locate a certain point in the scene 3D

[Johannes]

Is it possible to locate a certain point in the scene by clicking on it with the mouse?

I would like to use this to position my objects (e.g. I click on a certain position with my mouse and get the position printed) then I cann translate my object there...

def mouse...

	if button == viz.MOUSEBUTTON_RIGHT:
		line = viz.screentoworld(viz.mousepos())
		begin = line[:3]
		end = line[3:]
		viz.startlayer(viz.LINE_LOOP)
		viz.vertex(begin)
		viz.vertex(end)
		cube = viz.endlayer()
		print end

Johannes

P.S. out of certain reasons I don't want to use the stage.