Can one be simulated by periodicly syncing with GPS and in the meen while working with the accelerometer? I know for example that the N95 accelerometer is invarient to rotation on the Y axis (while beeing face up/down).
winter
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The original iPhone and the iPhone 3G use GPS to calculate the heading, however the iPhone 3GS now has a 3-dimensional magnetometer compass in it.
This can only be done taking two GPS coordinates (while moving) and determining the direction from point A to B.
于 2009-10-07T22:30:42.170 回答
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iPhone doesn't have a built in compass; but there is one created in software. It's called Compass Free, and unsurprisingly perhaps, it's free.
于 2008-09-03T22:31:36.560 回答
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Extra info: The IPHONE 1 did not have GPS or compass.
于 2008-09-04T03:45:57.693 回答