Starting detection - ju1ce/April-Tag-VR-FullBody-Tracker GitHub Wiki

Before starting, disable SteamVR home or the camera will not show up. This button should be pressed from the virtual desktop in the SteamVR dashboard. It will start the program and open the detection window.

The out window

ApriltagOutWindow

In the window, you can see the following things:

  • In the top left corner, there is a white number. It shows the time needed to process one frame in seconds. Make sure this number is under 0.033, or detection will run slower than real time!
  • Around the markers, there are blue circles. These represent the search area: if trackers get outside of them, they will no longer be detected.
  • The detected markers are outlined in green, and their IDs are shown in blue.
  • Each tracker will have an RGB axis shown at its main marker. This represents the smoothed position and rotation as seen by SteamVR, so it will not follow the tracker exactly.

If not all trackers are found, the entire vertical area is searched every second. You will see blue squares instead of circles when that happens.

Note that, in SteamVR, while trackers are rendered above everything else, so they can always be seen, the camera is rendered behind: this means that it will not be seen if its behind the dashboard or bellow the playspace square thing on the floor.

Inside SteamVR

Inside SteamVR, you should see as many Vive trackers as you have trackers, which will move when you move. They will not be alligned correctly yet though: to allign them, follow the next step.