¡@
2014/10/15 ¤U¤È 10:14:13
iphone Programming Glossary: sinHow do I synthesize sounds with CoreAudio on iPhone/Mac http://stackoverflow.com/questions/1361148/how-do-i-synthesize-sounds-with-coreaudio-on-iphone-mac do I synthesize sounds with CoreAudio on iPhone Mac I'd like to play a synthesised sound in an iPhone. Instead of using a pre recorded sound and using SystemSoundID to play an existing binary I'd like to synthesise it. Partially that's because.. CoreAudio on iPhone Mac I'd like to play a synthesised sound in an iPhone. Instead of using a pre recorded sound and using SystemSoundID to play an existing binary I'd like to synthesise it. Partially that's because I want to be able to play.. is on the screen instead of a one off sound sample. If I wanted to synthesise a Middle A 1 A4 440Hz I can calculate a sine wave using sin what I don't know is how to arrange those bits into a packet which CoreAudio can then play. Most of the..
http://stackoverflow.com/questions/1501949/nsstring-to-equation to equation I am using Objective C and I am trying to set an equation that is stored in an NSString to be evaluated and stored in an NSInteger.. allows you to do variable substitutions 3x 42 evaluate with x 7 . It even has support for mathematical functions like sin cos tan their inverses dtor log .... edit a long time later... While GCMathParser is pretty awesome it has the flaw of not..
iphone sdk CGAffineTransform getting the angle of rotation of an object http://stackoverflow.com/questions/2051811/iphone-sdk-cgaffinetransform-getting-the-angle-of-rotation-of-an-object a skew operation which turns the image into a parallelogram and the rotation angle isn't defined anymore. Anyway since the rotation matrix generates cos x sin x 0 sin x cos x 0 0 0 1 You can recover the angle with return atan2 transform.b.. into a parallelogram and the rotation angle isn't defined anymore. Anyway since the rotation matrix generates cos x sin x 0 sin x cos x 0 0 0 1 You can recover the angle with return atan2 transform.b transform.a share improve this answer..
http://stackoverflow.com/questions/3841642/curve-text-on-existing-circle how I can draw the text in the white circle at certain points. EDIT Ok I am currently at this point I accomplish by using the following code UIImage createMenuRingWithFrame CGRect frame CGRect imageSize CGRectMake 0 0 300 300 float perSectionDegrees.. perSectionDegrees 360 sections count float totalRotation 90 char fontName char self.menuItemsFont.fontName cStringUsingEncoding NSASCIIStringEncoding CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate.. index CGSize textSize menuItemText sizeWithFont self.menuItemsFont char menuItemTextChar char menuItemText cStringUsingEncoding NSASCIIStringEncoding float x centerPoint.x radius cos degreesToRadians totalRotation float y centerPoint.y radius..
CLLocation Category for Calculating Bearing w/ Haversine function http://stackoverflow.com/questions/3925942/cllocation-category-for-calculating-bearing-w-haversine-function Category for Calculating Bearing w Haversine function I'm trying to write a category for CLLocation to return the bearing to another CLLocation. I believe I'm doing.. double lon2 DegreesToRadians destinationLocation.coordinate.longitude double dLon lon2 lon1 double y sin dLon cos lat2 double x cos lat1 sin lat2 sin lat1 cos lat2 cos dLon double radiansBearing atan2 y x return RadiansToDegrees.. destinationLocation.coordinate.longitude double dLon lon2 lon1 double y sin dLon cos lat2 double x cos lat1 sin lat2 sin lat1 cos lat2 cos dLon double radiansBearing atan2 y x return RadiansToDegrees radiansBearing iphone mapkit core..
http://stackoverflow.com/questions/4130821/iphone-compass-gps-direction the user is located. I have the Lat Long coordinates of this location but not sure how can I point to that location using the Compass and the GPS... just like http www.youtube.com watch v iC0Xn8hY80w this link 1 20' I write some code however.. fLng self angleToRadians alon float tLat self angleToRadians blat float tLng self angleToRadians blon float temp atan2 sin tLng fLng cos tLat cos fLat sin tLat sin fLat cos tLat cos tLng fLng double temp2 previousHeading double temp1 temp self.. tLat self angleToRadians blat float tLng self angleToRadians blon float temp atan2 sin tLng fLng cos tLat cos fLat sin tLat sin fLat cos tLat cos tLng fLng double temp2 previousHeading double temp1 temp self angleToRadians temp2 I using this..
Calculate new coordinate x meters and y degree away from one coordinate http://stackoverflow.com/questions/6633850/calculate-new-coordinate-x-meters-and-y-degree-away-from-one-coordinate new coordinate x meters and y degree away from one coordinate I must be missing somthing out in the docs I thought this should be easy... If I have one coordinate and want to get a new coordinate x meters.. fromCoord.latitude double fromLonRadians self radiansFromDegrees fromCoord.longitude double toLatRadians asin sin fromLatRadians cos distanceRadians cos fromLatRadians sin distanceRadians cos bearingRadians double toLonRadians fromLonRadians.. fromCoord.latitude double fromLonRadians self radiansFromDegrees fromCoord.longitude double toLatRadians asin sin fromLatRadians cos distanceRadians cos fromLatRadians sin distanceRadians cos bearingRadians double toLonRadians fromLonRadians..
|