all files / src/ DeviceOrientationControls.js

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/**
 * @author richt / http://richt.me
 * @author WestLangley / http://github.com/WestLangley
 *
 * W3C Device Orientation control (http://w3c.github.io/deviceorientation/spec-source-orientation.html)
 */
 
import {
	Euler,
	MathUtils,
	Quaternion,
	Vector3
} from "three";
 
var DeviceOrientationControls = function ( object ) {
 
	var scope = this;
 
	this.object = object;
	this.object.rotation.reorder( 'YXZ' );
 
	this.enabled = true;
 
	this.deviceOrientation = {};
	this.screenOrientation = 0;
 
	this.alphaOffset = 0; // radians
 
	var onDeviceOrientationChangeEvent = function ( event ) {
 
		scope.deviceOrientation = event;
 
	};
 
	var onScreenOrientationChangeEvent = function () {
 
		scope.screenOrientation = window.orientation || 0;
 
	};
 
	// The angles alpha, beta and gamma form a set of intrinsic Tait-Bryan angles of type Z-X'-Y''
 
	var setObjectQuaternion = function () {
 
		var zee = new Vector3( 0, 0, 1 );
 
		var euler = new Euler();
 
		var q0 = new Quaternion();
 
		var q1 = new Quaternion( - Math.sqrt( 0.5 ), 0, 0, Math.sqrt( 0.5 ) ); // - PI/2 around the x-axis
 
		return function ( quaternion, alpha, beta, gamma, orient ) {
 
			euler.set( beta, alpha, - gamma, 'YXZ' ); // 'ZXY' for the device, but 'YXZ' for us
 
			quaternion.setFromEuler( euler ); // orient the device
 
			quaternion.multiply( q1 ); // camera looks out the back of the device, not the top
 
			quaternion.multiply( q0.setFromAxisAngle( zee, - orient ) ); // adjust for screen orientation
 
		};
 
	}();
 
	this.connect = function () {
 
		onScreenOrientationChangeEvent(); // run once on load
 
		// iOS 13+
 
		if ( window.DeviceOrientationEvent !== undefined && typeof window.DeviceOrientationEvent.requestPermission === 'function' ) {
 
			window.DeviceOrientationEvent.requestPermission().then( function ( response ) {
 
				if ( response == 'granted' ) {
 
					window.addEventListener( 'orientationchange', onScreenOrientationChangeEvent, false );
					window.addEventListener( 'deviceorientation', onDeviceOrientationChangeEvent, false );
 
				}
 
			} ).catch( function ( error ) {
 
				console.error( 'THREE.DeviceOrientationControls: Unable to use DeviceOrientation API:', error );
 
			} );
 
		} else {
 
			window.addEventListener( 'orientationchange', onScreenOrientationChangeEvent, false );
			window.addEventListener( 'deviceorientation', onDeviceOrientationChangeEvent, false );
 
		}
 
		scope.enabled = true;
 
	};
 
	this.disconnect = function () {
 
		window.removeEventListener( 'orientationchange', onScreenOrientationChangeEvent, false );
		window.removeEventListener( 'deviceorientation', onDeviceOrientationChangeEvent, false );
 
		scope.enabled = false;
 
	};
 
	this.update = function () {
 
		if ( scope.enabled === false ) return;
 
		var device = scope.deviceOrientation;
 
		if ( device ) {
 
			var alpha = device.alpha ? MathUtils.degToRad( device.alpha ) + scope.alphaOffset : 0; // Z
 
			var beta = device.beta ? MathUtils.degToRad( device.beta ) : 0; // X'
 
			var gamma = device.gamma ? MathUtils.degToRad( device.gamma ) : 0; // Y''
 
			var orient = scope.screenOrientation ? MathUtils.degToRad( scope.screenOrientation ) : 0; // O
 
			setObjectQuaternion( scope.object.quaternion, alpha, beta, gamma, orient );
 
		}
 
 
	};
 
	this.dispose = function () {
 
		scope.disconnect();
 
	};
 
	this.connect();
 
};
 
export { DeviceOrientationControls };