@xeokit/xeokit-sdk
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3D BIM IFC Viewer SDK for AEC engineering applications. Open Source JavaScript Toolkit based on pure WebGL for top performance, real-world coordinates and full double precision
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JavaScript
import {utils} from "../../viewer/scene/utils.js"
import {Node} from "../../viewer/scene/nodes/Node.js";
import {Plugin} from "../../viewer/Plugin.js";
import {XML3DSceneGraphLoader} from "./XML3DSceneGraphLoader.js";
/**
* {@link Viewer} plugin that loads models from [3DXML](https://en.wikipedia.org/wiki/3DXML) files.
*
* [<img src="https://xeokit.io/img/docs/XML3DLoaderPlugin/XML3DPluginTreeView.png">](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_3DXML_TreeView)
*
* [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_3DXML_TreeView)]
*
* ## Overview
*
* * Currently supports 3DXML V4.2.
* * Creates an {@link Entity} representing each model it loads, which will have {@link Entity#isModel} set ````true```` and will be registered by {@link Entity#id} in {@link Scene#models}.
* * Creates an {@link Entity} for each object within the model, which will have {@link Entity#isObject} set ````true```` and will be registered by {@link Entity#id} in {@link Scene#objects}.
* * When loading, can set the World-space position, scale and rotation of each model within World space, along with initial properties for all the model's {@link Entity}s.
* * Can optionally load a {@link MetaModel} to classify the objects within the model, from which you can create a tree view using the {@link TreeViewPlugin}.
* <br>
* Note that the name of this plugin is intentionally munged to "XML3D" because a JavaScript class name cannot begin with a numeral.
*
* An 3DXML model is a zip archive that bundles multiple XML files and assets. Internally, the XML3DLoaderPlugin uses the
* [zip.js](https://gildas-lormeau.github.io/zip.js/) library to unzip them before loading. The zip.js library uses
* [Web workers](https://www.w3.org/TR/workers/) for fast unzipping, so XML3DLoaderPlugin requires that we configure it
* with a ````workerScriptsPath```` property specifying the directory where zip.js keeps its Web worker script. See
* the example for how to do that.
*
* ## Usage
*
* In the example below, we'll use an XML3DLoaderPlugin to load a 3DXML model. When the model has loaded,
* we'll use the {@link CameraFlightAnimation} to fly the {@link Camera} to look at boundary of the model. We'll
* then get the model's {@link Entity} from the {@link Scene} and highlight the whole model.
*
* * [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_3DXML_Widget)]
*
* ````javascript
* // Create a xeokit Viewer
* const viewer = new Viewer({
* canvasId: "myCanvas"
* });
*
* // Add an XML3DLoaderPlugin to the Viewer
* var plugin = new XML3DLoaderPlugin(viewer, {
* id: "XML3DLoader", // Default value
* workerScriptsPath : "../../src/plugins/XML3DLoader/zipjs/" // Path to zip.js workers dir
* });
*
* // Load the 3DXML model
* var model = plugin.load({ // Model is an Entity
* id: "myModel",
* src: "./models/xml3d/3dpreview.3dxml",
* scale: [0.1, 0.1, 0.1],
* rotate: [90, 0, 0],
* translate: [100,0,0],
* edges: true
* });
*
* // When the model has loaded, fit it to view
* model.on("loaded", function() {
* viewer.cameraFlight.flyTo(model);
* });
*
* // Update properties of the model via the entity
* model.highlighted = true;
*
* // Find the model Entity by ID
* model = viewer.scene.models["myModel"];
*
* // Destroy the model
* model.destroy();
* ````
* ## Loading MetaModels
*
* We have the option to load a {@link MetaModel} that contains a hierarchy of {@link MetaObject}s that classifes the objects within
* our 3DXML model.
*
* This is useful for building a tree view to navigate the objects, using {@link TreeViewPlugin}.
*
* Let's load the model again, this time creating a MetaModel:
*
* ````javascript
* var model = plugin.load({
* id: "myModel",
* src: "./models/xml3d/3dpreview.3dxml",
* scale: [0.1, 0.1, 0.1],
* rotate: [90, 0, 0],
* translate: [100,0,0],
* edges: true,
*
* createMetaModel: true // <<-------- Create a MetaModel
* });
* ````
*
* The MetaModel can then be found on the {@link Viewer}'s {@link MetaScene}, using the model's ID:
*
* ````javascript
* const metaModel = viewer.metaScene.metaModels["myModel"];
* ````
*
* Now we can use {@link TreeViewPlugin} to create a tree view to navigate our model's objects:
*
* ````javascript
* import {TreeViewPlugin} from "xeokit-sdk.es.js""xeokit-sdk.es.js";
*
* const treeView = new TreeViewPlugin(viewer, {
* containerElement: document.getElementById("myTreeViewContainer")
* });
*
* const treeView = new TreeViewPlugin(viewer, {
* containerElement: document.getElementById("treeViewContainer"),
* autoExpandDepth: 3, // Initially expand tree three storeys deep
* hierarchy: "containment",
* autoAddModels: false
* });
*
* model.on("loaded", () => {
* treeView.addModel(model.id);
* });
* ````
*
* Note that only the TreeViewPlugin "containment" hierarchy makes sense for an XML3D model. A "types" hierarchy
* does not make sense because XML3DLoaderPlugin will set each {@link MetaObject#type} to "Default", and "storeys"
* does not make sense because that requires some of the MetaObject#type values to be "IfcBuildingStorey".
*
* * [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_3DXML_TreeView)]
*
* ## Material Type
*
* Although 3DXML only supports Phong materials, XML3DLoaderPlugin is able to convert them to physically-based materials.
*
* The plugin supports three material types:
*
* | Material Type | Material Components Loaded | Description | Example |
* |:--------:|:----:|:-----:|:-----:|
* | "PhongMaterial" (default) | {@link PhongMaterial} | Non-physically-correct Blinn-Phong shading model | [Run example](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_3DXML_materialType_Phong) |
* | "MetallicMaterial" | {@link MetallicMaterial} | Physically-accurate specular-glossiness shading model | [Run example](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_3DXML_materialType_Metallic) |
* | "SpecularMaterial" | {@link SpecularMaterial} | Physically-accurate metallic-roughness shading model | [Run example](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_3DXML_materialType_Specular) |
*
* <br>
* Let's load our model again, this time converting the 3DXML Blinn-Phong materials to {@link SpecularMaterial}s:
*
* ````javascript
* var model = plugin.load({ // Model is an Entity
* id: "myModel",
* src: "./models/xml3d/3dpreview.3dxml",
* materialtype: "SpecularMaterial": true"
* });
* ````
*
* * [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#loading_3DXML_materialType_Specular)]
*
* @class XML3DLoaderPlugin
*/
class XML3DLoaderPlugin extends Plugin {
/**
* @constructor
* @param {Viewer} viewer The Viewer.
* @param {Object} cfg Plugin configuration.
* @param {String} [cfg.id="XML3DLoader"] Optional ID for this plugin, so that we can find it within {@link Viewer#plugins}.
* @param {String} cfg.workerScriptsPath Path to the directory that contains the
* bundled [zip.js](https://gildas-lormeau.github.io/zip.js/) archive, which is a dependency of this plugin. This directory
* contains the script that is used by zip.js to instantiate Web workers, which assist with unzipping the 3DXML, which is a ZIP archive.
* @param {String} [cfg.materialType="PhongMaterial"] What type of materials to create while loading: "MetallicMaterial" to create {@link MetallicMaterial}s, "SpecularMaterial" to create {@link SpecularMaterial}s or "PhongMaterial" to create {@link PhongMaterial}s. As it loads XML3D's Phong materials, the XMLLoaderPlugin will do its best approximate conversion of those to the specified workflow.
* @param {Boolean} [cfg.createMetaModel=false] When true, will create a {@link MetaModel} for the model in {@link MetaScene#metaModels}.
*/
constructor(viewer, cfg = {}) {
super("XML3DLoader", viewer, cfg);
if (!cfg.workerScriptsPath) {
this.error("Config expected: workerScriptsPath");
return
}
this._workerScriptsPath = cfg.workerScriptsPath;
/**
* @private
*/
this._loader = new XML3DSceneGraphLoader(this, cfg);
/**
* Supported 3DXML schema versions
* @property supportedSchemas
* @type {string[]}
*/
this.supportedSchemas = this._loader.supportedSchemas;
}
/**
* Loads a 3DXML model from a file into this XML3DLoaderPlugin's {@link Viewer}.
*
* Creates a tree of {@link Entity}s within the Viewer's {@link Scene} that represents the model.
*
* @param {*} params Loading parameters.
* @param {String} params.id ID to assign to the model's root {@link Entity}, unique among all components in the Viewer's {@link Scene}.
* @param {String} [params.src] Path to a 3DXML file.
* @param {Boolean} [params.edges=false] Whether or not xeokit renders the {@link Entity} with edges emphasized.
* @param {Number[]} [params.position=[0,0,0]] The model's World-space 3D position.
* @param {Number[]} [params.scale=[1,1,1]] The model's World-space scale.
* @param {Number[]} [params.rotation=[0,0,0]] The model's World-space rotation, as Euler angles given 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.
* @param {Boolean} [params.backfaces=false] When true, allows visible backfaces, wherever specified in the 3DXML. When false, ignores backfaces.
* @param {Number} [params.edgeThreshold=20] When xraying, highlighting, selecting or edging, this is the threshold angle between normals of adjacent triangles, below which their shared wireframe edge is not drawn.
* @param {String} [params.materialType="PhongMaterial"] What type of materials to create while loading: "MetallicMaterial" to create {@link MetallicMaterial}s, "SpecularMaterial" to create {@link SpecularMaterial}s or "PhongMaterial" to create {@link PhongMaterial}s. As it loads XML3D's Phong materials, the XMLLoaderPlugin will do its best approximate conversion of those to the specified workflow.
* @param {Boolean} [params.createMetaModel=false] When true, will create a {@link MetaModel} for the model in {@link MetaScene#metaModels}.
* @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 = {}) {
params.workerScriptsPath = this._workerScriptsPath;
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;
}
const modelNode = new Node(this.viewer.scene, utils.apply(params, {
isModel: true
}));
const src = params.src;
if (!src) {
this.error("load() param expected: src");
return modelNode; // Return new empty model
}
this._loader.load(this, modelNode, src, params);
return modelNode;
}
}
export {XML3DLoaderPlugin}