a-robots-conundrum/robotgame/fadeout.py

57 lines
2.0 KiB
Python

# This file is part of ROBOTGAME
#
# ROBOTGAME 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 3 of the License, or (at your option) any later
# version.
#
# ROBOTGAME 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
# ROBOTGAME. If not, see <http://www.gnu.org/licenses/>.
#
# ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
#
# fadeout.py
# --------------------
# date created : Thu Aug 9 2012
# copyright : (C) 2012 Niels G. W. Serup
# maintained by : Niels G. W. Serup <ns@metanohi.name>
"""
Fade out and in.
"""
import os
import pygame
class Fadeout(object):
def __init__(self, game, function):
self.__dict__.update(locals())
self.game.objs.append(self)
self.img = pygame.Surface(self.game.window.get_size())
self._start_time = pygame.time.get_ticks()
self._middle_time = self._start_time + 500
self._end_time = self._middle_time + 500
self.img.set_alpha(0)
self.img.fill((0, 0, 0))
self._has_run = False
def update(self, e, t, dt):
if t < self._middle_time:
self.img.set_alpha(255 * (t - self._start_time) / 500)
else:
if not self._has_run:
self.function()
self._has_run = True
if t < self._end_time:
self.img.set_alpha(255 * (500 - (t - self._middle_time)) / 500)
else:
self.game.objs.remove(self)
self.update = lambda *xs: None
def draw(self, window):
window.blit(self.img, (0, 0))