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Juste une lumière, un vieux truc

from math import *
from kandinsky import *
from ion import *
from random import randint
la,q=floor(int(input("Largeur de l eclairage ="))),float(input("Qualite ?(1 a 2)="))
lx,ly,c=100,100,[]
for i in range(randint(5,6)):
  c.append(randint(0,300))
  c.append(randint(0,200))
  c.append(floor(5*randint(2,10)))
  c.append(floor(5*randint(2,10)))
def to(c,x,y):
  if x>320 or x<0 or y>220 or y<0:
    return True
  for w in range(0,len(c),4):
    if x>c[w] and x<c[w]+c[w+2]:
      if y>c[w+1] and y<c[w+1]+c[w+3]:
        return True
  return False
def tour(x,y,c,d,la,n):
  for i in range(floor(q*la)):
    x,y=x+sin(radians(d))/q,y+cos(radians(d))/q
    if to(c,x,y):
      return n+1,i
    else:
      v=round(255-255*i/(la*q))
      set_pixel(floor(x),floor(y),(v,v,v))
  return 0,0
fill_rect(0,0,320,240,(0,0,0))
n,ch=0,0
while True:
  if keydown(KEY_RIGHT):
    ch,lx=0,lx+30
    while keydown(KEY_RIGHT):
      pass
  elif keydown(KEY_LEFT):
    ch,lx=0,lx-30
    while keydown(KEY_LEFT):
      pass
  if keydown(KEY_UP):
    ly,ch=ly-30,0
    while keydown(KEY_UP):
      pass
  elif keydown(KEY_DOWN):
    ch,ly=0,ly+30
    while keydown(KEY_DOWN):
      pass
  if ch==0:
    ch=1
    fill_rect(0,0,320,240,(0,0,0))
    for d in range(360):
      x,y=lx,ly
      n,i=tour(x,y,c,d,la,n)
    for j in range(0,len(c),4):
      for x in range(c[j],c[j]+c[j+2]):
        for y in range(c[j+1],c[j+1]+c[j+3]):
          di=round(0.6*255*(1-((sqrt((x-lx)**2+(y-ly)**2)/la))))
          set_pixel(x,y,(di,di,di))