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"""A timer for games with set-rate FPS.
"""
import pygame
class Timer:
"""A timer for games with set-rate FPS.
<pre>Timer(fps)</pre>
"""
def __init__(self,fps):
if fps == 0:
self.tick = self._blank
return
self.wait = 1000/fps
self.nt = pygame.time.get_ticks()
pygame.time.wait(0)
def _blank(self):
pass
def tick(self):
"""Wait correct amount of time each frame. Call this once per frame.
<pre>Timer.tick()</pre>
"""
self.ct = pygame.time.get_ticks()
if self.ct < self.nt:
pygame.time.wait(self.nt-self.ct)
self.nt+=self.wait
else:
self.nt = pygame.time.get_ticks()+self.wait
class Speedometer:
"""A timer replacement that returns out FPS once a second.
<pre>Speedometer()</pre>
<strong>Attributes</strong>
<dl>
<dt>fps <dd>always set to the current FPS
</dl>
"""
def __init__(self):
self.frames = 0
self.st = pygame.time.get_ticks()
self.fps = 0
def tick(self):
""" Call this once per frame.
<pre>Speedometer.tick()</pre>
"""
r = None
self.frames += 1
self.ct = pygame.time.get_ticks()
if (self.ct - self.st) >= 1000:
r = self.fps = self.frames
#print "%s: %d fps"%(self.__class__.__name__,self.fps)
self.frames = 0
self.st += 1000
pygame.time.wait(0) #NOTE: not sure why, but you gotta call this now and again
return r
# vim: set filetype=python sts=4 sw=4 noet si :
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