add: VRChat OSC

content/docs/slimevr/_index.md

@@ -8,13 +8,13 @@ weight: 250
 - [SlimeVR Documentation](https://docs.slimevr.dev/)
 - [SlimeVR on Linux guide](https://docs.slimevr.dev/tools/linux-installation.html)
 
-> SlimeVR is a set of open hardware sensors and open source software that facilitates full-body tracking (FBT) in virtual reality. 
+> SlimeVR is a set of open hardware sensors and open source software that facilitates full-body tracking (FBT) in virtual reality.
 
 SlimeVR is an open source IMU based full body tracking system. Being open source it has Linux support and there are a few variants you can either buy or build yourself.
 
 You can pre-order the official SlimeVR trackers from [their crowdsupply page](https://www.crowdsupply.com/slimevr/slimevr-full-body-tracker), but at the time of writing this if you order them right now you'd need to wait approximately 4 months for your orders to ship, due to the very high demand driven by low cost and good quality tracking compared to other solutions.
 
-## Building
+## Assembling
 
 Alternatively you can build it on your own, and you have a few variants to choose from:
 
@@ -24,7 +24,21 @@ Alternatively you can build it on your own, and you have a few variants to choos
 
 It's generally **highly recommended** to opt for the more expensive but higher quality [BNO085](https://shop.slimevr.dev/products/slimevr-imu-module-bno085) IMU module. This should offer the highest quality tracking with best precision and minimal drifting.
 
-## Add and register the SteamVR driver
+## Installing SlimeVR Server
+
+<!-- will likely need to move this somewhere else -->
+
+- [AppImage](https://github.com/SlimeVR/SlimeVR-Server/releases/latest/download/SlimeVR-amd64.appimage)
+- [Flathub](https://flathub.org/apps/dev.slimevr.SlimeVR)
+
+## Selecting your variant
+
+There are currently two ways to use SlimeVR:
+
+- Via SteamVR driver
+- Directly via VRChat OSC (Open Sound Control)
+
+## First method: SteamVR driver
 
 Download the [SlimeVR driver for SteamVR](https://github.com/SlimeVR/SlimeVR-OpenVR-Driver/releases/latest/download/slimevr-openvr-driver-x64-linux.zip), extract it and place the `slimevr` folder in the `$HOME/.steam/steam/steamapps/common/SteamVR/drivers/` folder. This path may change depending on where your SteamVR install is located. To make sure you moved the right folder, make sure that the following path exists: `$HOME/.steam/steam/steamapps/common/SteamVR/drivers/slimevr/bin/linux64/driver_slimevr.so`.
 
@@ -36,9 +50,36 @@ Then you'll need to register the driver using the following command.
 $HOME/.steam/steam/steamapps/common/SteamVR/bin/linux64/vrpathreg.sh adddriver $HOME/.steam/steam/steamapps/common/SteamVR/drivers/slimevr
 ```
 
-## SlimeVR app
+Now the only thing you have to do is restart the SlimeVR server.
 
-<!-- will likely need to move this somewhere else -->
+## Second method: VRChat OSC
 
-- [AppImage](https://github.com/SlimeVR/SlimeVR-Server/releases/latest/download/SlimeVR-amd64.appimage)
-- [Flathub](https://flathub.org/apps/dev.slimevr.SlimeVR)
+**This method is only available in VRChat.**
+
+It requires fewer steps to configure and allows the use of the full FOSS stack without using SteamVR. For now, it is less accurate due to OSC limitations. [More information here.](https://docs.slimevr.dev/server/osc-information.html)
+
+- Step 1: Tick the checkbox in SlimeVR settings -> VRChat OSC Trackers -> Enable
+
+![Configuration steps of VRChat OSC](vrchat_osc.png "Configuring VRChat OSC")
+
+- Step 2: Start VRChat
+
+- Step 3: Go to the radial menu, and enable OSC:
+
+- Step 4: Calibrate your trackers via built-in SlimeVR configuration wizard (Mounting and body proportions)
+
+<!-- Image resourced from https://docs.slimevr.dev/server/osc-information.html -->
+
+![How to enable OSC in Radial Menu](radial_menu.png)
+
+- Step 5: Press the "Full Reset" button while standing straight
+
+![Full reset button in SlimeVR menu](full_reset.png)
+
+- Step 6: Go to VRChat settings and press "Calibrate FBT" in "Quick actions".
+
+!["Calibrate FBT" button in VRChat Quick Actions menu](quick_actions.png)
+
+- Step 7: [T-pose](https://en.wikipedia.org/wiki/T-pose) yourself and submit your calibration via pressing triggers on both sides.
+
+Done! From now on, you should be able to freely move your tracked limbs.