2014/10/15 下午 10:09:55

iphone Programming Glossary: gravity.z

How to detect iPhone movement in space using accelerometer?

http://stackoverflow.com/questions/2674717/how-to-detect-iphone-movement-in-space-using-accelerometer

gravity.x 1.0 kFileringFactor gravity.y currentAcceleration.y kFileringFactor gravity.y 1.0 kFileringFactor gravity.z currentAcceleration.z kFileringFactor gravity.z 1.0 kFileringFactor float gravityNorm sqrt gravity.x gravity.x gravity.y.. currentAcceleration.y kFileringFactor gravity.y 1.0 kFileringFactor gravity.z currentAcceleration.z kFileringFactor gravity.z 1.0 kFileringFactor float gravityNorm sqrt gravity.x gravity.x gravity.y gravity.y gravity.z gravity.z Removing gravity.. kFileringFactor gravity.z 1.0 kFileringFactor float gravityNorm sqrt gravity.x gravity.x gravity.y gravity.y gravity.z gravity.z Removing gravity vector from initial acceleration filteredAcceleration.x acceleration.x gravity.x gravityNorm..

Compensating compass lag with the gyroscope on iPhone 4

http://stackoverflow.com/questions/4212988/compensating-compass-lag-with-the-gyroscope-on-iphone-4

nor roll for my purposes yaw ranges from 0 to PI when the phone is pointing downwards as indicated by deviceMotion.gravity.z and swinging counterclockwise and 0 to PI when swung clockwise when the device is pointing upwards yaw ranges from PI to.. from 0 to 360 and increase when the device is swung clockwise though I am still having trouble when deviceManager.gravity.z is around 0 the yaw value freaks out at this gravity.z value . It seems to me that I could synchronize the horizontal and.. clockwise though I am still having trouble when deviceManager.gravity.z is around 0 the yaw value freaks out at this gravity.z value . It seems to me that I could synchronize the horizontal and magneticHeading values using a calculated horizontal..

iphone - core motion range of yaw, pitch and roll

http://stackoverflow.com/questions/5004548/iphone-core-motion-range-of-yaw-pitch-and-roll

device relative to the direction of gravity. To figure out if the screen is pointed down or up you can of course check gravity.z. If you're using CMDeviceMotion there is a property called gravity on it just grab gravity.z. It will be negative if the.. you can of course check gravity.z. If you're using CMDeviceMotion there is a property called gravity on it just grab gravity.z. It will be negative if the device's display is tilting upward away from gravity and positive if the display is facing down..

How to insert utf-8 mb4 character(emoji in ios5) in mysql?

http://stackoverflow.com/questions/7814293/how-to-insert-utf-8-mb4-characteremoji-in-ios5-in-mysql