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#####################################################################
# -*- coding: iso-8859-1 -*- #
# #
# Frets on Fire #
# Copyright (C) 2006 Sami Kystil #
# #
# This program is free software; you can redistribute it and/or #
# modify it under the terms of the GNU General Public License #
# as published by the Free Software Foundation; either version 2 #
# of the License, or (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program; if not, write to the Free Software #
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, #
# MA 02110-1301, USA. #
#####################################################################
import pygame
import time
class Timer(object):
def __init__(self, fps = 60, tickrate = 1.0):
self.fps = fps
self.timestep = 1000.0 / fps
self.tickrate = tickrate
self.ticks = self.getTime()
self.frame = 0
self.fpsEstimate = 0
self.fpsEstimateStartTick = self.ticks
self.fpsEstimateStartFrame = self.frame
self.highPriority = False
def getTime(self):
return int(pygame.time.get_ticks() * self.tickrate)
time = property(getTime)
def advanceFrame(self):
while True:
ticks = self.getTime()
diff = ticks - self.ticks
if diff >= self.timestep:
break
if not self.highPriority:
pygame.time.wait(0)
self.ticks = ticks
self.frame += 1
if ticks > self.fpsEstimateStartTick + 250:
n = self.frame - self.fpsEstimateStartFrame
self.fpsEstimate = 1000.0 * n / (ticks - self.fpsEstimateStartTick)
self.fpsEstimateStartTick = ticks
self.fpsEstimateStartFrame = self.frame
return [min(diff, self.timestep * 16)]
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