Answer:
import simplegui
import random
# global constants
WIDTH = 600
HEIGHT = 400
PARTICLE_RADIUS = 5
COLOR_LIST = ["Red", "Green", "Blue", "White"]
DIRECTION_LIST = [[1,0], [0, 1], [-1, 0], [0, -1]]
# definition of Particle class
class Particle:
# initializer for particles
def __init__(self, position, color):
self.position = position
self.color = color
# method that updates position of a particle
def move(self, offset):
self.position[0] += offset[0]
self.position[1] += offset[1]
# draw method for particles
def draw(self, canvas):
canvas.draw_circle(self.position, PARTICLE_RADIUS, 1, self.color, self.color)
# string method for particles
def __str__(self):
return "Particle with position = " + str(self.position) + " and color = " + self.color
# draw handler
def draw(canvas):
for p in particle_list:
p.move(random.choice(DIRECTION_LIST))
for p in particle_list:
p.draw(canvas)
# create frame and register draw handler
frame = simplegui.create_frame("Particle simulator", WIDTH, HEIGHT)
frame.set_draw_handler(draw)
# create a list of particles
particle_list = []
for i in range(100):
p = Particle([WIDTH / 2, HEIGHT / 2], random.choice(COLOR_LIST))
particle_list.append(p)
# start frame
frame.start()
Explanation:
this worked for me, sorry if its to late. let me know if anything is wrong
