u_to_zCircle.py

from pygeo import *

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

up1=uSlider(theta=PI/3,phi=PI*2/5,color=WHITE)
up2=uSlider(theta=-PI/2,phi=PI,color=WHITE)
up3=uSlider(theta=-PI/5,phi=-PI*4/5,color=WHITE)
ucircle=uCircle(up1,up2,up3,color=BLUE)
u_to_zCircle(ucircle,color=RED,linewidth=.08)

#reference objects
usphere=uSphere()
zp1=zPoint(up1,color=WHITE)
zp2=zPoint(up2,color=WHITE)
zp3=zPoint(up3,color=WHITE)

rLine(usphere.N,up1,color=WHITE)
rLine(usphere.N,up2,color=WHITE)
rLine(usphere.N,up3,color=WHITE)

zPlane(color=LIGHTGRAY)

v.pickloop()