Update doc

README.md

@@ -1,5 +1,7 @@
 # sitn-vr
 
+sitn-vr is a prototype of importing different kind of GIS data into a VR environment.
+
 ## File structure
 
     .
@@ -8,4 +10,22 @@
     ├── import            # Scripts and their output to import data into unity
     ├── unity             # Unity project
     ├── LICENSE
-    └── README.md
+    └── README.md
+
+## Requirements
+
+Playing the prototype:
+- Unity >= 2019.1
+- SteamVR
+
+Process the data:
+- FME >= 2019.0
+- QGIS >= 3.6
+
+## Playing the prototype
+
+1. Clone this repository
+1. Connect your VR device and make sure SteamVR is running
+1. Open the Unity Hub, click add and browse the `unity` folder at the root of this project
+1. In the Assets explorer, open the `Scenes` folder and double click on `Proto01`
+1. Hit the play button in Unity and enjoy