2014/10/15 下午 10:12:34

iphone Programming Glossary: pi

http://stackoverflow.com/questions/1031177/basic-keyframe-animation-rotation

share improve this question Think I 脎e got it. Here 䏭 code which does in this example a full 270 DEGREE rotation 1.5 pi radians including various parameters that can be customized further CALayer layer rotatingImage.layer CAKeyframeAnimation..

How to make a CATransform3dMakeRotation rotate the other way? And chain together

http://stackoverflow.com/questions/3799194/how-to-make-a-catransform3dmakerotation-rotate-the-other-way-and-chain-together

the vector for the rotation to be 2D like saying to rotate around x and y axes but that isn't equivalent to just flipping it by pi around two individual axes. Here's the nested code. CATransaction begin CATransaction setValue NSNumber numberWithFloat.. for the rotation to be 2D like saying to rotate around x and y axes but that isn't equivalent to just flipping it by pi around two individual axes. Here's the nested code. CATransaction begin CATransaction setValue NSNumber numberWithFloat.. all works with one exception. The y rotation reverses starts rotating in the opposite direction when the card gets to pi 2 and 3 pi 2. It also flips about the x axis at these points. But x and z work great. So close CGMutablePathRef thePath..

Is it possible to accessing iphone notes, calendar in IOS?

http://stackoverflow.com/questions/3941719/is-it-possible-to-accessing-iphone-notes-calendar-in-ios

access notes and calendar using native iphone app. I want to know is it possible in new iphone os Is there any public pi for that iphone ios4 share improve this question There is the Event Kit API which is documented in T he Event Kit Programming..

how can I use animation in cocos2d?

http://stackoverflow.com/questions/486609/how-can-i-use-animation-in-cocos2d

can I use animation in cocos2d I am trying to develop a Roulette game for iPhone. How can I animation spin the Roulette board iphone objective c cocoa touch animation cocos2d iphone share improve this question I have no idea.. this first set up your UIImageView by initializing it with your roulette wheel image. When you want the wheel to spin use the following code CATransform3D rotationTransform CATransform3DMakeRotation 1.0f M_PI 0 0 1.0 CABasicAnimation rotationAnimation.. you can rotate something is a half rotation before the animation wants to rotate in the other direction. That is the pi radian 180 degree rotation here goes a half circle but if you used 1.5f pi for your rotation angle it would only go a quarter..

iPhone + CGAffineTransFormRotate(pi/2) + statusBarHidden:YES + presentModalViewController = 20 pixels of white space

http://stackoverflow.com/questions/563956/iphone-cgaffinetransformrotatepi-2-statusbarhiddenyes-presentmodalviewc

CGAffineTransFormRotate pi 2 statusBarHidden YES presentModalViewController 20 pixels of white space I think the title is pretty descriptive I perform.. CGAffineTransFormRotate pi 2 statusBarHidden YES presentModalViewController 20 pixels of white space I think the title is pretty descriptive I perform all 3 of these operations on a view the result is.. of white space I think the title is pretty descriptive I perform all 3 of these operations on a view the result is 20 pixels of white space along the left side of the screen if holding the iPhone is landscapeLeft . I tried to fix it by performing..

how to calculate the current speed and average speed of user travelling from current location to particular loaction in map in iphone [closed]

http://stackoverflow.com/questions/5988590/how-to-calculate-the-current-speed-and-average-speed-of-user-travelling-from-cur

#define kRequiredAccuracy 500.0 meters #define kMaxAge 10.0 seconds #define M_PI 3.14159265358979323846264338327950288 pi @implementation SpeedViewController @synthesize timer void startReadingLocation locManager startUpdatingLocation Implement.. locManager startUpdatingLocation Implement viewDidLoad to do additional setup after loading the view typically from a nib. void viewDidLoad super viewDidLoad CLLocationManager locationManager CLLocationManager alloc init locationManager.delegate..

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

of arc curves up to PI 2 at a time. Total arc angle is less than 2PI. NSMutableArray curves NSMutableArray array float piOverTwo M_PI 2.0 float sgn startAngle endAngle 1 1 float a1 startAngle for float totalAngle fminf twoPI fabsf endAngle startAngle.. totalAngle fminf twoPI fabsf endAngle startAngle totalAngle 0.00001f FLT_EPSILON nil float a2 a1 sgn min totalAngle piOverTwo curves addObject self createSmallArc radius_ a1 a1 a2 a2 totalAngle fabsf a2 a1 a1 a2 return curves Cubic bezier.. 371 378. @note adapted for xCode by Valentine Konov valentine @konov.su 2013 @param from radians a1 to a2 where a2 a1 pi 2 @return an array with 8 floats x1 y1 x2 y2 x3 y3 x4 y4. where x1 y1 and x4 y4 are the arc's end points and x2 y2 and x3..

objective-? CALayer UIView real rotation

http://stackoverflow.com/questions/8271416/objective-calayer-uiview-real-rotation

CALayer UIView real rotation I'm trying to rotate a UIView object like shown on the image below http i.piccy.info i7 f8ff7fe488c7c492e6ff6a689bc9cdeb 1 5 2127 60800682 rotation.png I'm trying to use the CALayer's transform but.. 1 5 2127 60800682 rotation.png I'm trying to use the CALayer's transform but I get something like this http i.piccy.info i7 bbb672b058fdfdd251cc90f1ce2b9c1f 1 5 2128 9488743 rotate2.png Could someone help me with it please iphone objective..

Drawing Smooth Curves - Methods Needed

http://stackoverflow.com/questions/8702696/drawing-smooth-curves-methods-needed

Rom splines for int i 1 i granularity i float t float i 1.0f float granularity float tt t t float ttt tt t CGPoint pi intermediate point pi.x 0.5 2 p1.x p2.x p0.x t 2 p0.x 5 p1.x 4 p2.x p3.x tt 3 p1.x p0.x 3 p2.x p3.x ttt pi.y 0.5 2 p1.y.. i 1 i granularity i float t float i 1.0f float granularity float tt t t float ttt tt t CGPoint pi intermediate point pi.x 0.5 2 p1.x p2.x p0.x t 2 p0.x 5 p1.x 4 p2.x p3.x tt 3 p1.x p0.x 3 p2.x p3.x ttt pi.y 0.5 2 p1.y p2.y p0.y t 2 p0.y 5 p1.y.. t CGPoint pi intermediate point pi.x 0.5 2 p1.x p2.x p0.x t 2 p0.x 5 p1.x 4 p2.x p3.x tt 3 p1.x p0.x 3 p2.x p3.x ttt pi.y 0.5 2 p1.y p2.y p0.y t 2 p0.y 5 p1.y 4 p2.y p3.y tt 3 p1.y p0.y 3 p2.y p3.y ttt smoothedPath addLineToPoint pi Now add..

Source for a good, simple, soft modem library

http://stackoverflow.com/questions/10693590/source-for-a-good-simple-soft-modem-library

from your radio. Code #include stdio.h #include string.h #include stdlib.h #include limits.h #include math.h #ifndef M_PI #define M_PI 3.14159265358979324 #endif typedef unsigned char uchar uint8 typedef signed char schar int8 typedef unsigned.. Code #include stdio.h #include string.h #include stdlib.h #include limits.h #include math.h #ifndef M_PI #define M_PI 3.14159265358979324 #endif typedef unsigned char uchar uint8 typedef signed char schar int8 typedef unsigned short ushort.. tComplex in size_t n int direction size_t k i for k 0 k n k tComplex r 0 0 e for i 0 i n i e.x cos 2 direction M_PI n double k n 2 double i n 2 e.y sin 2 direction M_PI n double k n 2 double i n 2 e complexMul e in i r complexAdd r e out..

Compensating compass lag with the gyroscope on iPhone 4

http://stackoverflow.com/questions/4212988/compensating-compass-lag-with-the-gyroscope-on-iphone-4

deduced from the CMAttitude object's yaw property I don't need pitch nor roll for my purposes yaw ranges from 0 to PI when the phone is pointing downwards as indicated by deviceMotion.gravity.z and swinging counterclockwise and 0 to PI when.. PI when the phone is pointing downwards as indicated by deviceMotion.gravity.z and swinging counterclockwise and 0 to PI when swung clockwise when the device is pointing upwards yaw ranges from PI to 0 and PI to 0 respectively and from the compass.. and swinging counterclockwise and 0 to PI when swung clockwise when the device is pointing upwards yaw ranges from PI to 0 and PI to 0 respectively and from the compass data I'm using locationManager.heading.magneticHeading I see that the..

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

OMLog @ radius .2f startAngle .2f endAngle .2f radius_ startAngle_ endAngle_ normalize startAngle endAngle to 2PI 2PI float twoPI M_PI 2 float startAngle startAngle_ float endAngle endAngle_ float startAngle fmodf startAngle_ twoPI float.. OMLog @ radius .2f startAngle .2f endAngle .2f radius_ startAngle_ endAngle_ normalize startAngle endAngle to 2PI 2PI float twoPI M_PI 2 float startAngle startAngle_ float endAngle endAngle_ float startAngle fmodf startAngle_ twoPI float.. radius .2f startAngle .2f endAngle .2f radius_ startAngle_ endAngle_ normalize startAngle endAngle to 2PI 2PI float twoPI M_PI 2 float startAngle startAngle_ float endAngle endAngle_ float startAngle fmodf startAngle_ twoPI float endAngle fmodf..

objective-? CALayer UIView real rotation

http://stackoverflow.com/questions/8271416/objective-calayer-uiview-real-rotation

basicTrans CATransform3DIdentity basicTrans.m34 1.0 distance view.layer.transform CATransform3DRotate basicTrans M_PI_4 1.0f 0.0f 0.0f To achieve this effect you need to manipulate one of the transformation values directly m34 . The lower..