src/plugins/XKTLoaderPlugin/XKTLoaderPlugin.js
import {utils} from "../../viewer/scene/utils.js"
import {SceneModel} from "../../viewer/scene/model/index.js";
import {MetaModel} from "../../viewer/metadata/MetaModel.js";
import {Plugin} from "../../viewer/Plugin.js";
import {XKTDefaultDataSource} from "./XKTDefaultDataSource.js";
import {IFCObjectDefaults} from "../../viewer/metadata/IFCObjectDefaults.js";
import {ParserV1} from "./parsers/ParserV1.js";
import {ParserV2} from "./parsers/ParserV2.js";
import {ParserV3} from "./parsers/ParserV3.js";
import {ParserV4} from "./parsers/ParserV4.js";
import {ParserV5} from "./parsers/ParserV5.js";
import {ParserV6} from "./parsers/ParserV6.js";
import {ParserV7} from "./parsers/ParserV7.js";
import {ParserV8} from "./parsers/ParserV8.js";
import {ParserV9} from "./parsers/ParserV9.js";
import {ParserV10} from "./parsers/ParserV10.js";
import {ParserV11} from "./parsers/ParserV11.js";
import {ParserV12} from './parsers/ParserV12.js';
const parsers = {};
parsers[ParserV1.version] = ParserV1;
parsers[ParserV2.version] = ParserV2;
parsers[ParserV3.version] = ParserV3;
parsers[ParserV4.version] = ParserV4;
parsers[ParserV5.version] = ParserV5;
parsers[ParserV6.version] = ParserV6;
parsers[ParserV7.version] = ParserV7;
parsers[ParserV8.version] = ParserV8;
parsers[ParserV9.version] = ParserV9;
parsers[ParserV10.version] = ParserV10;
parsers[ParserV11.version] = ParserV11;
parsers[ParserV12.version] = ParserV12;
/**
* {@link Viewer} plugin that loads models from xeokit's optimized *````.XKT````* format.
*
* <a href="https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_XKT_OTCConferenceCenter"><img src="http://xeokit.io/img/docs/XKTLoaderPlugin/XKTLoaderPlugin.png"></a>
*
* [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_XKT_OTCConferenceCenter)]
*
* # Overview
*
* * XKTLoaderPlugin is the most efficient way to load high-detail models into xeokit.
* * An *````.XKT````* file is a single BLOB containing a model, compressed using geometry quantization
* and [pako](https://nodeca.github.io/pako/).
* * Supports double-precision coordinates.
* * Supports compressed textures.
* * Set the position, scale and rotation of each model as you load it.
* * Filter which IFC types get loaded.
* * Configure initial default appearances for IFC types.
* * Set a custom data source for *````.XKT````* and IFC metadata files.
* * Option to load multiple copies of the same model, without object ID clashes.
*
* # Creating *````.XKT````* Files and Metadata
*
* We have several sways to convert your files into XKT. See these tutorials for more info:
*
* * [Converting Models to XKT with convert2xkt](https://www.notion.so/xeokit/Converting-Models-to-XKT-with-convert2xkt-fa567843313f4db8a7d6535e76da9380) - how to convert various file formats (glTF, IFC, CityJSON, LAS/LAZ...) to XKT using our nodejs-based converter.
* * [Converting IFC Models to XKT using 3rd-Party Open Source Tools](https://www.notion.so/xeokit/Converting-IFC-Models-to-XKT-using-3rd-Party-Open-Source-Tools-c373e48bc4094ff5b6e5c5700ff580ee) - how to convert IFC files to XKT using 3rd-party open source CLI tools.
*
* # Scene representation
*
* When loading a model, XKTLoaderPlugin creates an {@link Entity} that represents the model, which
* will have {@link Entity#isModel} set ````true```` and will be registered by {@link Entity#id}
* in {@link Scene#models}. The XKTLoaderPlugin also creates an {@link Entity} for each object within the
* model. Those Entities will have {@link Entity#isObject} set ````true```` and will be registered
* by {@link Entity#id} in {@link Scene#objects}.
*
* # Metadata
*
* Since XKT V8, model metadata is included in the XKT file. If the XKT file has metadata, then loading it creates
* model metadata components within the Viewer, namely a {@link MetaModel} corresponding to the model {@link Entity},
* and a {@link MetaObject} for each object {@link Entity}.
*
* Each {@link MetaObject} has a {@link MetaObject#type}, which indicates the classification of its corresponding
* {@link Entity}. When loading metadata, we can also configure XKTLoaderPlugin with a custom lookup table of initial
* values to set on the properties of each type of {@link Entity}. By default, XKTLoaderPlugin uses its own map of
* default colors and visibilities for IFC element types.
*
* For XKT versions prior to V8, we provided the metadata to XKTLoaderPlugin as an accompanying JSON file to load. We can
* still do that for all XKT versions, and for XKT V8+ it will override any metadata provided within the XKT file.
*
* # Usage
*
* In the example below we'll load the Schependomlaan model from a [.XKT file](https://github.com/xeokit/xeokit-sdk/tree/master/examples/models/xkt/schependomlaan).
*
* This will create a bunch of {@link Entity}s that represents the model and its objects, along with a {@link MetaModel} and {@link MetaObject}s
* that hold their metadata.
*
* Since this model contains IFC types, the XKTLoaderPlugin will set the initial appearance of each object
* {@link Entity} according to its IFC type in {@link XKTLoaderPlugin#objectDefaults}.
*
* Read more about this example in the user guide on [Viewing BIM Models Offline](https://www.notion.so/xeokit/Viewing-an-IFC-Model-with-xeokit-c373e48bc4094ff5b6e5c5700ff580ee).
*
* * [[Run example](https://xeokit.github.io/xeokit-sdk/examples/index.html#BIMOffline_XKT_metadata_Schependomlaan)]
*
* ````javascript
* import {Viewer, XKTLoaderPlugin} from "xeokit-sdk.es.js";
*
* //------------------------------------------------------------------------------------------------------------------
* // 1. Create a Viewer,
* // 2. Arrange the camera
* //------------------------------------------------------------------------------------------------------------------
*
* // 1
* const viewer = new Viewer({
* canvasId: "myCanvas",
* transparent: true
* });
*
* // 2
* viewer.camera.eye = [-2.56, 8.38, 8.27];
* viewer.camera.look = [13.44, 3.31, -14.83];
* viewer.camera.up = [0.10, 0.98, -0.14];
*
* //------------------------------------------------------------------------------------------------------------------
* // 1. Create a XKTLoaderPlugin,
* // 2. Load a building model and JSON IFC metadata
* //------------------------------------------------------------------------------------------------------------------
*
* // 1
* const xktLoader = new XKTLoaderPlugin(viewer);
*
* // 2
* const model = xktLoader.load({ // Returns an Entity that represents the model
* id: "myModel",
* src: "./models/xkt/Schependomlaan.xkt",
* edges: true
* });
*
* model.on("loaded", () => {
*
* //--------------------------------------------------------------------------------------------------------------
* // 1. Find metadata on the third storey
* // 2. Select all the objects in the building's third storey
* // 3. Fit the camera to all the objects on the third storey
* //--------------------------------------------------------------------------------------------------------------
*
* // 1
* const metaModel = viewer.metaScene.metaModels["myModel"]; // MetaModel with ID "myModel"
* const metaObject
* = viewer.metaScene.metaObjects["0u4wgLe6n0ABVaiXyikbkA"]; // MetaObject with ID "0u4wgLe6n0ABVaiXyikbkA"
*
* const name = metaObject.name; // "01 eerste verdieping"
* const type = metaObject.type; // "IfcBuildingStorey"
* const parent = metaObject.parent; // MetaObject with type "IfcBuilding"
* const children = metaObject.children; // Array of child MetaObjects
* const objectId = metaObject.id; // "0u4wgLe6n0ABVaiXyikbkA"
* const objectIds = viewer.metaScene.getObjectIDsInSubtree(objectId); // IDs of leaf sub-objects
* const aabb = viewer.scene.getAABB(objectIds); // Axis-aligned boundary of the leaf sub-objects
*
* // 2
* viewer.scene.setObjectsSelected(objectIds, true);
*
* // 3
* viewer.cameraFlight.flyTo(aabb);
* });
*
* // Find the model Entity by ID
* model = viewer.scene.models["myModel"];
*
* // Destroy the model
* model.destroy();
* ````
*
* # Loading XKT files containing textures
*
* XKTLoaderPlugin uses a {@link KTX2TextureTranscoder} to load textures in XKT files (XKT v10+). An XKTLoaderPlugin has its own
* default KTX2TextureTranscoder, configured to load the Basis Codec from the CDN. If we wish, we can override that with our own
* KTX2TextureTranscoder instance that's configured to load the Codec locally.
*
* In the example below, we'll create a {@link Viewer} and add an XKTLoaderPlugin
* configured with a KTX2TextureTranscoder that finds the Codec in our local file system. Then we'll use the
* XKTLoaderPlugin to load an XKT file that contains KTX2 textures, which the plugin will transcode using
* its KTX2TextureTranscoder.
*
* We'll configure our KTX2TextureTranscoder to load the Basis Codec from a local directory. If we were happy with loading the
* Codec from our CDN (ie. our app will always have an Internet connection) then we could just leave out the
* KTX2TextureTranscoder altogether, and let the XKTLoaderPlugin use its internal default KTX2TextureTranscoder, which is configured to
* load the Codec from the CDN. We'll stick with loading our own Codec, in case we want to run our app without an Internet connection.
*
* <a href="https://xeokit.github.io/xeokit-sdk/examples/buildings/#xkt_vbo_textures_HousePlan"><img src="https://xeokit.github.io/xeokit-sdk/assets/images/xktWithTextures.png"></a>
*
* * [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/buildings/#xkt_vbo_textures_HousePlan)]
*
* ````javascript
* const viewer = new Viewer({
* canvasId: "myCanvas",
* transparent: true
* });
*
* viewer.camera.eye = [-2.56, 8.38, 8.27];
* viewer.camera.look = [13.44, 3.31, -14.83];
* viewer.camera.up = [0.10, 0.98, -0.14];
*
* const textureTranscoder = new KTX2TextureTranscoder({
* viewer,
* transcoderPath: "https://cdn.jsdelivr.net/npm/@xeokit/xeokit-sdk/dist/basis/" // <------ Path to Basis Universal transcoder
* });
*
* const xktLoader = new XKTLoaderPlugin(viewer, {
* textureTranscoder // <<------------- Transcodes KTX2 textures in XKT files
* });
*
* const sceneModel = xktLoader.load({
* id: "myModel",
* src: "./HousePlan.xkt" // <<------ XKT file with KTX2 textures
* });
* ````
*
* # Transforming
*
* We have the option to rotate, scale and translate each *````.XKT````* model as we load it.
*
* This lets us load multiple models, or even multiple copies of the same model, and position them apart from each other.
*
* In the example below, we'll scale our model to half its size, rotate it 90 degrees about its local X-axis, then
* translate it 100 units along its X axis.
*
* ````javascript
* xktLoader.load({
* src: "./models/xkt/Duplex.ifc.xkt",
* rotation: [90,0,0],
* scale: [0.5, 0.5, 0.5],
* position: [100, 0, 0]
* });
* ````
*
* # Including and excluding IFC types
*
* We can also load only those objects that have the specified IFC types.
*
* In the example below, we'll load only the objects that represent walls.
*
* ````javascript
* const model2 = xktLoader.load({
* id: "myModel2",
* src: "./models/xkt/OTCConferenceCenter.xkt",
* includeTypes: ["IfcWallStandardCase"]
* });
* ````
*
* We can also load only those objects that **don't** have the specified IFC types.
*
* In the example below, we'll load only the objects that do not represent empty space.
*
* ````javascript
* const model3 = xktLoader.load({
* id: "myModel3",
* src: "./models/xkt/OTCConferenceCenter.xkt",
* excludeTypes: ["IfcSpace"]
* });
* ````
*
* # Including specific elements by id
*
* We can also load only those objects that have the specified ids.
*
* In the example below, we'll load only the objects that represent a specified wall with 4 windows.
*
* ````javascript
* const model4 = xktLoader.load({
* id: "myModel4",
* src: "../../assets/models/xkt/v10/glTF-Embedded/Duplex_A_20110505.glTFEmbedded.xkt",
* includeIds: ["2O2Fr$t4X7Zf8NOew3FLOH", "1hOSvn6df7F8_7GcBWlS_W", "1hOSvn6df7F8_7GcBWlS4Q", "1hOSvn6df7F8_7GcBWlS1M", "1hOSvn6df7F8_7GcBWlS2V"],
* });
* ````
*
* # Configuring initial IFC object appearances
*
* We can specify the custom initial appearance of loaded objects according to their IFC types.
*
* This is useful for things like:
*
* * setting the colors to our objects according to their IFC types,
* * automatically hiding ````IfcSpace```` objects, and
* * ensuring that ````IfcWindow```` objects are always transparent.
* <br>
* In the example below, we'll load a model, while configuring ````IfcSpace```` elements to be always initially invisible,
* and ````IfcWindow```` types to be always translucent blue.
*
* ````javascript
* const myObjectDefaults = {
*
* IfcSpace: {
* visible: false
* },
* IfcWindow: {
* colorize: [0.337255, 0.303922, 0.870588], // Blue
* opacity: 0.3
* },
*
* //...
*
* DEFAULT: {
* colorize: [0.5, 0.5, 0.5]
* }
* };
*
* const model4 = xktLoader.load({
* id: "myModel4",
* src: "./models/xkt/Duplex.ifc.xkt",
* objectDefaults: myObjectDefaults // Use our custom initial default states for object Entities
* });
* ````
*
* When we don't customize the appearance of IFC types, as just above, then IfcSpace elements tend to obscure other
* elements, which can be confusing.
*
* It's often helpful to make IfcSpaces transparent and unpickable, like this:
*
* ````javascript
* const xktLoader = new XKTLoaderPlugin(viewer, {
* objectDefaults: {
* IfcSpace: {
* pickable: false,
* opacity: 0.2
* }
* }
* });
* ````
*
* Alternatively, we could just make IfcSpaces invisible, which also makes them unpickable:
*
* ````javascript
* const xktLoader = new XKTLoaderPlugin(viewer, {
* objectDefaults: {
* IfcSpace: {
* visible: false
* }
* }
* });
* ````
*
* # Configuring a custom data source
*
* By default, XKTLoaderPlugin will load *````.XKT````* files and metadata JSON over HTTP.
*
* In the example below, we'll customize the way XKTLoaderPlugin loads the files by configuring it with our own data source
* object. For simplicity, our custom data source example also uses HTTP, using a couple of xeokit utility functions.
*
* ````javascript
* import {utils} from "xeokit-sdk.es.js";
*
* class MyDataSource {
*
* constructor() {
* }
*
* // Gets metamodel JSON
* getMetaModel(metaModelSrc, ok, error) {
* console.log("MyDataSource#getMetaModel(" + metaModelSrc + ", ... )");
* utils.loadJSON(metaModelSrc,
* (json) => {
* ok(json);
* },
* function (errMsg) {
* error(errMsg);
* });
* }
*
* // Gets the contents of the given .XKT file in an arraybuffer
* getXKT(src, ok, error) {
* console.log("MyDataSource#getXKT(" + xKTSrc + ", ... )");
* utils.loadArraybuffer(src,
* (arraybuffer) => {
* ok(arraybuffer);
* },
* function (errMsg) {
* error(errMsg);
* });
* }
* }
*
* const xktLoader2 = new XKTLoaderPlugin(viewer, {
* dataSource: new MyDataSource()
* });
*
* const model5 = xktLoader2.load({
* id: "myModel5",
* src: "./models/xkt/Duplex.ifc.xkt"
* });
* ````
*
* # Loading multiple copies of a model, without object ID clashes
*
* Sometimes we need to load two or more instances of the same model, without having clashes
* between the IDs of the equivalent objects in the model instances.
*
* As shown in the example below, we do this by setting {@link XKTLoaderPlugin#globalizeObjectIds} ````true```` before we load our models.
*
* * [[Run example](https://xeokit.github.io/xeokit-sdk/examples/index.html#TreeViewPlugin_Containment_MultipleModels)]
*
* ````javascript
* xktLoader.globalizeObjectIds = true;
*
* const model = xktLoader.load({
* id: "model1",
* src: "./models/xkt/Schependomlaan.xkt"
* });
*
* const model2 = xktLoader.load({
* id: "model2",
* src: "./models/xkt/Schependomlaan.xkt"
* });
* ````
*
* For each {@link Entity} loaded by these two calls, {@link Entity#id} and {@link MetaObject#id} will get prefixed by
* the ID of their model, in order to avoid ID clashes between the two models.
*
* An Entity belonging to the first model will get an ID like this:
*
* ````
* myModel1#0BTBFw6f90Nfh9rP1dlXrb
* ````
*
* The equivalent Entity in the second model will get an ID like this:
*
* ````
* myModel2#0BTBFw6f90Nfh9rP1dlXrb
* ````
*
* Now, to update the visibility of both of those Entities collectively, using {@link Scene#setObjectsVisible}, we can
* supply just the IFC product ID part to that method:
*
* ````javascript
* myViewer.scene.setObjectVisibilities("0BTBFw6f90Nfh9rP1dlXrb", true);
* ````
*
* The method, along with {@link Scene#setObjectsXRayed}, {@link Scene#setObjectsHighlighted} etc, will internally expand
* the given ID to refer to the instances of that Entity in both models.
*
* We can also, of course, reference each Entity directly, using its globalized ID:
*
* ````javascript
* myViewer.scene.setObjectVisibilities("myModel1#0BTBFw6f90Nfh9rP1dlXrb", true);
*````
*
* We can also provide an HTTP URL to the XKT file:
*
* ````javascript
* const sceneModel = xktLoader.load({
* src: "https://xeokit.github.io/xeokit-sdk/assets/models/models/xkt/Schependomlaan.xkt",
* id: "myModel",
* });
* ````
*
* # Loading a model from a manifest of XKT files
*
* The `ifc2gltf` tool from Creoox, which converts IFC files into glTF geometry and JSON metadata files, has the option to
* split its output into multiple pairs of glTF and JSON files, accompanied by a JSON manifest that lists the files.
*
* To integrate with that option, the `convert2xkt` tool, which converts glTF geometry and JSON metadata files into XKT files,
* also has the option to batch-convert the glTF+JSON files in the manifest, in one invocation.
*
* When we use this option, convert2xkt will output a bunch of XKT files, along with a JSON manifest file that lists those XKT files.
*
* Working down the pipeline, the XKTLoaderPlugin has the option batch-load all XKT files listed in that manifest
* into a xeokit Viewer in one load operation, combining the XKT files into a single SceneModel and MetaModel.
*
* You can learn more about this conversion and loading process, with splitting, batch converting and batch loading,
* in [this tutorial](https://www.notion.so/xeokit/Importing-Huge-IFC-Models-as-Multiple-XKT-Files-165fc022e94742cf966ee50003572259).
*
* To show how to use XKTLoaderPlugin to load a manifest of XKT files, let's imagine that we have a set of such XKT files. As
* described in the tutorial, they were converted by `ifc2gltf` from an IFC file into a set of glTF+JSON files, that were
* then converted by convert2xkt into this set of XKT files and a manifest, as shown below.
*
* ````bash
* ./
* ├── model_1.xkt
* ├── model_2.xkt
* ├── model_3.xkt
* ├── model_4..xkt
* └── model.xkt.manifest.json
* ````
*
* The `model.xkt.manifest.json` XKT manifest would look something like this:
*
* ````json
* {
* "inputFile": null,
* "converterApplication": "convert2xkt",
* "converterApplicationVersion": "v1.1.9",
* "conversionDate": "10-08-2023- 02-05-01",
* "outputDir": null,
* "xktFiles": [
* "model_1.xkt",
* "model_2.xkt",
* "model_3.xkt",
* "model_4.xkt"
* ]
* }
* ````
*
* Now, to load all those XKT files into a single SceneModel and MetaModel in one operation, we pass a path to the XKT
* manifest to `XKTLoaderPlugin.load`, as shown in the example below:
*
* * [[Run example](https://xeokit.github.io/xeokit-sdk/examples/buildings/#xkt_manifest_KarhumakiBridge)]
*
* ````javascript
* import {
* Viewer,
* XKTLoaderPlugin,
* TreeViewPlugin,
* } from "xeokit-sdk.es.js";
*
* constviewer = new Viewer({
* canvasId: "myCanvas"
* });
*
* viewer.scene.camera.eye = [26.54, 29.29, 36.20,];
* viewer.scene.camera.look = [-23.51, -8.26, -21.65,];
* viewer.scene.camera.up = [-0.2, 0.89, -0.33,];
*
* const xktLoader = new XKTLoaderPlugin(viewer);
*
* const sceneModel = xktLoader.load({
* manifestSrc: "model.xkt.manifest.json",
* id: "myModel",
* });
*
* const metaModel = viewer.metaScene.metaModels[sceneModel.id];
*
* // Then when we need to, we can destroy the SceneModel
* // and MetaModel in one shot, like so:
*
* sceneModel.destroy();
* metaModel.destroy();
* ````
*
* The main advantage here, of splitting IFC files like this within the conversion and import pipeline,
* is to reduce the memory pressure on each of the `ifc2gltf`, `convert2xkt` and XKTLoaderPlugin components.
* They work much reliably (and faster) when processing smaller files (eg. 20MB) than when processing large files (eg. 500MB), where
* they have less trouble allocating the system memory they need for conversion and parsing.
*
* We can also provide an HTTP URL to the manifest:
*
* ````javascript
* const sceneModel = xktLoader.load({
* manifestSrc: "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model.xkt.manifest.json",
* id: "myModel",
* });
* ````
*
* We can also provide the manifest as parameter object:
*
* ````javascript
* const sceneModel = xktLoader.load({
* id: "myModel",
* manifest: {
* inputFile: "assets/models/gltf/Karhumaki/model.glb.manifest.json",
* converterApplication: "convert2xkt",
* converterApplicationVersion: "v1.1.10",
* conversionDate": "09-11-2023- 18-29-01",
* xktFiles: [
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model.xkt",
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model_1.xkt",
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model_2.xkt",
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model_3.xkt",
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model_4.xkt",
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model_5.xkt",
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model_6.xkt",
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model_7.xkt",
* "../../assets/models/xkt/v10/split/Karhumaki-Bridge/model_8.xkt"
* ]
* }
* });
* ````
*
* We can also provide the paths to the XKT files as HTTP URLs:
*
* ````javascript
* const sceneModel = xktLoader.load({
* id: "myModel",
* manifest: {
* inputFile: "assets/models/gltf/Karhumaki/model.glb.manifest.json",
* converterApplication: "convert2xkt",
* converterApplicationVersion: "v1.1.10",
* conversionDate": "09-11-2023- 18-29-01",
* xktFiles: [
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model.xkt",
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model_1.xkt",
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model_2.xkt",
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model_3.xkt",
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model_4.xkt",
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model_5.xkt",
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model_6.xkt",
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model_7.xkt",
* "https://xeokit.github.io/xeokit-sdk/assets/models/xkt/v10/split/Karhumaki-Bridge/model_8.xkt"
* ]
* }
* });
* ````
*
* @class XKTLoaderPlugin
*/
class XKTLoaderPlugin extends Plugin {
/**
* @constructor
*
* @param {Viewer} viewer The Viewer.
* @param {Object} cfg Plugin configuration.
* @param {String} [cfg.id="XKTLoader"] Optional ID for this plugin, so that we can find it within {@link Viewer#plugins}.
* @param {Object} [cfg.objectDefaults] Map of initial default states for each loaded {@link Entity} that represents an object. Default value is {@link IFCObjectDefaults}.
* @param {Object} [cfg.dataSource] A custom data source through which the XKTLoaderPlugin can load model and metadata files. Defaults to an instance of {@link XKTDefaultDataSource}, which loads uover HTTP.
* @param {String[]} [cfg.includeTypes] When loading metadata, only loads objects that have {@link MetaObject}s with {@link MetaObject#type} values in this list.
* @param {String[]} [cfg.excludeTypes] When loading metadata, never loads objects that have {@link MetaObject}s with {@link MetaObject#type} values in this list.
* @param {Boolean} [cfg.excludeUnclassifiedObjects=false] When loading metadata and this is ````true````, will only load {@link Entity}s that have {@link MetaObject}s (that are not excluded). This is useful when we don't want Entitys in the Scene that are not represented within IFC navigation components, such as {@link TreeViewPlugin}.
* @param {Boolean} [cfg.reuseGeometries=true] Indicates whether to enable geometry reuse (````true```` by default) or whether to internally expand
* all geometry instances into batches (````false````), and not use instancing to render them. Setting this ````false```` can significantly
* improve Viewer performance for models that have a lot of geometry reuse, but may also increase the amount of
* browser and GPU memory they require. See [#769](https://github.com/xeokit/xeokit-sdk/issues/769) for more info.
* @param {Number} [cfg.maxGeometryBatchSize=50000000] Maximum geometry batch size, as number of vertices. This is optionally supplied
* to limit the size of the batched geometry arrays that {@link SceneModel} internally creates for batched geometries.
* A low value means less heap allocation/de-allocation while loading batched geometries, but more draw calls and
* slower rendering speed. A high value means larger heap allocation/de-allocation while loading, but less draw calls
* and faster rendering speed. It's recommended to keep this somewhere roughly between ````50000```` and ````50000000```.
* @param {KTX2TextureTranscoder} [cfg.textureTranscoder] Transcoder used internally to transcode KTX2
* textures within the XKT. Only required when the XKT is version 10 or later, and contains KTX2 textures.
*/
constructor(viewer, cfg = {}) {
super("XKTLoader", viewer, cfg);
this._maxGeometryBatchSize = cfg.maxGeometryBatchSize;
this.textureTranscoder = cfg.textureTranscoder;
this.dataSource = cfg.dataSource;
this.objectDefaults = cfg.objectDefaults;
this.includeTypes = cfg.includeTypes;
this.excludeTypes = cfg.excludeTypes;
this.excludeUnclassifiedObjects = cfg.excludeUnclassifiedObjects;
this.reuseGeometries = cfg.reuseGeometries;
}
/**
* Gets the ````.xkt```` format versions supported by this XKTLoaderPlugin/
* @returns {string[]}
*/
get supportedVersions() {
return Object.keys(parsers);
}
/**
* Gets the texture transcoder.
*
* @type {TextureTranscoder}
*/
get textureTranscoder() {
return this._textureTranscoder;
}
/**
* Sets the texture transcoder.
*
* @type {TextureTranscoder}
*/
set textureTranscoder(textureTranscoder) {
this._textureTranscoder = textureTranscoder;
}
/**
* Gets the custom data source through which the XKTLoaderPlugin can load models and metadata.
*
* Default value is {@link XKTDefaultDataSource}, which loads via HTTP.
*
* @type {Object}
*/
get dataSource() {
return this._dataSource;
}
/**
* Sets a custom data source through which the XKTLoaderPlugin can load models and metadata.
*
* Default value is {@link XKTDefaultDataSource}, which loads via HTTP.
*
* @type {Object}
*/
set dataSource(value) {
this._dataSource = value || new XKTDefaultDataSource();
}
/**
* Gets map of initial default states for each loaded {@link Entity} that represents an object.
*
* Default value is {@link IFCObjectDefaults}.
*
* @type {{String: Object}}
*/
get objectDefaults() {
return this._objectDefaults;
}
/**
* Sets map of initial default states for each loaded {@link Entity} that represents an object.
*
* Default value is {@link IFCObjectDefaults}.
*
* @type {{String: Object}}
*/
set objectDefaults(value) {
this._objectDefaults = value || IFCObjectDefaults;
}
/**
* Gets the whitelist of the IFC types loaded by this XKTLoaderPlugin.
*
* When loading models with metadata, causes this XKTLoaderPlugin to only load objects whose types are in this
* list. An object's type is indicated by its {@link MetaObject}'s {@link MetaObject#type}.
*
* Default value is ````undefined````.
*
* @type {String[]}
*/
get includeTypes() {
return this._includeTypes;
}
/**
* Sets the whitelist of the IFC types loaded by this XKTLoaderPlugin.
*
* When loading models with metadata, causes this XKTLoaderPlugin to only load objects whose types are in this
* list. An object's type is indicated by its {@link MetaObject}'s {@link MetaObject#type}.
*
* Default value is ````undefined````.
*
* @type {String[]}
*/
set includeTypes(value) {
this._includeTypes = value;
}
/**
* Gets the blacklist of IFC types that are never loaded by this XKTLoaderPlugin.
*
* When loading models with metadata, causes this XKTLoaderPlugin to **not** load objects whose types are in this
* list. An object's type is indicated by its {@link MetaObject}'s {@link MetaObject#type}.
*
* Default value is ````undefined````.
*
* @type {String[]}
*/
get excludeTypes() {
return this._excludeTypes;
}
/**
* Sets the blacklist of IFC types that are never loaded by this XKTLoaderPlugin.
*
* When loading models with metadata, causes this XKTLoaderPlugin to **not** load objects whose types are in this
* list. An object's type is indicated by its {@link MetaObject}'s {@link MetaObject#type}.
*
* Default value is ````undefined````.
*
* @type {String[]}
*/
set excludeTypes(value) {
this._excludeTypes = value;
}
/**
* Gets the whitelist of the specified elements loaded by this XKTLoaderPlugin.
*
* When loading models with metadata, causes this XKTLoaderPlugin to only load objects whose ids are in this
* list. An object's id is indicated by its {@link MetaObject}'s {@link MetaObject#id}.
*
* Default value is ````undefined````.
*
* @type {String[]}
*/
get includeIds() {
return this._includeIds;
}
/**
* Sets the whitelist of the specified elements by this XKTLoaderPlugin.
*
* When loading models with metadata, causes this XKTLoaderPlugin to only load objects whose ids are in this
* list. An object's id is indicated by its {@link MetaObject}'s {@link MetaObject#id}.
*
* Default value is ````undefined````.
*
* @type {String[]}
*/
set includeIds(value) {
this._includeIds = value;
}
/**
* Gets whether we load objects that don't have IFC types.
*
* When loading models with metadata and this is ````true````, XKTLoaderPlugin will not load objects
* that don't have IFC types.
*
* Default value is ````false````.
*
* @type {Boolean}
*/
get excludeUnclassifiedObjects() {
return this._excludeUnclassifiedObjects;
}
/**
* Sets whether we load objects that don't have IFC types.
*
* When loading models with metadata and this is ````true````, XKTLoaderPlugin will not load objects
* that don't have IFC types.
*
* Default value is ````false````.
*
* @type {Boolean}
*/
set excludeUnclassifiedObjects(value) {
this._excludeUnclassifiedObjects = !!value;
}
/**
* Gets whether XKTLoaderPlugin globalizes each {@link Entity#id} and {@link MetaObject#id} as it loads a model.
*
* Default value is ````false````.
*
* @type {Boolean}
*/
get globalizeObjectIds() {
return this._globalizeObjectIds;
}
/**
* Sets whether XKTLoaderPlugin globalizes each {@link Entity#id} and {@link MetaObject#id} as it loads a model.
*
* Set this ````true```` when you need to load multiple instances of the same model, to avoid ID clashes
* between the objects in the different instances.
*
* When we load a model with this set ````true````, then each {@link Entity#id} and {@link MetaObject#id} will be
* prefixed by the ID of the model, ie. ````<modelId>#<objectId>````.
*
* {@link Entity#originalSystemId} and {@link MetaObject#originalSystemId} will always hold the original, un-prefixed, ID values.
*
* Default value is ````false````.
*
* See the main {@link XKTLoaderPlugin} class documentation for usage info.
*
* @type {Boolean}
*/
set globalizeObjectIds(value) {
this._globalizeObjectIds = !!value;
}
/**
* Gets whether XKTLoaderPlugin enables geometry reuse when loading models.
*
* Default value is ````true````.
*
* @type {Boolean}
*/
get reuseGeometries() {
return this._reuseGeometries;
}
/**
* Sets whether XKTLoaderPlugin enables geometry reuse when loading models.
*
* Default value is ````true````.
*
* Geometry reuse saves memory, but can impact Viewer performance when there are many reused geometries. For
* this reason, we can set this ````false```` to disable geometry reuse for models loaded by this XKTLoaderPlugin
* (which will then "expand" the geometry instances into batches instead).
*
* The result will be be less WebGL draw calls (which are expensive), at the cost of increased memory footprint.
*
* See [#769](https://github.com/xeokit/xeokit-sdk/issues/769) for more info.
*
* @type {Boolean}
*/
set reuseGeometries(value) {
this._reuseGeometries = value !== false;
}
/**
* Loads an ````.xkt```` model into this XKTLoaderPlugin's {@link Viewer}.
*
* Since xeokit/xeokit-sdk 1.9.0, XKTLoaderPlugin has supported XKT 8, which bundles the metamodel
* data (eg. an IFC element hierarchy) in the XKT file itself. For XKT 8, we therefore no longer need to
* load the metamodel data from a separate accompanying JSON file, as we did with previous XKT versions.
* However, if we do choose to specify a separate metamodel JSON file to load (eg. for backward compatibility
* in data pipelines), then that metamodel will be loaded and the metamodel in the XKT 8 file will be ignored.
*
* @param {*} params Loading parameters.
* @param {String} [params.id] ID to assign to the root {@link Entity#id}, unique among all components in the Viewer's {@link Scene}, generated automatically by default.
* @param {String} [params.src] Path or URL to an *````.xkt````* file, as an alternative to the ````xkt```` parameter.
* @param {ArrayBuffer} [params.xkt] The *````.xkt````* file data, as an alternative to the ````src```` parameter.
* @param {String} [params.metaModelSrc] Path or URL to an optional metadata file, as an alternative to the ````metaModelData```` parameter.
* @param {*} [params.metaModelData] JSON model metadata, as an alternative to the ````metaModelSrc```` parameter.
* @param {String} [params.manifestSrc] Path or URL to a JSON manifest file that provides paths to ````.xkt```` files to load as parts of the model. Use this option to load models that have been split into
* multiple XKT files. See [tutorial](https://www.notion.so/xeokit/Automatically-Splitting-Large-Models-for-Better-Performance-165fc022e94742cf966ee50003572259) for more info.
* @param {Object} [params.manifest] A JSON manifest object (as an alternative to a path or URL) that provides paths to ````.xkt```` files to load as parts of the model. Use this option to load models that have been split into
* multiple XKT files. See [tutorial](https://www.notion.so/xeokit/Automatically-Splitting-Large-Models-for-Better-Performance-165fc022e94742cf966ee50003572259) for more info.
* @param {{String:Object}} [params.objectDefaults] Map of initial default states for each loaded {@link Entity} that represents an object. Default value is {@link IFCObjectDefaults}.
* @param {String[]} [params.includeTypes] When loading metadata, only loads objects that have {@link MetaObject}s with {@link MetaObject#type} values in this list.
* @param {String[]} [params.excludeTypes] When loading metadata, never loads objects that have {@link MetaObject}s with {@link MetaObject#type} values in this list.
* @param {String[]} [params.includeIds] When loading metadata, only loads objects that have {@link MetaObject}s with {@link MetaObject#id} values in this list.
* @param {Boolean} [params.edges=false] Whether or not xeokit renders the model with edges emphasized.
* @param {Number[]} [params.origin=[0,0,0]] The model's World-space double-precision 3D origin. Use this to position the model within xeokit's World coordinate system, using double-precision coordinates.
* @param {Number[]} [params.position=[0,0,0]] The model single-precision 3D position, relative to the ````origin```` parameter.
* @param {Number[]} [params.scale=[1,1,1]] The model's scale.
* @param {Number[]} [params.rotation=[0,0,0]] The model's orientation, given as Euler angles in degrees, for each of the X, Y and Z axis.
* @param {Number[]} [params.matrix=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1]] The model's world transform matrix. Overrides the position, scale and rotation parameters. Relative to ````origin````.
* @param {Boolean} [params.edges=false] Indicates if the model's edges are initially emphasized.
* @param {Boolean} [params.saoEnabled=true] Indicates if Scalable Ambient Obscurance (SAO) is enabled for the model. SAO is configured by the Scene's {@link SAO} component. Only works when {@link SAO#enabled} is also ````true````
* @param {Boolean} [params.pbrEnabled=true] Indicates if physically-based rendering (PBR) is enabled for the model. Overrides ````colorTextureEnabled````. Only works when {@link Scene#pbrEnabled} is also ````true````.
* @param {Boolean} [params.colorTextureEnabled=true] Indicates if base color texture rendering is enabled for the model. Overridden by ````pbrEnabled````. Only works when {@link Scene#colorTextureEnabled} is also ````true````.
* @param {Number} [params.backfaces=false] When we set this ````true````, then we force rendering of backfaces for the model. When
* we leave this ````false````, then we allow the Viewer to decide when to render backfaces. In that case, the
* Viewer will hide backfaces on watertight meshes, show backfaces on open meshes, and always show backfaces on meshes when we slice them open with {@link SectionPlane}s.
* @param {Boolean} [params.excludeUnclassifiedObjects=false] When loading metadata and this is ````true````, will only load {@link Entity}s that have {@link MetaObject}s (that are not excluded). This is useful when we don't want Entitys in the Scene that are not represented within IFC navigation components, such as {@link TreeViewPlugin}.
* @param {Boolean} [params.globalizeObjectIds=false] Indicates whether to globalize each {@link Entity#id} and {@link MetaObject#id}, in case you need to prevent ID clashes with other models. See {@link XKTLoaderPlugin#globalizeObjectIds} for more info.
* @param {Boolean} [params.reuseGeometries=true] Indicates whether to enable geometry reuse (````true```` by default) or whether to expand
* all geometry instances into batches (````false````), and not use instancing to render them. Setting this ````false```` can significantly
* improve Viewer performance for models that have excessive geometry reuse, but may also increases the amount of
* browser and GPU memory used by the model. See [#769](https://github.com/xeokit/xeokit-sdk/issues/769) for more info.
* @param {Boolean} [params.dtxEnabled=true] When ````true```` (default) use data textures (DTX), where appropriate, to
* represent the returned model. Set false to always use vertex buffer objects (VBOs). Note that DTX is only applicable
* to non-textured triangle meshes, and that VBOs are always used for meshes that have textures, line segments, or point
* primitives. Only works while {@link DTX#enabled} is also ````true````.
* @param {Number} [params.renderOrder=0] Specifies the rendering order for the model. This is used to control the order in which
* SceneModels are drawn when they have transparent objects, to give control over the order in which those objects are blended within the transparent
* render pass.
* @returns {Entity} Entity representing the model, which will have {@link Entity#isModel} set ````true```` and will be registered by {@link Entity#id} in {@link Scene#models}.
*/
load(params = {}) {
if (params.id && this.viewer.scene.components[params.id]) {
this.error("Component with this ID already exists in viewer: " + params.id + " - will autogenerate this ID");
delete params.id;
}
if (!params.src && !params.xkt && !params.manifestSrc && !params.manifest)
throw new Error("XKTLoaderPlugin: load() param expected: src, xkt, manifestSrc or manifestData");
const options = {};
const includeTypes = params.includeTypes || this._includeTypes;
const excludeTypes = params.excludeTypes || this._excludeTypes;
const includeIds = params.includeIds || this._includeIds;
const objectDefaults = params.objectDefaults || this._objectDefaults;
options.reuseGeometries = (params.reuseGeometries !== null && params.reuseGeometries !== undefined) ? params.reuseGeometries : (this._reuseGeometries !== false);
if (includeTypes) {
options.includeTypesMap = {};
for (let i = 0, len = includeTypes.length; i < len; i++) {
options.includeTypesMap[includeTypes[i]] = true;
}
}
if (excludeTypes) {
options.excludeTypesMap = {};
for (let i = 0, len = excludeTypes.length; i < len; i++) {
options.excludeTypesMap[excludeTypes[i]] = true;
}
}
if (includeIds) {
options.includeIdsMap = {};
for (let i = 0, len = includeIds.length; i < len; i++) {
options.includeIdsMap[includeIds[i]] = true;
}
}
if (objectDefaults) {
options.objectDefaults = objectDefaults;
}
options.excludeUnclassifiedObjects = (params.excludeUnclassifiedObjects !== undefined) ? (!!params.excludeUnclassifiedObjects) : this._excludeUnclassifiedObjects;
options.globalizeObjectIds = (params.globalizeObjectIds !== undefined && params.globalizeObjectIds !== null) ? (!!params.globalizeObjectIds) : this._globalizeObjectIds;
const sceneModel = new SceneModel(this.viewer.scene, utils.apply(params, {
isModel: true,
textureTranscoder: this._textureTranscoder,
maxGeometryBatchSize: this._maxGeometryBatchSize,
origin: params.origin,
disableVertexWelding: params.disableVertexWelding || false,
disableIndexRebucketing: params.disableIndexRebucketing || false,
dtxEnabled: params.dtxEnabled,
renderOrder: params.renderOrder
}));
const modelId = sceneModel.id; // In case ID was auto-generated
const metaModel = new MetaModel({
metaScene: this.viewer.metaScene,
id: modelId
});
this.viewer.scene.canvas.spinner.processes++;
const finish = () => {
if (sceneModel.destroyed) {
return;
}
// this._createDefaultMetaModelIfNeeded(sceneModel, params, options);
sceneModel.finalize();
metaModel.finalize();
this.viewer.scene.canvas.spinner.processes--;
sceneModel.once("destroyed", () => {
this.viewer.metaScene.destroyMetaModel(metaModel.id);
});
this.scheduleTask(() => {
if (sceneModel.destroyed) {
return;
}
sceneModel.scene.fire("modelLoaded", sceneModel.id); // FIXME: Assumes listeners know order of these two events
sceneModel.fire("loaded", true, false); // Don't forget the event, for late subscribers
});
}
const error = (errMsg) => {
this.viewer.scene.canvas.spinner.processes--;
this.error(errMsg);
sceneModel.fire("error", errMsg);
}
let nextId = 0;
const manifestCtx = {
getNextId: () => {
return `${modelId}.${nextId++}`;
}
};
if (params.metaModelSrc || params.metaModelData) {
if (params.metaModelSrc) {
const metaModelSrc = params.metaModelSrc;
this._dataSource.getMetaModel(metaModelSrc, (metaModelData) => {
if (sceneModel.destroyed) {
return;
}
metaModel.loadData(metaModelData, {
includeTypes: includeTypes,
excludeTypes: excludeTypes,
globalizeObjectIds: options.globalizeObjectIds
});
if (params.src) {
this._loadModel(params.src, options, sceneModel, null, manifestCtx, finish, error);
} else {
this._parseModel(params.xkt, options, sceneModel, null, manifestCtx);
finish();
}
}, (errMsg) => {
error(`load(): Failed to load model metadata for model '${modelId} from '${metaModelSrc}' - ${errMsg}`);
});
} else if (params.metaModelData) {
metaModel.loadData(params.metaModelData, {
includeTypes: includeTypes,
excludeTypes: excludeTypes,
globalizeObjectIds: options.globalizeObjectIds
});
if (params.src) {
this._loadModel(params.src, options, sceneModel, null, manifestCtx, finish, error);
} else {
this._parseModel(params.xkt, options, sceneModel, null, manifestCtx);
finish();
}
}
} else {
if (params.src) {
this._loadModel(params.src, options, sceneModel, metaModel, manifestCtx, finish, error);
} else if (params.xkt) {
this._parseModel(params.xkt, options, sceneModel, metaModel, manifestCtx);
finish();
} else if (params.manifestSrc || params.manifest) {
const baseDir = params.manifestSrc ? getBaseDirectory(params.manifestSrc) : "";
const loadJSONs = (metaDataFiles, done, error) => {
let i = 0;
const loadNext = () => {
if (sceneModel.destroyed) {
done();
} else if (i >= metaDataFiles.length) {
done();
} else {
this._dataSource.getMetaModel(`${baseDir}${metaDataFiles[i]}`, (metaModelData) => {
metaModel.loadData(metaModelData, {
includeTypes: includeTypes,
excludeTypes: excludeTypes,
globalizeObjectIds: options.globalizeObjectIds
});
i++;
this.scheduleTask(loadNext, 200);
}, error);
}
}
loadNext();
}
const loadXKTs_excludeTheirMetaModels = (xktFiles, done, error) => { // Load XKTs, ignore metamodels in the XKT
let i = 0;
const loadNext = () => {
if (sceneModel.destroyed) {
done();
} else if (i >= xktFiles.length) {
done();
} else {
this._dataSource.getXKT(`${baseDir}${xktFiles[i]}`, (arrayBuffer) => {
this._parseModel(arrayBuffer, options, sceneModel, null /* Ignore metamodel in XKT */, manifestCtx);
sceneModel.preFinalize();
i++;
this.scheduleTask(loadNext, 200);
}, error);
}
}
loadNext();
};
const loadXKTs_includeTheirMetaModels = (xktFiles, done, error) => { // Load XKTs, parse metamodels from the XKT
let i = 0;
const loadNext = () => {
if (sceneModel.destroyed) {
done();
} else if (i >= xktFiles.length) {
done();
} else {
this._dataSource.getXKT(`${baseDir}${xktFiles[i]}`, (arrayBuffer) => {
this._parseModel(arrayBuffer, options, sceneModel, metaModel, manifestCtx);
sceneModel.preFinalize();
i++;
this.scheduleTask(loadNext, 200);
}, error);
}
}
loadNext();
};
if (params.manifest) {
const manifestData = params.manifest;
const xktFiles = manifestData.xktFiles;
if (!xktFiles || xktFiles.length === 0) {
error(`load(): Failed to load model manifest - manifest not valid`);
return;
}
const metaModelFiles = manifestData.metaModelFiles;
if (metaModelFiles) {
loadJSONs(metaModelFiles, () => {
loadXKTs_excludeTheirMetaModels(xktFiles, finish, error);
}, error);
} else {
loadXKTs_includeTheirMetaModels(xktFiles, finish, error);
}
} else {
this._dataSource.getManifest(params.manifestSrc, (manifestData) => {
if (sceneModel.destroyed) {
return;
}
const xktFiles = manifestData.xktFiles;
if (!xktFiles || xktFiles.length === 0) {
error(`load(): Failed to load model manifest - manifest not valid`);
return;
}
const metaModelFiles = manifestData.metaModelFiles;
if (metaModelFiles) {
loadJSONs(metaModelFiles, () => {
loadXKTs_excludeTheirMetaModels(xktFiles, finish, error);
}, error);
} else {
loadXKTs_includeTheirMetaModels(xktFiles, finish, error);
}
}, error);
}
}
}
return sceneModel;
}
_loadModel(src, options, sceneModel, metaModel, manifestCtx, done, error) {
this._dataSource.getXKT(src, (arrayBuffer) => {
this._parseModel(arrayBuffer, options, sceneModel, metaModel, manifestCtx);
sceneModel.preFinalize();
done();
}, error);
}
async _parseModel(arrayBuffer, options, sceneModel, metaModel, manifestCtx) {
if (sceneModel.destroyed) {
return;
}
const dataView = new DataView(arrayBuffer);
const dataArray = new Uint8Array(arrayBuffer);
const firstUint = dataView.getUint32(0, true);
const xktVersion = firstUint & 0x7fffffff;
const zipped = (xktVersion < 11) || ((xktVersion >= 12) && (firstUint >>> 31));
const parser = parsers[xktVersion];
if (!parser) {
this.error("Unsupported .XKT file version: " + xktVersion + " - this XKTLoaderPlugin supports versions " + Object.keys(parsers));
return;
}
// this.log("Loading .xkt V" + xktVersion);
if (!zipped) {
parser.parseArrayBuffer(this.viewer, options, arrayBuffer, sceneModel, metaModel, manifestCtx);
return;
}
const numElements = dataView.getUint32(4, true);
const elements = [];
let byteOffset = (numElements + 2) * 4;
for (let i = 0; i < numElements; i++) {
const elementSize = dataView.getUint32((i + 2) * 4, true);
elements.push(dataArray.subarray(byteOffset, byteOffset + elementSize));
byteOffset += elementSize;
}
parser.parse(this.viewer, options, elements, sceneModel, metaModel, manifestCtx);
}
}
function getBaseDirectory(filePath) {
if (filePath.indexOf('?') > -1) {
filePath = filePath.split('?')[0];
}
const pathArray = filePath.split('/');
pathArray.pop(); // Remove the file name or the last segment of the path
return pathArray.join('/') + '/';
}
export {XKTLoaderPlugin}
