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From "Filip Maj (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CB-152) Normalize Acceleration object x,y,z to return same range for all devices.
Date Mon, 23 Jul 2012 17:39:36 GMT

    [ https://issues.apache.org/jira/browse/CB-152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420810#comment-13420810
] 

Filip Maj commented on CB-152:
------------------------------

Hey Markus, not sure what the default return values are for acceleration coming from the webOS
services, but essentially we want the values returned to be the force (in meters per second
squared) acting upon the device. iOS and WP7, for example, returned values in the range of
-1 to +1, so we multiplied by -9.81 to get the proper m/s^2 values.

Hope that makes sense.
                
> Normalize Acceleration object x,y,z to return same range for all devices.
> -------------------------------------------------------------------------
>
>                 Key: CB-152
>                 URL: https://issues.apache.org/jira/browse/CB-152
>             Project: Apache Cordova
>          Issue Type: Sub-task
>          Components: webOS
>    Affects Versions: 1.5.0
>            Reporter: Bryce Curtis
>            Assignee: Markus Leutwyler
>
> Acceleration object should be consistent across platforms.  Documentation mentions range
of x,y,z to be 0-1, but Android returns ranges in -10 to +10.  This needs to be made consistent
so the same code works on all platforms. 
> Let's work towards using the DeviceMotion specification: returning values in m/s^2. At
rest, with the screen pointing upwards, values should be x=0, y=0, z=9.81
> Android and iOS are using values returned as m/s^2.

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