geomath.py 文件源码

def AngNormalize(x):
    """reduce angle to (-180,180]"""

    y = math.fmod(x, 360)
    # On Windows 32-bit with python 2.7, math.fmod(-0.0, 360) = +0.0
    # This fixes this bug.  See also Math::AngNormalize in the C++ library.
    # sincosd has a similar fix.
    y = x if x == 0 else y
    return (y + 360 if y <= -180 else
            (y if y <= 180 else y - 360))