FS Letters II

Improving my first version – FS Letters – I changed a core behavior. Instead of going thru the whole file system, saving it, interpreting it and then displaying it, I now went for a dynamic approach. As the filesystem gets checked (60 times per second), the screen is also updating. This makes for both a more efficient (no freeze!) and a much nicer program. If the program is done checking the file system, the text ‘done’ will appear in the screen’s caption.

The First Example The Second Example The Third Example


# Python 2.7.7 Code
# Pygame 1.9.1 (for Python 2.7.7)
# Jonathan Frech 18th of June, 2015

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

""" CLASSES """
# dummy class for global variables
class dummy():
	pass

""" FUNCTIONS """
# gets the mouse position
def getMousePos():
	p = pygame.mouse.get_pos()
	return [p[0], p[1]]

# validates color integer
# extra feature: _min and _max implementation
def colorValid(_color, _min = 0, _max = 255):
	newColor = math.fabs(_color)
	n = _max - _min
	if newColor > n:
		if int(newColor / n) % 2 == 0:
			newColor = newColor % n
		else:
			newColor = n - (newColor % n)
	
	return int(newColor) + _min

# gets the position on a circle
# circle center                           : '_pos'
# circle radius                           : '_radius'
# angle from center to point on the circle: '_angle'
def getCirclePos(_pos, _radius, _angle):
	return [
				_pos[0] + _radius * math.cos(math.radians(_angle)),
				_pos[1] + _radius * math.sin(math.radians(_angle))
			]

# returns an integer version of given positon
def intpos(_pos):
	return [int(_pos[0]), int(_pos[1])]

# basic vector functions
def vecConvert(p1, p2):
	return [p2[0] - p1[0], p2[1] - p1[1]]
def vecLen(vec):
	return math.sqrt( (vec[0]**2) + (vec[1]**2) )
def vecMultiply(vec, n):
	return [vec[0] * n, vec[1] * n]
def vecGetPoint(vec, point):
	return [point[0] + vec[0], point[1] + vec[1]]
def vecAdd(vec1, vec2):
	return [vec1[0] + vec2[0], vec1[1] + vec2[1]]

# calculates distance between given positions
def posDistance(p1, p2):
	return math.sqrt( (p2[0] - p1[0])**2 + (p2[1] - p1[1])**2 )

# quits the program
def quit():
	sys.exit()


""" TICK; RENDER """
# tick function
def tick():
	# handle events
	for event in pygame.event.get():
		# quit
		if event.type == pygame.QUIT:
			quit()
		
		# keyup
		if event.type == pygame.KEYUP:
			# handle 'main.KEYSDOWN'
			if event.key in main.KEYSDOWN:
				main.KEYSDOWN.remove(event.key)
		
		# keydown
		if event.type == pygame.KEYDOWN:
			# handle 'main.KEYSDOWN'
			if event.key not in main.KEYSDOWN:
				main.KEYSDOWN.append(event.key)
	
	if len(main.PATHS) > 0:
		p = main.PATHS[0]
		main.PATHS.remove(p)
		for _ in os.listdir(p):
			if os.path.isdir(p + "/" + _):
				main.PATHS.append(p + "/" + _)
			else:
				file = p + "/" + _
				
				for __ in file:
					if __ in main.LETTERS:
						main.LETTERS[__] += 1
					else:
						main.LETTERS[__] = 1
					
					if main.LETTERS[__] > main.MAXLETTERCOUNT:
						main.MAXLETTERCOUNT = main.LETTERS[__]
	
	if not main.DONE:
		if len(main.PATHS) <= 0:
			main.DONE = True
			
			pygame.display.set_caption(main.CAPTION + " (done)")
	
	# printout
	#print main.LETTERS
				
				

# render function
def render():
	if True:#main.TICKS % 60 == 0 or main.TICKS <= 1: 		# fill 		main.SURF.fill(main.COLOR) 		 		for _ in main.LETTERS: 			if not _ in main.LETTERPOS: 				main.LETTERPOS[_] = [random.randint(0, main.WIDTH), random.randint(0, main.HEIGHT)] 			 			size = int(main.MAXLETTERSIZE / main.MAXLETTERCOUNT * main.LETTERS[_]) 			 			if size >= 5:
				pos = main.LETTERPOS[_]
				color = [255. / main.MAXLETTERCOUNT * main.LETTERS[_], 0, 0]
				
				font = pygame.font.Font(None, size)
				text = font.render(_, 1, color)
				rect = text.get_rect()
				
				if pos[0] + rect.right > main.WIDTH:
					main.LETTERPOS[_][0] = main.WIDTH - rect.right
				if pos[1] + rect.bottom > main.HEIGHT:
					main.LETTERPOS[_][1] = main.HEIGHT - rect.bottom
				
				main.SURF.blit(text, pos)
		
		# blit and flip
		main.SCREEN.blit(main.SURF, [0, 0])
		pygame.display.flip()

""" INIT """
# initialize program
def init():
	main.WIDTH, main.HEIGHT = 1080, 720
	main.SIZE = [main.WIDTH, main.HEIGHT]
	main.CENTER = [main.WIDTH / 2., main.HEIGHT / 2.]
	main.SCREEN = pygame.display.set_mode(main.SIZE)
	main.SURF = pygame.Surface(main.SIZE)
	
	main.CAPTION = "FS Letters II"
	main.COLOR = [0, 0, 0]
	main.TICKS = 0
	main.KEYSDOWN = []
	
	main.PATHS = ["/Users"]
	main.MAXLETTERCOUNT = 0
	main.LETTERS = {"":0}
	main.LETTERPOS = {"":[0, 0]}
	main.MAXLETTERSIZE = 300.
	
	main.DONE = False
	
	# functions
	pygame.display.set_caption(main.CAPTION + " (running...)")
	pygame.font.init()

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

# main variable
main = dummy()
init()

# start program
run()
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