#http://xuxzmail.blog.163.com/blog/static/2513191620082289175530/
vertices = D1:100 D2:100
u = from 0 to (PI/2) D1
v = from 0 to (PI*2) D2
x = sin(u)*cos(v)
z = sin(u)*sin(v)
y = cos(v)
r = 10
x = x*r
y = y*r
z = z*r
