2014/10/15 下午 10:08:30

iphone Programming Glossary: euler

http://stackoverflow.com/questions/13613239/drifting-yaw-angle-after-moving-fast

of the time 1簞 . I used the old and sadly no longer available Core Motion Teapot sample to validate the effect. The Euler Angles for logging are read directly from CMAttitude NSLog @ pitch f roll f yaw f attitude.pitch 180 M_PI attitude.roll..

iphone - core motion (relative rotation)

http://stackoverflow.com/questions/5053793/iphone-core-motion-relative-rotation

some handy built in functionality to convert a CMAttitude to a form that is actually useful for something like Euler Angles a rotation matrix or a quaternion. You sound like you're looking for the Euler Angle representation Pitch Yaw Roll..

iPhone - understanding iPhone rotation

http://stackoverflow.com/questions/5170010/iphone-understanding-iphone-rotation

inverse of q1 q1^ 1 and then you get dQ q1^ 1 q2 If deviceMotionInterval is high enough you always have handy small Euler angles without any 90簞 singularities or other beasty stuff. The possible drawback of this solution might be a slight drift..

Store orientation to an array - and compare

http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare

relative to North matter I guess not. It is far easier to compare the acceleration vectors than orientations Euler angles rotation matrices quaternions as tc pointed that out. If you are using acceleration data you have 3 dimensional vectors..

Finding the closest point to a given point

http://stackoverflow.com/questions/913576/finding-the-closest-point-to-a-given-point

the last location you checked if there's a lot of coherency generally there is . I would probably build an octree in Euler geocentric XYZ space because that allows me to get true distance not warped lat lon distance. However in practice a quad..