Prime Circle

Using circles to visualize prime appearance. The picture below is 1080 x 720 pixels, thus showing numbers up to 540 (on the far left and right).

Primes shown in a circle


# Python 2.7.7 Code
# Pygame 1.9.1 (for Python 2.7.7)
# Jonathan Frech 26th of December, 2015

# importing needed modules
import pygame, sys, time, math, os, random

""" FUNCTIONS """
# checks if n is prime
def prime(n):
	if n <= 1:
		return False
	else:
		for _ in range(2, n-1):
			if n % _ == 0:
				return False
	
	return True

""" GAME """
# game class
class GAME():
	# initialize program
	def __init__(self):
		self.WIDTH, self.HEIGHT = 1080*3, 720*3
		self.SIZE = [self.WIDTH, self.HEIGHT]
		self.SURF = pygame.Surface(self.SIZE)
		self.SCREEN = pygame.display.set_mode(self.SIZE)

		self.TICKS = 0
		self.RUNNING = True

		self.N = 1

		# functions
		pygame.display.set_caption("Prime Circle")
	
	# tick function
	def tick(self):
		# handle events
		for event in pygame.event.get():
			if event.type == pygame.QUIT:
				self.quit()
			if event.type == pygame.KEYDOWN:
				if event.key == pygame.K_SPACE:
					self.screenshot()


		# draw circles
		"""c = [255, 255, 255]
		if prime(self.N):
			c = [255, 0, 0]
		pygame.draw.circle(self.SURF, c, [self.WIDTH/2, self.HEIGHT/2], self.N, 1)"""
		
		if prime(self.N):
			pygame.draw.circle(self.SURF, [255, 0, 0], [self.WIDTH/2, self.HEIGHT/2], self.N, 1)

		self.N += 1

	# render function
	def render(self):
		# blit and flip
		self.SCREEN.blit(self.SURF, [0, 0])
		pygame.display.flip()
	
	# quits
	def quit(self):
		self.RUNNING = False

	# takes a screenshot
	def screenshot(self):
		path = os.getcwd() + "/out/"
		
		try:
			if not os.path.isdir(path):
				os.mkdir(path)
			
			name = "img" + str(len(os.listdir(path))) + ".png"
			pygame.image.save(self.SURF, path + name)
		except:
			pass

	# run function (uses tick() and render())
	def run(self):
		ticksPerSecond = 60
		lastTime = time.time() * 1000000000
		nsPerTick =  1000000000.0 / float(ticksPerSecond)
	
		ticks = 0
		frames = 0
	
		lastTimer = time.time() * 1000
		delta = 0.0
		
		while self.RUNNING:
			now = time.time() * 1000000000
			delta += float(now - lastTime) / float(nsPerTick)
			lastTime = now
			shouldRender = False
					
			while delta >= 1:
				ticks += 1
				self.TICKS += 1
				self.tick()
				delta -= 1
				shouldRender = True
			
			if shouldRender:
				frames += 1
				self.render()
			
			if time.time() * 1000 - lastTimer >= 1000:
				lastTimer += 1000
				
				# debug
				# print("Frames: " + str(frames) + ", ticks: " + str(ticks))
			
				frames = 0
				ticks = 0

# start game
GAME().run()
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