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| 1 | +--- |
| 2 | +title: Eballs |
| 3 | +sidebar_position: 2 |
| 4 | +--- |
| 5 | + |
| 6 | +# Eballs |
| 7 | + |
| 8 | +:::info |
| 9 | +Eballs is only able to be used with headsets that have eye tracking hardware either natively or with an addon like ETVR |
| 10 | +::: |
| 11 | + |
| 12 | +## Setting Up Eye Cameras |
| 13 | +### Camera Selection |
| 14 | + Select your left and right eye cameras from the dropdown in Baballonia |
| 15 | + |
| 16 | + |
| 17 | + |
| 18 | +### Cropping |
| 19 | + In the majority of cases you should leave your eye cameras uncropped |
| 20 | + 1) Go to cropping mode and click "Select Left/Right Frame" |
| 21 | + 2) Return to tracking mode |
| 22 | + |
| 23 | + |
| 24 | + |
| 25 | +### Special Cases |
| 26 | + #### Bigscreen Beyond 2E |
| 27 | + The 2E's eye camera stream, called Bigeye, is a single feed containing both left and right eye |
| 28 | + |
| 29 | + If Baballonia doesn't automatically seperate them use the following steps |
| 30 | + 1) In the Left Eye Camera, enter cropping mode and click "Select Left Frame" |
| 31 | + 2) In the Right Eye Camera, enter cropping mode and click "Select Right Frame" |
| 32 | + #### Single eye setups |
| 33 | + If using a single camera for eye tracking you only need to input the feed into one eye, Baballonia will handle the rest! |
| 34 | +## Eye Tracking Calibration |
| 35 | +### Getting started |
| 36 | + #### Setting up your calibration enviroment |
| 37 | + You **Must** be facing the forward direction of your playspace in SteamVR |
| 38 | + - in the steamvr home menu press the "Recenter" button |
| 39 | + |
| 40 | +  |
| 41 | + |
| 42 | + It is *highly* reccomended to do the calibration steps in a dark enviroment clear of anything that might distract you or catch your eye such as the default SteamVR enviroment |
| 43 | + #### Starting Calibration |
| 44 | + :::info |
| 45 | + Starting calibration in baballonia will launch the overlay in your VR view and begin calibration, make sure you're ready to begin beforehand |
| 46 | + ::: |
| 47 | + To begin calibrating click the "Eye Calibration" button in baballonia |
| 48 | +  |
| 49 | +### Gaze Calibration |
| 50 | +:::info |
| 51 | +For many headsets the quality and reliablility of eye tracking can be improved by slightly shifting the headset around during calibration |
| 52 | +::: |
| 53 | + During gaze calibration you should remain focused on the dot at all times |
| 54 | + There are a few reccomended movements to do while looking at the dot for optimal calibration |
| 55 | + #### 1) The Ring |
| 56 | + Move your head so the dot is rotated around the entire edge of your field of view |
| 57 | + #### 2) The Grid |
| 58 | + Move your head in a side to side motion like tracing all the lines on graph paper while keeping the dot within the bounds of the view |
| 59 | + #### 3) The Cross |
| 60 | + Move your head so the dot moves to the edges of the view in the vertical and horizontal directions |
| 61 | +### Blink Calibration |
| 62 | + During blink calibration you must keep your eyes closed until it finishes, though feel free to make expressions as this helps with robust blink detection |
| 63 | + |
| 64 | + Alternating between relaxed and tightly closed eyes also helps with correct detection |
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