maemo.org - Talk - [Maemo 5] n900Fly - An irresponsible app for the n900

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- - [Maemo 5] n900Fly - An irresponsible app for the n900 (https://talk.maemo.org/showthread.php?t=36312)

Re: n900Fly - An irresponsible app for the n900

The acceleration is constant. The velocity changes. At the top of an arc, the velocity is zero, but it begins to fall due to the constant acceleration. 9.81 meters per second towards Earth. Basic physics, here.

Sorry, just being really anal about technicalities here.

Re: n900Fly - An irresponsible app for the n900

Quote:

Originally Posted by Bytales (Post 429717)

Well, at the top of the flight, the acceleration is zero. If there is a way you can detect this with the accelerometer on the phone, that would be the moment to take the picture. I don't know how the accelerometers work on the n900, but that's the main idea.

I need a facepalm on the double...

http://img189.imageshack.us/img189/2...cepalmk.th.jpg

because your idea was already addressed at least twice in this thread:

Quote:

Originally Posted by cpscotti (Post 429156)

Well.. you should all try accDisplay since physics are not helping. The reason why the phone's accel. readings are all zero (and not 1g) is because all the phone parts (including the accelerometer's internals) are (de)accelerating equally. Accelerometers measure acceleration differences relating to "free-fall".
Wikipedia might help

For example, the ISS "feels like" zero G (and indeed a accelerometer there will read 0) only because it's indefinitely falling towards earth: orbiting.

...

Re: n900Fly - An irresponsible app for the n900

Quote:

Originally Posted by gamof (Post 429763)

If the velocity changes the acceleration cannot be constant. Thats the very definition of acceleration, acceleration means how the speed changes in time.
Youre right, at the top of thearc velocity is zero, but the phone has accelerometers, not velocimeters. So at the top of the ark, i think the accelerators in the phone detect 0 acceleration. I don't know exactly how they are build and what exactly are detecting but i think my reasoning is correct.

Re: n900Fly - An irresponsible app for the n900

Quote:

Originally Posted by Bytales (Post 430363)

There is wrong and there is VERY WRONG;
Your reasoning is VERY WRONG.
Dou you have a n900? can you please use the accdisplay app? (on extras-testing now).

Quote:

Originally Posted by bonerp (Post 429464)

sorry am I the only one who thinks its not really appropriate for this type of language on an app???

Yes, I agree with you. That's why since version 0.9 the "Hello ****ers" is out.

Quote:

Originally Posted by mikec (Post 429425)

With all this accelerometer action there seems to be a missing feature PORTRAIT MODE

Really, a PORTRAIT MODE on this app won't help much since it will be switching portrait-landscape-portrait-landscape during "take-off" and specially during landing and thus eating lots of CPU and then probably messing up with the time readings (start & end).

App is in going to extras-testing this afternoon.. please give it some thumbs up!

Re: n900Fly - An irresponsible app for the n900

Please show your record )) . My record is about 4m but I dont want to try more

Re: n900Fly - An irresponsible app for the n900

Quote:

Originally Posted by soleil (Post 430564)

Please show your record )) . My record is about 4m but I dont want to try more

Man! My record is about 1.9 (indoors) and that's totally enough for me!
I could do waaaay better with my 3410 but those were other times.

Re: n900Fly - An irresponsible app for the n900

Hey everyone.. app on extras-testing now... please test and vote..:
http://maemo.org/packages/package_instance/view/fremantle_extras-testing_free_armel/n900fly/0.1.4

Also.. check accDisplay:.. also on testing.. =] vote!

Thanks anyway..

Re: n900Fly - An irresponsible app for the n900

Quote:

Originally Posted by ewan (Post 417055)

i wonder if you can get it to take a photo at the top of the throw....

feature want! :d

Re: n900Fly - An irresponsible app for the n900

That's the surprise for V. 2...

Re: n900Fly - An irresponsible app for the n900

It seems that I cannot reply in the downloads website: http://maemo.org/downloads/product/Maemo5/n900fly , so I will comment here about problems with n900fly.

I installed the program, started it and threw my n900 in the air couple of times (1-2 meters). Nothing happened. All numbers still 0.0 after the throw. Rebooted N900 and tested again. Still nothing. Installed AccDisplay to make sure that accelerometer works. Accelerometer seems to work.