# \#optical

**URL:** https://discourse.threejs.org/tag/optical/488.md

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## [📳 Device Motion === Accelerometer !== walking physical mobile device around a room](https://discourse.threejs.org/t/device-motion-accelerometer-walking-physical-mobile-device-around-a-room/3382)

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**Author:** [@ben](https://discourse.threejs.org/u/ben)\
**Replies:** 10\
**Last updated:** [April 23, 2021, 10:52am UTC](https://discourse.threejs.org/t/device-motion-accelerometer-walking-physical-mobile-device-around-a-room/3382 "2021-04-23T10:52:13Z")

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The example provided only works on a mobile device, in my case an iphone This IS NOT about using gestures to pinch zoom or buttons to press to zoom or viewport zoom, this question is related to device orientation to mim…