class Particle:
def __init__(self, x, y, duration, xv = 0, yv = 0):
self.x = x
self.y = y
self.t = duration
self.xv = xv
self.yv = yv
def update(self, time):
self.x += self.xv * time
self.y += self.yv * time
self.t -= duration
return self.t >= 0
class ParticleGenerator:
def __init__(self, rate):
self.particles = []
self.rate = rate
self.time_modulus = 0
def update(self, time):
# i'd like to check the constant rate logic in this line
new_particle_count, self.time_modulus = divmod(time +
self.time_modulus, self.rate)
for idx, particle in self.particles:
