When, geometrically, do you know you have BI?

JRutledge · #1 (**permalink**) Wed Feb 04, 2009, 01:34am

Quote:

Originally Posted by referee99

Rut, if the ball was pinned by the defender on the gaudy red X in the image in the OP, can we agree that the defender may be touching the ball while the ball was in the imaginary cylinder with the basket as its base?

If the touching was not in the cylinder, where the ball touches the backboard might not be relevant.

As I said, I think you are taking a judgment call and trying to make a one size fits all application. If the ball is not in the cylinder, it is not BI. If you think it is in the cylinder (and certain things are present), then call a violation. You will find that at full speed you are not going to get a simple judgment based on a marking. If the ball hits the backboard does not mean it was touched at the very same spot.

Peace

just another ref · #2 (**permalink**) Wed Feb 04, 2009, 01:43am

I think that while it is possible theoretically to use the backboard markings to determine a violation, in reality one would need at least a slow motion replay for this to be useful. See it. Call it. Live with it. This is a call that is very often difficult to make with complete certainty.

referee99 · #3 (**permalink**) Wed Feb 04, 2009, 01:49am

Quote:

Originally Posted by JRutledge

If the touching was not in the cylinder, where the ball touches the backboard might not be relevant.

As I said, I think you are taking a judgment call and trying to make a one size fits all application. If the ball is not in the cylinder, it is not BI. If you think it is in the cylinder (and certain things are present), then call a violation. You will find that at full speed you are not going to get a simple judgment based on a marking. If the ball hits the backboard does not mean it was touched at the very same spot.

Peace

I'm just intrigued by the geometry of it. Just to confirm, I'm talking about a pinned ball. Contacting the ball while it is in contact with the backboard.

I used to have a backboard and rim sitting in my garage. If i still had it I'd go roll a ball around on it and get some empirical knowledge. I am NOT willing to get a ladder out though.