped to a path.
     * @param {String} name the relative name
     * @param {String} baseName a real name that the name arg is relative
     * to.
     * @returns {String} normalized name
     */
    function normalize(name, baseName) {
      var nameParts,
        nameSegment,
        mapValue,
        foundMap,
        lastIndex,
        foundI,
        foundStarMap,
        starI,
        i,
        j,
        part,
        normalizedBaseParts,
        baseParts = baseName && baseName.split("/"),
        map = config.map,
        starMap = (map && map["*"]) || {}

      //Adjust any relative paths.
      if (name) {
        name = name.split("/")
        lastIndex = name.length - 1

        // If wanting node ID compatibility, strip .js from end
        // of IDs. Have to do this here, and not in nameToUrl
        // because node allows either .js or non .js to map
        // to same file.
        if (config.nodeIdCompat && jsSuffixRegExp.test(name[lastIndex])) {
          name[lastIndex] = name[lastIndex].replace(jsSuffixRegExp, "")
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        if (name[0].charAt(0) === "." && baseParts) {
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          //module. For instance, baseName of 'one/two/three', maps to
          //'one/two/three.js', but we want the directory, 'one/two' for
          //this normalization.
          normalizedBaseParts = baseParts.slice(0, baseParts.length - 1)
          name = normalizedBaseParts.concat(name)
        }

        //start trimDots
        for (i = 0; i < name.length; i++) {
          part = name[i]
          if (part === ".") {
            name.splice(i, 1)
            i -= 1
          } else if (part === "..") {
            // If at the start, or previous value is still ..,
            // keep them so that when converted to a path it may
            // still work when converted to a path, even though
            // as an ID it is less than ideal. In larger point
            // releases, may be better to just kick out an error.
            if (i === 0 || (i === 1 && name[2] === "..") || name[i - 1] === "..") {
              continue
            } else if (i > 0) {
              name.splice(i - 1, 2)
              i -= 2
            }
          }
        }
        //end trimDots

        name = name.join("/")
      }

      //Apply map config if available.
      if ((baseParts || starMap) && map) {
        nameParts = name.split("/")

        for (i = nameParts.length; i > 0; i -= 1) {
          nameSegment = nameParts.slice(0, i).join("/")

          if (baseParts) {
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            //So, do joins on the biggest to smallest lengths of baseParts.
            for (j = baseParts.length; j > 0; j -= 1) {
              mapValue = map[baseParts.slice(0, j).join("/")]

              //baseName segment has  config, find if it has one for
              //this name.
              if (mapValue) {
                mapValue = mapValue[nameSegment]
                if (mapValue) {
                  //Match, update name to the new value.
                  foundMap = mapValue
                  foundI = i
                  break
                }
              }
            }
          }

          if (foundMap) {
            break
          }

          //Check for a star map match, but just hold on to it,
          //if there is a shorter segment match later in a matching
          //config, then favor over this star map.
          if (!foundStarMap && starMap && starMap[nameSegment]) {
            foundStarMap = starMap[nameSegment]
            starI = i
          }
        }

        if (!foundMap && foundStarMap) {
          foundMap = foundStarMap
          foundI = starI
        }

        if (foundMap) {
          nameParts.splice(0, foundI, foundMap)
          name = nameParts.join("/")
        }
      }

      return name
    }

    function makeRequire(relName, forceSync) {
      return function () {
        //A version of a require function that passes a moduleName
        //value for items that may need to
        //look up paths relative to the moduleName
        var args = aps.call(arguments, 0)

        //If first arg is not require('string'), and there is only
        //one arg, it is the array form without a callback. Insert
        //a null so that the following concat is correct.
        if (typeof args[0] !== "string" && args.length === 1) {
          args.push(null)
        }
        return req.apply(undef, args.concat([relName, forceSync]))
      }
    }

    function makeNormalize(relName) {
      return function (name) {
        return normalize(name, relName)
      }
    }

    function makeLoad(depName) {
      return function (value) {
        defined[depName] = value
      }
    }

    function callDep(name) {
      if (hasProp(waiting, name)) {
        var args = waiting[name]
        delete waiting[name]
        defining[name] = true
        main.apply(undef, args)
      }

      if (!hasProp(defined, name) && !hasProp(defining, name)) {
        throw new Error("No " + name)
      }
      return defined[name]
    }

    //Turns a plugin!resource to [plugin, resource]
    //with the plugin being undefined if the name
    //did not have a plugin prefix.
    function splitPrefix(name) {
      var prefix,
        index = name ? name.indexOf("!") : -1
      if (index > -1) {
        prefix = name.substring(0, index)
        name = name.substring(index + 1, name.length)
      }
      return [prefix, name]
    }

    //Creates a parts array for a relName where first part is plugin ID,
    //second part is resource ID. Assumes relName has already been normalized.
    function makeRelParts(relName) {
      return relName ? splitPrefix(relName) : []
    }

    /**
     * Makes a name map, normalizing the name, and using a plugin
     * for normalization if necessary. Grabs a ref to plugin
     * too, as an optimization.
     */
    makeMap = function (name, relParts) {
      var plugin,
        parts = splitPrefix(name),
        prefix = parts[0],
        relResourceName = relParts[1]

      name = parts[1]

      if (prefix) {
        prefix = normalize(prefix, relResourceName)
        plugin = callDep(prefix)
      }

      //Normalize according
      if (prefix) {
        if (plugin && plugin.normalize) {
          name = plugin.normalize(name, makeNormalize(relResourceName))
        } else {
          name = normalize(name, relResourceName)
        }
      } else {
        name = normalize(name, relResourceName)
        parts = splitPrefix(name)
        prefix = parts[0]
        name = parts[1]
        if (prefix) {
          plugin = callDep(prefix)
        }
      }

      //Using ridiculous property names for space reasons
      return {
        f: prefix ? prefix + "!" + name : name, //fullName
        n: name,
        pr: prefix,
        p: plugin
      }
    }

    function makeConfig(name) {
      return function () {
        return (config && config.config && config.config[name]) || {}
      }
    }

    handlers = {
      require: function (name) {
        return makeRequire(name)
      },
      exports: function (name) {
        var e = defined[name]
        if (typeof e !== "undefined") {
          return e
        } else {
          return (defined[name] = {})
        }
      },
      module: function (name) {
        return {
          id: name,
          uri: "",
          exports: defined[name],
          config: makeConfig(name)
        }
      }
    }

    main = function (name, deps, callback, relName) {
      var cjsModule,
        depName,
        ret,
        map,
        i,
        relParts,
        args = [],
        callbackType = typeof callback,
        usingExports

      //Use name if no relName
      relName = relName || name
      relParts = makeRelParts(relName)

      //Call the callback to define the module, if necessary.
      if (callbackType === "undefined" || callbackType === "function") {
        //Pull out the defined dependencies and pass the ordered
        //values to the callback.
        //Default to [require, exports, module] if no deps
        deps = !deps.length && callback.length ? ["require", "exports", "module"] : deps
        for (i = 0; i < deps.length; i += 1) {
          map = makeMap(deps[i], relParts)
          depName = map.f

          //Fast path CommonJS standard dependencies.
          if (depName === "require") {
            args[i] = handlers.require(name)
          } else if (depName === "exports") {
            //CommonJS module spec 1.1
            args[i] = handlers.exports(name)
            usingExports = true
          } else if (depName === "module") {
            //CommonJS module spec 1.1
            cjsModule = args[i] = handlers.module(name)
          } else if (hasProp(defined, depName) || hasProp(waiting, depName) || hasProp(defining, depName)) {
            args[i] = callDep(depName)
          } else if (map.p) {
            map.p.load(map.n, makeRequire(relName, true), makeLoad(depName), {})
            args[i] = defined[depName]
          } else {
            throw new Error(name + " missing " + depName)
          }
        }

        ret = callback ? callback.apply(defined[name], args) : undefined

        if (name) {
          //If setting exports via "module" is in play,
          //favor that over return value and exports. After that,
          //favor a non-undefined return value over exports use.
          if (cjsModule && cjsModule.exports !== undef && cjsModule.exports !== defined[name]) {
            defined[name] = cjsModule.exports
          } else if (ret !== undef || !usingExports) {
            //Use the return value from the function.
            defined[name] = ret
          }
        }
      } else if (name) {
        //May just be an object definition for the module. Only
        //worry about defining if have a module name.
        defined[name] = callback
      }
    }

    requirejs =
      require =
      req =
        function (deps, callback, relName, forceSync, alt) {
          if (typeof deps === "string") {
            if (handlers[deps]) {
              //callback in this case is really relName
              return handlers[deps](callback)
            }
            //Just return the module wanted. In this scenario, the
            //deps arg is the module name, and second arg (if passed)
            //is just the relName.
            //Normalize module name, if it contains . or ..
            return callDep(makeMap(deps, makeRelParts(callback)).f)
          } else if (!deps.splice) {
            //deps is a config object, not an array.
            config = deps
            if (config.deps) {
              req(config.deps, config.callback)
            }
            if (!callback) {
              return
            }

            if (callback.splice) {
              //callback is an array, which means it is a dependency list.
              //Adjust args if there are dependencies
              deps = callback
              callback = relName
              relName = null
            } else {
              deps = undef
            }
          }

          //Support require(['a'])
          callback = callback || function () {}

          //If relName is a function, it is an errback handler,
          //so remove it.
          if (typeof relName === "function") {
            relName = forceSync
            forceSync = alt
          }

          //Simulate async callback;
          if (forceSync) {
            main(undef, deps, callback, relName)
          } else {
            //Using a non-zero value because of concern for what old browsers
            //do, and latest browsers "upgrade" to 4 if lower value is used:
            //http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#dom-windowtimers-settimeout:
            //If want a value immediately, use require('id') instead -- something
            //that works in almond on the global level, but not guaranteed and
            //unlikely to work in other AMD implementations.
            setTimeout(function () {
              main(undef, deps, callback, relName)
            }, 4)
          }

          return req
        }

    /**
     * Just drops the config on the floor, but returns req in case
     * the config return value is used.
     */
    req.config = function (cfg) {
      return req(cfg)
    }

    /**
     * Expose module registry for debugging and tooling
     */
    requirejs._defined = defined

    define = function (name, deps, callback) {
      if (typeof name !== "string") {
        throw new Error("See almond README: incorrect module build, no module name")
      }

      //This module may not have dependencies
      if (!deps.splice) {
        //deps is not an array, so probably means
        //an object literal or factory function for
        //the value. Adjust args.
        callback = deps
        deps = []
      }

      if (!hasProp(defined, name) && !hasProp(waiting, name)) {
        waiting[name] = [name, deps, callback]
      }
    }

    define.amd = {
      jQuery: true
    }
  })()

  define("conic/conic-sensor-graphics", [
    "require",
    "Cesium/Core/defaultValue",
    "Cesium/Core/defined",
    "Cesium/Core/DeveloperError",
    "Cesium/Core/Event",
    "Cesium/DataSources/createMaterialPropertyDescriptor",
    "Cesium/DataSources/createPropertyDescriptor"
  ], function (require) {
    "use strict"

    var defaultValue = require("Cesium/Core/defaultValue")
    var defined = require("Cesium/Core/defined")
    var defineProperties = Object.defineProperties
    var DeveloperError = require("Cesium/Core/DeveloperError")
    var Event = require("Cesium/Core/Event")

    var createMaterialPropertyDescriptor = require("Cesium/DataSources/createMaterialPropertyDescriptor")
    var createPropertyDescriptor = require("Cesium/DataSources/createPropertyDescriptor")

    /**
     * An optionally time-dynamic cone.
     *
     * @alias ConicSensorGraphics
     * @constructor
     */
    var ConicSensorGraphics = function (options) {
      this._minimumClockAngle = undefined
      this._minimumClockAngleSubscription = undefined
      this._maximumClockAngle = undefined
      this._maximumClockAngleSubscription = undefined
      this._innerHalfAngle = undefined
      this._innerHalfAngleSubscription = undefined
      this._outerHalfAngle = undefined
      this._outerHalfAngleSubscription = undefined
      this._lateralSurfaceMaterial = undefined
      this._lateralSurfaceMaterialSubscription = undefined
      this._intersectionColor = undefined
      this._intersectionColorSubscription = undefined
      this._intersectionWidth = undefined
      this._intersectionWidthSubscription = undefined
      this._showIntersection = undefined
      this._showIntersectionSubscription = undefined
      this._radius = undefined
      this._radiusSubscription = undefined
      this._show = undefined
      this._showSubscription = undefined
      this._definitionChanged = new Event()

      this.merge(defaultValue(options, defaultValue.EMPTY_OBJECT))
    }

    defineProperties(ConicSensorGraphics.prototype, {
      /**
       * Gets the event that is raised whenever a new property is assigned.
       * @memberof ConicSensorGraphics.prototype
       *
       * @type {Event}
       * @readonly
       */
      definitionChanged: {
        get: function () {
          return this._definitionChanged
        }
      },

      /**
       * Gets or sets the numeric {@link Property} specifying the the cone's minimum clock angle.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      minimumClockAngle: createPropertyDescriptor("minimumClockAngle"),

      /**
       * Gets or sets the numeric {@link Property} specifying the the cone's maximum clock angle.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      maximumClockAngle: createPropertyDescriptor("maximumClockAngle"),

      /**
       * Gets or sets the numeric {@link Property} specifying the the cone's inner half-angle.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      innerHalfAngle: createPropertyDescriptor("innerHalfAngle"),

      /**
       * Gets or sets the numeric {@link Property} specifying the the cone's outer half-angle.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      outerHalfAngle: createPropertyDescriptor("outerHalfAngle"),

      /**
       * Gets or sets the {@link MaterialProperty} specifying the the cone's appearance.
       * @memberof ConicSensorGraphics.prototype
       * @type {MaterialProperty}
       */
      lateralSurfaceMaterial: createMaterialPropertyDescriptor("lateralSurfaceMaterial"),

      /**
       * Gets or sets the {@link Color} {@link Property} specifying the color of the line formed by the intersection of the cone and other central bodies.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      intersectionColor: createPropertyDescriptor("intersectionColor"),

      /**
       * Gets or sets the numeric {@link Property} specifying the width of the line formed by the intersection of the cone and other central bodies.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      intersectionWidth: createPropertyDescriptor("intersectionWidth"),

      /**
       * Gets or sets the boolean {@link Property} specifying the visibility of the line formed by the intersection of the cone and other central bodies.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      showIntersection: createPropertyDescriptor("showIntersection"),

      /**
       * Gets or sets the numeric {@link Property} specifying the radius of the cone's projection.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      radius: createPropertyDescriptor("radius"),

      /**
       * Gets or sets the boolean {@link Property} specifying the visibility of the cone.
       * @memberof ConicSensorGraphics.prototype
       * @type {Property}
       */
      show: createPropertyDescriptor("show")
    })

    /**
     * Duplicates a ConicSensorGraphics instance.
     *
     * @param {ConicSensorGraphics} [result] The object onto which to store the result.
     * @returns {ConicSensorGraphics} The modified result parameter or a new instance if one was not provided.
     */
    ConicSensorGraphics.prototype.clone = function (result) {
      if (!defined(result)) {
        result = new ConicSensorGraphics()
      }
      result.show = this.show
      result.innerHalfAngle = this.innerHalfAngle
      result.outerHalfAngle = this.outerHalfAngle
      result.minimumClockAngle = this.minimumClockAngle
      result.maximumClockAngle = this.maximumClockAngle
      result.radius = this.radius
      result.showIntersection = this.showIntersection
      result.intersectionColor = this.intersectionColor
      result.intersectionWidth = this.intersectionWidth
      result.lateralSurfaceMaterial = this.lateralSurfaceMaterial
      return result
    }

    /**
     * Assigns each unassigned property on this object to the value
     * of the same property on the provided source object.
     *
     * @param {ConicSensorGraphics} source The object to be merged into this object.
     */
    ConicSensorGraphics.prototype.merge = function (source) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(source)) {
        throw new DeveloperError("source is required.")
      }
      // >>includeEnd('debug');

      this.show = defaultValue(this.show, source.show)
      this.innerHalfAngle = defaultValue(this.innerHalfAngle, source.innerHalfAngle)
      this.outerHalfAngle = defaultValue(this.outerHalfAngle, source.outerHalfAngle)
      this.minimumClockAngle = defaultValue(this.minimumClockAngle, source.minimumClockAngle)
      this.maximumClockAngle = defaultValue(this.maximumClockAngle, source.maximumClockAngle)
      this.radius = defaultValue(this.radius, source.radius)
      this.showIntersection = defaultValue(this.showIntersection, source.showIntersection)
      this.intersectionColor = defaultValue(this.intersectionColor, source.intersectionColor)
      this.intersectionWidth = defaultValue(this.intersectionWidth, source.intersectionWidth)
      this.lateralSurfaceMaterial = defaultValue(this.lateralSurfaceMaterial, source.lateralSurfaceMaterial)
    }

    return ConicSensorGraphics
  })

  define("text", {
    load: function (id) {
      throw new Error("Dynamic load not allowed: " + id)
    }
  })

  define("text!custom/custom-sensor-volume-fs.glsl", [], function () {
    return `#ifdef GL_OES_standard_derivatives
    #extension GL_OES_standard_derivatives : enable
    #endif
    uniform bool u_showIntersection;
    uniform bool u_showThroughEllipsoid;
    uniform float u_sensorRadius;
    uniform float u_normalDirection;
    in vec3 v_positionWC;
    in vec3 v_positionEC;
    in vec3 v_normalEC;
    vec4 getColor(float sensorRadius, vec3 pointEC)
    {
    czm_materialInput materialInput;
    vec3 pointMC = (czm_inverseModelView * vec4(pointEC, 1.0)).xyz;
    materialInput.st = sensor2dTextureCoordinates(sensorRadius, pointMC);
    materialInput.str = pointMC / sensorRadius;
    vec3 positionToEyeEC = -v_positionEC;
    materialInput.positionToEyeEC = positionToEyeEC;
    vec3 normalEC = normalize(v_normalEC);
    materialInput.normalEC = u_normalDirection * normalEC;
    czm_material material = czm_getMaterial(materialInput);
    return mix(czm_phong(normalize(positionToEyeEC), material, czm_lightDirectionEC), vec4(material.diffuse, material.alpha), 0.4);
    }
    bool isOnBoundary(float value, float epsilon)
    {
    float width = getIntersectionWidth();
    float tolerance = width * epsilon;
    #ifdef GL_OES_standard_derivatives
    float delta = max(abs(dFdx(value)), abs(dFdy(value)));
    float pixels = width * delta;
    float temp = abs(value);
    return temp < tolerance && temp < pixels || (delta < 10.0 * tolerance && temp - delta < tolerance && temp < pixels);
    #else
    return abs(value) < tolerance;
    #endif
    }
    vec4 shade(bool isOnBoundary)
    {
    if (u_showIntersection && isOnBoundary)
    {
    return getIntersectionColor();
    }
    return getColor(u_sensorRadius, v_positionEC);
    }
    float ellipsoidSurfaceFunction( vec3 point)
    {
    vec3 scaled = czm_ellipsoidInverseRadii * point;
    return dot(scaled, scaled) - 1.0;
    }
    void main()
    {
    vec3 sensorVertexWC = czm_model[3].xyz;
    vec3 sensorVertexEC = czm_modelView[3].xyz;
    float ellipsoidValue = ellipsoidSurfaceFunction( v_positionWC);
    if (!u_showThroughEllipsoid)
    {
    if (ellipsoidValue < 0.0)
    {
    discard;
    }
    if (inSensorShadow(sensorVertexWC, v_positionWC))
    {
    discard;
    }
    }
    if (distance(v_positionEC, sensorVertexEC) > u_sensorRadius)
    {
    discard;
    }
    bool isOnEllipsoid = isOnBoundary(ellipsoidValue, czm_epsilon3);
    out_FragColor = shade(isOnEllipsoid);
    }
    `
  })

  define("text!custom/custom-sensor-volume-vs.glsl", [], function () {
    return `in vec4 position;
    in vec3 normal;
    out vec3 v_positionWC;
    out vec3 v_positionEC;
    out vec3 v_normalEC;
    void main()
    {
    gl_Position = czm_modelViewProjection * position;
    v_positionWC = (czm_model * position).xyz;
    v_positionEC = (czm_modelView * position).xyz;
    v_normalEC = czm_normal * normal;
    }
    `
  })

  define("text!sensor-volume.glsl", [], function () {
    return  `uniform vec4 u_intersectionColor;
    uniform float u_intersectionWidth;
    bool inSensorShadow(vec3 coneVertexWC, vec3 pointWC)
    {
    vec3 D = czm_ellipsoidInverseRadii;
    vec3 q = D * coneVertexWC;
    float qMagnitudeSquared = dot(q, q);
    float test = qMagnitudeSquared - 1.0;
    vec3 temp = D * pointWC - q;
    float d = dot(temp, q);
    return (d < -test) && (d / length(temp) < -sqrt(test));
    }
    vec4 getIntersectionColor()
    {
    return u_intersectionColor;
    }
    float getIntersectionWidth()
    {
    return u_intersectionWidth;
    }
    vec2 sensor2dTextureCoordinates(float sensorRadius, vec3 pointMC)
    {
    float t = pointMC.z / sensorRadius;
    float s = 1.0 + (atan(pointMC.y, pointMC.x) / czm_twoPi);
    s = s - floor(s);
    return vec2(s, t);
    }
    `
  })

  define("custom/custom-sensor-volume", [
    "require",
    "Cesium/Core/BoundingSphere",
    "Cesium/Core/Cartesian3",
    "Cesium/Core/Color",
    "Cesium/Core/combine",
    "Cesium/Core/ComponentDatatype",
    "Cesium/Core/defaultValue",
    "Cesium/Core/defined",
    "Cesium/Core/destroyObject",
    "Cesium/Core/DeveloperError",
    "Cesium/Core/Matrix4",
    "Cesium/Core/PrimitiveType",
    "Cesium/Renderer/Buffer",
    "Cesium/Renderer/BufferUsage",
    "Cesium/Renderer/DrawCommand",
    "Cesium/Renderer/Pass",
    "Cesium/Renderer/RenderState",
    "Cesium/Renderer/ShaderProgram",
    "Cesium/Renderer/ShaderSource",
    "Cesium/Renderer/VertexArray",
    "Cesium/Scene/BlendingState",
    "Cesium/Scene/CullFace",
    "Cesium/Scene/Material",
    "Cesium/Scene/SceneMode",
    "text!./custom-sensor-volume-fs.glsl",
    "text!./custom-sensor-volume-vs.glsl",
    "text!../sensor-volume.glsl"
  ], function (require) {
    "use strict"

    var BoundingSphere = require("Cesium/Core/BoundingSphere")
    var Cartesian3 = require("Cesium/Core/Cartesian3")
    var Color = require("Cesium/Core/Color")
    var combine = require("Cesium/Core/combine")
    var ComponentDatatype = require("Cesium/Core/ComponentDatatype")
    var defaultValue = require("Cesium/Core/defaultValue")
    var defined = require("Cesium/Core/defined")
    var defineProperties = Object.defineProperties
    var destroyObject = require("Cesium/Core/destroyObject")
    var DeveloperError = require("Cesium/Core/DeveloperError")
    var Matrix4 = require("Cesium/Core/Matrix4")
    var PrimitiveType = require("Cesium/Core/PrimitiveType")
    var Buffer = require("Cesium/Renderer/Buffer")
    var BufferUsage = require("Cesium/Renderer/BufferUsage")
    var DrawCommand = require("Cesium/Renderer/DrawCommand")
    var Pass = require("Cesium/Renderer/Pass")
    var RenderState = require("Cesium/Renderer/RenderState")
    var ShaderProgram = require("Cesium/Renderer/ShaderProgram")
    var ShaderSource = require("Cesium/Renderer/ShaderSource")
    var VertexArray = require("Cesium/Renderer/VertexArray")
    var BlendingState = require("Cesium/Scene/BlendingState")
    var CullFace = require("Cesium/Scene/CullFace")
    var Material = require("Cesium/Scene/Material")
    var SceneMode = require("Cesium/Scene/SceneMode")

    var CustomSensorVolumeFS = require("text!./custom-sensor-volume-fs.glsl")
    var CustomSensorVolumeVS = require("text!./custom-sensor-volume-vs.glsl")
    var SensorVolume = require("text!../sensor-volume.glsl")

    var attributeLocations = {
      position: 0,
      normal: 1
    }

    var FAR = 5906376272000.0 // distance from the Sun to Pluto in meters.

    /**
     * DOC_TBA
     *
     * @alias CustomSensorVolume
     * @constructor
     */
    var CustomSensorVolume = function (options) {
      options = defaultValue(options, defaultValue.EMPTY_OBJECT)

      this._pickId = undefined
      this._pickPrimitive = defaultValue(options._pickPrimitive, this)

      this._frontFaceColorCommand = new DrawCommand()
      this._backFaceColorCommand = new DrawCommand()
      this._pickCommand = new DrawCommand()

      this._boundingSphere = new BoundingSphere()
      this._boundingSphereWC = new BoundingSphere()

      this._frontFaceColorCommand.primitiveType = PrimitiveType.TRIANGLES
      this._frontFaceColorCommand.boundingVolume = this._boundingSphereWC
      this._frontFaceColorCommand.owner = this

      this._backFaceColorCommand.primitiveType = this._frontFaceColorCommand.primitiveType
      this._backFaceColorCommand.boundingVolume = this._frontFaceColorCommand.boundingVolume
      this._backFaceColorCommand.owner = this

      this._pickCommand.primitiveType = this._frontFaceColorCommand.primitiveType
      this._pickCommand.boundingVolume = this._frontFaceColorCommand.boundingVolume
      this._pickCommand.owner = this

      /**
       * <code>true</code> if this sensor will be shown; otherwise, <code>false</code>
       *
       * @type {Boolean}
       * @default true
       */
      this.show = defaultValue(options.show, true)

      /**
       * When <code>true</code>, a polyline is shown where the sensor outline intersections the globe.
       *
       * @type {Boolean}
       *
       * @default true
       *
       * @see CustomSensorVolume#intersectionColor
       */
      this.showIntersection = defaultValue(options.showIntersection, true)

      /**
       * <p>
       * Determines if a sensor intersecting the ellipsoid is drawn through the ellipsoid and potentially out
       * to the other side, or if the part of the sensor intersecting the ellipsoid stops at the ellipsoid.
       * </p>
       *
       * @type {Boolean}
       * @default false
       */
      this.showThroughEllipsoid = defaultValue(options.showThroughEllipsoid, false)
      this._showThroughEllipsoid = this.showThroughEllipsoid

      /**
       * The 4x4 transformation matrix that transforms this sensor from model to world coordinates.  In it's model
       * coordinates, the sensor's principal direction is along the positive z-axis.  The clock angle, sometimes
       * called azimuth, is the angle in the sensor's X-Y plane measured from the positive X-axis toward the positive
       * Y-axis.  The cone angle, sometimes called elevation, is the angle out of the X-Y plane along the positive Z-axis.
       * <br /><br />
       * <div align='center'>
       * <img src='images/CustomSensorVolume.setModelMatrix.png' /><br />
       * Model coordinate system for a custom sensor
       * </div>
       *
       * @type {Matrix4}
       * @default {@link Matrix4.IDENTITY}
       *
       * @example
       * // The sensor's vertex is located on the surface at -75.59777 degrees longitude and 40.03883 degrees latitude.
       * // The sensor's opens upward, along the surface normal.
       * var center = Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883);
       * sensor.modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(center);
       */
      this.modelMatrix = Matrix4.clone(defaultValue(options.modelMatrix, Matrix4.IDENTITY))
      this._modelMatrix = new Matrix4()

      /**
       * DOC_TBA
       *
       * @type {Number}
       * @default {@link Number.POSITIVE_INFINITY}
       */
      this.radius = defaultValue(options.radius, Number.POSITIVE_INFINITY)

      this._directions = undefined
      this._directionsDirty = false
      this.directions = defined(options.directions) ? options.directions : []

      /**
       * The surface appearance of the sensor.  This can be one of several built-in {@link Material} objects or a custom material, scripted with
       * {@link https://github.com/AnalyticalGraphicsInc/cesium/wiki/Fabric|Fabric}.
       * <p>
       * The default material is <code>Material.ColorType</code>.
       * </p>
       *
       * @type {Material}
       * @default Material.fromType(Material.ColorType)
       *
       * @see {@link https://github.com/AnalyticalGraphicsInc/cesium/wiki/Fabric|Fabric}
       *
       * @example
       * // 1. Change the color of the default material to yellow
       * sensor.lateralSurfaceMaterial.uniforms.color = new Cesium.Color(1.0, 1.0, 0.0, 1.0);
       *
       * // 2. Change material to horizontal stripes
       * sensor.lateralSurfaceMaterial = Cesium.Material.fromType(Material.StripeType);
       */
      this.lateralSurfaceMaterial = defined(options.lateralSurfaceMaterial) ? options.lateralSurfaceMaterial : Material.fromType(Material.ColorType)
      this._lateralSurfaceMaterial = undefined
      this._translucent = undefined

      /**
       * The color of the polyline where the sensor outline intersects the globe.  The default is {@link Color.WHITE}.
       *
       * @type {Color}
       * @default {@link Color.WHITE}
       *
       * @see CustomSensorVolume#showIntersection
       */
      this.intersectionColor = Color.clone(defaultValue(options.intersectionColor, Color.WHITE))

      /**
       * The approximate pixel width of the polyline where the sensor outline intersects the globe.  The default is 5.0.
       *
       * @type {Number}
       * @default 5.0
       *
       * @see CustomSensorVolume#showIntersection
       */
      this.intersectionWidth = defaultValue(options.intersectionWidth, 5.0)

      /**
       * User-defined object returned when the sensors is picked.
       *
       * @type Object
       *
       * @default undefined
       *
       * @see Scene#pick
       */
      this.id = options.id
      this._id = undefined

      var that = this

      /* eslint-disable camelcase */
      this._uniforms = {
        u_showThroughEllipsoid: function () {
          return that.showThroughEllipsoid
        },
        u_showIntersection: function () {
          return that.showIntersection
        },
        u_sensorRadius: function () {
          return isFinite(that.radius) ? that.radius : FAR
        },
        u_intersectionColor: function () {
          return that.intersectionColor
        },
        u_intersectionWidth: function () {
          return that.intersectionWidth
        },
        u_normalDirection: function () {
          return 1.0
        }
      }
    }

    defineProperties(CustomSensorVolume.prototype, {
      directions: {
        get: function () {
          return this._directions
        },
        set: function (value) {
          this._directions = value
          this._directionsDirty = true
        }
      }
    })

    var n0Scratch = new Cartesian3()
    var n1Scratch = new Cartesian3()
    var n2Scratch = new Cartesian3()
    function computePositions(customSensorVolume) {
      var directions = customSensorVolume._directions
      var length = directions.length
      var positions = new Float32Array(3 * length)
      var r = isFinite(customSensorVolume.radius) ? customSensorVolume.radius : FAR

      var boundingVolumePositions = [Cartesian3.ZERO]

      for (var i = length - 2, j = length - 1, k = 0; k < length; i = j++, j = k++) {
        // PERFORMANCE_IDEA:  We can avoid redundant operations for adjacent edges.
        var n0 = Cartesian3.fromSpherical(directions[i], n0Scratch)
        var n1 = Cartesian3.fromSpherical(directions[j], n1Scratch)
        var n2 = Cartesian3.fromSpherical(directions[k], n2Scratch)

        // Extend position so the volume encompasses the sensor's radius.
        var theta = Math.max(Cartesian3.angleBetween(n0, n1), Cartesian3.angleBetween(n1, n2))
        var distance = r / Math.cos(theta * 0.5)
        var p = Cartesian3.multiplyByScalar(n1, distance, new Cartesian3())

        positions[j * 3] = p.x
        positions[j * 3 + 1] = p.y
        positions[j * 3 + 2] = p.z

        boundingVolumePositions.push(p)
      }

      BoundingSphere.fromPoints(boundingVolumePositions, customSensorVolume._boundingSphere)

      return positions
    }

    var nScratch = new Cartesian3()
    function createVertexArray(customSensorVolume, context) {
      var positions = computePositions(customSensorVolume)

      var length = customSensorVolume._directions.length
      var vertices = new Float32Array(2 * 3 * 3 * length)

      var k = 0
      for (var i = length - 1, j = 0; j < length; i = j++) {
        var p0 = new Cartesian3(positions[i * 3], positions[i * 3 + 1], positions[i * 3 + 2])
        var p1 = new Cartesian3(positions[j * 3], positions[j * 3 + 1], positions[j * 3 + 2])
        var n = Cartesian3.normalize(Cartesian3.cross(p1, p0, nScratch), nScratch) // Per-face normals

        vertices[k++] = 0.0 // Sensor vertex
        vertices[k++] = 0.0
        vertices[k++] = 0.0
        vertices[k++] = n.x
        vertices[k++] = n.y
        vertices[k++] = n.z

        vertices[k++] = p1.x
        vertices[k++] = p1.y
        vertices[k++] = p1.z
        vertices[k++] = n.x
        vertices[k++] = n.y
        vertices[k++] = n.z

        vertices[k++] = p0.x
        vertices[k++] = p0.y
        vertices[k++] = p0.z
        vertices[k++] = n.x
        vertices[k++] = n.y
        vertices[k++] = n.z
      }

      var vertexBuffer = Buffer.createVertexBuffer({
        context: context,
        typedArray: new Float32Array(vertices),
        usage: BufferUsage.STATIC_DRAW
      })

      var stride = 2 * 3 * Float32Array.BYTES_PER_ELEMENT

      var attributes = [
        {
          index: attributeLocations.position,
          vertexBuffer: vertexBuffer,
          componentsPerAttribute: 3,
          componentDatatype: ComponentDatatype.FLOAT,
          offsetInBytes: 0,
          strideInBytes: stride
        },
        {
          index: attributeLocations.normal,
          vertexBuffer: vertexBuffer,
          componentsPerAttribute: 3,
          componentDatatype: ComponentDatatype.FLOAT,
          offsetInBytes: 3 * Float32Array.BYTES_PER_ELEMENT,
          strideInBytes: stride
        }
      ]

      return new VertexArray({
        context: context,
        attributes: attributes
      })
    }

    /**
     * Called when {@link Viewer} or {@link CesiumWidget} render the scene to
     * get the draw commands needed to render this primitive.
     * <p>
     * Do not call this function directly.  This is documented just to
     * list the exceptions that may be propagated when the scene is rendered:
     * </p>
     *
     * @exception {DeveloperError} this.radius must be greater than or equal to zero.
     * @exception {DeveloperError} this.lateralSurfaceMaterial must be defined.
     */
    CustomSensorVolume.prototype.update = function (frameState) {
      if (!this.show || frameState.mode !== SceneMode.SCENE3D) {
        return
      }

      var context = frameState.context
      var commandList = frameState.commandList

      // >>includeStart('debug', pragmas.debug);
      if (this.radius < 0.0) {
        throw new DeveloperError("this.radius must be greater than or equal to zero.")
      }
      if (!defined(this.lateralSurfaceMaterial)) {
        throw new DeveloperError("this.lateralSurfaceMaterial must be defined.")
      }
      // >>includeEnd('debug');

      var translucent = this.lateralSurfaceMaterial.isTranslucent()

      // Initial render state creation
      if (
        this._showThroughEllipsoid !== this.showThroughEllipsoid ||
        !defined(this._frontFaceColorCommand.renderState) ||
        this._translucent !== translucent
      ) {
        this._showThroughEllipsoid = this.showThroughEllipsoid
        this._translucent = translucent

        var rs

        if (translucent) {
          rs = RenderState.fromCache({
            depthTest: {
              // This would be better served by depth testing with a depth buffer that does not
              // include the ellipsoid depth - or a g-buffer containing an ellipsoid mask
              // so we can selectively depth test.
              enabled: !this.showThroughEllipsoid
            },
            depthMask: false,
            blending: BlendingState.ALPHA_BLEND,
            cull: {
              enabled: true,
              face: CullFace.BACK
            }
          })

          this._frontFaceColorCommand.renderState = rs
          this._frontFaceColorCommand.pass = Pass.TRANSLUCENT

          rs = RenderState.fromCache({
            depthTest: {
              enabled: !this.showThroughEllipsoid
            },
            depthMask: false,
            blending: BlendingState.ALPHA_BLEND,
            cull: {
              enabled: true,
              face: CullFace.FRONT
            }
          })

          this._backFaceColorCommand.renderState = rs
          this._backFaceColorCommand.pass = Pass.TRANSLUCENT

          rs = RenderState.fromCache({
            depthTest: {
              enabled: !this.showThroughEllipsoid
            },
            depthMask: false,
            blending: BlendingState.ALPHA_BLEND
          })
          this._pickCommand.renderState = rs
        } else {
          rs = RenderState.fromCache({
            depthTest: {
              enabled: true
            },
            depthMask: true
          })
          this._frontFaceColorCommand.renderState = rs
          this._frontFaceColorCommand.pass = Pass.OPAQUE

          rs = RenderState.fromCache({
            depthTest: {
              enabled: true
            },
            depthMask: true
          })
          this._pickCommand.renderState = rs
        }
      }

      // Recreate vertex buffer when directions change
      var directionsChanged = this._directionsDirty
      if (directionsChanged) {
        this._directionsDirty = false
        this._va = this._va && this._va.destroy()

        var directions = this._directions
        if (directions && directions.length >= 3) {
          this._frontFaceColorCommand.vertexArray = createVertexArray(this, context)
          this._backFaceColorCommand.vertexArray = this._frontFaceColorCommand.vertexArray
          this._pickCommand.vertexArray = this._frontFaceColorCommand.vertexArray
        }
      }

      if (!defined(this._frontFaceColorCommand.vertexArray)) {
        return
      }

      var pass = frameState.passes

      var modelMatrixChanged = !Matrix4.equals(this.modelMatrix, this._modelMatrix)
      if (modelMatrixChanged) {
        Matrix4.clone(this.modelMatrix, this._modelMatrix)
      }

      if (directionsChanged || modelMatrixChanged) {
        BoundingSphere.transform(this._boundingSphere, this.modelMatrix, this._boundingSphereWC)
      }

      this._frontFaceColorCommand.modelMatrix = this.modelMatrix
      this._backFaceColorCommand.modelMatrix = this._frontFaceColorCommand.modelMatrix
      this._pickCommand.modelMatrix = this._frontFaceColorCommand.modelMatrix

      var materialChanged = this._lateralSurfaceMaterial !== this.lateralSurfaceMaterial
      this._lateralSurfaceMaterial = this.lateralSurfaceMaterial
      this._lateralSurfaceMaterial.update(context)

      if (pass.render) {
        var frontFaceColorCommand = this._frontFaceColorCommand
        var backFaceColorCommand = this._backFaceColorCommand

        // Recompile shader when material changes
        if (materialChanged || !defined(frontFaceColorCommand.shaderProgram)) {
          var fsSource = new ShaderSource({
            sources: [SensorVolume, this._lateralSurfaceMaterial.shaderSource, CustomSensorVolumeFS]
          })

          frontFaceColorCommand.shaderProgram = ShaderProgram.replaceCache({
            context: context,
            shaderProgram: frontFaceColorCommand.shaderProgram,
            vertexShaderSource: CustomSensorVolumeVS,
            fragmentShaderSource: fsSource,
            attributeLocations: attributeLocations
          })

          frontFaceColorCommand.uniformMap = combine(this._uniforms, this._lateralSurfaceMaterial._uniforms)

          backFaceColorCommand.shaderProgram = frontFaceColorCommand.shaderProgram
          backFaceColorCommand.uniformMap = combine(this._uniforms, this._lateralSurfaceMaterial._uniforms)
          // eslint-disable-next-line camelcase
          backFaceColorCommand.uniformMap.u_normalDirection = function () {
            return -1.0
          }
        }

        if (translucent) {
          commandList.push(this._backFaceColorCommand, this._frontFaceColorCommand)
        } else {
          commandList.push(this._frontFaceColorCommand)
        }
      }

      if (pass.pick) {
        var pickCommand = this._pickCommand

        if (!defined(this._pickId) || this._id !== this.id) {
          this._id = this.id
          this._pickId = this._pickId && this._pickId.destroy()
          this._pickId = context.createPickId({
            primitive: this._pickPrimitive,
            id: this.id
          })
        }

        // Recompile shader when material changes
        if (materialChanged || !defined(pickCommand.shaderProgram)) {
          var pickFS = new ShaderSource({
            sources: [SensorVolume, this._lateralSurfaceMaterial.shaderSource, CustomSensorVolumeFS],
            pickColorQualifier: "uniform"
          })

          pickCommand.shaderProgram = ShaderProgram.replaceCache({
            context: context,
            shaderProgram: pickCommand.shaderProgram,
            vertexShaderSource: CustomSensorVolumeVS,
            fragmentShaderSource: pickFS,
            attributeLocations: attributeLocations
          })

          var that = this
          var uniforms = {
            // eslint-disable-next-line camelcase
            czm_pickColor: function () {
              return that._pickId.color
            }
          }
          pickCommand.uniformMap = combine(combine(this._uniforms, this._lateralSurfaceMaterial._uniforms), uniforms)
        }

        pickCommand.pass = translucent ? Pass.TRANSLUCENT : Pass.OPAQUE
        commandList.push(pickCommand)
      }
    }

    /**
     * DOC_TBA
     */
    CustomSensorVolume.prototype.isDestroyed = function () {
      return false
    }

    /**
     * DOC_TBA
     */
    CustomSensorVolume.prototype.destroy = function () {
      this._frontFaceColorCommand.vertexArray = this._frontFaceColorCommand.vertexArray && this._frontFaceColorCommand.vertexArray.destroy()
      this._frontFaceColorCommand.shaderProgram = this._frontFaceColorCommand.shaderProgram && this._frontFaceColorCommand.shaderProgram.destroy()
      this._pickCommand.shaderProgram = this._pickCommand.shaderProgram && this._pickCommand.shaderProgram.destroy()
      this._pickId = this._pickId && this._pickId.destroy()
      return destroyObject(this)
    }

    return CustomSensorVolume
  })

  define("util/remove-primitive", ["require", "Cesium/Core/defined"], function (require) {
    "use strict"

    var defined = require("Cesium/Core/defined")

    return function removePrimitive(entity, hash, primitives) {
      var data = hash[entity.id]
      if (defined(data)) {
        var primitive = data.primitive
        primitives.remove(primitive)
        if (!primitive.isDestroyed()) {
          primitive.destroy()
        }
        delete hash[entity.id]
      }
    }
  })

  define("conic/conic-sensor-visualizer", [
    "require",
    "Cesium/Core/AssociativeArray",
    "Cesium/Core/Cartesian3",
    "Cesium/Core/Color",
    "Cesium/Core/defined",
    "Cesium/Core/destroyObject",
    "Cesium/Core/DeveloperError",
    "Cesium/Core/Math",
    "Cesium/Core/Matrix3",
    "Cesium/Core/Matrix4",
    "Cesium/Core/Quaternion",
    "Cesium/Core/Spherical",
    "Cesium/DataSources/MaterialProperty",
    "Cesium/DataSources/Property",
    "../custom/custom-sensor-volume",
    "../util/remove-primitive"
  ], function (require) {
    "use strict"

    var AssociativeArray = require("Cesium/Core/AssociativeArray")
    var Cartesian3 = require("Cesium/Core/Cartesian3")
    var Color = require("Cesium/Core/Color")
    var defined = require("Cesium/Core/defined")
    var destroyObject = require("Cesium/Core/destroyObject")
    var DeveloperError = require("Cesium/Core/DeveloperError")
    var CesiumMath = require("Cesium/Core/Math")
    var Matrix3 = require("Cesium/Core/Matrix3")
    var Matrix4 = require("Cesium/Core/Matrix4")
    var Quaternion = require("Cesium/Core/Quaternion")
    var Spherical = require("Cesium/Core/Spherical")
    var MaterialProperty = require("Cesium/DataSources/MaterialProperty")
    var Property = require("Cesium/DataSources/Property")

    var CustomSensorVolume = require("../custom/custom-sensor-volume")
    var removePrimitive = require("../util/remove-primitive")

    var defaultIntersectionColor = Color.WHITE
    var defaultIntersectionWidth = 1.0
    var defaultRadius = Number.POSITIVE_INFINITY

    var matrix3Scratch = new Matrix3()
    var cachedPosition = new Cartesian3()
    var cachedOrientation = new Quaternion()

    function assignSpherical(index, array, clock, cone) {
      var spherical = array[index]
      if (!defined(spherical)) {
        spherical = new Spherical()
        array[index] = spherical
      }
      spherical.clock = clock
      spherical.cone = cone
      spherical.magnitude = 1.0
    }

    function computeDirections(primitive, minimumClockAngle, maximumClockAngle, innerHalfAngle, outerHalfAngle) {
      var directions = primitive.directions
      var angle
      var i = 0
      var angleStep = CesiumMath.toRadians(2.0)
      if (minimumClockAngle === 0.0 && maximumClockAngle === CesiumMath.TWO_PI) {
        // No clock angle limits, so this is just a circle.
        // There might be a hole but we're ignoring it for now.
        for (angle = 0.0; angle < CesiumMath.TWO_PI; angle += angleStep) {
          assignSpherical(i++, directions, angle, outerHalfAngle)
        }
      } else {
        // There are clock angle limits.
        for (angle = minimumClockAngle; angle < maximumClockAngle; angle += angleStep) {
          assignSpherical(i++, directions, angle, outerHalfAngle)
        }
        assignSpherical(i++, directions, maximumClockAngle, outerHalfAngle)
        if (innerHalfAngle) {
          for (angle = maximumClockAngle; angle > minimumClockAngle; angle -= angleStep) {
            assignSpherical(i++, directions, angle, innerHalfAngle)
          }
          assignSpherical(i++, directions, minimumClockAngle, innerHalfAngle)
        } else {
          assignSpherical(i++, directions, maximumClockAngle, 0.0)
        }
      }
      directions.length = i
      primitive.directions = directions
    }

    /**
     * A {@link Visualizer} which maps {@link Entity#conicSensor} to a {@link ConicSensor}.
     * @alias ConicSensorVisualizer
     * @constructor
     *
     * @param {Scene} scene The scene the primitives will be rendered in.
     * @param {EntityCollection} entityCollection The entityCollection to visualize.
     */
    var ConicSensorVisualizer = function (scene, entityCollection) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(scene)) {
        throw new DeveloperError("scene is required.")
      }
      if (!defined(entityCollection)) {
        throw new DeveloperError("entityCollection is required.")
      }
      // >>includeEnd('debug');

      entityCollection.collectionChanged.addEventListener(ConicSensorVisualizer.prototype._onCollectionChanged, this)

      this._scene = scene
      this._primitives = scene.primitives
      this._entityCollection = entityCollection
      this._hash = {}
      this._entitiesToVisualize = new AssociativeArray()

      this._onCollectionChanged(entityCollection, entityCollection.values, [], [])
    }

    /**
     * Updates the primitives created by this visualizer to match their
     * Entity counterpart at the given time.
     *
     * @param {JulianDate} time The time to update to.
     * @returns {Boolean} This function always returns true.
     */
    ConicSensorVisualizer.prototype.update = function (time) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(time)) {
        throw new DeveloperError("time is required.")
      }
      // >>includeEnd('debug');

      var entities = this._entitiesToVisualize.values
      var hash = this._hash
      var primitives = this._primitives

      for (var i = 0, len = entities.length; i < len; i++) {
        var entity = entities[i]
        var conicSensorGraphics = entity._conicSensor

        var position
        var orientation
        var data = hash[entity.id]
        var show = entity.isShowing && entity.isAvailable(time) && Property.getValueOrDefault(conicSensorGraphics._show, time, true)

        if (show) {
          position = Property.getValueOrUndefined(entity._position, time, cachedPosition)
          orientation = Property.getValueOrUndefined(entity._orientation, time, cachedOrientation)
          show = defined(position) && defined(orientation)
        }

        if (!show) {
          // don't bother creating or updating anything else
          if (defined(data)) {
            data.primitive.show = false
          }
          continue
        }

        var primitive = defined(data) ? data.primitive : undefined
        if (!defined(primitive)) {
          primitive = new CustomSensorVolume()
          primitive.id = entity
          primitives.add(primitive)

          data = {
            primitive: primitive,
            position: undefined,
            orientation: undefined,
            minimumClockAngle: undefined,
            maximumClockAngle: undefined,
            innerHalfAngle: undefined,
            outerHalfAngle: undefined
          }
          hash[entity.id] = data
        }

        if (!Cartesian3.equals(position, data.position) || !Quaternion.equals(orientation, data.orientation)) {
          Matrix4.fromRotationTranslation(Matrix3.fromQuaternion(orientation, matrix3Scratch), position, primitive.modelMatrix)
          data.position = Cartesian3.clone(position, data.position)
          data.orientation = Quaternion.clone(orientation, data.orientation)
        }

        primitive.show = true
        var minimumClockAngle = Property.getValueOrDefault(conicSensorGraphics._minimumClockAngle, time, 0)
        var maximumClockAngle = Property.getValueOrDefault(conicSensorGraphics._maximumClockAngle, time, CesiumMath.TWO_PI)
        var innerHalfAngle = Property.getValueOrDefault(conicSensorGraphics._innerHalfAngle, time, 0)
        var outerHalfAngle = Property.getValueOrDefault(conicSensorGraphics._outerHalfAngle, time, Math.PI)

        if (
          minimumClockAngle !== data.minimumClockAngle ||
          maximumClockAngle !== data.maximumClockAngle ||
          innerHalfAngle !== data.innerHalfAngle ||
          outerHalfAngle !== data.outerHalfAngle
        ) {
          computeDirections(primitive, minimumClockAngle, maximumClockAngle, innerHalfAngle, outerHalfAngle)
          data.innerHalfAngle = innerHalfAngle
          data.maximumClockAngle = maximumClockAngle
          data.outerHalfAngle = outerHalfAngle
          data.minimumClockAngle = minimumClockAngle
        }

        primitive.radius = Property.getValueOrDefault(conicSensorGraphics._radius, time, defaultRadius)
        primitive.lateralSurfaceMaterial = MaterialProperty.getValue(
          time,
          conicSensorGraphics._lateralSurfaceMaterial,
          primitive.lateralSurfaceMaterial
        )
        primitive.intersectionColor = Property.getValueOrClonedDefault(
          conicSensorGraphics._intersectionColor,
          time,
          defaultIntersectionColor,
          primitive.intersectionColor
        )
        primitive.intersectionWidth = Property.getValueOrDefault(conicSensorGraphics._intersectionWidth, time, defaultIntersectionWidth)
      }
      return true
    }

    /**
     * Returns true if this object was destroyed; otherwise, false.
     *
     * @returns {Boolean} True if this object was destroyed; otherwise, false.
     */
    ConicSensorVisualizer.prototype.isDestroyed = function () {
      return false
    }

    /**
     * Removes and destroys all primitives created by this instance.
     */
    ConicSensorVisualizer.prototype.destroy = function () {
      var entities = this._entitiesToVisualize.values
      var hash = this._hash
      var primitives = this._primitives
      for (var i = entities.length - 1; i > -1; i--) {
        removePrimitive(entities[i], hash, primitives)
      }
      return destroyObject(this)
    }

    /**
     * @private
     */
    ConicSensorVisualizer.prototype._onCollectionChanged = function (entityCollection, added, removed, changed) {
      var i
      var entity
      var entities = this._entitiesToVisualize
      var hash = this._hash
      var primitives = this._primitives

      for (i = added.length - 1; i > -1; i--) {
        entity = added[i]
        if (defined(entity._conicSensor) && defined(entity._position) && defined(entity._orientation)) {
          entities.set(entity.id, entity)
        }
      }

      for (i = changed.length - 1; i > -1; i--) {
        entity = changed[i]
        if (defined(entity._conicSensor) && defined(entity._position) && defined(entity._orientation)) {
          entities.set(entity.id, entity)
        } else {
          removePrimitive(entity, hash, primitives)
          entities.remove(entity.id)
        }
      }

      for (i = removed.length - 1; i > -1; i--) {
        entity = removed[i]
        removePrimitive(entity, hash, primitives)
        entities.remove(entity.id)
      }
    }

    return ConicSensorVisualizer
  })

  define("custom/custom-pattern-sensor-graphics", [
    "require",
    "Cesium/Core/defaultValue",
    "Cesium/Core/defined",
    "Cesium/Core/DeveloperError",
    "Cesium/Core/Event",
    "Cesium/DataSources/createMaterialPropertyDescriptor",
    "Cesium/DataSources/createPropertyDescriptor"
  ], function (require) {
    "use strict"

    var defaultValue = require("Cesium/Core/defaultValue")
    var defined = require("Cesium/Core/defined")
    var defineProperties = Object.defineProperties
    var DeveloperError = require("Cesium/Core/DeveloperError")
    var Event = require("Cesium/Core/Event")

    var createMaterialPropertyDescriptor = require("Cesium/DataSources/createMaterialPropertyDescriptor")
    var createPropertyDescriptor = require("Cesium/DataSources/createPropertyDescriptor")

    /**
     * An optionally time-dynamic custom patterned sensor.
     *
     * @alias CustomPatternSensorGraphics
     * @constructor
     */
    var CustomPatternSensorGraphics = function (options) {
      this._directions = undefined
      this._directionsSubscription = undefined

      this._lateralSurfaceMaterial = undefined
      this._lateralSurfaceMaterialSubscription = undefined

      this._intersectionColor = undefined
      this._intersectionColorSubscription = undefined
      this._intersectionWidth = undefined
      this._intersectionWidthSubscription = undefined
      this._showIntersection = undefined
      this._showIntersectionSubscription = undefined
      this._radius = undefined
      this._radiusSubscription = undefined
      this._show = undefined
      this._showSubscription = undefined
      this._definitionChanged = new Event()

      this.merge(defaultValue(options, defaultValue.EMPTY_OBJECT))
    }

    defineProperties(CustomPatternSensorGraphics.prototype, {
      /**
       * Gets the event that is raised whenever a new property is assigned.
       * @memberof CustomPatternSensorGraphics.prototype
       *
       * @type {Event}
       * @readonly
       */
      definitionChanged: {
        get: function () {
          return this._definitionChanged
        }
      },

      /**
       * A {@link Property} which returns an array of {@link Spherical} instances representing the sensor's projection.
       * @memberof CustomPatternSensorGraphics.prototype
       * @type {Property}
       */
      directions: createPropertyDescriptor("directions"),

      /**
       * Gets or sets the {@link MaterialProperty} specifying the the sensor's appearance.
       * @memberof CustomPatternSensorGraphics.prototype
       * @type {MaterialProperty}
       */
      lateralSurfaceMaterial: createMaterialPropertyDescriptor("lateralSurfaceMaterial"),

      /**
       * Gets or sets the {@link Color} {@link Property} specifying the color of the line formed by the intersection of the sensor and other central bodies.
       * @memberof CustomPatternSensorGraphics.prototype
       * @type {Property}
       */
      intersectionColor: createPropertyDescriptor("intersectionColor"),

      /**
       * Gets or sets the numeric {@link Property} specifying the width of the line formed by the intersection of the sensor and other central bodies.
       * @memberof CustomPatternSensorGraphics.prototype
       * @type {Property}
       */
      intersectionWidth: createPropertyDescriptor("intersectionWidth"),

      /**
       * Gets or sets the boolean {@link Property} specifying the visibility of the line formed by the intersection of the sensor and other central bodies.
       * @memberof CustomPatternSensorGraphics.prototype
       * @type {Property}
       */
      showIntersection: createPropertyDescriptor("showIntersection"),

      /**
       * Gets or sets the numeric {@link Property} specifying the radius of the sensor's projection.
       * @memberof CustomPatternSensorGraphics.prototype
       * @type {Property}
       */
      radius: createPropertyDescriptor("radius"),

      /**
       * Gets or sets the boolean {@link Property} specifying the visibility of the sensor.
       * @memberof CustomPatternSensorGraphics.prototype
       * @type {Property}
       */
      show: createPropertyDescriptor("show")
    })

    /**
     * Duplicates a CustomPatternSensorGraphics instance.
     *
     * @param {CustomPatternSensorGraphics} [result] The object onto which to store the result.
     * @returns {CustomPatternSensorGraphics} The modified result parameter or a new instance if one was not provided.
     */
    CustomPatternSensorGraphics.prototype.clone = function (result) {
      if (!defined(result)) {
        result = new CustomPatternSensorGraphics()
      }
      result.directions = this.directions
      result.radius = this.radius
      result.show = this.show
      result.showIntersection = this.showIntersection
      result.intersectionColor = this.intersectionColor
      result.intersectionWidth = this.intersectionWidth
      result.lateralSurfaceMaterial = this.lateralSurfaceMaterial
      return result
    }

    /**
     * Assigns each unassigned property on this object to the value
     * of the same property on the provided source object.
     *
     * @param {CustomPatternSensorGraphics} source The object to be merged into this object.
     */
    CustomPatternSensorGraphics.prototype.merge = function (source) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(source)) {
        throw new DeveloperError("source is required.")
      }
      // >>includeEnd('debug');

      this.directions = defaultValue(this.directions, source.directions)
      this.radius = defaultValue(this.radius, source.radius)
      this.show = defaultValue(this.show, source.show)
      this.showIntersection = defaultValue(this.showIntersection, source.showIntersection)
      this.intersectionColor = defaultValue(this.intersectionColor, source.intersectionColor)
      this.intersectionWidth = defaultValue(this.intersectionWidth, source.intersectionWidth)
      this.lateralSurfaceMaterial = defaultValue(this.lateralSurfaceMaterial, source.lateralSurfaceMaterial)
    }

    return CustomPatternSensorGraphics
  })

  define("custom/custom-pattern-sensor-visualizer", [
    "require",
    "Cesium/Core/AssociativeArray",
    "Cesium/Core/Cartesian3",
    "Cesium/Core/Color",
    "Cesium/Core/defined",
    "Cesium/Core/destroyObject",
    "Cesium/Core/DeveloperError",
    "Cesium/Core/Matrix3",
    "Cesium/Core/Matrix4",
    "Cesium/Core/Quaternion",
    "Cesium/DataSources/MaterialProperty",
    "Cesium/DataSources/Property",
    "../custom/custom-sensor-volume",
    "../util/remove-primitive"
  ], function (require) {
    "use strict"

    var AssociativeArray = require("Cesium/Core/AssociativeArray")
    var Cartesian3 = require("Cesium/Core/Cartesian3")
    var Color = require("Cesium/Core/Color")
    var defined = require("Cesium/Core/defined")
    var destroyObject = require("Cesium/Core/destroyObject")
    var DeveloperError = require("Cesium/Core/DeveloperError")
    var Matrix3 = require("Cesium/Core/Matrix3")
    var Matrix4 = require("Cesium/Core/Matrix4")
    var Quaternion = require("Cesium/Core/Quaternion")
    var MaterialProperty = require("Cesium/DataSources/MaterialProperty")
    var Property = require("Cesium/DataSources/Property")

    var CustomSensorVolume = require("../custom/custom-sensor-volume")
    var removePrimitive = require("../util/remove-primitive")

    var defaultIntersectionColor = Color.WHITE
    var defaultIntersectionWidth = 1.0
    var defaultRadius = Number.POSITIVE_INFINITY

    var matrix3Scratch = new Matrix3()
    var cachedPosition = new Cartesian3()
    var cachedOrientation = new Quaternion()

    /**
     * A {@link Visualizer} which maps {@link Entity#customPatternSensor} to a {@link CustomPatternSensor}.
     * @alias CustomPatternSensorVisualizer
     * @constructor
     *
     * @param {Scene} scene The scene the primitives will be rendered in.
     * @param {EntityCollection} entityCollection The entityCollection to visualize.
     */
    var CustomPatternSensorVisualizer = function (scene, entityCollection) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(scene)) {
        throw new DeveloperError("scene is required.")
      }
      if (!defined(entityCollection)) {
        throw new DeveloperError("entityCollection is required.")
      }
      // >>includeEnd('debug');

      entityCollection.collectionChanged.addEventListener(CustomPatternSensorVisualizer.prototype._onCollectionChanged, this)

      this._scene = scene
      this._primitives = scene.primitives
      this._entityCollection = entityCollection
      this._hash = {}
      this._entitiesToVisualize = new AssociativeArray()

      this._onCollectionChanged(entityCollection, entityCollection.values, [], [])
    }

    /**
     * Updates the primitives created by this visualizer to match their
     * Entity counterpart at the given time.
     *
     * @param {JulianDate} time The time to update to.
     * @returns {Boolean} This function always returns true.
     */
    CustomPatternSensorVisualizer.prototype.update = function (time) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(time)) {
        throw new DeveloperError("time is required.")
      }
      // >>includeEnd('debug');

      var entities = this._entitiesToVisualize.values
      var hash = this._hash
      var primitives = this._primitives

      for (var i = 0, len = entities.length; i < len; i++) {
        var entity = entities[i]
        var customPatternSensorGraphics = entity._customPatternSensor

        var position
        var orientation
        var directions
        var data = hash[entity.id]
        var show = entity.isShowing && entity.isAvailable(time) && Property.getValueOrDefault(customPatternSensorGraphics._show, time, true)

        if (show) {
          position = Property.getValueOrUndefined(entity._position, time, cachedPosition)
          orientation = Property.getValueOrUndefined(entity._orientation, time, cachedOrientation)
          directions = Property.getValueOrUndefined(customPatternSensorGraphics._directions, time)
          show = defined(position) && defined(orientation) && defined(directions)
        }

        if (!show) {
          // don't bother creating or updating anything else
          if (defined(data)) {
            data.primitive.show = false
          }
          continue
        }

        var primitive = defined(data) ? data.primitive : undefined
        if (!defined(primitive)) {
          primitive = new CustomSensorVolume()
          primitive.id = entity
          primitives.add(primitive)

          data = {
            primitive: primitive,
            position: undefined,
            orientation: undefined
          }
          hash[entity.id] = data
        }

        if (!Cartesian3.equals(position, data.position) || !Quaternion.equals(orientation, data.orientation)) {
          Matrix4.fromRotationTranslation(Matrix3.fromQuaternion(orientation, matrix3Scratch), position, primitive.modelMatrix)
          data.position = Cartesian3.clone(position, data.position)
          data.orientation = Quaternion.clone(orientation, data.orientation)
        }

        primitive.show = true
        primitive.directions = directions
        primitive.radius = Property.getValueOrDefault(customPatternSensorGraphics._radius, time, defaultRadius)
        primitive.lateralSurfaceMaterial = MaterialProperty.getValue(
          time,
          customPatternSensorGraphics._lateralSurfaceMaterial,
          primitive.lateralSurfaceMaterial
        )
        primitive.intersectionColor = Property.getValueOrClonedDefault(
          customPatternSensorGraphics._intersectionColor,
          time,
          defaultIntersectionColor,
          primitive.intersectionColor
        )
        primitive.intersectionWidth = Property.getValueOrDefault(customPatternSensorGraphics._intersectionWidth, time, defaultIntersectionWidth)
      }
      return true
    }

    /**
     * Returns true if this object was destroyed; otherwise, false.
     *
     * @returns {Boolean} True if this object was destroyed; otherwise, false.
     */
    CustomPatternSensorVisualizer.prototype.isDestroyed = function () {
      return false
    }

    /**
     * Removes and destroys all primitives created by this instance.
     */
    CustomPatternSensorVisualizer.prototype.destroy = function () {
      var entities = this._entitiesToVisualize.values
      var hash = this._hash
      var primitives = this._primitives
      for (var i = entities.length - 1; i > -1; i--) {
        removePrimitive(entities[i], hash, primitives)
      }
      return destroyObject(this)
    }

    /**
     * @private
     */
    CustomPatternSensorVisualizer.prototype._onCollectionChanged = function (entityCollection, added, removed, changed) {
      var i
      var entity
      var entities = this._entitiesToVisualize
      var hash = this._hash
      var primitives = this._primitives

      for (i = added.length - 1; i > -1; i--) {
        entity = added[i]
        if (defined(entity._customPatternSensor) && defined(entity._position) && defined(entity._orientation)) {
          entities.set(entity.id, entity)
        }
      }

      for (i = changed.length - 1; i > -1; i--) {
        entity = changed[i]
        if (defined(entity._customPatternSensor) && defined(entity._position) && defined(entity._orientation)) {
          entities.set(entity.id, entity)
        } else {
          removePrimitive(entity, hash, primitives)
          entities.remove(entity.id)
        }
      }

      for (i = removed.length - 1; i > -1; i--) {
        entity = removed[i]
        removePrimitive(entity, hash, primitives)
        entities.remove(entity.id)
      }
    }

    return CustomPatternSensorVisualizer
  })

  define("rectangular/rectangular-sensor-graphics", [
    "require",
    "Cesium/Core/defaultValue",
    "Cesium/Core/defined",
    "Cesium/Core/DeveloperError",
    "Cesium/Core/Event",
    "Cesium/DataSources/createPropertyDescriptor"
  ], function (require) {
    "use strict"

    var defaultValue = require("Cesium/Core/defaultValue")
    var defined = require("Cesium/Core/defined")
    var defineProperties = Object.defineProperties
    var DeveloperError = require("Cesium/Core/DeveloperError")
    var Event = require("Cesium/Core/Event")

    var createPropertyDescriptor = require("Cesium/DataSources/createPropertyDescriptor")

    /**
     * An optionally time-dynamic pyramid.
     *
     * @alias RectangularSensorGraphics
     * @constructor
     */
    var RectangularSensorGraphics = function () {
      this._xHalfAngle = undefined
      this._xHalfAngleSubscription = undefined
      this._yHalfAngle = undefined
      this._yHalfAngleSubscription = undefined

      this._lateralSurfaceMaterial = undefined
      this._lateralSurfaceMaterialSubscription = undefined

      this._intersectionColor = undefined
      this._intersectionColorSubscription = undefined
      this._intersectionWidth = undefined
      this._intersectionWidthSubscription = undefined
      this._showIntersection = undefined
      this._showIntersectionSubscription = undefined
      this._radius = undefined
      this._radiusSubscription = undefined
      this._show = undefined
      this._showSubscription = undefined
      this._definitionChanged = new Event()
    }

    defineProperties(RectangularSensorGraphics.prototype, {
      /**
       * Gets the event that is raised whenever a new property is assigned.
       * @memberof RectangularSensorGraphics.prototype
       *
       * @type {Event}
       * @readonly
       */
      definitionChanged: {
        get: function () {
          return this._definitionChanged
        }
      },

      /**
       * A {@link Property} which returns an array of {@link Spherical} instances representing the pyramid's projection.
       * @memberof RectangularSensorGraphics.prototype
       * @type {Property}
       */
      xHalfAngle: createPropertyDescriptor("xHalfAngle"),

      /**
       * A {@link Property} which returns an array of {@link Spherical} instances representing the pyramid's projection.
       * @memberof RectangularSensorGraphics.prototype
       * @type {Property}
       */
      yHalfAngle: createPropertyDescriptor("yHalfAngle"),

      /**
       * Gets or sets the {@link MaterialProperty} specifying the the pyramid's appearance.
       * @memberof RectangularSensorGraphics.prototype
       * @type {MaterialProperty}
       */
      lateralSurfaceMaterial: createPropertyDescriptor("lateralSurfaceMaterial"),

      /**
       * Gets or sets the {@link Color} {@link Property} specifying the color of the line formed by the intersection of the pyramid and other central bodies.
       * @memberof RectangularSensorGraphics.prototype
       * @type {Property}
       */
      intersectionColor: createPropertyDescriptor("intersectionColor"),

      /**
       * Gets or sets the numeric {@link Property} specifying the width of the line formed by the intersection of the pyramid and other central bodies.
       * @memberof RectangularSensorGraphics.prototype
       * @type {Property}
       */
      intersectionWidth: createPropertyDescriptor("intersectionWidth"),

      /**
       * Gets or sets the boolean {@link Property} specifying the visibility of the line formed by the intersection of the pyramid and other central bodies.
       * @memberof RectangularSensorGraphics.prototype
       * @type {Property}
       */
      showIntersection: createPropertyDescriptor("showIntersection"),

      /**
       * Gets or sets the numeric {@link Property} specifying the radius of the pyramid's projection.
       * @memberof RectangularSensorGraphics.prototype
       * @type {Property}
       */
      radius: createPropertyDescriptor("radius"),

      /**
       * Gets or sets the boolean {@link Property} specifying the visibility of the pyramid.
       * @memberof RectangularSensorGraphics.prototype
       * @type {Property}
       */
      show: createPropertyDescriptor("show")
    })

    /**
     * Duplicates a RectangularSensorGraphics instance.
     *
     * @param {RectangularSensorGraphics} [result] The object onto which to store the result.
     * @returns {RectangularSensorGraphics} The modified result parameter or a new instance if one was not provided.
     */
    RectangularSensorGraphics.prototype.clone = function (result) {
      if (!defined(result)) {
        result = new RectangularSensorGraphics()
      }
      result.xHalfAngle = this.xHalfAngle
      result.yHalfAngle = this.yHalfAngle
      result.radius = this.radius
      result.show = this.show
      result.showIntersection = this.showIntersection
      result.intersectionColor = this.intersectionColor
      result.intersectionWidth = this.intersectionWidth
      result.lateralSurfaceMaterial = this.lateralSurfaceMaterial
      return result
    }

    /**
     * Assigns each unassigned property on this object to the value
     * of the same property on the provided source object.
     *
     * @param {RectangularSensorGraphics} source The object to be merged into this object.
     */
    RectangularSensorGraphics.prototype.merge = function (source) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(source)) {
        throw new DeveloperError("source is required.")
      }
      // >>includeEnd('debug');

      this.xHalfAngle = defaultValue(this.xHalfAngle, source.xHalfAngle)
      this.yHalfAngle = defaultValue(this.yHalfAngle, source.yHalfAngle)
      this.radius = defaultValue(this.radius, source.radius)
      this.show = defaultValue(this.show, source.show)
      this.showIntersection = defaultValue(this.showIntersection, source.showIntersection)
      this.intersectionColor = defaultValue(this.intersectionColor, source.intersectionColor)
      this.intersectionWidth = defaultValue(this.intersectionWidth, source.intersectionWidth)
      this.lateralSurfaceMaterial = defaultValue(this.lateralSurfaceMaterial, source.lateralSurfaceMaterial)
    }

    return RectangularSensorGraphics
  })

  define("rectangular/rectangular-pyramid-sensor-volume", [
    "require",
    "Cesium/Core/clone",
    "Cesium/Core/defaultValue",
    "Cesium/Core/defined",
    "Cesium/Core/destroyObject",
    "Cesium/Core/DeveloperError",
    "Cesium/Core/Math",
    "Cesium/Core/Spherical",
    "../custom/custom-sensor-volume"
  ], function (require) {
    "use strict"

    var clone = require("Cesium/Core/clone")
    var defaultValue = require("Cesium/Core/defaultValue")
    var defined = require("Cesium/Core/defined")
    var defineProperties = Object.defineProperties
    var destroyObject = require("Cesium/Core/destroyObject")
    var DeveloperError = require("Cesium/Core/DeveloperError")
    var CesiumMath = require("Cesium/Core/Math")
    var Spherical = require("Cesium/Core/Spherical")

    var CustomSensorVolume = require("../custom/custom-sensor-volume")

    function assignSpherical(index, array, clock, cone) {
      var spherical = array[index]
      if (!defined(spherical)) {
        spherical = new Spherical()
        array[index] = spherical
      }
      spherical.clock = clock
      spherical.cone = cone
      spherical.magnitude = 1.0
    }

    function updateDirections(rectangularSensor) {
      var directions = rectangularSensor._customSensor.directions

      // At 90 degrees the sensor is completely open, and tan() goes to infinity.
      var tanX = Math.tan(Math.min(rectangularSensor._xHalfAngle, CesiumMath.toRadians(89.0)))
      var tanY = Math.tan(Math.min(rectangularSensor._yHalfAngle, CesiumMath.toRadians(89.0)))
      var theta = Math.atan(tanX / tanY)
      var cone = Math.atan(Math.sqrt(tanX * tanX + tanY * tanY))

      assignSpherical(0, directions, theta, cone)
      assignSpherical(1, directions, CesiumMath.toRadians(180.0) - theta, cone)
      assignSpherical(2, directions, CesiumMath.toRadians(180.0) + theta, cone)
      assignSpherical(3, directions, -theta, cone)

      directions.length = 4
      rectangularSensor._customSensor.directions = directions
    }

    var RectangularPyramidSensorVolume = function (options) {
      options = defaultValue(options, defaultValue.EMPTY_OBJECT)

      var customSensorOptions = clone(options)
      customSensorOptions._pickPrimitive = defaultValue(options._pickPrimitive, this)
      customSensorOptions.directions = undefined
      this._customSensor = new CustomSensorVolume(customSensorOptions)

      this._xHalfAngle = defaultValue(options.xHalfAngle, CesiumMath.PI_OVER_TWO)
      this._yHalfAngle = defaultValue(options.yHalfAngle, CesiumMath.PI_OVER_TWO)

      updateDirections(this)
    }

    defineProperties(RectangularPyramidSensorVolume.prototype, {
      xHalfAngle: {
        get: function () {
          return this._xHalfAngle
        },
        set: function (value) {
          // >>includeStart('debug', pragmas.debug)
          if (value > CesiumMath.PI_OVER_TWO) {
            throw new DeveloperError("xHalfAngle must be less than or equal to 90 degrees.")
          }
          // >>includeEnd('debug');

          if (this._xHalfAngle !== value) {
            this._xHalfAngle = value
            updateDirections(this)
          }
        }
      },
      yHalfAngle: {
        get: function () {
          return this._yHalfAngle
        },
        set: function (value) {
          // >>includeStart('debug', pragmas.debug)
          if (value > CesiumMath.PI_OVER_TWO) {
            throw new DeveloperError("yHalfAngle must be less than or equal to 90 degrees.")
          }
          // >>includeEnd('debug');

          if (this._yHalfAngle !== value) {
            this._yHalfAngle = value
            updateDirections(this)
          }
        }
      },
      show: {
        get: function () {
          return this._customSensor.show
        },
        set: function (value) {
          this._customSensor.show = value
        }
      },
      showIntersection: {
        get: function () {
          return this._customSensor.showIntersection
        },
        set: function (value) {
          this._customSensor.showIntersection = value
        }
      },
      showThroughEllipsoid: {
        get: function () {
          return this._customSensor.showThroughEllipsoid
        },
        set: function (value) {
          this._customSensor.showThroughEllipsoid = value
        }
      },
      modelMatrix: {
        get: function () {
          return this._customSensor.modelMatrix
        },
        set: function (value) {
          this._customSensor.modelMatrix = value
        }
      },
      radius: {
        get: function () {
          return this._customSensor.radius
        },
        set: function (value) {
          this._customSensor.radius = value
        }
      },
      lateralSurfaceMaterial: {
        get: function () {
          return this._customSensor.lateralSurfaceMaterial
        },
        set: function (value) {
          this._customSensor.lateralSurfaceMaterial = value
        }
      },
      intersectionColor: {
        get: function () {
          return this._customSensor.intersectionColor
        },
        set: function (value) {
          this._customSensor.intersectionColor = value
        }
      },
      intersectionWidth: {
        get: function () {
          return this._customSensor.intersectionWidth
        },
        set: function (value) {
          this._customSensor.intersectionWidth = value
        }
      },
      id: {
        get: function () {
          return this._customSensor.id
        },
        set: function (value) {
          this._customSensor.id = value
        }
      }
    })

    RectangularPyramidSensorVolume.prototype.update = function (frameState) {
      this._customSensor.update(frameState)
    }

    RectangularPyramidSensorVolume.prototype.isDestroyed = function () {
      return false
    }

    RectangularPyramidSensorVolume.prototype.destroy = function () {
      this._customSensor = this._customSensor && this._customSensor.destroy()
      return destroyObject(this)
    }

    return RectangularPyramidSensorVolume
  })

  define("rectangular/rectangular-sensor-visualizer", [
    "require",
    "Cesium/Core/AssociativeArray",
    "Cesium/Core/Cartesian3",
    "Cesium/Core/Color",
    "Cesium/Core/defined",
    "Cesium/Core/destroyObject",
    "Cesium/Core/DeveloperError",
    "Cesium/Core/Math",
    "Cesium/Core/Matrix3",
    "Cesium/Core/Matrix4",
    "Cesium/Core/Quaternion",
    "Cesium/DataSources/MaterialProperty",
    "Cesium/DataSources/Property",
    "./rectangular-pyramid-sensor-volume",
    "../util/remove-primitive"
  ], function (require) {
    "use strict"

    var AssociativeArray = require("Cesium/Core/AssociativeArray")
    var Cartesian3 = require("Cesium/Core/Cartesian3")
    var Color = require("Cesium/Core/Color")
    var defined = require("Cesium/Core/defined")
    var destroyObject = require("Cesium/Core/destroyObject")
    var DeveloperError = require("Cesium/Core/DeveloperError")
    var CesiumMath = require("Cesium/Core/Math")
    var Matrix3 = require("Cesium/Core/Matrix3")
    var Matrix4 = require("Cesium/Core/Matrix4")
    var Quaternion = require("Cesium/Core/Quaternion")
    var MaterialProperty = require("Cesium/DataSources/MaterialProperty")
    var Property = require("Cesium/DataSources/Property")

    var RectangularPyramidSensorVolume = require("./rectangular-pyramid-sensor-volume")
    var removePrimitive = require("../util/remove-primitive")

    var defaultIntersectionColor = Color.WHITE
    var defaultIntersectionWidth = 1.0
    var defaultRadius = Number.POSITIVE_INFINITY

    var matrix3Scratch = new Matrix3()
    var cachedPosition = new Cartesian3()
    var cachedOrientation = new Quaternion()

    /**
     * A {@link Visualizer} which maps {@link Entity#rectangularSensor} to a {@link RectangularSensor}.
     * @alias RectangularSensorVisualizer
     * @constructor
     *
     * @param {Scene} scene The scene the primitives will be rendered in.
     * @param {EntityCollection} entityCollection The entityCollection to visualize.
     */
    var RectangularSensorVisualizer = function (scene, entityCollection) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(scene)) {
        throw new DeveloperError("scene is required.")
      }
      if (!defined(entityCollection)) {
        throw new DeveloperError("entityCollection is required.")
      }
      // >>includeEnd('debug');

      entityCollection.collectionChanged.addEventListener(RectangularSensorVisualizer.prototype._onCollectionChanged, this)

      this._scene = scene
      this._primitives = scene.primitives
      this._entityCollection = entityCollection
      this._hash = {}
      this._entitiesToVisualize = new AssociativeArray()

      this._onCollectionChanged(entityCollection, entityCollection.values, [], [])
    }

    /**
     * Updates the primitives created by this visualizer to match their
     * Entity counterpart at the given time.
     *
     * @param {JulianDate} time The time to update to.
     * @returns {Boolean} This function always returns true.
     */
    RectangularSensorVisualizer.prototype.update = function (time) {
      // >>includeStart('debug', pragmas.debug);
      if (!defined(time)) {
        throw new DeveloperError("time is required.")
      }
      // >>includeEnd('debug');

      var entities = this._entitiesToVisualize.values
      var hash = this._hash
      var primitives = this._primitives

      for (var i = 0, len = entities.length; i < len; i++) {
        var entity = entities[i]
        var rectangularSensorGraphics = entity._rectangularSensorVoumes

        var position
        var orientation
        var data = hash[entity.id]
        var show = entity.isShowing && entity.isAvailable(time) && Property.getValueOrDefault(rectangularSensorGraphics._show, time, true)

        if (show) {
          position = Property.getValueOrUndefined(entity._position, time, cachedPosition)
          orientation = Property.getValueOrUndefined(entity._orientation, time, cachedOrientation)
          show = defined(position) && defined(orientation)
        }

        if (!show) {
          // don't bother creating or updating anything else
          if (defined(data)) {
            data.primitive.show = false
          }
          continue
        }

        var primitive = defined(data) ? data.primitive : undefined
        if (!defined(primitive)) {
          primitive = new RectangularPyramidSensorVolume()
          primitive.id = entity
          primitives.add(primitive)

          data = {
            primitive: primitive,
            position: undefined,
            orientation: undefined
          }
          hash[entity.id] = data
        }

        if (!Cartesian3.equals(position, data.position) || !Quaternion.equals(orientation, data.orientation)) {
          Matrix4.fromRotationTranslation(Matrix3.fromQuaternion(orientation, matrix3Scratch), position, primitive.modelMatrix)
          data.position = Cartesian3.clone(position, data.position)
          data.orientation = Quaternion.clone(orientation, data.orientation)
        }

        primitive.show = true
        primitive.xHalfAngle = Property.getValueOrDefault(rectangularSensorGraphics._xHalfAngle, time, CesiumMath.PI_OVER_TWO)
        primitive.yHalfAngle = Property.getValueOrDefault(rectangularSensorGraphics._yHalfAngle, time, CesiumMath.PI_OVER_TWO)
        primitive.radius = Property.getValueOrDefault(rectangularSensorGraphics._radius, time, defaultRadius)
        primitive.lateralSurfaceMaterial = MaterialProperty.getValue(
          time,
          rectangularSensorGraphics._lateralSurfaceMaterial,
          primitive.lateralSurfaceMaterial
        )
        primitive.intersectionColor = Property.getValueOrClonedDefault(
          rectangularSensorGraphics._intersectionColor,
          time,
          defaultIntersectionColor,
          primitive.intersectionColor
        )
        primitive.intersectionWidth = Property.getValueOrDefault(rectangularSensorGraphics._intersectionWidth, time, defaultIntersectionWidth)
      }
      return true
    }

    /**
     * Returns true if this object was destroyed; otherwise, false.
     *
     * @returns {Boolean} True if this object was destroyed; otherwise, false.
     */
    RectangularSensorVisualizer.prototype.isDestroyed = function () {
      return false
    }

    /**
     * Removes and destroys all primitives created by this instance.
     */
    RectangularSensorVisualizer.prototype.destroy = function () {
      var entities = this._entitiesToVisualize.values
      var hash = this._hash
      var primitives = this._primitives
      for (var i = entities.length - 1; i > -1; i--) {
        removePrimitive(entities[i], hash, primitives)
      }
      return destroyObject(this)
    }

    /**
     * @private
     */
    RectangularSensorVisualizer.prototype._onCollectionChanged = function (entityCollection, added, removed, changed) {
      var i
      var entity
      var entities = this._entitiesToVisualize
      var hash = this._hash
      var primitives = this._primitives

      for (i = added.length - 1; i > -1; i--) {
        entity = added[i]
        if (defined(entity._rectangularSensorVoumes) && defined(entity._position) && defined(entity._orientation)) {
          entities.set(entity.id, entity)
        }
      }

      for (i = changed.length - 1; i > -1; i--) {
        entity = changed[i]
        if (defined(entity._rectangularSensorVoumes) && defined(entity._position) && defined(entity._orientation)) {
          entities.set(entity.id, entity)
        } else {
          removePrimitive(entity, hash, primitives)
          entities.remove(entity.id)
        }
      }

      for (i = removed.length - 1; i > -1; i--) {
        entity = removed[i]
        removePrimitive(entity, hash, primitives)
        entities.remove(entity.id)
      }
    }

    return RectangularSensorVisualizer
  })

  define("initialize", [
    "require",
    "Cesium/Core/Cartesian3",
    "Cesium/Core/Color",
    "Cesium/Core/defined",
    "Cesium/Core/Spherical",
    "Cesium/Core/TimeInterval",
    "Cesium/DataSources/CzmlDataSource",
    "Cesium/DataSources/DataSourceDisplay",
    "./conic/conic-sensor-graphics",
    "./conic/conic-sensor-visualizer",
    "./custom/custom-pattern-sensor-graphics",
    "./custom/custom-pattern-sensor-visualizer",
    "./rectangular/rectangular-sensor-graphics",
    "./rectangular/rectangular-sensor-visualizer"
  ], function (require) {
    "use strict"

    var Cartesian3 = require("Cesium/Core/Cartesian3")
    var Color = require("Cesium/Core/Color")
    var defined = require("Cesium/Core/defined")
    var Spherical = require("Cesium/Core/Spherical")
    var TimeInterval = require("Cesium/Core/TimeInterval")

    var CzmlDataSource = require("Cesium/DataSources/CzmlDataSource")
    var DataSourceDisplay = require("Cesium/DataSources/DataSourceDisplay")

    var ConicSensorGraphics = require("./conic/conic-sensor-graphics")
    var ConicSensorVisualizer = require("./conic/conic-sensor-visualizer")
    var CustomPatternSensorGraphics = require("./custom/custom-pattern-sensor-graphics")
    var CustomPatternSensorVisualizer = require("./custom/custom-pattern-sensor-visualizer")
    var RectangularSensorGraphics = require("./rectangular/rectangular-sensor-graphics")
    var RectangularSensorVisualizer = require("./rectangular/rectangular-sensor-visualizer")

    var processPacketData = CzmlDataSource.processPacketData
    var processMaterialPacketData = CzmlDataSource.processMaterialPacketData

    function processDirectionData(customPatternSensor, directions, interval, sourceUri, entityCollection) {
      var i
      var len
      var values = []
      var unitSphericals = directions.unitSpherical
      var sphericals = directions.spherical
      var unitCartesians = directions.unitCartesian
      var cartesians = directions.cartesian

      if (defined(unitSphericals)) {
        for (i = 0, len = unitSphericals.length; i < len; i += 2) {
          values.push(new Spherical(unitSphericals[i], unitSphericals[i + 1]))
        }
        directions.array = values
      } else if (defined(sphericals)) {
        for (i = 0, len = sphericals.length; i < len; i += 3) {
          values.push(new Spherical(sphericals[i], sphericals[i + 1], sphericals[i + 2]))
        }
        directions.array = values
      } else if (defined(unitCartesians)) {
        for (i = 0, len = unitCartesians.length; i < len; i += 3) {
          var tmp = Spherical.fromCartesian3(new Cartesian3(unitCartesians[i], unitCartesians[i + 1], unitCartesians[i + 2]))
          Spherical.normalize(tmp, tmp)
          values.push(tmp)
        }
        directions.array = values
      } else if (defined(cartesians)) {
        for (i = 0, len = cartesians.length; i < len; i += 3) {
          values.push(Spherical.fromCartesian3(new Cartesian3(cartesians[i], cartesians[i + 1], cartesians[i + 2])))
        }
        directions.array = values
      }
      processPacketData(Array, customPatternSensor, "directions", directions, interval, sourceUri, entityCollection)
    }

    function processCommonSensorProperties(sensor, sensorData, interval, sourceUri, entityCollection) {
      processPacketData(Boolean, sensor, "show", sensorData.show, interval, sourceUri, entityCollection)
      processPacketData(Number, sensor, "radius", sensorData.radius, interval, sourceUri, entityCollection)
      processPacketData(Boolean, sensor, "showIntersection", sensorData.showIntersection, interval, sourceUri, entityCollection)
      processPacketData(Color, sensor, "intersectionColor", sensorData.intersectionColor, interval, sourceUri, entityCollection)
      processPacketData(Number, sensor, "intersectionWidth", sensorData.intersectionWidth, interval, sourceUri, entityCollection)
      processMaterialPacketData(sensor, "lateralSurfaceMaterial", sensorData.lateralSurfaceMaterial, interval, sourceUri, entityCollection)
    }

    var iso8601Scratch = {
      iso8601: undefined
    }

    function processConicSensor(entity, packet, entityCollection, sourceUri) {
      var conicSensorData = packet.agi_conicSensor
      if (!defined(conicSensorData)) {
        return
      }

      var interval
      var intervalString = conicSensorData.interval
      if (defined(intervalString)) {
        iso8601Scratch.iso8601 = intervalString
        interval = TimeInterval.fromIso8601(iso8601Scratch)
      }

      var conicSensor = entity.conicSensor
      if (!defined(conicSensor)) {
        entity.addProperty("conicSensor")
        conicSensor = new ConicSensorGraphics()
        entity.conicSensor = conicSensor
      }

      processCommonSensorProperties(conicSensor, conicSensorData, interval, sourceUri, entityCollection)
      processPacketData(Number, conicSensor, "innerHalfAngle", conicSensorData.innerHalfAngle, interval, sourceUri, entityCollection)
      processPacketData(Number, conicSensor, "outerHalfAngle", conicSensorData.outerHalfAngle, interval, sourceUri, entityCollection)
      processPacketData(Number, conicSensor, "minimumClockAngle", conicSensorData.minimumClockAngle, interval, sourceUri, entityCollection)
      processPacketData(Number, conicSensor, "maximumClockAngle", conicSensorData.maximumClockAngle, interval, sourceUri, entityCollection)
    }

    function processCustomPatternSensor(entity, packet, entityCollection, sourceUri) {
      var customPatternSensorData = packet.agi_customPatternSensor
      if (!defined(customPatternSensorData)) {
        return
      }

      var interval
      var intervalString = customPatternSensorData.interval
      if (defined(intervalString)) {
        iso8601Scratch.iso8601 = intervalString
        interval = TimeInterval.fromIso8601(iso8601Scratch)
      }

      var customPatternSensor = entity.customPatternSensor
      if (!defined(customPatternSensor)) {
        entity.addProperty("customPatternSensor")
        customPatternSensor = new CustomPatternSensorGraphics()
        entity.customPatternSensor = customPatternSensor
      }

      processCommonSensorProperties(customPatternSensor, customPatternSensorData, interval, sourceUri, entityCollection)

      // The directions property is a special case value that can be an array of unitSpherical or unit Cartesians.
      // We pre-process this into Spherical instances and then process it like any other array.
      var directions = customPatternSensorData.directions
      if (defined(directions)) {
        if (Array.isArray(directions)) {
          var length = directions.length
          for (var i = 0; i < length; i++) {
            processDirectionData(customPatternSensor, directions[i], interval, sourceUri, entityCollection)
          }
        } else {
          processDirectionData(customPatternSensor, directions, interval, sourceUri, entityCollection)
        }
      }
    }

    function processRectangularSensor(entity, packet, entityCollection, sourceUri) {
      var rectangularSensorData = packet.agi_rectangularSensor
      if (!defined(rectangularSensorData)) {
        return
      }

      var interval
      var intervalString = rectangularSensorData.interval
      if (defined(intervalString)) {
        iso8601Scratch.iso8601 = intervalString
        interval = TimeInterval.fromIso8601(iso8601Scratch)
      }

      var rectangularSensorVoumes = entity.rectangularSensorVoumes
      if (!defined(rectangularSensorVoumes)) {
        entity.addProperty("rectangularSensorVoumes")
        rectangularSensorVoumes = new RectangularSensorGraphics()
        entity.rectangularSensorVoumes = rectangularSensorVoumes
      }

      processCommonSensorProperties(rectangularSensorVoumes, rectangularSensorData, interval, sourceUri, entityCollection)
      processPacketData(Number, rectangularSensorVoumes, "xHalfAngle", rectangularSensorData.xHalfAngle, interval, sourceUri, entityCollection)
      processPacketData(Number, rectangularSensorVoumes, "yHalfAngle", rectangularSensorData.yHalfAngle, interval, sourceUri, entityCollection)
    }

    var initialized = false
    return function initialize() {
      if (initialized) {
        return
      }

      CzmlDataSource.updaters.push(processConicSensor, processCustomPatternSensor, processRectangularSensor)

      var originalDefaultVisualizersCallback = DataSourceDisplay.defaultVisualizersCallback
      DataSourceDisplay.defaultVisualizersCallback = function (scene, entityCluster, dataSource) {
        var entities = dataSource.entities
        var array = originalDefaultVisualizersCallback(scene, entityCluster, dataSource)
        return array.concat([
          new ConicSensorVisualizer(scene, entities),
          new CustomPatternSensorVisualizer(scene, entities),
          new RectangularSensorVisualizer(scene, entities)
        ])
      }

      initialized = true
    }
  })

  define("cesium-sensor-volumes", [
    "require",
    "./initialize",
    "./conic/conic-sensor-graphics",
    "./conic/conic-sensor-visualizer",
    "./custom/custom-pattern-sensor-graphics",
    "./custom/custom-pattern-sensor-visualizer",
    "./custom/custom-sensor-volume",
    "./rectangular/rectangular-pyramid-sensor-volume",
    "./rectangular/rectangular-sensor-graphics",
    "./rectangular/rectangular-sensor-visualizer"
  ], function (require) {
    "use strict"

    var initialize = require("./initialize")
    var ConicSensorGraphics = require("./conic/conic-sensor-graphics")
    var ConicSensorVisualizer = require("./conic/conic-sensor-visualizer")
    var CustomPatternSensorGraphics = require("./custom/custom-pattern-sensor-graphics")
    var CustomPatternSensorVisualizer = require("./custom/custom-pattern-sensor-visualizer")
    var CustomSensorVolume = require("./custom/custom-sensor-volume")
    var RectangularPyramidSensorVolume = require("./rectangular/rectangular-pyramid-sensor-volume")
    var RectangularSensorGraphics = require("./rectangular/rectangular-sensor-graphics")
    var RectangularSensorVisualizer = require("./rectangular/rectangular-sensor-visualizer")

    initialize()

    return {
      ConicSensorGraphics: ConicSensorGraphics,
      ConicSensorVisualizer: ConicSensorVisualizer,
      CustomPatternSensorGraphics: CustomPatternSensorGraphics,
      CustomPatternSensorVisualizer: CustomPatternSensorVisualizer,
      CustomSensorVolume: CustomSensorVolume,
      RectangularPyramidSensorVolume: RectangularPyramidSensorVolume,
      RectangularSensorGraphics: RectangularSensorGraphics,
      RectangularSensorVisualizer: RectangularSensorVisualizer
    }
  })

  ;("use strict")
  /* global Cesium */
  define("Cesium/Core/Cartesian3", function () {
    return Cesium["Cartesian3"]
  })
  define("Cesium/Core/Color", function () {
    return Cesium["Color"]
  })
  define("Cesium/Core/defined", function () {
    return Cesium["defined"]
  })
  define("Cesium/Core/Spherical", function () {
    return Cesium["Spherical"]
  })
  define("Cesium/Core/TimeInterval", function () {
    return Cesium["TimeInterval"]
  })
  define("Cesium/DataSources/CzmlDataSource", function () {
    return Cesium["CzmlDataSource"]
  })
  define("Cesium/DataSources/DataSourceDisplay", function () {
    return Cesium["DataSourceDisplay"]
  })
  define("Cesium/Core/defaultValue", function () {
    return Cesium["defaultValue"]
  })
  define("Cesium/Core/DeveloperError", function () {
    return Cesium["DeveloperError"]
  })
  define("Cesium/Core/Event", function () {
    return Cesium["Event"]
  })
  define("Cesium/DataSources/createMaterialPropertyDescriptor", function () {
    return Cesium["createMaterialPropertyDescriptor"]
  })
  define("Cesium/DataSources/createPropertyDescriptor", function () {
    return Cesium["createPropertyDescriptor"]
  })
  define("Cesium/Core/AssociativeArray", function () {
    return Cesium["AssociativeArray"]
  })
  define("Cesium/Core/destroyObject", function () {
    return Cesium["destroyObject"]
  })
  define("Cesium/Core/Math", function () {
    return Cesium["Math"]
  })
  define("Cesium/Core/Matrix3", function () {
    return Cesium["Matrix3"]
  })
  define("Cesium/Core/Matrix4", function () {
    return Cesium["Matrix4"]
  })
  define("Cesium/Core/Quaternion", function () {
    return Cesium["Quaternion"]
  })
  define("Cesium/DataSources/MaterialProperty", function () {
    return Cesium["MaterialProperty"]
  })
  define("Cesium/DataSources/Property", function () {
    return Cesium["Property"]
  })
  define("Cesium/Core/BoundingSphere", function () {
    return Cesium["BoundingSphere"]
  })
  define("Cesium/Core/combine", function () {
    return Cesium["combine"]
  })
  define("Cesium/Core/ComponentDatatype", function () {
    return Cesium["ComponentDatatype"]
  })
  define("Cesium/Core/PrimitiveType", function () {
    return Cesium["PrimitiveType"]
  })
  define("Cesium/Renderer/Buffer", function () {
    return Cesium["Buffer"]
  })
  define("Cesium/Renderer/BufferUsage", function () {
    return Cesium["BufferUsage"]
  })
  define("Cesium/Renderer/DrawCommand", function () {
    return Cesium["DrawCommand"]
  })
  define("Cesium/Renderer/Pass", function () {
    return Cesium["Pass"]
  })
  define("Cesium/Renderer/RenderState", function () {
    return Cesium["RenderState"]
  })
  define("Cesium/Renderer/ShaderProgram", function () {
    return Cesium["ShaderProgram"]
  })
  define("Cesium/Renderer/ShaderSource", function () {
    return Cesium["ShaderSource"]
  })
  define("Cesium/Renderer/VertexArray", function () {
    return Cesium["VertexArray"]
  })
  define("Cesium/Scene/BlendingState", function () {
    return Cesium["BlendingState"]
  })
  define("Cesium/Scene/CullFace", function () {
    return Cesium["CullFace"]
  })
  define("Cesium/Scene/Material", function () {
    return Cesium["Material"]
  })
  define("Cesium/Scene/SceneMode", function () {
    return Cesium["SceneMode"]
  })
  define("Cesium/Core/clone", function () {
    return Cesium["clone"]
  })
  // eslint-disable-next-line import/no-dynamic-require
  require(["cesium-sensor-volumes"], function (CesiumSensorVolumes) {
    "use strict"
    /* global window, self */

    var scope
    if (typeof window === "undefined") {
      if (typeof self === "undefined") {
        scope = {}
      } else {
        scope = self
      }
    } else {
      scope = window
    }

    scope.CesiumSensorVolumes = CesiumSensorVolumes
  }, undefined, true)
})()