2014/10/15 下午 10:13:30

iphone Programming Glossary: rollingx

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

share 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.. UIAcceleration acceleration Subtract the low pass value from the current value to get a simplified high pass filter rollingX acceleration.x kFilteringFactor rollingX 1.0 kFilteringFactor rollingY acceleration.y kFilteringFactor rollingY 1.0 kFilteringFactor.. low pass value from the current 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..

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

code anyone can help me... void 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.. void 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.. 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 if deviceOrientation UIInterfaceOrientationPortrait..