Programming in Virtual Reality

A prototypical programming environment using Godot's Virtual Reality and the Squeak Live Programming System.

Setup

• Install the dependencies:

Metacello new
	baseline: 'GReaSe';
	onConflict: [:ex | ex allow];
	repository: 'github://hpi-swa-lab/pivr:master/squeak';
	get; load.

• Clone this repo and add it via the GitBrowser, checkout the most recent commit
• In Squeak, run in a workspace:

GRExample2D inGodot

• Open the Godot project in the project/ subfolder and run the game

Use

• After a code change: focus the Godot window and press Esc to reload
• To launch a different root component: start the listener again with the right component, then restart the Godot game

Known Issues

• print in Godot are not printed right away. You may have some success by placing a yield(get_tree(), "idle_frame") just after your print to get it to show (still not 100% reliable)
• get and set of properties from Squeak leads to a deadlock
• Component API is not final; in particular the godot nodes and ReactS component APIs are very different at the moment
• refs are updated one frame too late (trigger a re-render) and generally a bit awkward still
• putVariantOn: and readVariant is not implemented for all classes yet. Refer to the Godot source code to add those you need.

VR

• Run GRExampleVR inGodot for the test scene
• For the Quest, either:
  • change the IP address in GSRoot/GSRoot.gd to that of the computer where Squeak is running (no better ideas for this just yet)
  • map your laptop's port to the device's port if you are connected via cable: adb reverse tcp:8292 tcp:8292