playcanvas/build/playcanvas.prf/src/framework/xr/xr-input.js

PlayCanvas WebGL game engine

import { EventHandler } from '../../core/event-handler.js';
import { platform } from '../../core/platform.js';
import { XrInputSource } from './xr-input-source.js';

class XrInput extends EventHandler {
		static{
				this.EVENT_ADD = 'add';
		}
		static{
				this.EVENT_REMOVE = 'remove';
		}
		static{
				this.EVENT_SELECT = 'select';
		}
		static{
				this.EVENT_SELECTSTART = 'selectstart';
		}
		static{
				this.EVENT_SELECTEND = 'selectend';
		}
		static{
				this.EVENT_SQUEEZE = 'squeeze';
		}
		static{
				this.EVENT_SQUEEZESTART = 'squeezestart';
		}
		static{
				this.EVENT_SQUEEZEEND = 'squeezeend';
		}
		constructor(manager){
				super(), this._inputSources = [], this.velocitiesSupported = false;
				this.manager = manager;
				this.velocitiesSupported = !!(platform.browser && window.XRPose?.prototype?.hasOwnProperty('linearVelocity'));
				this._onInputSourcesChangeEvt = (evt)=>{
						this._onInputSourcesChange(evt);
				};
				this.manager.on('start', this._onSessionStart, this);
				this.manager.on('end', this._onSessionEnd, this);
		}
		_onSessionStart() {
				const session = this.manager.session;
				session.addEventListener('inputsourceschange', this._onInputSourcesChangeEvt);
				session.addEventListener('select', (evt)=>{
						const inputSource = this._getByInputSource(evt.inputSource);
						inputSource.update(evt.frame);
						inputSource.fire('select', evt);
						this.fire('select', inputSource, evt);
				});
				session.addEventListener('selectstart', (evt)=>{
						const inputSource = this._getByInputSource(evt.inputSource);
						inputSource.update(evt.frame);
						inputSource._selecting = true;
						inputSource.fire('selectstart', evt);
						this.fire('selectstart', inputSource, evt);
				});
				session.addEventListener('selectend', (evt)=>{
						const inputSource = this._getByInputSource(evt.inputSource);
						inputSource.update(evt.frame);
						inputSource._selecting = false;
						inputSource.fire('selectend', evt);
						this.fire('selectend', inputSource, evt);
				});
				session.addEventListener('squeeze', (evt)=>{
						const inputSource = this._getByInputSource(evt.inputSource);
						inputSource.update(evt.frame);
						inputSource.fire('squeeze', evt);
						this.fire('squeeze', inputSource, evt);
				});
				session.addEventListener('squeezestart', (evt)=>{
						const inputSource = this._getByInputSource(evt.inputSource);
						inputSource.update(evt.frame);
						inputSource._squeezing = true;
						inputSource.fire('squeezestart', evt);
						this.fire('squeezestart', inputSource, evt);
				});
				session.addEventListener('squeezeend', (evt)=>{
						const inputSource = this._getByInputSource(evt.inputSource);
						inputSource.update(evt.frame);
						inputSource._squeezing = false;
						inputSource.fire('squeezeend', evt);
						this.fire('squeezeend', inputSource, evt);
				});
				const inputSources = session.inputSources;
				for(let i = 0; i < inputSources.length; i++){
						this._addInputSource(inputSources[i]);
				}
		}
		_onSessionEnd() {
				let i = this._inputSources.length;
				while(i--){
						const inputSource = this._inputSources[i];
						this._inputSources.splice(i, 1);
						inputSource.fire('remove');
						this.fire('remove', inputSource);
				}
				const session = this.manager.session;
				session.removeEventListener('inputsourceschange', this._onInputSourcesChangeEvt);
		}
		_onInputSourcesChange(evt) {
				for(let i = 0; i < evt.removed.length; i++){
						this._removeInputSource(evt.removed[i]);
				}
				for(let i = 0; i < evt.added.length; i++){
						this._addInputSource(evt.added[i]);
				}
		}
		_getByInputSource(xrInputSource) {
				for(let i = 0; i < this._inputSources.length; i++){
						if (this._inputSources[i].inputSource === xrInputSource) {
								return this._inputSources[i];
						}
				}
				return null;
		}
		_addInputSource(xrInputSource) {
				if (this._getByInputSource(xrInputSource)) {
						return;
				}
				const inputSource = new XrInputSource(this.manager, xrInputSource);
				this._inputSources.push(inputSource);
				this.fire('add', inputSource);
		}
		_removeInputSource(xrInputSource) {
				for(let i = 0; i < this._inputSources.length; i++){
						if (this._inputSources[i].inputSource !== xrInputSource) {
								continue;
						}
						const inputSource = this._inputSources[i];
						this._inputSources.splice(i, 1);
						let h = inputSource.hitTestSources.length;
						while(h--){
								inputSource.hitTestSources[h].remove();
						}
						inputSource.fire('remove');
						this.fire('remove', inputSource);
						return;
				}
		}
		update(frame) {
				for(let i = 0; i < this._inputSources.length; i++){
						this._inputSources[i].update(frame);
				}
		}
		get inputSources() {
				return this._inputSources;
		}
}

export { XrInput };