This Free Friday, the first half of class was a fun break from the usual routine \u2014 we tried a variety of hot sauces with chicken nuggets, which made for a pretty entertaining time.<\/p>\n\n\n\n
For the other half of class, I watched YouTube and played Nitro Type, and then I finished a turtle game.<\/p>\n\n\n\n
This is The Code:<\/p>\n\n\n\n
import turtle<\/p>\n\n\n\n
import colorsys<\/p>\n\n\n\n
import random<\/p>\n\n\n\n
import math<\/p>\n\n\n\n
screen = turtle.Screen()<\/p>\n\n\n\n
screen.setup(1000,1000)<\/p>\n\n\n\n
screen.title(\u201cSynchronized Fireflies – PythonTurtle.Academy\u201d)<\/p>\n\n\n\n
turtle.hideturtle()<\/p>\n\n\n\n
turtle.speed(0)<\/p>\n\n\n\n
turtle.tracer(0,0)<\/p>\n\n\n\n
H_YELLOWGREEN = 0.22 # constant: hue value of yellow green color.<\/p>\n\n\n\n
V_DARK = 0.1 # constant: brightness value of initial dark state<\/p>\n\n\n\n
V_BRIGHT = 1 # constant: brightness value of the brightest state<\/p>\n\n\n\n
FPS = 30 # constant: refresh about 30 times per second<\/p>\n\n\n\n
TIMER_VALUE = 1000\/\/FPS # the timer value in milliseconds for timer events<\/p>\n\n\n\n
CYCLE = 5 # costant: 5 second cycle for firefly to light up<\/p>\n\n\n\n
LIGHTUP_TIME = 1 # constant: 1 second light up and dim<\/p>\n\n\n\n
SPEED = 20 # 100 units per second<\/p>\n\n\n\n
CLOSE_ENOUGH = 16 # if distance squared to target is less than 16, then it is close enough.<\/p>\n\n\n\n
# make sure that this number is greater than SPEED\/FPS squared<\/p>\n\n\n\n
N = 300 # Number of fireflies<\/p>\n\n\n\n
PHASE_DELTA = 0.01 # increment of phase when saw a neighbor fires up<\/p>\n\n\n\n
fireflies = [] # list of firefly turtles<\/p>\n\n\n\n
v = [] # list of brightness values<\/p>\n\n\n\n
phase = [] # list of phases<\/p>\n\n\n\n
current_xpos = [] # list of current x coordinate<\/p>\n\n\n\n
current_ypos = [] # list of current y coordinate<\/p>\n\n\n\n
target_xpos = [] # list of target x coordinate<\/p>\n\n\n\n
target_ypos = [] # list of raget y coordinate<\/p>\n\n\n\n
def initialze_fireflies():<\/p>\n\n\n\n
for i in range(N):<\/p>\n\n\n\n
fireflies.append(turtle.Turtle()) # Add a turtle to the firefly turtle list<\/p>\n\n\n\n
v.append(V_DARK) # set them DARK first. The update function will update it to the correct value<\/p>\n\n\n\n
phase.append(random.uniform(0,CYCLE)) # phase is random from 0 to CYCLE<\/p>\n\n\n\n
current_xpos.append(random.uniform(-500,500)) # Let them go anywhere on screen<\/p>\n\n\n\n
current_ypos.append(random.uniform(-500,500))<\/p>\n\n\n\n
target_xpos.append(random.uniform(-500,500))<\/p>\n\n\n\n
target_ypos.append(random.uniform(-500,500))<\/p>\n\n\n\n
for firefly in fireflies: # initialize these turtles<\/p>\n\n\n\n
firefly.hideturtle()<\/p>\n\n\n\n
firefly.up()<\/p>\n\n\n\n
def compute_brightness(phase):<\/p>\n\n\n\n
if phase < CYCLE-LIGHTUP_TIME:<\/p>\n\n\n\n
temp = V_DARK # dormant period<\/p>\n\n\n\n
elif phase < CYCLE-LIGHTUP_TIME\/2: # gradually (linearly) lighting up period<\/p>\n\n\n\n
temp = V_DARK + (V_BRIGHT-V_DARK)*(phase-(CYCLE-LIGHTUP_TIME))\/(LIGHTUP_TIME\/2)<\/p>\n\n\n\n
else: # gradually (linearly) dimming period<\/p>\n\n\n\n
temp = V_BRIGHT – (V_BRIGHT-V_DARK)*(phase-(CYCLE-LIGHTUP_TIME\/2))\/(LIGHTUP_TIME\/2)<\/p>\n\n\n\n
return temp<\/p>\n\n\n\n
def update_neibors(k):<\/p>\n\n\n\n
global phase<\/p>\n\n\n\n
for i in range(N):<\/p>\n\n\n\n
if i == k or phase[i] == CYCLE-LIGHTUP_TIME\/2: # don\u2019t update phase for itself or fireflies at peak<\/p>\n\n\n\n
continue<\/p>\n\n\n\n
if phase[i] < CYCLE-LIGHTUP_TIME\/2: # before peak<\/p>\n\n\n\n
phase[i] = min(CYCLE-LIGHTUP_TIME\/2,phase[i]+PHASE_DELTA) # make sure don\u2019t pass the peak after incrementing phase<\/p>\n\n\n\n
else: # after peak<\/p>\n\n\n\n
phase[i] += PHASE_DELTA # increment phase by delta<\/p>\n\n\n\n
if phase[i] > CYCLE: # phase passed CYCLE<\/p>\n\n\n\n
phase[i] -= CYCLE # make sure stays within CYCLE<\/p>\n\n\n\n
v[i] = compute_brightness(phase[i]) # with new phase, update the brightness<\/p>\n\n\n\n
def update_brightness():<\/p>\n\n\n\n
global phase,v<\/p>\n\n\n\n
for i in range(N):<\/p>\n\n\n\n
phase[i] += TIMER_VALUE\/1000 # increase the phase by time passed<\/p>\n\n\n\n
if phase[i] > CYCLE: # phase passed CYCLE<\/p>\n\n\n\n
phase[i] -= CYCLE # make sure phase stays within CYCLE<\/p>\n\n\n\n
if phase[i] > CYCLE-LIGHTUP_TIME\/2 and phase[i] – TIMER_VALUE\/1000 < CYCLE-LIGHTUP_TIME\/2: # skipped peak<\/p>\n\n\n\n
phase[i] = CYCLE-LIGHTUP_TIME\/2 #cheat here: adjust phase to peak value<\/p>\n\n\n\n
v[i] = compute_brightness(phase[i]) # compute the brightness based on phase<\/p>\n\n\n\n
for i in range(N): # update other fireflies<\/p>\n\n\n\n
if phase[i] == CYCLE-LIGHTUP_TIME\/2: # only update when firefly is in peak<\/p>\n\n\n\n
update_neibors(i) # try to influence other fireflies<\/p>\n\n\n\n
def update_position():<\/p>\n\n\n\n
global current_xpos,current_ypos,target_xpos,target_ypos<\/p>\n\n\n\n
for i in range(N):<\/p>\n\n\n\n
# move towards target SPEED\/FPS steps<\/p>\n\n\n\n
# figure out angle to target first<\/p>\n\n\n\n
angle_to_target = math.atan2(target_ypos[i]-current_ypos[i],target_xpos[i]-current_xpos[i])<\/p>\n\n\n\n
# compute changes to current position based on the angle and distance to move per 1\/FPS second.<\/p>\n\n\n\n
current_xpos[i] += SPEED\/FPS*math.cos(angle_to_target)<\/p>\n\n\n\n
current_ypos[i] += SPEED\/FPS*math.sin(angle_to_target)<\/p>\n\n\n\n
# check to see if close enough to target.<\/p>\n\n\n\n
dist_to_target_squared = (current_xpos[i]-target_xpos[i])**2 + (current_ypos[i]-target_ypos[i])**2<\/p>\n\n\n\n
if dist_to_target_squared < CLOSE_ENOUGH: # close enough, set new target<\/p>\n\n\n\n
target_xpos[i] = random.randint(-500,500) # target x coordinate, random location<\/p>\n\n\n\n
target_ypos[i] = random.randint(-500,500) # target y coordinate, random location<\/p>\n\n\n\n
def update_states():<\/p>\n\n\n\n
global should_draw<\/p>\n\n\n\n
update_brightness()<\/p>\n\n\n\n
update_position()<\/p>\n\n\n\n
should_draw = True<\/p>\n\n\n\n
screen.ontimer(update_states,TIMER_VALUE)<\/p>\n\n\n\n
def draw():<\/p>\n\n\n\n
global v,fireflies,should_draw,current_xpos,current_ypos<\/p>\n\n\n\n
if should_draw == False: # There is no change. Don\u2019t draw and return immediately<\/p>\n\n\n\n
return<\/p>\n\n\n\n
for i in range(N):<\/p>\n\n\n\n
fireflies[i].clear() # clear the current drawing<\/p>\n\n\n\n
color = colorsys.hsv_to_rgb(H_YELLOWGREEN,1,v[i]) # use colorsys to convert HSV to RGB color<\/p>\n\n\n\n
fireflies[i].color(color)<\/p>\n\n\n\n
fireflies[i].goto(current_xpos[i],current_ypos[i])<\/p>\n\n\n\n
fireflies[i].dot(10)<\/p>\n\n\n\n
should_draw = False # just finished drawing, set should_draw to False<\/p>\n\n\n\n
screen.bgcolor(\u2018black\u2019)<\/p>\n\n\n\n
initialze_fireflies()<\/p>\n\n\n\n
update_states()<\/p>\n\n\n\n
while True:<\/p>\n\n\n\n
draw() # draw forever<\/p>\n\n\n\n
screen.update()<\/p>\n","protected":false},"excerpt":{"rendered":"
This Free Friday, the first half of class was a fun break from the usual routine \u2014 we tried a variety of hot sauces with chicken nuggets, which made for a pretty entertaining time. For the other half of class, I watched YouTube and played Nitro Type, and then I finished a turtle game. This […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/posts\/31","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/comments?post=31"}],"version-history":[{"count":1,"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/posts\/31\/revisions"}],"predecessor-version":[{"id":32,"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/posts\/31\/revisions\/32"}],"wp:attachment":[{"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/media?parent=31"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/categories?post=31"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/theroyalscode.com\/students\/h_yusko\/wp-json\/wp\/v2\/tags?post=31"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}