def cross(a, b):
    x = a[1] * b[2] - a[2] * b[1]
    y = a[2] * b[0] - a[0] * b[2]
    z = a[0] * b[1] - a[1] * b[0]
    return (x, y, z)
Cross product of vectors a and b.
dataset/ETHPy150Open tudelft3d/CityGML2OBJs/polygon3dmodule.py/cross