2014/10/15 下午 10:13:07

iphone Programming Glossary: radianstodegrees

Cocos2d iPhone: Rotate Sprite using Accelerometer

http://stackoverflow.com/questions/3826304/cocos2d-iphone-rotate-sprite-using-accelerometer

at the top put #define kFilteringFactor 0.05 CGFloat DegreesToRadians CGFloat degrees return degrees M_PI 180 CGFloat RadiansToDegrees CGFloat radians return radians 180 M_PI Then in your .m file on your viewDidLoad Function put UIAccelerometer accel UIAccelerometer.. keep the raw reading to use during calibrations currentRawReading atan2 accelerationY accelerationX float rotation RadiansToDegrees currentRawReading targetView.transform CGAffineTransformMakeRotation DegreesToRadians rotation targetView.transform CGAffineTransformRotate..

CLLocation Category for Calculating Bearing w/ Haversine function

http://stackoverflow.com/questions/3925942/cllocation-category-for-calculating-bearing-w-haversine-function

Bearing.m #import CLLocation Bearing.h double DegreesToRadians double degrees return degrees M_PI 180 double RadiansToDegrees double radians return radians 180 M_PI @implementation CLLocation Bearing double bearingToLocation CLLocation destinationLocation.. y sin dLon cos lat2 double x cos lat1 sin lat2 sin lat1 cos lat2 cos dLon double radiansBearing atan2 y x return RadiansToDegrees radiansBearing iphone mapkit core location cllocation haversine share improve this question Your code seems fine to.. your radian degrees converters to this double DegreesToRadians double degrees return degrees M_PI 180.0 double RadiansToDegrees double radians return radians 180.0 M_PI If you are getting negative bearings add 2 M_PI to the final result in radiansBearing..

How to rotate a Direction Arrow to particular location

http://stackoverflow.com/questions/7173925/how-to-rotate-a-direction-arrow-to-particular-location

Rotate Bearing View self rotateBearingView bearingView radians radians For Rotate Niddle CGFloat angle RadiansToDegrees radians self setLatLonForDistanceAndAngle self rotateArrowView arrowView degrees angle fltAngle void rotateArrowView UIView..

Using quaternion instead of roll, pitch and yaw to track device motion

http://stackoverflow.com/questions/19239482/using-quaternion-instead-of-roll-pitch-and-yaw-to-track-device-motion

finding the roll pitch and yaw values as CMQuaternion quat self.motionManager.deviceMotion.attitude.quaternion myRoll radiansToDegrees atan2 2 quat.y quat.w quat.x quat.z 1 2 quat.y quat.y 2 quat.z quat.z myPitch radiansToDegrees atan2 2 quat.x quat.w quat.y.. myRoll radiansToDegrees atan2 2 quat.y quat.w quat.x quat.z 1 2 quat.y quat.y 2 quat.z quat.z myPitch radiansToDegrees atan2 2 quat.x quat.w quat.y quat.z 1 2 quat.x quat.x 2 quat.z quat.z myYaw radiansToDegrees 2 quat.x quat.y quat.w quat.z.. 2 quat.z quat.z myPitch radiansToDegrees atan2 2 quat.x quat.w quat.y quat.z 1 2 quat.x quat.x 2 quat.z quat.z myYaw radiansToDegrees 2 quat.x quat.y quat.w quat.z When i noticed there is some disparity in the yaw values i searched and could find from here..