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Cyberneticmelon
2025-03-27 21:11:24 -04:00
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# Stardust XR Reference Server
# Stardust XR Server
This project is a usable Linux display server that reinvents human-computer interaction for all kinds of XR, from putting 2D/XR apps into various 3D shells for varying uses to SDF-based interaction.
Stardust XR is a display server for VR and AR headsets on Linux-based systems. [Stardust provides a 3D environment](https://www.youtube.com/watch?v=v2WblwbaLaA), where anything from 2D windows (including your existing apps!), to 3D apps built from objects, can exist together in physical space.
## Prerequisites
1. Cargo
2. CMake
3. EGL+GLES 3.2
4. GLX+Xlib
5. fontconfig
6. dlopen
7. OpenXR Loader (required even if run in flatscreen mode)
![workflow](/img/workflow.png)
## Build
## Core Dependencies
| **Dependency** | **Ubuntu/Debian** | **Arch Linux** | **Fedora** |
|-----------------------------|-------------------------------------------------------------------------------------------------|---------------------------------------------------|-------------------------------------------------------------|
| **Cargo** | `cargo` | `cargo` | `cargo` |
| **CMake** | `cmake` | `cmake` | `cmake` |
| **EGL+GLES 3.2** | `libegl1-mesa-dev`, `libgles2-mesa-dev` | `mesa` *(provides EGL/GLES libraries and headers)* | `mesa-libEGL-devel`, `mesa-libGLES-devel` |
| **GLX+Xlib** | `libx11-dev`, `libxfixes-dev`, `libxcb1-dev`, `libgl1-mesa-dev`, `libxkbcommon-dev` | `libx11`, `libxfixes`, `libxcb` *(and GLX via mesa)*| `libX11-devel`, `libXfixes-devel`, `libxcb-devel`, `mesa-libGL-devel` *(or equivalent)* |
| **fontconfig** | `libfontconfig1-dev` | `fontconfig` | `fontconfig-devel` |
| **dlopen** (glibc function) | Provided by `libc6-dev` (part of the core C library) | Provided by `glibc` *(included in base-devel)* | Provided by `glibc-devel` |
| **OpenXR Loader** | `libopenxr-loader1`, `libopenxr-dev`, `libopenxr1-monado` | `openxr` | `openxr-devel` |
Command line installation of core & dynamic dependencies are provided below:
<details>
<summary>Ubuntu/Debian</summary>
<pre><code class="language-bash">
sudo apt-get update && sudo apt-get install -y \
build-essential \
cargo \
cmake \
libegl1-mesa-dev libgles2-mesa-dev \
libx11-dev libxfixes-dev libxcb1-dev libxau-dev libgl1-mesa-dev libxkbcommon-dev \
libfontconfig1-dev libfreetype6-dev libharfbuzz-dev libgraphite2-dev \
libc6-dev \
libopenxr-loader1 libopenxr-dev libopenxr1-monado libwayland-dev \
libjsoncpp-dev libdrm-dev libexpat1-dev libxcb-randr0-dev \
libxml2-dev libffi-dev libbz2-dev libpng-dev libbrotli-dev liblzma-dev libglib2.0-dev libpcre2-dev
</code></pre>
</details>
<details>
<summary>Arch Linux</summary>
<pre><code class="language-bash">
sudo pacman -Syu --needed \
base-devel \
rust \
cmake \
mesa \
libx11 \
libxfixes \
libxcb \
libxkbcommon \
fontconfig \
freetype2 \
openxr \
jsoncpp \
libffi \
wayland \
expat \
libxml2 \
libxau \
bzip2 \
xz \
libpng \
brotli \
pcre2 \
glib2 \
libdrm
</code></pre>
</details>
<details>
<summary>Fedora</summary>
<pre><code class="language-bash">
sudo dnf group install development-tools && \
sudo dnf install -y \
cargo \
cmake \
mesa-libEGL-devel \
mesa-libGLES-devel \
libX11-devel \
libXfixes-devel \
libxcb-devel \
libxkbcommon-devel \
fontconfig-devel \
freetype-devel \
harfbuzz-devel \
graphite2-devel \
openxr-devel \
wayland-devel \
jsoncpp-devel \
libdrm-devel \
expat-devel \
xcb-util-devel \
libxml2-devel \
libXau-devel \
bzip2-devel \
xz-devel \
libpng-devel \
brotli-devel \
pcre2-devel \
glib2-devel
</code></pre>
</details>
## Installation
More detailed instructions and walkthroughs are provided at https://www.stardustxr.org
The [Terra Repository](https://terra.fyralabs.com/) is required, and comes pre-installed with [Ultramarine Linux](https://ultramarine-linux.org/). Other Fedora Editions and derivatives can directly install terra-release:
```bash
sudo dnf install --nogpgcheck --repofrompath 'terra,https://repos.fyralabs.com/terra$releasever' terra-release
```
For a full installation of the Stardust XR server *and* a selected group of clients, run:
```bash
sudo dnf group install stardust-xr
```
## Manual Build
We've provided a manual installation script [here](https://github.com/cyberneticmelon/usefulscripts/blob/main/stardustxr_setup.sh) that clones and builds the Stardust XR server along with a number of other clients from their respective repositories, and provides a startup script for automatically launching some clients.
After cloning the repository
```bash
cargo build
```
The latest stable server is automatically built to an appimage at https://github.com/StardustXR/server/releases for easy testing.
## Usage
> [!NOTE]
> For help with setting up an XR headset on linux, visit https://stardustxr.org/docs/get-started/setup-openxr
First, try running `cargo run` in a terminal window. If a headset is plugged in and OpenXR is working no window will show up. However, the headset should show the same things as the window that opens:
![A pitch black void with a single bleach white hand in the middle](/img/xr_mode_windowed_blank.png)
The **Stardust XR Server** is a server that runs clients, so without any running, you will see a black screen. If you only have the server installed, we recommend also cloning and building the following clients to start: [Flatland](https://github.com/StardustXR/flatland), which allows normal 2D apps to run in Stardust, [Protostar](https://github.com/StardustXR/protostar), which contains Hexagon Launcher, an app launcher menu, and [Black Hole](https://github.com/StardustXR/black-hole) to quickly tuck away your objects and apps (kind of like desktop peek on Windows).
Stardust won't do anything interesting without clients! Try some from https://github.com/StardustXR.
First, try running `cargo run -- -f` in a terminal window to check out flatscreen mode, (or `stardust-xr-server -f` / `stardust-xr-server_dev -f` if you installed via dnf or the manual installation script, respectively, as they provide symlinks.)
### Default Sky
If there aren't already any clients running, you'll need to manually launch them by either navigating to their repositories and running `cargo run`, or running them via their names if you installed via dnf or the manual installation script, such as `flatland`, `hexagon_launcher`, etc.
You can set a default skytex/skylight by putting your favorite HDRI equirectangular sky in `~/.config/stardust/skytex.hdr`. Certain clients can override this.
> [!IMPORTANT]
> [Flatland](https://github.com/StardustXR/flatland) must be running for 2D apps to launch.
Flatscreen mode when the default skybox is [Zhengyang Gate](https://polyhaven.com/a/zhengyang_gate):
![A pitch black window representing Stardust in flatscreen mode](/img/flatscreen_3.png)
### Startup Script
A startup script can be created at `~/.config/stardust/startup` that will launch specified settings and clients/applications, an example of which is shown [here](https://github.com/cyberneticmelon/usefulscripts/blob/main/startup). If you used the [installation script](https://github.com/cyberneticmelon/usefulscripts/blob/main/stardustxr_setup.sh), one will have already been made for you. This allows wide flexibility of what clients to launch upon startup (and, for example, *where*, using the [Gravity](https://github.com/StardustXR/gravity) client to specify X Y and Z co-ordinates).
### Windowed Mode
### Flatscreen Navigation
A video guide showcasing flatscreen controls is available [here](https://www.youtube.com/watch?v=JCYecSlKlDI)
If the stardust server can't connect to an OpenXR runtime or you force it into flatscreen mode with `-f`, the server will show in a window.
![A black void representing Stardust in XR mode with a hand skeleton in the middle](/img/flatscreen_2.png)
To move around, hold down `Shift + W A S D`, with `Q` for moving down and `E` for moving up.
![wasd](https://github.com/StardustXR/website/blob/main/static/img/updated_flat_wasd.GIF)
You can navigate around by right click + dragging to look around, Shift+W/A/S/D/Q/E to move. If you have a virtual hand, left click pinches, right click points, both make a fist.
To look around, hold down `Shift + Right` Click while moving the mouse.
![updated_look](https://github.com/StardustXR/website/blob/main/static/img/updated_flat_look.GIF)
### Flags
#### Flatscreen (-f)
To drag applications out of the app launcher, hold down `Shift + ~`
![updated_drag](https://github.com/StardustXR/website/blob/main/static/img/updated_flat_drag.GIF)
The server will show up in windowed mode no matter what with your mouse pointer being turned into a 3D pointer. Keyboard input will be sent to whatever your mouse is hovering over like visionOS simulator.
Flatscreen mode upon initial startup:
![A pitch black window representing Stardust in flatscreen mode](/img/flatscreen_1.png)
### XR Navigation
A video guide showcasing XR controls is available [here](https://www.youtube.com/watch?v=RbxFq6JjliA)
#### Overlay (-o \<PRIORITY>)
**Quest 3 Hand tracking**:
Pinch to drag and drop, grasp with full hand for grabbing, point and click with pointer finger to click or pinch from a distance
The server will, if in XR mode, be overlaid using the OpenXR overlay extension with the given priority.
![hand_pinching](https://github.com/StardustXR/website/blob/main/static/img/hand_pinching.GIF)
#### Disable controller (--disable-controller)
**Quest 3 Controller**:
Grab with the grip buttons, click by touching the tip of the cones or by using the trigger from a distance
Some runtimes such as Monado may emulate a controller using a hand, and this messes with Stardust's input system. Set this flag to ignore the controllers that the OpenXR runtime provides.
#### Execute (-e </path/to/executable>)
When wayland and OpenXR and such are initialized, run the given executable (such as a bash script) with all the environment variables needed to connect all clients of any type to the server. If not set, the server will run the executable at `~/.config/stardust/startup` if it exists. This is how stardust desktop environments can be made.
#### Help (-h, --help)
help
## Test
##### Gnome Graphical Integration Test
- `nix build .#gnome-graphical-test`
This test uses Nix to reproducibly execute a QEMU virtual machine which
spawns a full Gnome desktop. It runs `monado-service`, `stardust-xr-server`
`flatland` underneath of Gnome and then attaches `weston-cliptest` to the
`flatland` process running underneath of `stardust-xr-server`, the result is
a screenshot in PNG format that should look like expected. If any process in
this test produces an exit code above 0, the test will fail, graphical bugs
should be visible in the screenshot. An example of the result is below.
###### Result
![image](https://github.com/StardustXR/server/assets/26458780/e21cd039-2528-4568-b20a-ce4abfab6d9b)
##### Everything
`nix flake check` will build every test underneath of the `checks` attribute in the `flake.nix`
![controller_click](https://github.com/StardustXR/website/blob/main/static/img/controller_click.GIF)

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@@ -123,7 +123,7 @@ impl MousePointer {
select: Input::key(Key::MouseLeft).is_active() as u32 as f32,
middle: Input::key(Key::MouseCenter).is_active() as u32 as f32,
context: Input::key(Key::MouseRight).is_active() as u32 as f32,
grab: Input::key(Key::MouseBack).is_active() as u32 as f32,
grab: (Input::key(Key::Backtick).is_active() && Input::key(Key::Shift).is_active()) as u32 as f32, // Was Mouse 5
scroll_continuous: [0.0, mouse.scroll_change / 120.0].into(),
scroll_discrete: [0.0, mouse.scroll_change / 120.0].into(),
raw_input_events: vec![],