Generate random points inside a sphere

generate_points_inside_sphere.py

import sys
import random

def GeneratePointsInsideSphere(num_points) :    
        points = []

        for i in range(num_points) :            

                while True :
                        x = random.uniform(-1,1)
                        y = random.uniform(-1,1)
                        z = random.uniform(-1,1)
                        if( (x*x+y*y+z*z) <= 1.0 ) :
                                points.append([x,y,z])
                                break
                                
        return points

if len(sys.argv) > 1 :

        points = GeneratePointsInsideSphere(int(sys.argv[1]))

        print "float3 points[] = \n{"
        for i in range(len(points)) :
                print "\tfloat3(%(x).03f, %(y).03f, %(z).03f)," % {"x":points[i][0], "y":points[i][1], "z":points[i][2]}
        print "};"

else:
        print "Usage: generate_points_inside_sphere.py <num_points>"