# Name: Distance Foam
# Description: Creates foam particles based on the length of 2 objects. Good for waterfall foam.
# Author 	: Brandon Young
# Date 		: August 30th 2008
# Version	: 1.5
#---------------------------------------


def onSimulationStep():
	import random
	velMult = .5 # this adjusts the inherited velocity of the particles  example  .1 = 10% 1 = 100%
	randval = 10.0  # this is sort of  like a falloff parameter the bigger the futher out side the nulls the particles will be bron.
	liquid = scene.getEmitter("Circle01")
	foam = scene.getEmitter("Square01") 
	object_a = Null02.getParameter("Position X") #change Position X to Position Y,or Position Z for the other axis.
	object_b = Null01.getParameter("Position X") #change Position X to Position Y,or Position Z for the other axis.
	length = object_b - object_a
	p = liquid.getFirstParticle()
	while p:
		nextp = p.getNextParticle()
		if (p.getPosition().getX()- object_a)/(length+0.0001) > random.uniform(0.0,randval): #change .getX to getY,or getZ for the other axis.
			pos = p.getPosition()
			vel = p.getVelocity()
			velx = vel.x * velMult 
			vely = vel.y * velMult 
			velz = vel.z * velMult 
			newvel = Vector.new(velx,vely,velz)
			foam.addParticle(pos, newvel)
			liquid.removeParticle(p.getId())	
		p = nextp
#--------------------------------------------------
# Function: onSimulationFrame 
#--------------------------------------------------

def onSimulationFrame():
	pass

#--------------------------------------------------
# Function: onSimulationBegin
#--------------------------------------------------

def onSimulationBegin():
	pass


#--------------------------------------------------
# Function: onSimulationEnd 
#--------------------------------------------------

def onSimulationEnd():
	pass




#--------------------------------------------------
# Function: onChangeToFrame 
#--------------------------------------------------

def onChangeToFrame():
	pass