Reversing G-Force Data

[Beanster]

On my video over lays, the G force data is backwards (left/right and forward/backward). What causes this and can I change it?

Thanks!

[Harry]

That happens when the device is mounted the wrong way (i.e. with the display to the front). Please check the picture in viewtopic.php?f=8&t=697 That's the expected direction of mounting (landscape or portrait). You can recalculate acceleration from GPS if you want. This will replace measured values by calculated ones. Measured is usually better. The only other alternative is exporting the lap to .hlptrl, change all the signs for acceleration values using a powerful text editor), and import the changed file again.

- Harry

[Beanster]

My iPhone is attached behind my seat on the roll bar so I have it mounted with the screen facing the front of the car. This way I can activate laptimer conveniently. So there is no way to calibrate the accelerometer or at least reverse the g force data on the overlay screen?

If not, it would be great to add the option to reverse this data on the options screen when setting up the video data overlay.

[Harry]

Just re-thought that item... That is actually not a trivial task because I'd need to check if all the calibration stuff is working at all and a simple reversing is o.k. That option is one more day that will miss somewhere else... I will add that to the feature request list but need to balance it with other requests. Thanks for your understanding.

- Harry

P.S. Question: when mounted like you do it, do you get correct lineal / longitudinal acceleration values? I.e. does the green dot in the acceleration circle go up when braking?

[Beanster]

The green dot goes up when braking.