xeokit-viewer
Version:
BIM viewer built on xeokit and Bootstrap
300 lines (280 loc) • 12.5 kB
JavaScript
import {Plugin} from "../../viewer/Plugin.js";
import {DistanceMeasurement} from "./DistanceMeasurement.js";
import {DistanceMeasurementsControl} from "./DistanceMeasurementsControl.js";
/**
* {@link Viewer} plugin for measuring point-to-point distances.
*
* [<img src="https://user-images.githubusercontent.com/83100/63047331-867a0a80-bed4-11e9-892f-398740013c5f.gif">](https://xeokit.github.io/xeokit-sdk/examples/#measurements_distance_createWithMouse)
*
* * [[Example 1: Model with distance measurements](https://xeokit.github.io/xeokit-sdk/examples/#measurements_distance_modelWithMeasurements)]
* * [[Example 2: Create distance measurements with mouse](https://xeokit.github.io/xeokit-sdk/examples/#measurements_distance_createWithMouse)]
* * [[Example 3: Configuring units and scale](https://xeokit.github.io/xeokit-sdk/examples/#measurements_distance_unitsAndScale)]
*
* ## Overview
*
* * A {@link DistanceMeasurement} represents a point-to-point measurement between two 3D points on one or two {@link Entity}s.
* * As shown on the screen capture above, a DistanceMeasurement has one wire (light blue) that shows the direct point-to-point measurement,
* and three more wires (red, green and blue) that show the distance on each of the World-space X, Y and Z axis.
* * Create DistanceMeasurements programmatically with {@link DistanceMeasurementsPlugin#createMeasurement}.
* * Create DistanceMeasurements interactively using the {@link DistanceMeasurementsControl}, located at {@link DistanceMeasurementsPlugin#control}.
* * Existing DistanceMeasurements are registered by ID in {@link DistanceMeasurementsPlugin#measurements}.
* * Destroy DistanceMeasurements using {@link DistanceMeasurementsPlugin#destroyMeasurement}.
* * Configure global measurement units and scale via {@link Metrics}, located at {@link Scene#metrics}.
*
* ## Example 1: Creating DistanceMeasurements Programmatically
*
* In our first example, we'll use an {@link XKTLoaderPlugin} to load a model, and then use a DistanceMeasurementsPlugin to programmatically create two {@link DistanceMeasurement}s.
*
* Note how each DistanceMeasurement has ````origin```` and ````target```` endpoints, which each indicate a 3D World-space
* position on the surface of an {@link Entity}. The endpoints can be attached to the same Entity, or to different Entitys.
*
* [[Run example](https://xeokit.github.io/xeokit-sdk/examples/#measurements_distance_modelWithMeasurements)]
*
* ````JavaScript
* import {Viewer} from "../src/viewer/Viewer.js";
* import {XKTLoaderPlugin} from "../src/plugins/XKTLoaderPlugin/XKTLoaderPlugin.js";
* import {DistanceMeasurementsPlugin} from "../src/plugins/DistanceMeasurementsPlugin/DistanceMeasurementsPlugin.js";
*
* const viewer = new Viewer({
* canvasId: "myCanvas",
* transparent: true
* });
*
* viewer.scene.camera.eye = [-2.37, 18.97, -26.12];
* viewer.scene.camera.look = [10.97, 5.82, -11.22];
* viewer.scene.camera.up = [0.36, 0.83, 0.40];
*
* const xktLoader = new XKTLoaderPlugin(viewer);
*
* const distanceMeasurements = new DistanceMeasurementsPlugin(viewer);
*
* const model = xktLoader.load({
* src: "./models/xkt/duplex/duplex.xkt"
* });
*
* model.on("loaded", () => {
*
* const myMeasurement1 = distanceMeasurements.createMeasurement({
* id: "distanceMeasurement1",
* origin: {
* entity: viewer.scene.objects["2O2Fr$t4X7Zf8NOew3FLOH"],
* worldPos: [0.044, 5.998, 17.767]
* },
* target: {
* entity: viewer.scene.objects["2O2Fr$t4X7Zf8NOew3FLOH"],
* worldPos: [4.738, 3.172, 17.768]
* },
* visible: true,
* wireVisible: true
* });
*
* const myMeasurement2 = distanceMeasurements.createMeasurement({
* id: "distanceMeasurement2",
* origin: {
* entity: viewer.scene.objects["2O2Fr$t4X7Zf8NOew3FNr2"],
* worldPos: [0.457, 2.532, 17.766]
* },
* target: {
* entity: viewer.scene.objects["1CZILmCaHETO8tf3SgGEXu"],
* worldPos: [0.436, 0.001, 22.135]
* },
* visible: true,
* wireVisible: true
* });
* });
* ````
*
* ## Example 2: Creating DistanceMeasurements Interactively
*
* In our second example, we'll use an {@link XKTLoaderPlugin} to load a model, then we'll use the DistanceMeasurementPlugin's {@link DistanceMeasurementsControl} to interactively create {@link DistanceMeasurement}s with mouse or touch input.
*
* After we've activated the DistanceMeasurementsControl, the first click on any {@link Entity} begins constructing a DistanceMeasurement, fixing its
* origin to that Entity. The next click on any Entity will complete the DistanceMeasurement, fixing its target to that second Entity.
*
* The DistanceMeasurementControl will then wait for the next click on any Entity, to begin constructing
* another DistanceMeasurement, and so on, until deactivated again.
*
* [[Run example](https://xeokit.github.io/xeokit-sdk/examples/#measurements_distance_createWithMouse)]
*
* ````JavaScript
* import {Viewer} from "../src/viewer/Viewer.js";
* import {XKTLoaderPlugin} from "../src/plugins/XKTLoaderPlugin/XKTLoaderPlugin.js";
* import {DistanceMeasurementsPlugin} from "../src/plugins/DistanceMeasurementsPlugin/DistanceMeasurementsPlugin.js";
*
* const viewer = new Viewer({
* canvasId: "myCanvas",
* transparent: true
* });
*
* viewer.scene.camera.eye = [-2.37, 18.97, -26.12];
* viewer.scene.camera.look = [10.97, 5.82, -11.22];
* viewer.scene.camera.up = [0.36, 0.83, 0.40];
*
* const xktLoader = new XKTLoaderPlugin(viewer);
*
* const distanceMeasurements = new DistanceMeasurementsPlugin(viewer);
*
* const model = xktLoader.load({
* src: "./models/xkt/duplex/duplex.xkt"
* });
*
* distanceMeasurements.control.activate(); // <------------ Activate the DistanceMeasurementsControl
* ````
*
* ## Example 3: Configuring Measurement Units and Scale
*
* In our third example, we'll use the {@link Scene}'s {@link Metrics} to set the global unit of measurement to ````"meters"````. We'll also specify that a unit within the World-space coordinate system represents ten meters.
*
* The wires belonging to our DistanceMeasurements show their lengths in Real-space coordinates, in the current unit of measurement. They will dynamically update as we set these configurations.
*
* * [[Run example](https://xeokit.github.io/xeokit-sdk/examples/#measurements_distance_unitsAndScale)]
*
* ````JavaScript
* const metrics = viewer.scene.metrics;
* metrics.units = "meters";
* metrics.scale = 10.0;
* ````
*/
class DistanceMeasurementsPlugin extends Plugin {
/**
* @constructor
* @param {Viewer} viewer The Viewer.
* @param {Object} [cfg] Plugin configuration.
* @param {String} [cfg.id="DistanceMeasurements"] Optional ID for this plugin, so that we can find it within {@link Viewer#plugins}.
* @param {Number} [cfg.labelMinAxisLength=25] The minimum length, in pixels, of an axis wire beyond which its label is shown.
* @param {HTMLElement} [cfg.container] Container DOM element for markers and labels. Defaults to ````document.body````.
*/
constructor(viewer, cfg = {}) {
super("DistanceMeasurements", viewer);
this._container = cfg.container || document.body;
this._control = new DistanceMeasurementsControl(this);
this._measurements = {};
this.labelMinAxisLength = cfg.labelMinAxisLength;
}
/**
* @private
*/
send(name, value) {
}
/**
* Gets the {@link DistanceMeasurementsControl}, which creates {@link DistanceMeasurement}s from user input.
*
* @type {DistanceMeasurementsControl}
*/
get control() {
return this._control;
}
/**
* Gets the existing {@link DistanceMeasurement}s, each mapped to its {@link DistanceMeasurement#id}.
*
* @type {{String:DistanceMeasurement}}
*/
get measurements() {
return this._measurements;
}
/**
* Sets the minimum length, in pixels, of an axis wire beyond which its label is shown.
*
* The axis wire's label is not shown when its length is less than this value.
*
* This is ````25```` pixels by default.
*
* Must not be less than ````1````.
*
* @type {number}
*/
set labelMinAxisLength(labelMinAxisLength) {
if (labelMinAxisLength < 1) {
this.error("labelMinAxisLength must be >= 1; defaulting to 25");
labelMinAxisLength = 25;
}
this._labelMinAxisLength = labelMinAxisLength || 25;
}
/**
* Gets the minimum length, in pixels, of an axis wire beyond which its label is shown.
* @returns {number}
*/
get labelMinAxisLength() {
return this._labelMinAxisLength;
}
/**
* Creates a {@link DistanceMeasurement}.
*
* The DistanceMeasurement is then registered by {@link DistanceMeasurement#id} in {@link DistanceMeasurementsPlugin#measurements}.
*
* @param {Object} params {@link DistanceMeasurement} configuration.
* @param {String} params.id Unique ID to assign to {@link DistanceMeasurement#id}. The DistanceMeasurement will be registered by this in {@link DistanceMeasurementsPlugin#measurements} and {@link Scene.components}. Must be unique among all components in the {@link Viewer}.
* @param {Number[]} params.origin.worldPos Origin World-space 3D position.
* @param {Entity} params.origin.entity Origin Entity.
* @param {Number[]} params.target.worldPos Target World-space 3D position.
* @param {Entity} params.target.entity Target Entity.
* @param {Boolean} [params.visible=true] Whether to initially show the {@link DistanceMeasurement}.
* @param {Boolean} [params.originVisible=true] Whether to initially show the {@link DistanceMeasurement} origin.
* @param {Boolean} [params.targetVisible=true] Whether to initially show the {@link DistanceMeasurement} target.
* @param {Boolean} [params.wireVisible=true] Whether to initially show the direct point-to-point wire between {@link DistanceMeasurement#origin} and {@link DistanceMeasurement#target}.
* @param {Boolean} [params.axisVisible=true] Whether to initially show the axis-aligned wires between {@link DistanceMeasurement#origin} and {@link DistanceMeasurement#target}.
* @returns {DistanceMeasurement} The new {@link DistanceMeasurement}.
*/
createMeasurement(params = {}) {
if (this.viewer.scene.components[params.id]) {
this.error("Viewer scene component with this ID already exists: " + params.id);
delete params.id;
}
const origin = params.origin;
const target = params.target;
const measurement = new DistanceMeasurement(this, {
id: params.id,
plugin: this,
container: this._container,
origin: {
entity: origin.entity,
worldPos: origin.worldPos
},
target: {
entity: target.entity,
worldPos: target.worldPos
},
visible: params.visible,
wireVisible: params.wireVisible,
originVisible: params.originVisible,
targetVisible: params.targetVisible,
});
this._measurements[measurement.id] = measurement;
measurement.on("destroyed", () => {
delete this._measurements[measurement.id];
});
return measurement;
}
/**
* Destroys a {@link DistanceMeasurement}.
*
* @param {String} id ID of DistanceMeasurement to destroy.
*/
destroyMeasurement(id) {
const measurement = this._measurements[id];
if (!measurement) {
this.log("DistanceMeasurement not found: " + id);
return;
}
measurement.destroy();
}
/**
* Destroys all {@link DistanceMeasurement}s.
*/
clear() {
const ids = Object.keys(this._measurements);
for (var i = 0, len = ids.length; i < len; i++) {
this.destroyMeasurement(ids[i]);
}
}
/**
* Destroys this DistanceMeasurementsPlugin.
*
* Destroys all {@link DistanceMeasurement}s first.
*/
destroy() {
this.clear();
super.destroy();
}
}
export {DistanceMeasurementsPlugin}