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"""FpsClock - a clock to manage a game's FPS stuff"""
import pygame.time
class FpsClock:
"class for managing FPS related stuff"
def __init__(self, desired_fps=30, do_report=0):
"create FpsClock instance, give desired running fps and enable report"
self.do_report = do_report
self.frame_count = 0
self.frame_timer = pygame.time.get_ticks()
self.frame_delay = 0
self.last_tick = pygame.time.get_ticks()
self.set_fps(desired_fps)
self.current_fps = 0.0
def set_fps(self, desired_fps):
"set the desired frames per second"
if desired_fps:
self.fps_ticks = int((0.975/desired_fps) * 1000)
#slight fudge, not quite 1000millis
else:
self.fps_ticks = 0
self.desired_fps = desired_fps
def tick(self):
"call this once per frame"
#delay until milliseconds per frame has passed
if self.fps_ticks:
now = pygame.time.get_ticks()
wait = self.fps_ticks - (now - self.last_tick)
pygame.time.delay(wait)
self.frame_delay += wait
self.last_tick = pygame.time.get_ticks()
#update current_fps
self.frame_count += 1
time = self.last_tick - self.frame_timer
if time > 1000:
time -= self.frame_delay
self.current_fps = self.frame_count / ((time / 1000.0) or 1)
self.frame_count = 0
self.frame_delay = 0
self.frame_timer = self.last_tick
if self.do_report: self.report()
def report(self):
"override this for fancier fps reporting"
subst = 1.0/self.current_fps, self.current_fps
print 'AVG TIME: %.3f FPS: %.2f' % subst
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