QtSensors convert azimuth to angle

Hello,
I am trying to make a compass application using QtSensors 5.0, I am able to get azimuth value from the compass but I can't seem to find a proper formula to convert azimuth into a rotation angle for an image of a compass needle. Would anyone have any idea of what formula I need to use to get a proper rotation angle?My code below
@ property real readAz: 0
property real angle: 0
Compass { id: compass dataRate: 1 active: true onReadingChanged: { readAz = reading.azimuth angle = (readAz /(2*Math.PI)) print("Compass: ", reading.azimuth) //for debug print("Angle: ", angle) //for debug needle.update() } }@
thank you

Not sure what angle you need, but azimuth is typically measured from North going clockwise. In typical cartesian graphics, angle is measure from the xaxis (East) going counterclockwise.
So, North is an azimuth of 0, but an angle of 90 (PI/2). East is an azimuth of 90 (PI/2) but an angle of 0.
So if that's what you mean, then the angle is 90azimuth. If you want all angles to be positive, just add 360 (2*PI) to negative angles.
Glenn