import numpy for x in numpy.linspace(-0.99, 0.99, 20): for y in numpy.linspace(-0.99, 0.99, 20): for z in numpy.linspace(-0.99, 0.99, 20): if numpy.linalg.norm(numpy.array([x, y, z])) <= 1: print(f"v {x:g} {y:g} {z:g}")