.. _2	General Steps of Replacing the Oculus SDK:

2	General Steps of Replacing the Oculus SDK
=================================================

- Step 1：Delete the Oculus folder in the Unity project. Note that it’s strongly recommended that you back up the project first.

- Step 2：Import **PicoVRUnitySDK** in the Unity project

- Step 3：Replace the Oculus components with Pico Prefabs:

a) Replace OculusVR camera **OVRCameraRig** with the PicoVR camera **Pvr_UnitySDK** located in **PicoMobileSDK** > **Pvr_UnitySDK** > **Pvr_UnitySDK**:

.. image:: _static/2.1.png

Figure 1 - Pico Prefabs.
 
b) Transfer the existing objects and scripts from the **OVRCameraRig** to **Pvr_UnitySDK** in the project. 

**Note**: if there is a script mounted on a camera, transfer it to **Head** > **LeftEye** and/or **Head** > **RightEye**. 

c) Change **UICanvas**:

i.	Replace **EventCamara** on the **Canvas** component with **Head**.

ii.	Remove the Oculus **OVRRaycaster** script and add **Pvr_UICanvas** and **GraphicRaycaster**:

.. image:: _static/2.2.png

Figure 2 – Replacing Oculus Elements with Pico Elements.

d ) Replace the existing controller related code with PicoVR controller API and key code:

 
- Pvr_UnitySDKAPI.Controller.UPvr_GetKeyDown( Hand, Key )

Parameters: Hand refers to controller index, Key refers to specified key value.

==============    ======================
APP Key	          Pvr_KeyCode.APP
Touch Key         Pvr_KeyCode.TOUCHPADs
Trigger Key       Pvr_KeyCode.TRIGGER
==============    ======================

**Note**: Please refer to the Pico SDK API document for other settings.


- Step 4：Refer to the **Pvr_Controller_UI** interactive demo located in **Scenes**:

.. image:: _static/2.3.png

Figure 3 – Location of the interactive UI demo.