itowns/lib/Process/ObjectRemovalHelper.js

A JS/WebGL framework for 3D geospatial data visualization

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));

var _default = {
  /**
   * Cleanup obj to release three.js allocated resources
   * @param {Object3D} obj object to release
   */
  cleanup: function cleanup(obj) {
    obj.layer = null;

    if (typeof obj.dispose === 'function') {
      obj.dispose();
    } else {
      if (obj.geometry) {
        obj.geometry.dispose(); // the Object Removal Helper causes inconsistencies
        // when it assigns null to a geometry present in the Cache.
        // Actually, the cache can provide a mesh whose geometry is null.
        // see https://github.com/iTowns/itowns/issues/869
        // obj.geometry = null;
      }

      if (obj.material) {
        if (Array.isArray(obj.material)) {
          var _iteratorNormalCompletion = true;
          var _didIteratorError = false;
          var _iteratorError = undefined;

          try {
            for (var _iterator = obj.material[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
              var material = _step.value;
              material.dispose();
            }
          } catch (err) {
            _didIteratorError = true;
            _iteratorError = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion && _iterator["return"] != null) {
                _iterator["return"]();
              }
            } finally {
              if (_didIteratorError) {
                throw _iteratorError;
              }
            }
          }
        } else {
          obj.material.dispose();
        } // obj.material = null;

      }
    }
  },

  /**
   * Remove obj's children belonging to a layer.
   * Neither obj nor its children will be disposed!
   * @param {Layer} layer The layer that objects must belong to. Other object are ignored
   * @param {Object3D} obj The Object3D we want to clean
   * @return {Array} an array of removed Object3D from obj (not including the recursive removals)
   */
  removeChildren: function removeChildren(layer, obj) {
    var toRemove = obj.children.filter(function (c) {
      return c.layer === layer;
    });
    obj.remove.apply(obj, (0, _toConsumableArray2["default"])(toRemove));
    return toRemove;
  },

  /**
   * Remove obj's children belonging to a layer and cleanup objexts.
   * obj will be disposed but its children **won't**!
   * @param {Layer} layer The layer that objects must belong to. Other object are ignored
   * @param {Object3D} obj The Object3D we want to clean
   * @return {Array} an array of removed Object3D from obj (not including the recursive removals)
   */
  removeChildrenAndCleanup: function removeChildrenAndCleanup(layer, obj) {
    var toRemove = obj.children.filter(function (c) {
      return c.layer === layer;
    });
    obj.remove.apply(obj, (0, _toConsumableArray2["default"])(toRemove));

    if (obj.layer === layer) {
      this.cleanup(obj);
    }

    return toRemove;
  },

  /**
   * Recursively remove obj's children belonging to a layer.
   * All removed obj will have their geometry/material disposed.
   * @param {Layer} layer The layer that objects must belong to. Other object are ignored
   * @param {Object3D} obj The Object3D we want to clean
   * @return {Array} an array of removed Object3D from obj (not including the recursive removals)
   */
  removeChildrenAndCleanupRecursively: function removeChildrenAndCleanupRecursively(layer, obj) {
    var toRemove = obj.children.filter(function (c) {
      return c.layer === layer;
    });
    var _iteratorNormalCompletion2 = true;
    var _didIteratorError2 = false;
    var _iteratorError2 = undefined;

    try {
      for (var _iterator2 = toRemove[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
        var c = _step2.value;
        this.removeChildrenAndCleanupRecursively(layer, c);
      }
    } catch (err) {
      _didIteratorError2 = true;
      _iteratorError2 = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion2 && _iterator2["return"] != null) {
          _iterator2["return"]();
        }
      } finally {
        if (_didIteratorError2) {
          throw _iteratorError2;
        }
      }
    }

    obj.remove.apply(obj, (0, _toConsumableArray2["default"])(toRemove));

    if (obj.layer === layer) {
      this.cleanup(obj);
    }

    return toRemove;
  }
};
exports["default"] = _default;