added a simple Conway's game of life

conways.py

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+'''
+-conway's game of life
+-made by Tzara Northcut @Mecknavorz
+-requires pygame
+'''
+
+#import the stuff we need
+import pygame, sys, time
+
+#-----------------------------------------
+#initalize some variables and other things
+#-----------------------------------------
+width = 6 #cell size width
+height = 6 #cell size height
+space = 2 #thickness of world lines
+#create the 2d array where we actually store vairables of cells
+world = [[0 for x in range(100)] for y in range(100)]
+
+#initialzie pygame
+pygame.init()
+
+size = [100*(width+space)+space, 100*(height+space)+space] #window size
+screen = pygame.display.set_mode(size) #make the window the right size
+
+#set spme colors
+BLACK = (  0,   0,   0) #background color
+WHITE = (255, 255, 255) #color of world
+GREEN = (  0,   0,   0) #color of cells that are alive and well
+RED = (255,   0,   0) #colors of the cells about to die
+
+#speed stuff
+clock = pygame.time.Clock() #clock used to manage game speed
+pause = True #used to control the steps, might not need this
+laststep = time.time()
+
+#used to keep runing until the game is closed
+done = False
+
+#-------------------------------------
+#some functions to be used in the game
+#-------------------------------------
+#determine #of cells nearby
+def getclose(x, y):
+    nearby = 0
+    #avoid out of bounds error and make the grid a torroid
+    if(x+1) > 99:
+        x = 0
+    if(y+1) > 99:
+        y = 0
+    #swcan nearby squares and if there's something there add 1 to the count
+    if world[x-1][y-1]:
+        nearby += 1
+    if world[x][y-1]:
+        nearby += 1
+    if world[x+1][y-1]:
+        nearby += 1
+    if world[x-1][y]:
+        nearby += 1
+    if world[x+1][y]:
+        nearby += 1
+    if world[x-1][y+1]:
+        nearby += 1
+    if world[x][y+1]:
+        nearby += 1
+    if world[x+1][y+1]:
+        nearby += 1
+    return nearby
+
+#calculate next step
+def nextStep():
+    for x in range(len(world)):
+        for y in range(len(world[0])):
+            near = getclose(x, y)
+            if near < 2: #if there are less than two neighbors then kill the cell
+                world[x][y] = 0
+            if near > 3: #if there are more than three neighbors then kill the cell
+                world[x][y] = 0
+            if (world[x][y] == 0) and (near == 3): #if there are 3 neighbors near a dead cell, revive it
+                world[x][y] = 1
+
+#clear the board
+def clear():
+    for x in range(len(world)):
+        for y in range(len(world[0])):
+            world[x][y] = 0
+
+#---------------------
+#the initale game loop
+#---------------------
+while not done:
+    #to make sure the game quits when we need it to
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            done = True
+        elif event.type == pygame.MOUSEBUTTONDOWN: #if we get a click
+            pos = pygame.mouse.get_pos() #find where the click was
+            #change the pixel coords into game coords
+            x = pos[1] // (height+space)
+            y = pos[0] // (width+space)
+            #add or remove the cell that's there
+            if world[x][y] == 0: #if the tile is empty add a cell
+                world[x][y] = 1
+                #print("nearby: ", getclose(x, y)) #used for debugging
+            else: #else if there's something there, remove the cell
+                world[x][y] = 0
+            #print("click: ", pos, "grid coord: ", x, y) #debug stuff
+        elif event.type == pygame.KEYDOWN: #pause the game when space is pressed
+            if event.key == pygame.K_SPACE:
+                #print('space pressed')
+                if pause:
+                    pause = False
+                elif not pause:
+                    pause = True
+            elif event.key == pygame.K_RIGHT: #if we presws the right key go forward a step
+                nextStep() #calculate the next
+            elif event.key == pygame.K_ESCAPE:
+                clear()
+
+
+    #draw the world
+    screen.fill(BLACK)
+    #maybe move this to a seprate function to help with effeciency?
+    for x in range(len(world)):
+        for y in range(len(world[0])):
+            color = WHITE
+            if world[x][y] == 1:
+                color = GREEN
+            pygame.draw.rect(screen, color, [(space+width)*y+space, (space+height)*x+space, width, height])
+
+    #set frame rate
+    clock.tick(60)
+    if (not pause) and ((time.time() - laststep) > .1):
+        laststep = time.time()
+        #print(laststep)
+        nextStep()
+    #update screen
+    pygame.display.flip()
+
+#if we;ve gotten this far (eg out of the while loop) we know it's time to quit
+pygame.quit()