=
"Class hierarchy: :class:`freestyle.types.UnaryFunction0D` > "
":class:`freestyle.types.UnaryFunction0DDouble` > :class:`ZDiscontinuityF0D`\n"
"\n"
".. method:: __init__()\n"
"\n"
" Builds a ZDiscontinuityF0D object.\n"
"\n"
".. method:: __call__(it)\n"
"\n"
" Returns a real value giving the distance between the\n"
" :class:`freestyle.types.Interface0D` pointed by the\n"
" Interface0DIterator and the shape that lies behind (occludee). This\n"
" distance is evaluated in the camera space and normalized between 0 and\n"
" 1. Therefore, if no object is occluded by the shape to which the\n"
" Interface0D belongs to, 1 is returned.\n"
"\n"
" :arg it: An Interface0DIterator object.\n"
" :type it: :class:`freestyle.types.Interface0DIterator`\n"
" :return: The normalized distance between the pointed Interface0D\n"
" and the occludee.\n"
" :rtype: float\n"