2014/10/15 下午 10:03:29

iphone Programming Glossary: accel

http://stackoverflow.com/questions/1994018/measuring-velocity-via-iphone-sdk

don't actually care about GPS location it is battery intensive. The other obvious option to explore would be using the accelerometers to try and calculate speed but there is nothing in the API to help you do so. Based on my research it should be.. on my research it should be possible to do this but seems extremely complicated and error prone. Translating from acceleration to velocity can be tricky to begin with plus the iPhone accelerometer data can be noisy . I'm familiar with the SDK.. complicated and error prone. Translating from acceleration to velocity can be tricky to begin with plus the iPhone accelerometer data can be noisy . I'm familiar with the SDK example that demonstrates using low high pass filtering etc. but I..

Using GraphicsServices.h/GSEvent as well as compiling CLI iPhone tools with Xcode

http://stackoverflow.com/questions/3017367/using-graphicsservices-h-gsevent-as-well-as-compiling-cli-iphone-tools-with-xcod

only the SpringBoard team needs to know how to construct a complicated GSEvent. Anyway to create a HID event e.g. accelerometer event you don't need to create a GSEvent. Just use GSSendEvent not tested. GSAccelerometerInfo accel 0.0f 0.0f 1.0f.. e.g. accelerometer event you don't need to create a GSEvent. Just use GSSendEvent not tested. GSAccelerometerInfo accel 0.0f 0.0f 1.0f GSEventRecord header memset header 0 sizeof header header.type kGSEventAccelerate header.infoSize sizeof.. 0.0f 1.0f GSEventRecord header memset header 0 sizeof header header.type kGSEventAccelerate header.infoSize sizeof accel header.timestamp mach_absolute_time fill in other members. struct GSEventRecord record GSAccelerometerInfo info record header..

Cocos2d iPhone: Rotate Sprite using Accelerometer

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

iPhone Rotate Sprite using Accelerometer I'm trying to rotate a sprite using the accelerometer. when I tilt right I want him to rotate slightly to the right and when I tilt left I want him to rotate slightly.. and when I tilt left I want him to rotate slightly to the left... Thanks in advance Reed iphone cocos2d rotation accelerometer share improve this question Firs off in your h file you need to make the following variables UIAccelerationValue.. share improve this question Firs off in your h file you need to make the following variables UIAccelerationValue accelerationX UIAccelerationValue accelerationY float currentRawReading float calibrationOffset Also ensure that your h file has..

Accelerometer Low Pass Filtering

http://stackoverflow.com/questions/6942626/accelerometer-low-pass-filtering

Low Pass Filtering Still on the BigNerdRanch iOS Development book. In the Accelerometer chapter they first implement accelerometer tracking but it's fairly jumpy. They then suggest to apply a low pass filter to it by changing the original code.. tracking but it's fairly jumpy. They then suggest to apply a low pass filter to it by changing the original code void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration HypnosisView hv HypnosisView self view hv.. They then suggest to apply a low pass filter to it by changing the original code void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration HypnosisView hv HypnosisView self view hv setXShift 10.0 acceleration..