50% enclosed

I love maths, always have, I know the universe is fundamentally explainable with maths. But how about trying to work out how to define and calculate "50% ENCLOSED". I thought initially it could be that a simple approach was necessary and we would treat the subject as a number of faces. If all the faces were covered then that was 100% enclosed. But what about the floor and what if a face had a window or a permanent grill. I hope someone in the offices of power is having a go at this too.

I took a leap because I wanted it to be thorough and allow for all circumstances. I first considered the result was dependant on perspectives. Two perspectives to be clear. The first was whether the place was enclosed from the position of production of smoke or the point of passive consumption of smoke, I decided that the consumption point was the whole point of the idea. The result of adequate enclosure was to increase passive smoking. The second perspective was static or dynamic and without any 3d shadow of a doubt dynamic was the complicated answer. The "enclosure quotient" grew and was now dependant on the position of the passive inhaler in the area.

I now considered units and naturally as the influence of enclosure was on flux or rate of change of air volumes then the quotient would be a ratio of the SI unit litres. I could soon see the Button Enclosure Quotient Constant (BEQC) being delivered.