2014/10/15 下午 10:07:42

iphone Programming Glossary: dt

Need to find Distance using Gyro+Accelerometer

http://stackoverflow.com/questions/6647314/need-to-find-distance-using-gyroaccelerometer

accelerometer signals passed through a low pass filter and binned in time with sampling interval dt you can find the displacement in x as pardon my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx.. my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1 acceleration_x i 2.0f dt dx vx dt and similarly for dy and dz. Here float acceleration_x n contains x acceleration values from.. float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1 acceleration_x i 2.0f dt dx vx dt and similarly for dy and dz. Here float acceleration_x n contains x acceleration values from start to..

Need to find Distance using Gyro+Accelerometer

http://stackoverflow.com/questions/6647314/need-to-find-distance-using-gyroaccelerometer

geometry is the Pythagorean theorem So once you have your accelerometer signals passed through a low pass filter and binned in time with sampling interval dt you can find the displacement in x as pardon my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1 acceleration_x i 2.0f dt dx vx dt and similarly.. interval dt you can find the displacement in x as pardon my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1 acceleration_x i 2.0f dt dx vx dt and similarly for dy and dz. Here float acceleration_x n contains x acceleration values from start to end of measurement at times 0 dt 2 dt 3 dt ... n.. dt you can find the displacement in x as pardon my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1 acceleration_x i 2.0f dt dx vx dt and similarly for dy and dz. Here float acceleration_x n contains x acceleration values from start to end of measurement at times 0 dt 2 dt 3 dt ... n 1 dt. To..

Send json to php using ASIFormDataRequest

http://stackoverflow.com/questions/10774201/send-json-to-php-using-asiformdatarequest

to ensure that it has been send successfully. So I wrote the following code in viewDidLoad NSString phpUrl @ http dt works.com eman bookMarks.php NSMutableArray arrayKey NSMutableArray alloc initWithObjects @ one @ two @ three nil NSMutableArray..

how to connect with sqlite in iphone?

http://stackoverflow.com/questions/2720288/how-to-connect-with-sqlite-in-iphone

SQLITE_OK NSAssert1 0 @ error prepearing statement sqlite3_errmsg db else while sqlite3_step statement SQLITE_ROW dt NSString alloc initWithUTF8String char sqlite3_column_text statement 2 dt NSString stringWithFormat @ s char sqlite3_column_text.. while sqlite3_step statement SQLITE_ROW dt NSString alloc initWithUTF8String char sqlite3_column_text statement 2 dt NSString stringWithFormat @ s char sqlite3_column_text statement 0 dt NSString stringWithUTF8String char sqlite3_column_text.. char sqlite3_column_text statement 2 dt NSString stringWithFormat @ s char sqlite3_column_text statement 0 dt NSString stringWithUTF8String char sqlite3_column_text statement 2 NSLog @ @score dt nmber addObject dt sqlite3_finalize..

Find the tangent of a point on a cubic bezier curve (on an iPhone)

http://stackoverflow.com/questions/4089443/find-the-tangent-of-a-point-on-a-cubic-bezier-curve-on-an-iphone

parametric equation that Michal uses P t 1 t ^3 P0 3t 1 t ^2 P1 3t^2 1 t P2 t^3 P3 should have a derivative of dP t dt 3 1 t ^2 P0 3 1 t ^2 P1 6t 1 t P1 3t^2 P2 6t 1 t P2 3t^2 P3 Which by the way appears to be wrong in your earlier question...

How can I create a count down timer for cocos2d?

http://stackoverflow.com/questions/446717/how-can-i-create-a-count-down-timer-for-cocos2d

Need to find Distance using Gyro+Accelerometer

http://stackoverflow.com/questions/6647314/need-to-find-distance-using-gyroaccelerometer

So once you have your accelerometer signals passed through a low pass filter and binned in time with sampling interval dt you can find the displacement in x as pardon my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1.. in x as pardon my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1 acceleration_x i 2.0f dt dx vx dt and similarly for dy and dz. Here float acceleration_x n contains x acceleration values from start to end of measurement.. x as pardon my C... float dx 0.0f float vx 0.0f for int i 1 i n i vx acceleration_x i 1 acceleration_x i 2.0f dt dx vx dt and similarly for dy and dz. Here float acceleration_x n contains x acceleration values from start to end of measurement..

NSDate from NSString gives null result

http://stackoverflow.com/questions/8396796/nsdate-from-nsstring-gives-null-result

init dateFormatter setDateFormat @ hh MM SS a dateFormatter setTimeZone NSTimeZone timeZoneForSecondsFromGMT 0 NSDate dt dateFormatter dateFromString crdInfo.swipeTime NSLog @ Date @ dt dateFormatter release How should I retrieve or store with.. NSTimeZone timeZoneForSecondsFromGMT 0 NSDate dt dateFormatter dateFromString crdInfo.swipeTime NSLog @ Date @ dt dateFormatter release How should I retrieve or store with particular format My crdInfo.swipeTime is retrieving String propertly..... setDateFormat @ dd MM yyyy hh MM SS a reDateFormatter setTimeZone NSTimeZone timeZoneForSecondsFromGMT 0 NSDate dt reDateFormatter dateFromString str NSLog @ The Date @ dt reDateFormatter setDateFormat @ hh MM SS a NSString currentTime..

scale fit mobile web content using viewport meta tag

http://stackoverflow.com/questions/8735457/scale-fit-mobile-web-content-using-viewport-meta-tag

a HTML page to fit into a web view. Constraints The HTML may or may not have fixed size elements ex img has a fixed width of 640 . In other words I don't want to force the content to be fluid and use 's. I do not know the size of the webview.. scale up to fit . After reading the android docs and the iOS docs on viewports it seems simple since I know the width of my content 640 I just set the viewport width to 640 and let the webview decide if it needs to scale the content up or.. docs and the iOS docs on viewports it seems simple since I know the width of my content 640 I just set the viewport width to 640 and let the webview decide if it needs to scale the content up or down to fit the webview. If I put the following..