Have Condition1 stays True until Condition2

[Vincent Prevosto]

Hi all,

I'm building a workflow where there's a boolean (Threshold1 in excerpt below), that is quite noisy - it oscillates between True and False fairly rapidly, and I'd like it to stay True, until a second boolean value (Threshold2) becomes True (then become False until Threshold1's condition is met again). Basically, I'm trying to get clean ON / OFF cycles. I've tried a simple SkipUntil workflow, or adding DistinctUntilChanged conditions, or also use SkipWhile, but I can never actually get the desired outcome. I feel this has been solved many times previously, I just don't find the solution on the forum. Any tip on how to solve this?

Thanks

[Vincent Prevosto]

I just implemented a solution in a Python transform, but I'd be curious is someone has a more Bonsai-esque solution.

cycleOn = False

@returns(bool)
def process(value):
  global cycleOn

  if value.Item1>2 and value.Item2>2:
    onCycleTrig = True
    offCycleTrig = False
  elif value.Item1<-2 and value.Item2>2:
    onCycleTrig = False
    offCycleTrig = True
  else:
    onCycleTrig = False
    offCycleTrig = False

  if cycleOn == True:
    if offCycleTrig == False:
      cycleOn = True
      return False
    else:
      cycleOn = False
      return False
   
  if cycleOn == False:
    if onCycleTrig == True:
      cycleOn = True
      return True
    else:
      cycleOn = False
      return False

[Gonçalo Lopes]

Hi Vincent,

I think Chi-Yu posted a solution for this hysteresis double threshold very recently, using Scan:

https://groups.google.com/forum/#!topic/bonsai-users/uku5zI2CYLM

Maybe we can move the discussion over there, if there is anything that is unclear?

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[Vincent Prevosto]

Sure