Block tracker ON / OFF signal

Martial

Hello,

I am trying to achieve a simple task like using the blob tracker to trigger a column : when a blob is present, trigger column #2 and when the blob disappear trigger column #1.

I can't figure out how to achieve this. I tried the blob tracker radius option but can't figure out how to tell millumin to trigger a chosen column based on presence or not.

Any idea ?

Millumin

Hello @Martial,

There is no interaction in the blob-tracker to tell if a blob appeared or disappeared.

But this could be achieved with a simple script :

lastActivity = 0
presence = false

onBlobTrackerEvent = function(event)
{
  lastActivity = Date.now()
}

function check()
{
  if( presence == false && Date.now()-lastActivity < 100 )
  {
    presence = true
    log("someone has arrived")
  }
  else if( presence == true && 100 < Date.now()-lastActivity )
  {
    presence = false
    log("somene has left")
  }
}

setInterval(check, 50)

Best. Philippe