Re: [Visualpython-users] Clear points

[Poul R. <Pou...@sk...>]

Could someone please correct (or comment on) the following (rather
minimal) example. It runs without any error messages but there are some
unwanted lines and trying to clear a graph by putting visble=0 doesn't
work.

Yours
Poul Riis



from visual.graph import *
from math import *
from time import *

graph = gdisplay(title='Test',width=400,
height=300,foreground=color.black, background=color.white)
graphcurve= gcurve(color=color.red)

for i in range (0,360):
    graphcurve.plot(pos=(i,sin(i/180.0*pi)))
    sleep(0.005)

#painting the curve white, thus clearing it:    
graphcurve.color=color.white
for i in range (0,360):
    graphcurve.plot(pos=(i,sin(i/180.0*pi)))
    sleep(0.005)

#another curve in blue:    
graphcurve.color=color.blue
for i in range (0,360):
    graphcurve.plot(pos=(i,cos(i/180.0*pi)))
    sleep(0.005)

#Hoping to clear the blue curve...:
graphcurve.visible=0
#Redrawing the curve in green:
graphcurve.color=color.green
for i in range (0,360):
    graphcurve.plot(pos=(i,cos(i/180.0*pi)))
    sleep(0.005)