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Test: N/A
Change-Id: Ief8f7a0523557160e061088397b3843797351ef1
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diff --git a/media/libheadtracking/README.md b/media/libheadtracking/README.md
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@@ -157,6 +157,14 @@
module may indicate that the user is likely not in front of the screen via the
“valid” output.
+## Stillness Detector
+
+The stillness detector blocks detect when their incoming pose stream has been
+stable for a given amount of time (allowing for a configurable amount of error).
+When the head is considered still, we would trigger a recenter operation
+(“auto-recentering”) and when the screen is considered not still, the mode
+selector would use this information to force static mode.
+
### Mode Selector
The Mode Selector block aggregates the various sources of pose information into
@@ -168,7 +176,8 @@
- If the desired mode is static, the actual mode is static.
- If the desired mode is world-relative:
- - If head poses are fresh, the actual mode is world-relative.
+ - If head and screen poses are fresh and the screen is stable (stillness
+ detector output is true), the actual mode is world-relative.
- Otherwise the actual mode is static.
- If the desired mode is screen-relative:
- If head and screen poses are fresh and the ‘valid’ signal is asserted, the
