[PD] in/out count

[Martin Schied]

potax flan wrote:
> yo
> this is doing my head in but i guess it's not rocket science...
> trying to figure out a system to keep track of how many people are in 
> a room at any given moment.
> already have 2 sensors doing the physical work and sending bangs to 
> pd, but then i get stuck...
> ii have 2 bangs – one for the left sensor, the other for the right, so 
> that the left+right sequence means someone goes in and the right+left 
> one means someone leaves the room.
> i was trying to make it as elegant and simple as possible instead of 
> having a crazy gate/select contraption.
> ideas?
this is what I figured out (attached)

Martin
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