Construct higher-res dots (circles for VCS)

[chaosphere2112]

Migrated from: CDAT/cdat#1439

[doutriaux1]

import vcs
x = vcs.init()
m = vcs.createmarker()                                                                                                                                                                                                
m.x = [.5]                                                                                                                                                                                                            
m.y=[.5]                                                                                                                                                                                                              
m.color= ['red']                                                                                                                                                                                                      
m.size = [34]                                                                                                                                                                                                         
x.plot(m)                                                                                                                                                                                                             

Notice the circle isn't very smooth

[doutriaux1]

marker.pdf

[doutriaux1]

to make things worse, changing the viewport makes thing terrible

m.viewport = [.2,.4,.01,.99]
x.plot(m) 

[doutriaux1]

m.viewport = [.1,.5,.01,.99]
x.clear)
x.plot(m)