Mathematical - Swift - Degrees and Radian

Question

I've been going through the documentation but could not seem to find an answer.

How do I use mathematical functions like Rad() and Deg() to convert degrees to radians also the rad to deg?

Answer 1

Defining your own functions is trivial, i.e.:

func degToRad(deg : Double) -> Double {
    return deg / 180 * M_PI
}

Or put it in an extension.

Answer 2

As an extension to @Eiko's answer, if you're using OpenGL, this answer tells us about this GLKMathDegreesToRadians function. You can see documentation for this function here.