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2014/10/15 ¤U¤È 10:12:50

iphone Programming Glossary: pow

Record the sound and play it back with changed pitch

http://stackoverflow.com/questions/10549317/record-the-sound-and-play-it-back-with-changed-pitch

NSTimer timer recorder updateMeters const double ALPHA 0.05 NOISE FILERATION ALGORITHMS double peakPowerForChannel pow 10 0.05 recorder peakPowerForChannel 0 double audioMonitorResults1 ALPHA peakPowerForChannel 1.0 ALPHA audioMonitorResults1..

Detecting a clap in IOS

http://stackoverflow.com/questions/11173605/detecting-a-clap-in-ios

attempt void levelTimerCallback NSTimer timer recorder updateMeters const double ALPHA 0.05 double peakPowerForChannel pow 10 0.05 recorder peakPowerForChannel 0 lowPassResults ALPHA peakPowerForChannel 1.0 ALPHA lowPassResults if recorder peakPowerForChannel.. needs honestly. Keep in mind however that bumps to the phone might end up being a very low frequency and fairly high powered impulse such that it will trigger you detector even though it was not an actual clap. Ditto for very high frequency..

Detecting Blow through iPhone MIC in Cocos and then Performing animation on an image

http://stackoverflow.com/questions/12985461/detecting-blow-through-iphone-mic-in-cocos-and-then-performing-animation-on-an-i

image void levelTimerCallback NSTimer timer recorder updateMeters const double ALPHA 0.05 double peakPowerForChannel pow 10 0.05 recorder peakPowerForChannel 0 lowPassResults ALPHA peakPowerForChannel 1.0 ALPHA lowPassResults NSLog @ Average.. blows void levelTimerCallback NSTimer timer recorder updateMeters const double ALPHA 0.05 double peakPowerForChannel pow 10 0.05 recorder peakPowerForChannel 0 lowPassResults ALPHA peakPowerForChannel 1.0 ALPHA lowPassResults if lowPassResults.. 0 lowPassResults ALPHA peakPowerForChannel 1.0 ALPHA lowPassResults if lowPassResults 0.055 NSLog @ Blow detected with power f lowPassResults if self.blowDetected self.blowDetected YES NSLog @ Mic blow detected self changeFrame else NSLog @ Blow..

What is the right choice between NSDecimal, NSDecimalNumber, CFNumber?

http://stackoverflow.com/questions/1704504/what-is-the-right-choice-between-nsdecimal-nsdecimalnumber-cfnumber

rate float amount int duration float capitalizedAmount @end @implementation Test float capitalizedAmount return amount pow 1.0 rate duration @end I want to access these methods and setters with their names as strings since I plan to have a lot..

how to calculate two coordinates distance in objective c?

http://stackoverflow.com/questions/1980898/how-to-calculate-two-coordinates-distance-in-objective-c

lat1 double radLat2 self rad lat2 double a radLat1 radLat2 double b self rad lng1 self rad lng2 double s 2 asin sqrt pow sin a 2 2 cos radLat1 cos radLat2 pow sin b 2 2 s s EARTH_RADIUS s round s 10000 10000 return s double rad double d return.. a radLat1 radLat2 double b self rad lng1 self rad lng2 double s 2 asin sqrt pow sin a 2 2 cos radLat1 cos radLat2 pow sin b 2 2 s s EARTH_RADIUS s round s 10000 10000 return s double rad double d return d 3.14159265 180.0 the EARTH_RADIUS..

iPhone UIImageView pinch zoom

http://stackoverflow.com/questions/2135744/iphone-uiimageview-pinch-zoom

NSLog @ point1 x 5.2f point 2 x 5.2f point 1 y 5.2f point 2 y 5.2f point1.x point2.x point1.y point2.y return sqrt pow point1.x point2.x 2 pow point1.y point2.y 2 void touchesBegan NSSet touches withEvent UIEvent event if touches count 1 NSLog.. point 2 x 5.2f point 1 y 5.2f point 2 y 5.2f point1.x point2.x point1.y point2.y return sqrt pow point1.x point2.x 2 pow point1.y point2.y 2 void touchesBegan NSSet touches withEvent UIEvent event if touches count 1 NSLog @ ^^^^^^^^^^^^^^^Tocuhes..

Extracting images from a PDF

http://stackoverflow.com/questions/2475450/extracting-images-from-a-pdf

1.0 break case kCGColorSpaceModelIndexed decodeValues malloc sizeof CGFloat 2 decodeValues 0 0.0 decodeValues 1 pow 2.0 double bitsPerComponent 1 break default break return CGFloat CFMakeCollectable decodeValues UIImage getImageRef..

Drawing app on iPad using OpenGL

http://stackoverflow.com/questions/4606680/drawing-app-on-ipad-using-opengl

vertices segments 2 CGPoint midPoint glDisable GL_TEXTURE_2D float x y float t 0.0 for int i 0 i segments 2 i x pow 1 t 2 origin.x 2.0 1 t t control.x t t destination.x y pow 1 t 2 origin.y 2.0 1 t t control.y t t destination.y vertices.. float x y float t 0.0 for int i 0 i segments 2 i x pow 1 t 2 origin.x 2.0 1 t t control.x t t destination.x y pow 1 t 2 origin.y 2.0 1 t t control.y t t destination.y vertices i CGPointMake x y t 1.0 segments windowHeight is the height..

How to create custom easing function with Core Animation?

http://stackoverflow.com/questions/5161465/how-to-create-custom-easing-function-with-core-animation

timing functions that are more complex. Problem is that media timing seems to require a cubic bezier which is not powerful enough to create these effects The code to create the above is simple enough in other frameworks which makes this very.. look something like this define a parametric function KeyframeParametricBlock function ^double double time return 1.0 pow 1.0 time 2.0 if layer CATransaction begin CATransaction setValue NSNumber numberWithFloat 2.5 forKey kCATransactionAnimationDuration..

Proper way to instantiate an NSDecimalNumber from float or double

http://stackoverflow.com/questions/5304855/proper-way-to-instantiate-an-nsdecimalnumber-from-float-or-double

the number is a primitive float or double then this should work id dn2 NSDecimalNumber decimalNumberWithMantissa dbl pow 10 17 exponent 17 isNegative dbl 0 YES NO NSLog @ dn2 doubleValue .20f description @ dn2 doubleValue dn2 But you will..

Applying Zoom Effect In cocos2D gaming environment?

http://stackoverflow.com/questions/5919180/applying-zoom-effect-in-cocos2d-gaming-environment

touchTwo view Get the distance for the current and previous touches. CGFloat currentDistance sqrt pow touchLocationOne.x touchLocationTwo.x 2.0f pow touchLocationOne.y touchLocationTwo.y 2.0f CGFloat previousDistance sqrt.. for the current and previous touches. CGFloat currentDistance sqrt pow touchLocationOne.x touchLocationTwo.x 2.0f pow touchLocationOne.y touchLocationTwo.y 2.0f CGFloat previousDistance sqrt pow previousLocationOne.x previousLocationTwo.x.. touchLocationTwo.x 2.0f pow touchLocationOne.y touchLocationTwo.y 2.0f CGFloat previousDistance sqrt pow previousLocationOne.x previousLocationTwo.x 2.0f pow previousLocationOne.y previousLocationTwo.y 2.0f Get the delta of..

Rotate a Sprite on a bezier path with touch - Cocos2D/Box2D

http://stackoverflow.com/questions/7494795/rotate-a-sprite-on-a-bezier-path-with-touch-cocos2d-box2d

.position self.position return ccpAngleSigned v1 v2 Calculates radius @return radius float calcRadius return sqrt pow self.position.x CCSprite self.target .position.x 2 pow self.position.y CCSprite self.target .position.y 2 share improve..