Between -180 and 180 degrees (convert a larger angle)

[Philosophaie]

I need a formula to put an angle between -180 and 180 and recycle if not in the range.

I can do it between 0 and 360:

angle = deg - 360 * floor(deg / 360)

just not between -180 and 180

Oh and what is the name of this function?

 

[axmls]

Take what you have and subtract 180.

Unless I'm not understanding what you're asking.

 

[mathman]

I need a formula to put an angle between -180 and 180 and recycle if not in the range.

I can do it between 0 and 360:

angle = deg - 360 * floor(deg / 360)

just not between -180 and 180

Oh and what is the name of this function?

Function is modulo (mod). What you are asking for is mod 360.

 

[WWGD]

EDIT Just add $\pi$ to your formula and you will hit an angle in that interval. The interval [-180,180] is the translation of [0,360] by $- \pi$