objective c - Getting magnetic north from a xyz magnetometer (iPhone 3.0) -

-

I'm actually posting a question from the iphone development boards. I did not ask this, but when I find the answer I tried it so I got it No one was responding there so far, so I thought I would try to post it here.

Thanks for any help!

Is any magnetic CLHeading growing with the raw xyz values? I am sure there should be a general approach for this, which also works for different magnitometers.

If you do not want to use the trueHeading value and agree The compass is completely horizontal, the title can be calculated in such a way:

  • (y> 0) title = 90 - ANA2 (x, y) * 180 / p < / Li>
  • (y <0) title = 270 - ANA2 (x, y) * 180 / p
  • (y = 0
  • (y = 0 , X> 0) Title = 0.0

(from these)

... should be correct for plus title and

if If the compass is not horizontal, you (x, y, etc) B) can not ignore the launch and must use only the horizontal component (you z axis) z) vector that is parallel to the earth's surface and then calculate the projected X Title Y.

Hope this will be helpful.


Comments

Post a Comment

Popular posts from this blog

c++ - Linux and clipboard -

-
After selecting the copies of the buffer in Linux, after the text, we can click and paste the button between the mouse. I think there is a special buffer for this, I want to use it. Programming Language: C ++ Your Library: Qt Thanks. There is just one more correct answer than Paul Dixon, which answers your needs: / P > QClipboard * clipboard = QApplication :: clipboard (); CastString Selected Text = Clipboard-> Text (QClipboard :: Selection);
Read more

What is expire header and how to achive them in ASP.NET and PHP? -

-
I have examined the performance statistics of my website today. I have received a warning (or error may occur) that is given below Add Terminal Headers Here are 15 static components without a 15-futures end date * (no end) Http://www.example.com/video/css/global.css * (no time limit) http://www.example.com/video/js/global.js * (no expiration ) Http: //www.example.com/video/images/main-bg.png what it means and how to achieve it both in PHP and ASP.Net. I am on a shared hosting server, so please tell me some ways to use the code, because I can not make any modifications at the end of the server. If I expire the header, then there is no chance that if I make changes to the CSS, then the user will not be able to remove them immediately because CSS and other files have a fixed time limit (1 month, week ) Are cached for. Is Is there any harm to using PHP? $ time = time () + 3 * 24 * 60 * 60; // 3 day headings ('End:'. GMDAT ('D, D MYH: i: s \ g \ m \ t',
Read more

sql server - How can I determine which of my SQL 2005 statistics are unused? -

-
After a few years, one of my biggest databases has deposited 73 figures out of its largest tables. With Indexes, I can run many types of reports and queries, how often / heavily specific indexes are used. What is an equivalent for data? We are running SQL 2005. To make statistics automatically managed and honest, I would like to "update statistics", "create statistics" and There is no information about any management except "drop statistics" orders. In theory, UPDATE should handle the addition and removal of statistical data. In addition, I've never heard about the amount of storage or storage taking in large amounts, so I'm not sure whether there is any reason for the alarm or not. If you are seeing a potential problem, then I would suggest running an update before, if it does not clean it, it is leaving and then it appears to be safe operation (because it is the only query optimizer Is for). I will not leave "left" in the
Read more