u_to_zPoint.py

from pygeo import *

v=display(scale=5, camera_vector=(0,1,-1))

upoint=uSlider(theta=PI/4,phi=PI/1.7,color=BLUE,pointsize=.1)


zpoint=u_to_zPoint(upoint,color=RED,pointsize=.15)

#reference objects

usphere=uSphere()
rLine(usphere.N,upoint,color=WHITE)
zPlane(color=MAGENTA)
v.pickloop()