} /** * Asynchronously probes for WebGL sync object completion. * * This function creates a promise that resolves when the WebGL sync object * signals completion or rejects if the sync operation fails. It uses polling * at the specified interval to check the sync status without blocking the * main thread. This is useful for GPU-CPU synchronization in WebGL contexts. * * @private * @param {WebGL2RenderingContext} gl - The WebGL rendering context. * @param {WebGLSync} sync - The WebGL sync object to wait for. * @param {number} interval - The polling interval in milliseconds. * @return {Promise} A promise that resolves when the sync completes or rejects if it fails. */ function probeAsync( gl, sync, interval ) { return new Promise( function ( resolve, reject ) { function probe() { switch ( gl.clientWaitSync( sync, gl.SYNC_FLUSH_COMMANDS_BIT, 0 ) ) { case gl.WAIT_FAILED: reject(); break; case gl.TIMEOUT_EXPIRED: setTimeout( probe, interval ); break; default: resolve(); } } setTimeout( probe, interval ); } ); } /** * Used to select the correct depth functions * when reversed depth buffer is used. * * @private * @type {Object} */ const ReversedDepthFuncs = { [ NeverDepth ]: AlwaysDepth, [ LessDepth ]: GreaterDepth, [ EqualDepth ]: NotEqualDepth, [ LessEqualDepth ]: GreaterEqualDepth, [ AlwaysDepth ]: NeverDepth, [ GreaterDepth ]: LessDepth, [ NotEqualDepth ]: EqualDepth, [ GreaterEqualDepth ]: LessEqualDepth, }; /** * This modules allows to dispatch event objects on custom JavaScript objects. * * Main repository: [eventdispatcher.js](https://github.com/mrdoob/eventdispatcher.js/) * * Code Example: * ```js * class Car extends EventDispatcher { * start() { * this.dispatchEvent( { type: 'start', message: 'vroom vroom!' } ); * } *}; * * // Using events with the custom object * const car = new Car(); * car.addEventListener( 'start', function ( event ) { * alert( event.message ); * } ); * * car.start(); * ``` */ class EventDispatcher { /** * Adds the given event listener to the given event type. * * @param {string} type - The type of event to listen to. * @param {Function} listener - The function that gets called when the event is fired. */ addEventListener( type, listener ) { if ( this._listeners === undefined ) this._listeners = {}; const listeners = this._listeners; if ( listeners[ type ] === undefined ) { listeners[ type ] = []; } if ( listeners[ type ].indexOf( listener ) === -1 ) { listeners[ type ].push( listener ); } } /** * Returns `true` if the given event listener has been added to the given event type. * * @param {string} type - The type of event. * @param {Function} listener - The listener to check. * @return {boolean} Whether the given event listener has been added to the given event type. */ hasEventListener( type, listener ) { const listeners = this._listeners; if ( listeners === undefined ) return false; return listeners[ type ] !== undefined && listeners[ type ].indexOf( listener ) !== -1; } /** * Removes the given event listener from the given event type. * * @param {string} type - The type of event. * @param {Function} listener - The listener to remove. */ removeEventListener( type, listener ) { const listeners = this._listeners; if ( listeners === undefined ) return; const listenerArray = listeners[ type ]; if ( listenerArray !== undefined ) { const index = listenerArray.indexOf( listener ); if ( index !== -1 ) { listenerArray.splice( index, 1 ); } } } /** * Dispatches an event object. * * @param {Object} event - The event that gets fired. */ dispatchEvent( event ) { const listeners = this._listeners; if ( listeners === undefined ) return; const listenerArray = listeners[ event.type ]; if ( listenerArray !== undefined ) { event.target = this; // Make a copy, in case listeners are removed while iterating. const array = listenerArray.slice( 0 ); for ( let i = 0, l = array.length; i < l; i ++ ) { array[ i ].call( this, event ); } event.target = null; } } } const _lut = [ '00', '01', '02', '03', '04', '05', '06', '07', '08', '09', '0a', '0b', '0c', '0d', '0e', '0f', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '1a', '1b', '1c', '1d', '1e', '1f', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '2a', '2b', '2c', '2d', '2e', '2f', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '3a', '3b', '3c', '3d', '3e', '3f', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '4a', '4b', '4c', '4d', '4e', '4f', '50', '51', '52', '53', '54', '55', '56', '57', '58', '59', '5a', '5b', '5c', '5d', '5e', '5f', '60', '61', '62', '63', '64', '65', '66', '67', '68', '69', '6a', '6b', '6c', '6d', '6e', '6f', '70', '71', '72', '73', '74', '75', '76', '77', '78',