How can I create a function that wraps a value between a minimum and maximum in a cyclic natutre?-CodePudding

I have a function for mapping a value to between -180 and 180:

min_ = -180
max_ = 180
range_ = (max_ - min_)

def min_max_map(value):
    return (value   max_) % range_ - range_/2

print(min_max_map(200)) # -160
print(min_max_map(200   360)) # -160 again

However when I want to shift over the minimum and maximum bounds the answer is wrong:

min_ = -180 - 360
max_ = 180 - 360
range_ = (max_ - min_)

def min_max_map(value):
    return (value   max_) % range_ - range_/2

print(min_max_map(200)) # -160 rather than -160 - 360 = -520

I can't work out how to fix my formula. How can I generalize my formula to map any minimum and maximum values?

CodePudding user response：

def min_max_map(value):
    return (value - min_) % range_   min_

CodePudding user response：

Why not just use the python built-in min and max functions? Something like:

return min( 180, max( -180, value ) )