How to convert points to radians in Objective-C?

Question

In my app I\'m using UIBezierPath to draw an arc into a circle. I\'m trying to correlate a number to radians. So let\'s say a user has a certain number of points, and the po

Answer 1

Objective-C

CGFloat fullCircle = 2 * M_PI ;             // M_PI Pi number which is half of the circle in radian
CGFloat startPoint = 0.0      ;
CGFloat endPoint   = fullCircle * 0.33 ;

// Assuming circling clockwise

// .... Draw first step UIBezierPath

startPoint = endPoint        ;
endPoint = startPoint + fullCircle * 0.33 ;
// .... Draw second step UIBezierPath

startPoint = endPoint        ;
endPoint = fullCircle - startPoint ;       // This to make sure the whole circle will be covered
// .... Draw the last step UIBezierPath

Swift

let fullCircle = 2 * M_PI             // M_PI Pi number which is half of the circle in radian
var startPoint: Float = 0.0
var endPoint: Float = fullCircle * 0.33

// Assuming circling clockwise
// .... Draw first step UIBezierPath

startPoint = endPoint
endPoint = startPoint + fullCircle * 0.33
// .... Draw second step UIBezierPath

startPoint = endPoint
endPoint = fullCircle - startPoint       // This to make sure the whole circle will be covered
// .... Draw the last step UIBezierPath