def __init__(self, physworld, gravity, pos):
self.mWorld = physworld
self.__mParticles = []
for x in range(self.__mNrOfParticles):
rs = random.uniform(0.03, 0.12)
particle = Particle(physworld, -gravity/4.0, b2Vec2(rs, rs), min(rs * 10, 1), pos)
randDir = b2Vec2(random.uniform(-0.5, 0.5), random.uniform(-0.8, 0.2))
randDir.Normalize()
particle.mVelocity = randDir * (particle.mSpeed * random.uniform(0.2, 1.5))
self.__mParticles.append(particle)
