HMD controllers
================

When exploring EON-XR Xperiences using an HMD device you can use the controllers to interact with, navigate around, and adjust the position of the object.

The buttons on the controllers are numbered from 1 to 3, Left (L1, L2, L3), and Right (R1, R2, R3). The controller design differs depending on which HMD you are using. For details about controller design, refer to :ref:`oculusbuttons` or :ref:`vivebuttons`.

For information on available features and limitations when exploring EON-XR through HMD, refer to :doc:`/HMD/features`.

.. _oculusbuttons:

Oculus Rift, Quest 1, and Quest 2
*********************************

* L1/R1 - Thumb sticks

* L2/R2 - Trigger buttons

* L3/R3 - Grip buttons

.. figure:: imgs/oculuscontroller.png
  :alt: Oculus controller, left, right, L1, L2, L3, R2, R3, R1

.. _vivebuttons:


HTC Vive series
***************

* L1/R1 - Trackpads

* L2/R2 - Trigger buttons

* L3/R3 - Grip buttons

.. figure:: imgs/vivecontroller.png
  :alt: HTC Vive controller, left, right, L1, L2, L3, R2, R3, R1


.. _controlmap:

Controller mapping
*******************

**L1**

* Walk forward, backward, or sideways

* Fly in the direction pointed to by the indicator (Up / Down)

* Press - Switch between *Fly* and *Walk* mode

**L2**

* Press - UI selection

**L3**

* Press and hold - Scale the object (+/-) by moving sideways, while scaling mode is active and pressing **R3**

**R1**

* Point to the Library menu - Scroll in the menu

* Point to the ring at object base - Rotate the object 

* Press - Traverse through the object hierarchy 

**R2**

* Press - UI selection

* Press and hold - Grabs object part, if pointed to a part

* Press and hold - Grabs base, if pointed to the ring at object base 

.. hint:: You can grab the object to move a certain part, or grab the base to move the entire object.

**R3**

* Press and hold - Scale the object (+/-) by moving sideways, while scaling mode is active and pressing **L3**

* Press and hold - Grab the slicer grid, while pointed to the slicer grid