Javascript 三个js指针锁定控件旋转不'；我没有把焦点放在我的相机位置上

我使用指针锁在三个js中向相机添加了第一人称控件，下面是我创建的FPControls.js文件中的代码

/**
 * @author mrdoob / http://mrdoob.com/
 */

THREE.PointerLockControls = function ( camera ) {

        var scope = this;

        camera.rotation.set( 0, 0, 0 );

        var pitchObject = new THREE.Object3D();
        pitchObject.add( camera );

        var yawObject = new THREE.Object3D();
        yawObject.position.y = camera.position.y;
        yawObject.add( pitchObject );

        var PI_2 = Math.PI / 2;

        var onMouseMove = function ( event ) {

            if ( scope.enabled === false ) return;

            var movementX = event.movementX || event.mozMovementX || event.webkitMovementX || 0;
            var movementY = event.movementY || event.mozMovementY || event.webkitMovementY || 0;

            yawObject.rotation.y -= movementX * player.turnSpeed;
            pitchObject.rotation.x += movementY * player.turnSpeed;

            pitchObject.rotation.x = Math.max( - PI_2, Math.min( PI_2, pitchObject.rotation.x ) );

        };

        this.dispose = function() {

            document.removeEventListener( 'mousemove', onMouseMove, false );

        };

        document.addEventListener( 'mousemove', onMouseMove, false );

        this.enabled = false;

        this.getObject = function () {

            return yawObject;

        };

        this.getDirection = function() {

            // assumes the camera itself is not rotated

            var direction = new THREE.Vector3( 0, 0, 0 );
            var rotation = new THREE.Euler( 0, 0, 0, "YXZ" );

            return function( v ) {

                rotation.set( pitchObject.rotation.x, yawObject.rotation.y, 0 );

                v.copy( direction ).applyEuler( rotation );

                return v;

            };

        }();

    };


var controls;        
        var havePointerLock = 'pointerLockElement' in document || 'mozPointerLockElement' in document || 'webkitPointerLockElement' in document;
            if ( havePointerLock ) {
                var element = document.body;
                var pointerlockchange = function ( event ) {
                    if ( document.pointerLockElement === element || document.mozPointerLockElement === element || document.webkitPointerLockElement === element ) {
                        controlsEnabled = true;
                        controls.enabled = true;
                        blocker.style.display = 'none';
                    } else {
                        controls.enabled = false;
                        blocker.style.display = '-webkit-box';
                        blocker.style.display = '-moz-box';
                        blocker.style.display = 'box';
                        instructions.style.display = '';
                    }
                };
                var pointerlockerror = function ( event ) {
                    instructions.style.display = '';
                };
                // Hook pointer lock state change events
                document.addEventListener( 'pointerlockchange', pointerlockchange, false );
                document.addEventListener( 'mozpointerlockchange', pointerlockchange, false );
                document.addEventListener( 'webkitpointerlockchange', pointerlockchange, false );
                document.addEventListener( 'pointerlockerror', pointerlockerror, false );
                document.addEventListener( 'mozpointerlockerror', pointerlockerror, false );
                document.addEventListener( 'webkitpointerlockerror', pointerlockerror, false );
                instructions.addEventListener( 'click', function ( event ) {
                    instructions.style.display = 'none';
                    // Ask the browser to lock the pointer
                    element.requestPointerLock = element.requestPointerLock || element.mozRequestPointerLock || element.webkitRequestPointerLock;
                    if ( /Firefox/i.test( navigator.userAgent ) ) {
                        var fullscreenchange = function ( event ) {
                            if ( document.fullscreenElement === element || document.mozFullscreenElement === element || document.mozFullScreenElement === element ) {
                                document.removeEventListener( 'fullscreenchange', fullscreenchange );
                                document.removeEventListener( 'mozfullscreenchange', fullscreenchange );
                                element.requestPointerLock();
                            }
                        };
                        document.addEventListener( 'fullscreenchange', fullscreenchange, false );
                        document.addEventListener( 'mozfullscreenchange', fullscreenchange, false );
                        element.requestFullscreen = element.requestFullscreen || element.mozRequestFullscreen || element.mozRequestFullScreen || element.webkitRequestFullscreen;
                        element.requestFullscreen();
                    } else {
                        element.requestPointerLock();
                    }
                }, false );
            } else {
                instructions.innerHTML = 'Your browser doesn\'t seem to support Pointer Lock API';
            }

            var controlsEnabled = false;
            var moveForward = false;
            var moveBackward = false;
            var moveLeft = false;
            var moveRight = false;
            var canJump = false;
            var prevTime = performance.now();
            var velocity = new THREE.Vector3();

这是init函数中我的主文件中的代码

    controls = new THREE.PointerLockControls( camera );
    scene.add( controls.getObject() );
            var onKeyDown = function ( event ) {
                switch ( event.keyCode ) {
                    case 38: // up
                    case 87: // w
                        moveForward = true;
                        break;
                    case 37: // left
                    case 65: // a
                        moveLeft = true; break;
                    case 40: // down
                    case 83: // s
                        moveBackward = true;
                        break;
                    case 39: // right
                    case 68: // d
                        moveRight = true;
                        break;
                    case 32: // space
                        if ( canJump === true ) velocity.y += 350;
                        canJump = false;
                        break;
                }
            };
            var onKeyUp = function ( event ) {
                switch( event.keyCode ) {
                    case 38: // up
                    case 87: // w
                        moveForward = false;
                        break;
                    case 37: // left
                    case 65: // a
                        moveLeft = false;
                        break;
                    case 40: // down
                    case 83: // s
                        moveBackward = false;
                        break;
                    case 39: // right
                    case 68: // d
                        moveRight = false;
                        break;
                }
            };
            document.addEventListener( 'keydown', onKeyDown, false );
            document.addEventListener( 'keyup', onKeyUp, false );

这一切都很好，除了相机的旋转似乎没有集中在我的实际位置，而且看起来不对劲。我有什么地方做错了，有人能帮我吗