Gaia Sky VR

Gaia Sky VR is the VR version of Gaia Sky. It runs on multiple headsets and operating systems thanks to Valve’s OpenVR, also implemented by OpenOVR. It is developed in the framework of ESA’s Gaia mission to chart about 1 billion stars of our Galaxy.

Running Gaia Sky VR

The Gaia Sky VR project is the Virtual Reality version of Gaia Sky. At the moment, only OpenVR is supported. Our tests have been carried out with the Oculus Rift CV1 headset in under Windows and the Valve Index on Windows and Linux. Both work reasonably well.

Currently, the regular installation of Gaia Sky also includes the VR version. On windows, you can run it using the gaiaskyvr.exe file. On Linux, just use the -vr parameter.

Pre-requisites

The minimum system requirements for running Gaia Sky VR are as following:

VR Headset OpenVR-compatible (Oculus Rift, HTC Vive)
Operating system Linux (only supported headsets) / Windows 10
CPU Intel Core i5 3rd Generation or similar. 4 core or higher recommended
GPU VR-capable GPU (GTX 970 or above)
Memory 8+ GB RAM
Hard drive 1 GB of free disk space (depending on datasets)

Software-wise, you will need the following:

  1. Follow the provided vendor instructions and install the Oculus app with the runtime. If using a SteamVR headset (HTC Vive/Pro, Valve Index, etc.), just get Steam and download SteamVR.
  2. For the Oculus Rift, you need a translation layer from OpenVR to LibOVR. You can either use SteamVR (slower) or OpenOVR (faster). We recommend using OpenOVR, as it is much simpler and faster.
    1. OpenOVR OpenComposite - Download OpenOVR’s OpenComposite Launcher, launch it and select ‘Switch to OpenComposite’. That’s it.
    2. SteamVR - Download and install Steam and then install SteamVR and launch it. The SteamVR runtime must be running alongside the Oculus Runtime for it to work.
  1. OpenJDK 11+.
  2. A VR-ready rig.

Windows

The easiest way to get it running in Windows is to install the latest version of Gaia Sky and directly run the executable gaiaskyvr.exe file. You should also have a start menu entry called ‘Gaia Sky VR’, if you chose to create it during the installation.

Linux

Download and install Gaia Sky, and then run:

$  gaiasky -vr

Getting the data

You can use the same data folder for the VR and desktop versions.

The download manager should show up automatically at startup. If it does not, force it with the -d argument (or using gradlew core:rund if running from sources). Just select the data packs and catalogs that you want to download, press Download now and wait for the process to finish.

$  gaiasky -d

You can also download the data packs manually here.

Controls

On the Oculus Rift controller the mappings are as follow:

  • Joystick (move) - move around.
  • Trigger - hold it to select an object and enter focus mode.
  • Jystick (push) - return to free mode.
  • A or X - toggle visibility of labels
  • B or Y - enable/disable on-screen information
  • A + B or X + Y - show usage info on screen
  • Grip + Joystick (move) - rotate around focus, only in focus mode

Common problems

  • If you are using an Optimus-powered laptop, make sure that the java.exe you are using to run Gaia Sky VR is set up properly in the Nvidia Control Panel to use the discrete GPU.
  • If you experience low frame rates with an Oculus headset, try using OpenOVR OpenComposite instead of SteamVR.
  • If you don’t see the VR controllers, check the output log for a line that starts with VRContext - WARN: Could not [...] and attach it or the full log file to a bug report.
  • Make sure you are using Java 11+.

More info

The project’s VR file is here.