hx

    public static function onMouseMove(x:Float, y:Float) {
        if (firstMouse) {
            lastX = x;
            lastY = y;
            firstMouse = false;
        }
        sensitivity = 0.1;
        xOffset = x - lastX;
        yOffset = lastY - y;
        lastX = x;
        lastY = y;
        xOffset *= sensitivity;
        yOffset *= sensitivity;
        yaw += xOffset;
        pitch += yOffset;
        if (pitch > 89.0)
            pitch = 89.0;
        if (pitch < -89.0)
            pitch = -89.0;
        var direction:Vector4 = new Vector4();
        direction.x = Math.cos(yaw * Math.PI / 180) * Math.cos(pitch * Math.PI / 180);
        direction.y = Math.sin(pitch * Math.PI / 180);
        direction.z = Math.sin(yaw * Math.PI / 180) * Math.cos(pitch * Math.PI / 180);
        direction.normalize();
        front = direction;
    }