three
Version:
JavaScript 3D library
140 lines (82 loc) • 3.03 kB
JavaScript
import { Vector3 } from '../math/Vector3.js';
import { Quaternion } from '../math/Quaternion.js';
import { Clock } from '../core/Clock.js';
import { Object3D } from '../core/Object3D.js';
import { AudioContext } from './AudioContext.js';
const _position = new Vector3();
const _quaternion = new Quaternion();
const _scale = new Vector3();
const _orientation = new Vector3();
function AudioListener() {
Object3D.call( this );
this.type = 'AudioListener';
this.context = AudioContext.getContext();
this.gain = this.context.createGain();
this.gain.connect( this.context.destination );
this.filter = null;
this.timeDelta = 0;
// private
this._clock = new Clock();
}
AudioListener.prototype = Object.assign( Object.create( Object3D.prototype ), {
constructor: AudioListener,
getInput: function () {
return this.gain;
},
removeFilter: function ( ) {
if ( this.filter !== null ) {
this.gain.disconnect( this.filter );
this.filter.disconnect( this.context.destination );
this.gain.connect( this.context.destination );
this.filter = null;
}
return this;
},
getFilter: function () {
return this.filter;
},
setFilter: function ( value ) {
if ( this.filter !== null ) {
this.gain.disconnect( this.filter );
this.filter.disconnect( this.context.destination );
} else {
this.gain.disconnect( this.context.destination );
}
this.filter = value;
this.gain.connect( this.filter );
this.filter.connect( this.context.destination );
return this;
},
getMasterVolume: function () {
return this.gain.gain.value;
},
setMasterVolume: function ( value ) {
this.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );
return this;
},
updateMatrixWorld: function ( force ) {
Object3D.prototype.updateMatrixWorld.call( this, force );
const listener = this.context.listener;
const up = this.up;
this.timeDelta = this._clock.getDelta();
this.matrixWorld.decompose( _position, _quaternion, _scale );
_orientation.set( 0, 0, - 1 ).applyQuaternion( _quaternion );
if ( listener.positionX ) {
// code path for Chrome (see #14393)
const endTime = this.context.currentTime + this.timeDelta;
listener.positionX.linearRampToValueAtTime( _position.x, endTime );
listener.positionY.linearRampToValueAtTime( _position.y, endTime );
listener.positionZ.linearRampToValueAtTime( _position.z, endTime );
listener.forwardX.linearRampToValueAtTime( _orientation.x, endTime );
listener.forwardY.linearRampToValueAtTime( _orientation.y, endTime );
listener.forwardZ.linearRampToValueAtTime( _orientation.z, endTime );
listener.upX.linearRampToValueAtTime( up.x, endTime );
listener.upY.linearRampToValueAtTime( up.y, endTime );
listener.upZ.linearRampToValueAtTime( up.z, endTime );
} else {
listener.setPosition( _position.x, _position.y, _position.z );
listener.setOrientation( _orientation.x, _orientation.y, _orientation.z, up.x, up.y, up.z );
}
}
} );
export { AudioListener };