text: import AssociativeArray from '../Core/AssociativeArray.js';
  import defined from '../Core/defined.js';
  import DistanceDisplayCondition from '../Core/DistanceDisplayCondition.js';
  import DistanceDisplayConditionGeometryInstanceAttribute from '../Core/DistanceDisplayConditionGeometryInstanceAttribute.js';
  import RectangleCollisionChecker from '../Core/RectangleCollisionChecker.js';
  import ShowGeometryInstanceAttribute from '../Core/ShowGeometryInstanceAttribute.js';
  import GroundPrimitive from '../Scene/GroundPrimitive.js';
  import ShadowVolumeAppearance from '../Scene/ShadowVolumeAppearance.js';
  import BoundingSphereState from './BoundingSphereState.js';
  import ColorMaterialProperty from './ColorMaterialProperty.js';
  import MaterialProperty from './MaterialProperty.js';
  import Property from './Property.js';
  
      var distanceDisplayConditionScratch = new DistanceDisplayCondition();
      var defaultDistanceDisplayCondition = new DistanceDisplayCondition();
  
      // Encapsulates a Primitive and all the entities that it represents.
      function Batch(primitives, classificationType, appearanceType, materialProperty, usingSphericalTextureCoordinates, zIndex) {
          this.primitives = primitives; // scene level primitive collection
          this.classificationType = classificationType;
          this.appearanceType = appearanceType;
          this.materialProperty = materialProperty;
          this.updaters = new AssociativeArray();
          this.createPrimitive = true;
          this.primitive = undefined; // a GroundPrimitive encapsulating all the entities
          this.oldPrimitive = undefined;
          this.geometry = new AssociativeArray();
          this.material = undefined;
          this.updatersWithAttributes = new AssociativeArray();
          this.attributes = new AssociativeArray();
          this.invalidated = false;
          this.removeMaterialSubscription = materialProperty.definitionChanged.addEventListener(Batch.prototype.onMaterialChanged, this);
          this.subscriptions = new AssociativeArray();
          this.showsUpdated = new AssociativeArray();
          this.usingSphericalTextureCoordinates = usingSphericalTextureCoordinates;
          this.zIndex = zIndex;
          this.rectangleCollisionCheck = new RectangleCollisionChecker();
      }
  
      Batch.prototype.onMaterialChanged = function() {
          this.invalidated = true;
      };
  
      Batch.prototype.overlapping = function(rectangle) {
          return this.rectangleCollisionCheck.collides(rectangle);
      };
  
      // Check if the given updater's material is compatible with this batch
      Batch.prototype.isMaterial = function(updater) {
          var material = this.materialProperty;
          var updaterMaterial = updater.fillMaterialProperty;
  
          if (updaterMaterial === material ||
              (updaterMaterial instanceof ColorMaterialProperty && material instanceof ColorMaterialProperty)) {
              return true;
          }
          return defined(material) && material.equals(updaterMaterial);
      };
  
      Batch.prototype.add = function(time, updater, geometryInstance) {
          var id = updater.id;
          this.updaters.set(id, updater);
          this.geometry.set(id, geometryInstance);
          this.rectangleCollisionCheck.insert(id, geometryInstance.geometry.rectangle);
          // Updaters with dynamic attributes must be tracked separately, may exit the batch
          if (!updater.hasConstantFill || !updater.fillMaterialProperty.isConstant || !Property.isConstant(updater.distanceDisplayConditionProperty)) {
              this.updatersWithAttributes.set(id, updater);
          } else {
              var that = this;
              // Listen for show changes. These will be synchronized in updateShows.
              this.subscriptions.set(id, updater.entity.definitionChanged.addEventListener(function(entity, propertyName, newValue, oldValue) {
                  if (propertyName === 'isShowing') {
                      that.showsUpdated.set(updater.id, updater);
                  }
              }));
          }
          this.createPrimitive = true;
      };
  
      Batch.prototype.remove = function(updater) {
          var id = updater.id;
          var geometryInstance = this.geometry.get(id);
          this.createPrimitive = this.geometry.remove(id) || this.createPrimitive;
          if (this.updaters.remove(id)) {
              this.rectangleCollisionCheck.remove(id, geometryInstance.geometry.rectangle);
              this.updatersWithAttributes.remove(id);
              var unsubscribe = this.subscriptions.get(id);
              if (defined(unsubscribe)) {
                  unsubscribe();
                  this.subscriptions.remove(id);
              }
              return true;
          }
          return false;
      };
  
      Batch.prototype.update = function(time) {
          var isUpdated = true;
          var primitive = this.primitive;
          var primitives = this.primitives;
          var geometries = this.geometry.values;
          var i;
  
          if (this.createPrimitive) {
              var geometriesLength = geometries.length;
              if (geometriesLength > 0) {
                  if (defined(primitive)) {
                      // Keep a handle to the old primitive so it can be removed when the updated version is ready.
                      if (!defined(this.oldPrimitive)) {
                          this.oldPrimitive = primitive;
                      } else {
                          // For if the new primitive changes again before it is ready.
                          primitives.remove(primitive);
                      }
                  }
  
                  this.material = MaterialProperty.getValue(time, this.materialProperty, this.material);
  
                  primitive = new GroundPrimitive({
                      show : false,
                      asynchronous : true,
                      geometryInstances : geometries.slice(),
                      appearance : new this.appearanceType({
                          material : this.material
                          // translucent and closed properties overridden
                      }),
                      classificationType : this.classificationType
                  });
  
                  primitives.add(primitive, this.zIndex);
                  isUpdated = false;
              } else {
                  if (defined(primitive)) {
                      primitives.remove(primitive);
                      primitive = undefined;
                  }
                  var oldPrimitive = this.oldPrimitive;
                  if (defined(oldPrimitive)) {
                      primitives.remove(oldPrimitive);
                      this.oldPrimitive = undefined;
                  }
              }
  
              this.attributes.removeAll();
              this.primitive = primitive;
              this.createPrimitive = false;
          } else if (defined(primitive) && primitive.ready) {
              primitive.show = true;
              if (defined(this.oldPrimitive)) {
                  primitives.remove(this.oldPrimitive);
                  this.oldPrimitive = undefined;
              }
  
              this.material = MaterialProperty.getValue(time, this.materialProperty, this.material);
              this.primitive.appearance.material = this.material;
  
              var updatersWithAttributes = this.updatersWithAttributes.values;
              var length = updatersWithAttributes.length;
              for (i = 0; i < length; i++) {
                  var updater = updatersWithAttributes[i];
                  var entity = updater.entity;
                  var instance = this.geometry.get(updater.id);
  
                  var attributes = this.attributes.get(instance.id.id);
                  if (!defined(attributes)) {
                      attributes = primitive.getGeometryInstanceAttributes(instance.id);
                      this.attributes.set(instance.id.id, attributes);
                  }
  
                  var show = entity.isShowing && (updater.hasConstantFill || updater.isFilled(time));
                  var currentShow = attributes.show[0] === 1;
                  if (show !== currentShow) {
                      attributes.show = ShowGeometryInstanceAttribute.toValue(show, attributes.show);
                  }
  
                  var distanceDisplayConditionProperty = updater.distanceDisplayConditionProperty;
                  if (!Property.isConstant(distanceDisplayConditionProperty)) {
                      var distanceDisplayCondition = Property.getValueOrDefault(distanceDisplayConditionProperty, time, defaultDistanceDisplayCondition, distanceDisplayConditionScratch);
                      if (!DistanceDisplayCondition.equals(distanceDisplayCondition, attributes._lastDistanceDisplayCondition)) {
                          attributes._lastDistanceDisplayCondition = DistanceDisplayCondition.clone(distanceDisplayCondition, attributes._lastDistanceDisplayCondition);
                          attributes.distanceDisplayCondition = DistanceDisplayConditionGeometryInstanceAttribute.toValue(distanceDisplayCondition, attributes.distanceDisplayCondition);
                      }
                  }
              }
  
              this.updateShows(primitive);
          } else if (defined(primitive) && !primitive.ready) {
              isUpdated = false;
          }
          return isUpdated;
      };
  
      Batch.prototype.updateShows = function(primitive) {
          var showsUpdated = this.showsUpdated.values;
          var length = showsUpdated.length;
          for (var i = 0; i < length; i++) {
              var updater = showsUpdated[i];
              var entity = updater.entity;
              var instance = this.geometry.get(updater.id);
  
              var attributes = this.attributes.get(instance.id.id);
              if (!defined(attributes)) {
                  attributes = primitive.getGeometryInstanceAttributes(instance.id);
                  this.attributes.set(instance.id.id, attributes);
              }
  
              var show = entity.isShowing;
              var currentShow = attributes.show[0] === 1;
              if (show !== currentShow) {
                  attributes.show = ShowGeometryInstanceAttribute.toValue(show, attributes.show);
                  instance.attributes.show.value[0] = attributes.show[0];
              }
          }
          this.showsUpdated.removeAll();
      };
  
      Batch.prototype.contains = function(updater) {
          return this.updaters.contains(updater.id);
      };
  
      Batch.prototype.getBoundingSphere = function(updater, result) {
          var primitive = this.primitive;
          if (!primitive.ready) {
              return BoundingSphereState.PENDING;
          }
          var attributes = primitive.getGeometryInstanceAttributes(updater.entity);
          if (!defined(attributes) || !defined(attributes.boundingSphere) ||
              (defined(attributes.show) && attributes.show[0] === 0)) {
              return BoundingSphereState.FAILED;
          }
          attributes.boundingSphere.clone(result);
          return BoundingSphereState.DONE;
      };
  
      Batch.prototype.destroy = function() {
          var primitive = this.primitive;
          var primitives = this.primitives;
          if (defined(primitive)) {
              primitives.remove(primitive);
          }
          var oldPrimitive = this.oldPrimitive;
          if (defined(oldPrimitive)) {
              primitives.remove(oldPrimitive);
          }
          this.removeMaterialSubscription();
      };
  
      /**
       * @private
       */
      function StaticGroundGeometryPerMaterialBatch(primitives, classificationType, appearanceType) {
          this._items = [];
          this._primitives = primitives;
          this._classificationType = classificationType;
          this._appearanceType = appearanceType;
      }
  
      StaticGroundGeometryPerMaterialBatch.prototype.add = function(time, updater) {
          var items = this._items;
          var length = items.length;
          var geometryInstance = updater.createFillGeometryInstance(time);
          var usingSphericalTextureCoordinates = ShadowVolumeAppearance.shouldUseSphericalCoordinates(geometryInstance.geometry.rectangle);
          var zIndex = Property.getValueOrDefault(updater.zIndex, 0);
          // Check if the Entity represented by the updater can be placed in an existing batch. Requirements:
          // * compatible material (same material or same color)
          // * same type of texture coordinates (spherical vs. planar)
          // * conservatively non-overlapping with any entities in the existing batch
          for (var i = 0; i < length; ++i) {
              var item = items[i];
              if (item.isMaterial(updater) &&
                  item.usingSphericalTextureCoordinates === usingSphericalTextureCoordinates &&
                  item.zIndex === zIndex &&
                  !item.overlapping(geometryInstance.geometry.rectangle)) {
                  item.add(time, updater, geometryInstance);
                  return;
              }
          }
          // If a compatible batch wasn't found, create a new batch.
          var batch = new Batch(this._primitives, this._classificationType, this._appearanceType, updater.fillMaterialProperty, usingSphericalTextureCoordinates, zIndex);
          batch.add(time, updater, geometryInstance);
          items.push(batch);
      };
  
      StaticGroundGeometryPerMaterialBatch.prototype.remove = function(updater) {
          var items = this._items;
          var length = items.length;
          for (var i = length - 1; i >= 0; i--) {
              var item = items[i];
              if (item.remove(updater)) {
                  if (item.updaters.length === 0) {
                      items.splice(i, 1);
                      item.destroy();
                  }
                  break;
              }
          }
      };
  
      StaticGroundGeometryPerMaterialBatch.prototype.update = function(time) {
          var i;
          var items = this._items;
          var length = items.length;
  
          for (i = length - 1; i >= 0; i--) {
              var item = items[i];
              if (item.invalidated) {
                  items.splice(i, 1);
                  var updaters = item.updaters.values;
                  var updatersLength = updaters.length;
                  for (var h = 0; h < updatersLength; h++) {
                      this.add(time, updaters[h]);
                  }
                  item.destroy();
              }
          }
  
          var isUpdated = true;
          for (i = 0; i < items.length; i++) {
              isUpdated = items[i].update(time) && isUpdated;
          }
          return isUpdated;
      };
  
      StaticGroundGeometryPerMaterialBatch.prototype.getBoundingSphere = function(updater, result) {
          var items = this._items;
          var length = items.length;
          for (var i = 0; i < length; i++) {
              var item = items[i];
              if (item.contains(updater)){
                  return item.getBoundingSphere(updater, result);
              }
          }
          return BoundingSphereState.FAILED;
      };
  
      StaticGroundGeometryPerMaterialBatch.prototype.removeAllPrimitives = function() {
          var items = this._items;
          var length = items.length;
          for (var i = 0; i < length; i++) {
              items[i].destroy();
          }
          this._items.length = 0;
      };
  export default StaticGroundGeometryPerMaterialBatch;
  