how to draw a single point

[aaaa]

Excuse me, the code bellow can't draw a single dot:

import viz
viz.go()
viz.startLayer(viz.POINTS)
viz.vertex(0,1.8,1)
viz.endLayer()

the code bellow can draw two points:

import viz
viz.go()
viz.startLayer(viz.POINTS)
viz.vertex(0,1.8,1)
viz.vertex(0,1.7,1)
viz.endLayer()


My problem is how to draw a single dot.

[farshizzo]

You will need to disable culling on the object, since a single point will result in a infinitely small bounding box. Try the following code:
import viz
viz.go()
viz.startLayer(viz.POINTS)
viz.vertex(0,1.8,1)
points = viz.endLayer()
points.disable(viz.CULLING)

[aaaa]

Thanks very much