How to reset Accellerometer base orientation

[mobichan]

I am looking for a way to reset the accellerometer's 0,0,0 orientation. Normally, it happens when the frame starts. But if the player was holding the device at an awkward angle when the accelerometer initializes, then I need a way for them to re-initialize it. I want to have a button in my pause menu that simply resets 0,0,0 of the accellerometer to the current device orientation.

Can anyone suggest how I would accomplish this?

Thanks,

Mobichan

[Diego]

At the beggining of the frame you should save the actual accelerometer numer of each angle on respective variable. Let's say for instance calibx, caliby and calibz
Then when you use it to move an object or whatever, you should subtract this value from the calculation

Example:

ball.y = ball.y + accelerometer.y - caliby

I think that should do in some cases, i just dont know if you need to use ABS() at some point.

[DistantJ]

The problem here is that once your phone tilts past a certain point the numbers start counting in the opposite direction. In Hungry Beetle I gave the users a calibration screen where they had to tilt their phone to find the 'sweet spot' before starting the game, Super Monkey Ball style.

[mobichan]

Yeah, my game only needs tilting left and right, so I simply compare the current tilt value in x to be greater than 0.02 or less than -0.02. The problem comes if the user was holding the phone sideways when the frame starts, then the orientation of the accelerometer will be sending values that are not comfortable to the user. I need the user to be able to reorient the device mid-game and force the accelerometer to re-initialize its values. And I would like to do this without restarting the frame.

[DistantJ]

Weird, in my Hungry Beetle game it doesn't re-calibrate at the start of the frame...

Might be something CT could do in an update, depending on how the accelerometer works.

[mobichan]

From the help file, I got the impression that MMF intitalized the accelerometer on Start of Frame. Might be a misinterpretation on my part. Does anyone else know how MMF handles this?