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147 lines
3.7 KiB
147 lines
3.7 KiB
( function () {
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const _zee = new THREE.Vector3( 0, 0, 1 );
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const _euler = new THREE.Euler();
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const _q0 = new THREE.Quaternion();
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const _q1 = new THREE.Quaternion( - Math.sqrt( 0.5 ), 0, 0, Math.sqrt( 0.5 ) ); // - PI/2 around the x-axis
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const _changeEvent = {
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type: 'change'
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};
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class DeviceOrientationControls extends THREE.EventDispatcher {
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constructor( object ) {
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super();
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if ( window.isSecureContext === false ) {
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console.error( 'THREE.DeviceOrientationControls: DeviceOrientationEvent is only available in secure contexts (https)' );
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}
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const scope = this;
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const EPS = 0.000001;
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const lastQuaternion = new THREE.Quaternion();
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this.object = object;
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this.object.rotation.reorder( 'YXZ' );
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this.enabled = true;
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this.deviceOrientation = {};
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this.screenOrientation = 0;
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this.alphaOffset = 0; // radians
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const onDeviceOrientationChangeEvent = function ( event ) {
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scope.deviceOrientation = event;
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};
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const onScreenOrientationChangeEvent = function () {
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scope.screenOrientation = window.orientation || 0;
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}; // The angles alpha, beta and gamma form a set of intrinsic Tait-Bryan angles of type Z-X'-Y''
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const setObjectQuaternion = function ( quaternion, alpha, beta, gamma, orient ) {
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_euler.set( beta, alpha, - gamma, 'YXZ' ); // 'ZXY' for the device, but 'YXZ' for us
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quaternion.setFromEuler( _euler ); // orient the device
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quaternion.multiply( _q1 ); // camera looks out the back of the device, not the top
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quaternion.multiply( _q0.setFromAxisAngle( _zee, - orient ) ); // adjust for screen orientation
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};
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this.connect = function () {
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onScreenOrientationChangeEvent(); // run once on load
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// iOS 13+
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if ( window.DeviceOrientationEvent !== undefined && typeof window.DeviceOrientationEvent.requestPermission === 'function' ) {
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window.DeviceOrientationEvent.requestPermission().then( function ( response ) {
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if ( response == 'granted' ) {
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window.addEventListener( 'orientationchange', onScreenOrientationChangeEvent );
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window.addEventListener( 'deviceorientation', onDeviceOrientationChangeEvent );
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}
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} ).catch( function ( error ) {
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console.error( 'THREE.DeviceOrientationControls: Unable to use DeviceOrientation API:', error );
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} );
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} else {
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window.addEventListener( 'orientationchange', onScreenOrientationChangeEvent );
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window.addEventListener( 'deviceorientation', onDeviceOrientationChangeEvent );
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}
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scope.enabled = true;
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};
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this.disconnect = function () {
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window.removeEventListener( 'orientationchange', onScreenOrientationChangeEvent );
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window.removeEventListener( 'deviceorientation', onDeviceOrientationChangeEvent );
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scope.enabled = false;
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};
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this.update = function () {
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if ( scope.enabled === false ) return;
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const device = scope.deviceOrientation;
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if ( device ) {
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const alpha = device.alpha ? THREE.MathUtils.degToRad( device.alpha ) + scope.alphaOffset : 0; // Z
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const beta = device.beta ? THREE.MathUtils.degToRad( device.beta ) : 0; // X'
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const gamma = device.gamma ? THREE.MathUtils.degToRad( device.gamma ) : 0; // Y''
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const orient = scope.screenOrientation ? THREE.MathUtils.degToRad( scope.screenOrientation ) : 0; // O
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setObjectQuaternion( scope.object.quaternion, alpha, beta, gamma, orient );
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if ( 8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ) {
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lastQuaternion.copy( scope.object.quaternion );
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scope.dispatchEvent( _changeEvent );
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}
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}
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};
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this.dispose = function () {
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scope.disconnect();
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};
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this.connect();
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}
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}
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THREE.DeviceOrientationControls = DeviceOrientationControls;
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} )();
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