playcanvas/build/playcanvas/src/framework/xr/xr-plane-detection.js

PlayCanvas WebGL game engine

import { platform } from '../../core/platform.js';
import { EventHandler } from '../../core/event-handler.js';
import { XrPlane } from './xr-plane.js';

class XrPlaneDetection extends EventHandler {
		_onSessionStart() {
				if (this._manager.session.enabledFeatures) {
						var available = this._manager.session.enabledFeatures.indexOf('plane-detection') !== -1;
						if (available) {
								this._available = true;
								this.fire('available');
						}
				}
		}
		_onSessionEnd() {
				for(var i = 0; i < this._planes.length; i++){
						this._planes[i].destroy();
						this.fire('remove', this._planes[i]);
				}
				this._planesIndex.clear();
				this._planes.length = 0;
				if (this._available) {
						this._available = false;
						this.fire('unavailable');
				}
		}
		update(frame) {
				if (!this._available) {
						if (!this._manager.session.enabledFeatures && frame.detectedPlanes.size) {
								this._available = true;
								this.fire('available');
						} else {
								return;
						}
				}
				var detectedPlanes = frame.detectedPlanes;
				for (var [xrPlane, plane] of this._planesIndex){
						if (detectedPlanes.has(xrPlane)) {
								continue;
						}
						this._planesIndex.delete(xrPlane);
						this._planes.splice(this._planes.indexOf(plane), 1);
						plane.destroy();
						this.fire('remove', plane);
				}
				for (var xrPlane1 of detectedPlanes){
						var plane1 = this._planesIndex.get(xrPlane1);
						if (!plane1) {
								plane1 = new XrPlane(this, xrPlane1);
								this._planesIndex.set(xrPlane1, plane1);
								this._planes.push(plane1);
								plane1.update(frame);
								this.fire('add', plane1);
						} else {
								plane1.update(frame);
						}
				}
		}
		get supported() {
				return this._supported;
		}
		get available() {
				return this._available;
		}
		get planes() {
				return this._planes;
		}
		constructor(manager){
				super(), this._supported = platform.browser && !!window.XRPlane, this._available = false, this._planesIndex = new Map(), this._planes = [];
				this._manager = manager;
				if (this._supported) {
						this._manager.on('start', this._onSessionStart, this);
						this._manager.on('end', this._onSessionEnd, this);
				}
		}
}
XrPlaneDetection.EVENT_AVAILABLE = 'available';
XrPlaneDetection.EVENT_UNAVAILABLE = 'unavailable';
XrPlaneDetection.EVENT_ADD = 'add';
XrPlaneDetection.EVENT_REMOVE = 'remove';

export { XrPlaneDetection };