Remote visualization using VirtualGL

Short guide

Run FortiVPN

From terminal give command:

 /opt/VirtualGL/bin/vglconnect -s Uni-ID@viz.hpc.taltech.ee

Run program needed by command:
```
 vglrun paraview
```
or load program needed if program is not native.

VirtualGL long version

VirtualGL is an open-source software package that redirects the 3D rendering commands from user computer to remote server and sends the rendered output back to user’s computer. Vis-node has 2.5.2 version of VGL, but any recent VGL client version should work.

Software recommended to use

The client (your desktop) computer needs X11 (for Linux), Cygwin (for Windows), or XQuarts (for Mac) in addition to the VirtualGL software, to provide the abstract interface to managing a GUI:

Linux:
- X11 is default, if you have a graphical desktop, you have X11
- download your VirtualGl package from https://www.virtualgl.org/
Windows:
- Cygwin https://www.cygwin.com/
- use the Cygwin installer to install Cygwin/x and VirtualGL
Mac:
- XQuarts needs to be installed https://www.xquartz.org/
- download your VirtualGl package from https://www.virtualgl.org/

Run VirtualGL

Open and run FortiVPN
From terminal give command:
```
 /opt/VirtualGL/bin/vglconnect -s Uni-ID@viz.hpc.taltech.ee
```
NB! It is needed to specify path of VirtualGL.

By default on
- Linux it is vgl/opt/VirtualGL/bin/
- Mac it is /opt/VirtualGL/bin/vglconnect.
Will be done access to viz:
After the connection is established, run the desired program (if it is native) with the command:
```
 vglrun paraview
```
If command is not native, then firstly corresponding environment should be loaded:
```
 module load viz-spack
 module load jmol
```
If XQuartz is install will appear paraview window:

If there is no native package for your Linux distribution, you can download the .deb and unpack it using dpkg -x virtualgl...deb vgl.