It’s rather quick tip, not script

Normally to target an object, You would have to play with matrix but Realflow have better way.

You can easily define any kind of emitter and target object (it’s better to use Null object that You can parent to anything You want )

Paste script below on “event script editor”, over “onSimulationStep” definition.

#--------------------------------------------------
# Function: onSimulationStep
#--------------------------------------------------

def onSimulationStep():

 #--------------------------------
 # Define emitter and target object here
 emitter = "Square01"
 TargetObject = "Null01"
 #--------------------------------

 emit = scene.getEmitter(emitter)
 null = scene.getObject(TargetObject)
 axis = scene.getAxisSetup()
 if axis == AXIS_SETUP_YXZ:
 startVec = Vector.new(0.0, -1.0, 0.0)
 elif axis == AXIS_SETUP_ZXY:
 startVec = Vector.new(0.0, 0.0, -1.0)
 elif axis == AXIS_SETUP_YZX:
 startVec = Vector.new(0.0, -1.0, 0.0)
 nullpos = null.getParameter("Position")
 emitpos = emit.getParameter("Position")
 pointVec = nullpos - emitpos
 rotVec = startVec.getEulerAngles(pointVec)
 emit.setParameter("Rotation", rotVec)

 pass

And [SAMPLE] scene