questions about the duckcourt example

[Eunice]

I'm looking at the duckcourt.py.

1. It doesn't enable viz.PHYSICS though it does use ODE

2. It doesn't import court.wrl
I expected to see code like
court = viz.add("court.wrl")
but it's not in the duckcourt.py file

court.collidemesh() enables collision detection with the court mesh, why ducks can intersect with it but balls can't? Where is the code for this?

3. Where is the definition of scoreLabel?

Thanks.