2014/10/15 下午 10:13:30

iphone Programming Glossary: rollingy

How do you implement a Highpass filter for the IPhone accelerometer?

http://stackoverflow.com/questions/142944/how-do-you-implement-a-highpass-filter-for-the-iphone-accelerometer

improve this question From the idevkit.com forums #define kFilteringFactor 0.1 static UIAccelerationValue rollingX 0 rollingY 0 rollingZ 0 void accelerometer UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration Subtract the low.. value to get a simplified high pass filter rollingX acceleration.x kFilteringFactor rollingX 1.0 kFilteringFactor rollingY acceleration.y kFilteringFactor rollingY 1.0 kFilteringFactor rollingZ acceleration.z kFilteringFactor rollingZ 1.0 kFilteringFactor.. filter rollingX acceleration.x kFilteringFactor rollingX 1.0 kFilteringFactor rollingY acceleration.y kFilteringFactor rollingY 1.0 kFilteringFactor rollingZ acceleration.z kFilteringFactor rollingZ 1.0 kFilteringFactor float accelX acceleration.x..

How can I rotate an image in response to the iPhone's accelerometer?

http://stackoverflow.com/questions/954711/how-can-i-rotate-an-image-in-response-to-the-iphones-accelerometer

UIAccelerometer accelerometer didAccelerate UIAcceleration acceleration rollingX acceleration.x 0.1 rollingX 1.0 0.1 rollingY acceleration.y 0.1 rollingY 1.0 0.1 float xx rollingX float yy rollingY float angle atan2 yy xx self.angle M_PI 2.0 if self.angle.. didAccelerate UIAcceleration acceleration rollingX acceleration.x 0.1 rollingX 1.0 0.1 rollingY acceleration.y 0.1 rollingY 1.0 0.1 float xx rollingX float yy rollingY float angle atan2 yy xx self.angle M_PI 2.0 if self.angle 2.25 self.angle 0.25.. rollingX acceleration.x 0.1 rollingX 1.0 0.1 rollingY acceleration.y 0.1 rollingY 1.0 0.1 float xx rollingX float yy rollingY float angle atan2 yy xx self.angle M_PI 2.0 if self.angle 2.25 self.angle 0.25 if deviceOrientation UIInterfaceOrientationPortrait..