Three.js FlyControls. Controls yaw, pitch, and roll. Modified http://threejs.org/examples/js/controls/FlyControls.js to obey gamepad controls and control rotation only.

FlyControls.js

/**
 * @author James Baicoianu / http://www.baicoianu.com/
 * Originally from http://threejs.org/examples/js/controls/FlyControls.js
 * Simplified to only obey gamepad
 */

THREE.FlyControls = function(object) {
    this.object = object;

    // API

    this.movementSpeed = 1.0;
    this.rollSpeed = 0.005;

    // disable default target object behavior

    this.object.useQuaternion = true;

    // internals

    this.tmpQuaternion = new THREE.Quaternion();

    this.moveState = {up: 0, down: 0, left: 0, right: 0, forward: 0, back: 0, pitchUp: 0, pitchDown: 0, yawLeft: 0, yawRight: 0, rollLeft: 0, rollRight: 0};
    this.moveVector = new THREE.Vector3(0, 0, 0);
    this.rotationVector = new THREE.Vector3(0, 0, 0);

    this.handleEvent = function(event) {
        if (typeof this[event.type] == 'function') {
            this[event.type](event);
        }
    };

    this.update = function(delta) {
        this.moveState.yawLeft   = -gamepad.axes[2];
        this.moveState.pitchDown =   gamepad.axes[3];

        this.moveState.rollLeft = (Math.abs(gamepad.axes[0]) < 0.15 ? 0 : (this._watchForJoystickRoll && gamepad.axes[0])) ||
                              gamepad.buttons[15]/2;

        this.moveState.rollRight = (Math.abs(gamepad.axes[1]) < 0.15 ? 0 : (this._watchForJoystickRoll && gamepad.axes[1])) ||
                               gamepad.buttons[14]/2;

        this.updateRotationVector();

        var moveMult = delta * this.movementSpeed;
        var rotMult = delta * this.rollSpeed;

        this.object.translateX(this.moveVector.x * moveMult);
        this.object.translateY(this.moveVector.y * moveMult);
        this.object.translateZ(this.moveVector.z * moveMult);

        this.tmpQuaternion.set(this.rotationVector.x * rotMult, this.rotationVector.y * rotMult, this.rotationVector.z * rotMult, 1).normalize();
        this.object.quaternion.multiply(this.tmpQuaternion);

        // expose the rotation vector for convenience
        this.object.rotation.setEulerFromQuaternion(this.object.quaternion, this.object.eulerOrder);
    };

    this.updateRotationVector = function() {
        this.rotationVector.x = ( -this.moveState.pitchDown + this.moveState.pitchUp );
        this.rotationVector.y = ( -this.moveState.yawRight  + this.moveState.yawLeft );
        this.rotationVector.z = ( -this.moveState.rollRight + this.moveState.rollLeft );
    };

    function bind(scope, fn) {
        return function () {
            fn.apply( scope, arguments );
        };
    };

    this.updateRotationVector();
};