[Pygame] Sorting Algorithms in Python 파이썬 정렬 알고리즘 2
Python 2024. 3. 22. 15:14 |반응형
기본 정렬 알고리즘 세 가지(퀵, 머지, 힙)를 파이게임으로 시각화 해 보자.
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import os
import random
os.environ['PYGAME_HIDE_SUPPORT_PROMPT'] = '1'
import pygame
from math import ceil, floor
pygame.init()
pygame.display.set_caption("Sorting Visualization")
screensize = (640, 580)
screen = pygame.display.set_mode(screensize)
clock = pygame.time.Clock()
framerate = 10
running = True
font = pygame.font.Font(None, 30)
text = font.render("Sorting Visualization\n\n" +
"*q: Quick Sorting [ O(nlogn) ]\n" +
"*m: Merge Sorting [ O(nlogn) ]\n" +
"*h: Heap Sorting [ O(nlogn) ]\n" +
"\n*g: Random Data Generation", True, "gray")
text_pos = text.get_rect()
text_pos.center = (screen.get_width()/2, text_pos.height/2)
data_size = 64
data = list()
data_color = list()
def DataGenerator():
global data
global data_color
data = [random.randint(10, 400) for i in range(data_size)]
data_color = [(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
for i in range(data_size)]
DataGenerator()
def Visualize():
screen.fill("black")
screen.blit(text, text_pos)
for i in range(data_size):
pygame.draw.rect(screen, data_color[i], (i*10, screensize[1]-data[i], 10, data[i]))
pygame.display.flip()
clock.tick(framerate)
def Finalize():
screen.fill("white")
pygame.display.flip()
clock.tick(framerate)
def EventHandler():
for event in pygame.event.get():
if event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE:
return -1
elif event.type == pygame.QUIT:
exit()
def QuickSort(start, end):
if start >= end:
return
pivot = start
left = start + 1
right = end
while left <= right:
if EventHandler() == -1:
return
while left <= end and data[left] <= data[pivot]:
left += 1
while right > start and data[right] >= data[pivot]:
right -= 1
if left > right:
data[right], data[pivot] = data[pivot], data[right]
data_color[right], data_color[pivot] = data_color[pivot], data_color[right]
else:
data[left], data[right] = data[right], data[left]
data_color[left], data_color[right] = data_color[right], data_color[left]
Visualize()
QuickSort(start, right-1)
QuickSort(right+1, end)
def MergeSort_1(data_list, color_list):
if len(data_list) < 2:
return data_list, color_list
mid = len(data_list) // 2
low_data_list, low_color_list = MergeSort_1(data_list[:mid], color_list[:mid])
high_data_list, high_color_list = MergeSort_1(data_list[mid:], color_list[mid:])
merged_data_list = list()
merged_color_list = list()
l = h = 0
while l < len(low_data_list) and h < len(high_data_list):
if low_data_list[l] < high_data_list[h]:
merged_data_list.append(low_data_list[l])
merged_color_list.append(low_color_list[l])
l += 1
else:
merged_data_list.append(high_data_list[h])
merged_color_list.append(high_color_list[h])
h += 1
merged_data_list += low_data_list[l:]
merged_color_list += low_color_list[l:]
merged_data_list += high_data_list[h:]
merged_color_list += high_color_list[h:]
return merged_data_list, merged_color_list
def MergeSort_2():
def sort(low, high):
if EventHandler() == -1:
return
if high - low < 2:
return
mid = (low + high) // 2
sort(low, mid)
sort(mid, high)
merge(low, mid, high)
def merge(low, mid, high):
data_temp = list()
color_temp = list()
l, h = low, mid
while l < mid and h < high:
if data[l] < data[h]:
data_temp.append(data[l])
color_temp.append(data_color[l])
l += 1
else:
data_temp.append(data[h])
color_temp.append(data_color[h])
h += 1
while l < mid:
data_temp.append(data[l])
color_temp.append(data_color[l])
l += 1
while h < high:
data_temp.append(data[h])
color_temp.append(data_color[h])
h += 1
for i in range(low, high):
data[i] = data_temp[i - low]
data_color[i] = color_temp[i - low]
Visualize()
sort(0, data_size)
def HeapSort():
for i in range(len(data)):
par = ceil(i/2) - 1
while par >= 0 and data[par] < data[i]:
data[par], data[i] = data[i], data[par]
data_color[par], data_color[i] = data_color[i], data_color[par]
i = par
par = floor((i-1)/2)
for i in range(len(data)-1, 0, -1):
data[0], data[i] = data[i], data[0]
data_color[0], data_color[i] = data_color[i], data_color[0]
cur = 0
lch = 1
rch = 2
while True:
if EventHandler() == -1:
return
if rch < i and data[lch] < data[rch]:
lch = rch
if lch < i and data[lch] > data[cur]:
data[lch], data[cur] = data[cur], data[lch]
data_color[lch], data_color[cur] = data_color[cur], data_color[lch]
Visualize()
cur = lch
lch = cur * 2 + 1
rch = cur * 2 + 2
else:
lch = i # break와 같은 효과
if not lch < i:
break
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE:
running = False
elif event.type == pygame.KEYDOWN and event.key == pygame.K_q:
QuickSort(0, data_size - 1)
Finalize()
elif event.type == pygame.KEYDOWN and event.key == pygame.K_m:
MergeSort_2()
Finalize()
elif event.type == pygame.KEYDOWN and event.key == pygame.K_n:
data, data_color = MergeSort_1(data, data_color)
Finalize()
elif event.type == pygame.KEYDOWN and event.key == pygame.K_h:
HeapSort()
Finalize()
elif event.type == pygame.KEYDOWN and event.key == pygame.K_g:
DataGenerator()
Visualize()
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코드를 작성하고 실행한다.
※ 참고
2024.03.09 - [Python] - [Pygame] Sorting Algorithms in Python 파이썬 정렬 알고리즘 1
알고리즘_05_강의록.pdf
3.91MB
알고리즘_04_강의록.pdf
1.86MB
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