Thanks,
EDIT///
Converting the outcome to radians gives me a lat of 5.6xxxxxxxxxxxxxx .I have a feeling this bug has something to do with conversions but its not THAT simple.
The equation is correct, it just.. outputs wrong..
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343answers:
3
+1
A:
for long distance: http://www.dtcenter.org/met/users/docs/write_ups/gc_simple.pdf but for short distance You can try simple 2d math to simulate "classic" compass using: http://en.wikipedia.org/wiki/Compass#Using_a_compass. For example you can get pixel coordinates from points A and B and find angle between line connecting those points and vertical line.
also You probably should consider magnetic declination: http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp
//edit:
I was trying to give intuitive solution. However calculating screen coordinates from long/lat wouldn't be easy so You probably should use formulas provided in links.
Maciek Sawicki
2010-06-06 19:59:42
I'm not really looking to draw a compass as such, I more so want to do a check to see if the direction I am facing is the same direction the location is in. getbearing() wont work as it won't update when I'm not moving. Assume that the user is stationary.
Ulkmun
2010-06-06 20:07:43
exactly getbearing isn't useful in this case, use getOrientation() instead. rotation over z axis is azimuth. However reading device orientation is probably the easiest part of this problem.
Maciek Sawicki
2010-06-06 21:36:49
Yes, Android knows where I am, the other location and it knows my bearing but I want it to recognise when my bearing is in the same direction as the location. How would I go about doing that?
Ulkmun
2010-06-06 21:58:18
it's just math, but If You need some code there is some JS on this site: http://www.movable-type.co.uk/scripts/latlong.html or http://www.ig.utexas.edu/outreach/googleearth/latlong.html
Maciek Sawicki
2010-06-07 01:11:32
You've answered my question partly, I've updated the question to reflect the new info you've provided
Ulkmun
2010-06-07 09:02:39
A:
Maybe its because I don't know javascript, but don't you have to do something like
currlat = Math.toRadians(currlat);
to actually change the currlat value to be radians.
Jay R.
2010-06-10 15:18:10
A:
Problem was no matter what I piped in java would output in Radians, Trick was to change everything to Radians and then output came in radians, convert to degrees.
Ulkmun
2010-06-10 16:59:26